Plethysmography, Whole Body
Plethysmography, Impedance
Vasodilation
Nitroprusside
Airway Resistance
Lung Volume Measurements
Thorax
Respiratory Mechanics
Respiration
The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (= OXYGEN CONSUMPTION) or cell respiration (= CELL RESPIRATION).
Hyperemia
Tidal Volume
Total Lung Capacity
The volume of air contained in the lungs at the end of a maximal inspiration. It is the equivalent to each of the following sums: VITAL CAPACITY plus RESIDUAL VOLUME; INSPIRATORY CAPACITY plus FUNCTIONAL RESIDUAL CAPACITY; TIDAL VOLUME plus INSPIRATORY RESERVE VOLUME plus functional residual capacity; or tidal volume plus inspiratory reserve volume plus EXPIRATORY RESERVE VOLUME plus residual volume.
Vascular Resistance
Thoracic Wall
Pulmonary Ventilation
Venous Pressure
Infusions, Intra-Arterial
Methacholine Chloride
A quaternary ammonium parasympathomimetic agent with the muscarinic actions of ACETYLCHOLINE. It is hydrolyzed by ACETYLCHOLINESTERASE at a considerably slower rate than ACETYLCHOLINE and is more resistant to hydrolysis by nonspecific CHOLINESTERASES so that its actions are more prolonged. It is used as a parasympathomimetic bronchoconstrictor agent and as a diagnostic aid for bronchial asthma. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1116)
Hand-Arm Vibration Syndrome
An occupational disorder resulting from prolonged exposure to vibration, affecting the fingers, hands, and forearms. It occurs in workers who regularly use vibrating tools such as jackhammers, power chain saws, riveters, etc. Symptoms include episodic finger blanching, NUMBNESS, tingling, and loss of nerve sensitivity.
Functional Residual Capacity
Venous Insufficiency
Vascular Capacitance
Postphlebitic Syndrome
A condition characterized by a chronically swollen limb, often a leg with stasis dermatitis and ulcerations. This syndrome can appear soon after phlebitis or years later. Postphlebitic syndrome is the result of damaged or incompetent venous valves in the limbs. Distended, tortuous VARICOSE VEINS are usually present. Leg pain may occur after long period of standing.
Acetylcholine
Respiratory Function Tests
Blood Flow Velocity
Endothelium, Vascular
Phlebography
Brachial Artery
Hemodynamics
Fluid Shifts
Translocation of body fluids from one compartment to another, such as from the vascular to the interstitial compartments. Fluid shifts are associated with profound changes in vascular permeability and WATER-ELECTROLYTE IMBALANCE. The shift can also be from the lower body to the upper body as in conditions of weightlessness.
Vasoconstriction
Air
Popliteal Vein
Residual Volume
Lung
Lower Body Negative Pressure
Cross-Over Studies
Studies comparing two or more treatments or interventions in which the subjects or patients, upon completion of the course of one treatment, are switched to another. In the case of two treatments, A and B, half the subjects are randomly allocated to receive these in the order A, B and half to receive them in the order B, A. A criticism of this design is that effects of the first treatment may carry over into the period when the second is given. (Last, A Dictionary of Epidemiology, 2d ed)
Helium
Helium. A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. (Dorland, 27th ed)
Femoral Vein
Vasomotor System
Hypercapnia
Raynaud Disease
Nitric Oxide
A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.
Nitroglycerin
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Compliance
Bronchoconstriction
Dose-Response Relationship, Drug
Central Venous Pressure
Varicose Ulcer
Skin breakdown or ulceration caused by VARICOSE VEINS in which there is too much hydrostatic pressure in the superficial venous system of the leg. Venous hypertension leads to increased pressure in the capillary bed, transudation of fluid and proteins into the interstitial space, altering blood flow and supply of nutrients to the skin and subcutaneous tissues, and eventual ulceration.
Analysis of Variance
Gravity Suits
Double-layered inflatable suits which, when inflated, exert pressure on the lower part of the wearer's body. The suits are used to improve or stabilize the circulatory state, i.e., to prevent hypotension, control hemorrhage, and regulate blood pressure. The suits are also used by pilots under positive acceleration.
Sympathetic Nervous System
The thoracolumbar division of the autonomic nervous system. Sympathetic preganglionic fibers originate in neurons of the intermediolateral column of the spinal cord and project to the paravertebral and prevertebral ganglia, which in turn project to target organs. The sympathetic nervous system mediates the body's response to stressful situations, i.e., the fight or flight reactions. It often acts reciprocally to the parasympathetic system.
Double-Blind Method
Reference Values
Respiratory Rate
Photoplethysmography
Forced Expiratory Volume
Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity.
Tilt-Table Test
Diaphragm
Body Composition
Hypertension
Tourniquets
Forced Expiratory Flow Rates
Ultrasonography, Doppler, Duplex
Norepinephrine
Precursor of epinephrine that is secreted by the adrenal medulla and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers and of the diffuse projection system in the brain arising from the locus ceruleus. It is also found in plants and is used pharmacologically as a sympathomimetic.
Iliac Vein
Albuterol
Vital Capacity
Bronchodilator Agents
Nitric Oxide Synthase
Bradykinin
A nonapeptide messenger that is enzymatically produced from KALLIDIN in the blood where it is a potent but short-lived agent of arteriolar dilation and increased capillary permeability. Bradykinin is also released from MAST CELLS during asthma attacks, from gut walls as a gastrointestinal vasodilator, from damaged tissues as a pain signal, and may be a neurotransmitter.
Exercise
Bronchial Hyperreactivity
Tendency of the smooth muscle of the tracheobronchial tree to contract more intensely in response to a given stimulus than it does in the response seen in normal individuals. This condition is present in virtually all symptomatic patients with asthma. The most prominent manifestation of this smooth muscle contraction is a decrease in airway caliber that can be readily measured in the pulmonary function laboratory.
Enzyme Inhibitors
Bronchial Provocation Tests
Lung Compliance
The capability of the LUNGS to distend under pressure as measured by pulmonary volume change per unit pressure change. While not a complete description of the pressure-volume properties of the lung, it is nevertheless useful in practice as a measure of the comparative stiffness of the lung. (From Best & Taylor's Physiological Basis of Medical Practice, 12th ed, p562)
Receptor, Endothelin A
Cardiography, Impedance
A type of impedance plethysmography in which bioelectrical impedance is measured between electrodes positioned around the neck and around the lower thorax. It is used principally to calculate stroke volume and cardiac volume, but it is also related to myocardial contractility, thoracic fluid content, and circulation to the extremities.
Abdominal Muscles
Sensitivity and Specificity
Hypovolemia
Peripheral hemodynamics evaluated by acceleration plethysmography in workers exposed to lead. (1/1109)
To clarify the effect of lead exposure on peripheral hemodynamics, acceleration plethysmography (APG) was performed for 48 male subjects occupationally exposed to lead (exposure group) and 43 male subjects with no history of occupational exposure to lead (control group). In the exposure group, the blood lead concentration (Pb-B) was also measured. Each APG parameter was assessed by comparing measured data with the standard aging curves. A significant negative correlation was obtained between the parameter--b/a and Pb-B. The exposure group showed significantly lower values of parameters--b/a (p < 0.01) and d/a (p < 0.05) than the control group. The parameter--b/a in the exposure group dose-dependently decreased with increases in length of working career (duration of exposure to lead) and Pb-B. The parameter--b/a significantly (p < 0.05) decreased in subjects with working careers of 5 years or more and in subjects whose Pb-B was 40 micrograms/100 ml or more. These results suggest that lead exposure affects peripheral hemodynamics as evaluated by APG. (+info)Effect of intensive therapy for heart failure on the vasodilator response to exercise. (2/1109)
OBJECTIVES: The purpose of the study was to evaluate the lower extremity vascular responsiveness to metabolic stimuli in patients with heart failure and to determine whether these responses improve acutely after intensive medical therapy. BACKGROUND: Metabolic regulation of vascular tone is an important determinant of blood flow, and may be abnormal in heart failure. METHODS: The leg blood flow responses were measured in 11 patients with nonedematous class III-IV heart failure before and after inpatient medical therapy and in 10 normal subjects. Venous occlusion plethysmography was used to measure peak blood flow and total hyperemia in the calf after arterial occlusion and also after isotonic ankle exercise. Measurements were repeated following short-term inpatient treatment with vasodilators and diuretics administered to decrease right atrial pressure (18+/-2 to 7+/-1 mm Hg), pulmonary wedge pressure (32+/-3 to 15+/-2 mm Hg), and systemic vascular resistance (1581+/-200 to 938+/-63 dynes.s.cm(-5), all p < 0.02). RESULTS: Leg blood flow at rest, after exercise, and during reactive hyperemia was less in heart failure patients than in control subjects. Resting leg blood flow did not increase significantly after medical therapy, but peak flow after the high level of exercise increased by 59% (p = 0.009). Total hyperemic volume in the recovery period increased by 73% (p = 0.03). Similarly, the peak leg blood flow response to ischemia increased by 88% (p = 0.04), whereas hyperemic volume rose by 98% (p = 0.1). CONCLUSIONS: The calf blood flow responses to metabolic stimuli are blunted in patients with severe heart failure, and improve rapidly with intensive medical therapy. (+info)Endothelium-dependent relaxation by acetylcholine is impaired in hypertriglyceridemic humans with normal levels of plasma LDL cholesterol. (3/1109)
OBJECTIVES: Patients with high triglyceride (of which very low density lipoproteins [VLDL] are the main carriers), but with normal low density lipoprotein (LDL) cholesterol levels, were examined for in vivo endothelium function status. BACKGROUND: Very low density lipoproteins inhibit endothelium-dependent, but not -independent, vasorelaxation in vitro. METHODS: Three groups were studied: 1) healthy volunteers (n = 10; triglyceride 1.24+/-0.14 mmol/liter, LDL cholesterol 2.99+/-0.24 mmol/liter); 2) hypertriglyceridemic (n = 11; triglyceride 6.97+/-1.19 mmol/liter, LDL cholesterol 2.17+/-0.2 mmol/liter, p < 0.05); and 3) hypercholesterolemic (n = 10; triglyceride 2.25+/-0.29 mmol/liter, LDL cholesterol 5.61+/-0.54 mmol/liter; p < 0.05) patients. Vasoactive responses to acetylcholine, sodium nitroprusside, noradrenaline, N(G)-monomethyl-L-arginine and postischemic hyperemia were determined using forearm venous occlusion plethysmography. RESULTS: Responses to acetylcholine (37 microg/min) were significantly dampened both in hypercholesterolemic (% increase in forearm blood flow: 268.2+/-62) and hypertriglyceridemic patients (232.6+/-45.2) when compared with controls (547.8+/-108.9; ANOVA p < 0.05). Responses to sodium nitroprusside (at 1.6 microg/min: controls vs. hypercholesterolemics vs. hypertriglyceridemic: 168.7+/- 25.1 vs. 140.6+/-38.9 vs. 178.5+/-54.5% increase), noradrenaline, N(G)-monomethyl-L-arginine and postischemic hyperemic responses were not different among the groups examined. CONCLUSIONS: Acetylcholine responses are impaired in patients with pathophysiologic levels of plasma triglycerides but normal plasma levels of LDL cholesterol. The impairment observed was comparable to that obtained in hypercholesterolemic patients. We conclude that impaired responses to acetylcholine normally associated with hypercholesterolemia also occur in hypertriglyceridemia. These findings identify a potential mechanism by which high plasma triglyceride levels may be atherogenic independent of LDL cholesterol levels. (+info)Endothelial dysfunction, impaired endogenous fibrinolysis, and cigarette smoking: a mechanism for arterial thrombosis and myocardial infarction. (4/1109)
BACKGROUND: Effective endogenous fibrinolysis requires rapid release of tissue plasminogen activator (tPA) from the vascular endothelium. Smoking is a known risk factor for arterial thrombosis and myocardial infarction, and it causes endothelial dysfunction. We therefore examined the effects of cigarette smoking on substance P-induced tPA release in vivo in humans. METHODS AND RESULTS: Blood flow and plasma fibrinolytic factors were measured in both forearms of 12 smokers and 12 age- and sex-matched nonsmokers who received unilateral brachial artery infusions of substance P (2 to 8 pmol/min). In both smokers and nonsmokers, substance P caused dose-dependent increases in blood flow and local release of plasma tPA antigen and activity (P<0.001 for all) but had no effect on the local release of plasminogen activator inhibitor type 1. Compared with nonsmokers, increases in forearm blood flow (P=0.03) and release of tPA antigen (P=0.04) and activity (P<0.001) caused by substance P were reduced in smokers. The area under the curve for release of tPA antigen and activity decreased by 51% and 53%, respectively. CONCLUSIONS: Cigarette smoking causes marked inhibition of substance P-induced tPA release in vivo in humans. This provides an important mechanism whereby endothelial dysfunction may increase the risk of atherothrombosis through a reduction in the acute fibrinolytic capacity. (+info)Comparison of two new methods for the measurement of lung volumes with two standard methods. (5/1109)
BACKGROUND: The two most commonly used methods for the measurement of lung volumes are helium dilution and body plethysmography. Two methods have been developed which are both easier and less time consuming to perform. Mathematical modelling uses complex calculations from the flow-volume loop to derive total lung capacity (TLC), and the nitrogen balance technique uses nitrogen from the atmosphere to calculate lung volume in a similar way to helium dilution. This study was designed to compare the two new methods with the two standard methods. METHODS: Sixty one subjects were studied, 23 with normal lung function, 17 with restrictive airway disease, and 21 with obstructive ventilatory defects. Each subject underwent repeated measurements of TLC by each of the four methods in random order. Reproducible values were obtained for each method according to BTS/ARTP guidelines. Bland-Altman plots were constructed for comparisons between the methods and paired t tests were used to assess differences in means. RESULTS: Bland-Altman plots showed that the differences between body plethysmography and helium dilution fell into clinically acceptable ranges (agreement limits +/-0.9 l). The agreement between mathematical modelling or the nitrogen balance technique and helium dilution or body plethysmography was poor (+/-1.8-3.4 l), especially for subjects with airflow obstruction. CONCLUSIONS: Neither of the new methods agrees sufficiently with standard methods to be useful in a clinical setting. (+info)Physiologic basis and interpretation of common indices of respiratory mechanical function. (6/1109)
Tests of pulmonary mechanical function may be used in determining the prominent site of pulmonary reaction to intervention. Responses may be localized from a knowledge of changes in lung resistance and compliance. A peripheral airway or parenchymal response is characterized by a decrease in lung compliance. A central airway reaction is characterized by an increase in pulmonary resistance. In mixed reactions both parameters may change. In this communication some of the physiologic determinants of pulmonary resistance and compliance are discussed and examples of localized responses given. (+info)Contribution of nitric oxide to beta2-adrenoceptor mediated vasodilatation in human forearm arterial vasculature. (7/1109)
AIMS: beta2-adrenoceptor agonists are generally considered to produce endothelium independent vasodilatation through adenylate cyclase. We determined whether nitric oxide contributes to beta2-adrenoceptor vasodilatation in human arterial vasculature. METHODS: Forearm blood flow responses to brachial intra-arterial infusions of ritodrine (2.5-50 microg min(-1)), a selective beta2-adrenoceptor agonist, were determined in 24 healthy, normotensive subjects (mean age 22 years, 5F) on two occasions with initial and concomitant administration of L-NMMA (800 microg min(-1)), an NO synthase inhibitor, or noradrenaline (5-30 ng min(-1)), a control constrictor not affecting basal NO activity. Responses to the endothelium dependent vasodilator scrotonin (n = 6) and an endothelium independent vasodilator GTN (n = 9) were also determined. RESULTS: Maximal dilatation to ritodrine during L-NMMA infusion (310+/-32%; mean+/-s.e.mean) was reduced compared to that during noradrenaline infusion (417+/-41%, P<0.05), as were summary responses (1023+/-101 vs 1415+/-130; P<0.05). Responses to GTN were unaffected by L-NMMA compared to noradrenaline; max 177+/-26 vs 169+/-20%, 95% CI for difference -33,48; P=0.68; summary response 361+/-51 vs 396+/-37, 95% CI -142,71; P=0.46. Dilator responses to serotonin were reduced by L-NMMA; max 64+/-20 vs 163+/-26%, P<0.01; summary response 129+/-36 vs 293+/-60; P<0.05) and to a greater extent than ritodrine (58+/-7 vs 25+/-14%, P<0.05). CONCLUSIONS: beta2-adrenoceptor mediated vasodilatation in the human forearm has an NO mediated component. The underlying mechanism for this effect is unclear, but flow mediated vasodilatation is unlikely to be responsible. (+info)Relationship between left ventricular mass and endothelium-dependent vasodilation in never-treated hypertensive patients. (8/1109)
BACKGROUND: Hypertensive patients are characterized by development of both left ventricular hypertrophy (LVH) and endothelial dysfunction METHODS AND RESULTS: We enrolled 65 never-treated hypertensive patients (36 men and 29 women aged 45.6+/-6.0 years) to assess the possible relationship between echocardiographic left ventricular mass (LVM) and endothelium-dependent vasodilation. Left ventricular measurements were performed at end diastole and end systole according to the recommendations of the American Society of Echocardiography and the Penn Convention. LVM was calculated with the Devereux formula and indexed by body surface area and height raised to the 2.7th power. The endothelial function was tested as responses of forearm vasculature to acetylcholine (ACh), an endothelium-dependent vasodilator (7.5, 15, and 30 microg. mL-1. min-1, each for 5 minutes), and sodium nitroprusside (SNP), an endothelium-independent vasodilator (0.8, 1.6, and 3.2 microg. mL-1. min-1, each for 5 minutes). Drugs were infused into the brachial artery, and forearm blood flow (FBF) was measured by strain-gauge plethysmography. A negative significant relationship between indexed LVM and peak of increase in FBF was found during ACh infusions (r=-0. 554; P<0.0001). In addition, hypertrophic patients had a significantly lower responsive to ACh than patients without LVH (the peak increase in FBF was 9.9+/-3.7 versus 16.1+/-8.1 mL per 100 mL of tissue per minute; P<0.0001). No significant correlation was observed between LVM and FBF during SNP infusion. CONCLUSIONS: Our data provide the first evidence that echocardiographic LVM in hypertensive patients is inversely related to FBF responses to the endothelium-dependent vasodilating agent ACh, but it is likely that both endothelium and LVM are damaged by hypertension. (+info)
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Body fat percentage
Whole-body air displacement plethysmography[edit]. Main article: Whole-body air displacement plethysmography ... Air-displacement plethysmography offers several advantages over established reference methods, including a quick, comfortable, ... Fields DA, Goran MI, McCrory MA (March 2002). "Body-composition assessment via air-displacement plethysmography in adults and ... Whole-body air displacement plethysmography (ADP) is a recognised and scientifically validated densitometric method to measure ...
Venous translucence
Air plethysmography and the effect of elastic compression on the venous haemodynamics of the leg. J Vasc Surg 1987;5:148-159. ... Air plethysmography. in: Raju S, Villavicencio JL., Surgical management of venous disease. Cidade: Willians & Wilkins; 1997:93 ... Combining segmental systolic pressure and plethysmography to diagnose arterial occlusive disease of the legs. Am J Surg 1979; ...
Impedance cardiography
Impedance Plethysmography". www.bem.fi. Kubicek W.G., Witsoe, D.A., Patterson, R.P., Mosharrata, M.A., Karnegis, J.N., From, A. ... Impedance cardiography (ICG), also referred to as electrical impedance plethysmography (EIP) or Thoracic Electrical ...
Latent homosexuality
Three tests were conducted using penile plethysmography. While there was no difference in response when the men were exposed to ...
Paul Bert
Jacquemin, C; Varène P (December 1968). "Paul Bert and body plethysmography (1868-1968)". La Presse Médicale. 76 (50): 2403-4. ...
Lung
"Body plethysmography - Its principles and clinical use". Respiratory Medicine. 105 (7): 959-971. doi:10.1016/j.rmed.2011.02.006 ...
Airway resistance
... can be measured using plethysmography. Analogously to Ohm's Law: R A W = Δ P V ˙ {\displaystyle R_{AW}={\frac ...
Spirometry
Other complementary lung functions tests include plethysmography and nitrogen washout. The most common parameters measured in ...
Quantium Medical Cardiac Output
The impedance plethysmography allows determining changes in volume of the body tissues based on the measurement of the electric ... "Estimation of Cardiac Output by using surface electrodes for measuring the impedance plethysmography" (PDF). Navat. Gabarrón, ... "Non-invasive Cardiac Output measurement by impedance plethysmography under general anaesthesia". Eur. Soc. Anaesthesiol.: 4-6. ...
Vocal cord dysfunction
... the utility of spirometry and plethysmography". Chest. American College of Chest Physicians. 122 (6): 2246-9. doi:10.1378/chest ...
Thromboangiitis obliterans
Distal plethysmography also yields useful information about circulatory status in digits. To rule out other forms of vasculitis ...
Bioelectrical impedance analysis
"Accuracy of Consumer Grade Bioelectrical Impedance Analysis Devices Compared to Air Displacement Plethysmography". Int J Exerc ...
Claire Wainwright
Murphy AJ, Buntain HM, Wong JC, Greer RM, Wainwright CE, Davies PS (July 2004). "The Use of Air Displacement Plethysmography in ...
Sexual arousal
This measurement of blood flow to the male genitals is known as penile plethysmography. This is commonly measured using a ...
Andrew Nicolaides
"Air-Plethysmography and the effect of elastic compression on venous hemodynamics of the leg.", Journal of Vascular Surgery, ...
Antonio Pedotti
"Measurement of chest wall volume changes by optoelectronic plethysmography (OEP) in newborns during CPAP". re.public.polimi.it ...
Deep vein thrombosis
Diagnoses were commonly performed by impedance plethysmography in the 1970s and 1980s, but ultrasound, particularly after ... Yet, in the mid 1990s, contrast venography and impedance plethysmography were still described as common. Multiple ...
Paul Fedoroff
"Changes in sexual arousal as measured by penile plethysmography in men with pedophilic sexual interest". Journal of Sexual ... found that treatment has been effective in changing sexual arousal towards children as measured by the penile plethysmography ...
Polysomnography
The movement of the belts is typically measured with piezoelectric sensors or respiratory inductance plethysmography. This ...
Royal Ottawa Mental Health Centre
"Changes in Sexual Arousal as Measured by Penile Plethysmography in Men with Pedophilic Sexual Interest". J Sex Med. 11: 1221-9 ...
Plethysmograph
Optoelectronic plethysmography Photoplethysmograph Respiratory inductance plethysmography πληθυσμός, γράφειν. Liddell, Henry ... In water plethysmography an extremity, e.g. an arm, is enclosed in a water-filled chamber where volume changes can be detected ... Air plethysmography uses a similar principle but based on an air-filled long cuff, which is more convenient but less accurate. ... With cabinless plethysmography, the patient is seated next to a desktop testing device and inserts the mouthpiece into his/her ...
Body composition
The technique uses air as opposed to water and is known as air displacement plethysmography (ADP). Subjects enter a sealed ...
History of continuous noninvasive arterial pressure
Noninvasive measurement of arterial blood pressure and elastic properties using photoelectric plethysmography technique. ...
Workplace health surveillance
Plethysmography measures lung volume by having the subject perform breathing tests inside of an air tight box. Flow rates can ...
Idiopathic pulmonary fibrosis
Measurement of static lung volumes using body plethysmography or other techniques typically reveals reduced lung volumes ( ... body plethysmography), diffusion capacity testing, chest X-rays, 6MWT, assessment of dyspnea, quality of life, oxygen ...
May-Thurner syndrome
Functional testing such as duplex ultrasound, venous and interstitial pressure measurement and plethysmography may sometimes be ...
Chronic venous insufficiency
Venous plethysmography can assess for reflux and muscle pump dysfunction but the test is laborious and rarely done. The venous ...
Respiratory tract infection
Methods such as gas dilution techniques and plethysmography help determine the functional residual capacity and total lung ...
Masimo
"Continuous hemoglobin and plethysmography variability index monitoring can modify blood transfusion practice and is associated ...
Air displacement plethysmography - Wikipedia
Air displacement plethysmography or ADP (also known as whole-body air displacement plethysmography) is a recognized and ... The principles of plethysmography were first applied to the measurement of the body volume and composition of infants in the ... With air-displacement plethysmography, the volume of an object is measured indirectly by determining the volume of air it ... Air-displacement plethysmography offers several advantages over established reference methods, including a quick, comfortable, ...
Plethysmography: MedlinePlus Medical Encyclopedia
Plethysmography is used to measure changes in volume in different parts of the body. The test may be done to check for blood ... Plethysmography is used to measure changes in volume in different parts of the body. The test may be done to check for blood ... Respiratory inductance plethysmography; Penile pulse volume recording; Pulse volume recordings; Segmental pulse volume ...
Category:Plethysmography - Wikimedia Commons
Media in category "Plethysmography". The following 3 files are in this category, out of 3 total. ... Adult body composition through air displacement plethysmography.jpg 2,872 × 2,355; 448 KB. ... Retrieved from "https://commons.wikimedia.org/w/index.php?title=Category:Plethysmography&oldid=307475212" ...
Limb plethysmography: MedlinePlus Medical Encyclopedia
Limb plethysmography is a test that compares blood pressure in the legs and arms. ... Plethysmography may be done for very ill people who cannot travel to the arteriography lab. This test can be used to screen for ... Limb plethysmography is a test that compares blood pressure in the legs and arms. ...
Optoelectronic plethysmography - Wikipedia
Optoelectronic plethysmography (OEP) is a method to evaluate ventilation through an external measurement of the chest wall ... Optoelectronic plethysmography can be used following different measurement protocols, specifically developed for different ... Aliverti A, Dellacá R, Pelosi P, Chiumello D, Pedotti A, Gattinoni L (2000). "Optoelectronic plethysmography in intensive care ... 89 markers are arranged on the thoraco-abdominal surface.Optoelectronic plethysmography can be used also in supine and prone ...
Penile plethysmography - Wikipedia
... the argument for penile plethysmography being a more reliable gauge of sexual arousal than vaginal plethysmography is still ... In fact, penile plethysmography has received a mixed reception in Quebec courts: Protection de la jeunesse - 539, [1992] R.J.Q ... Penile plethysmography (PPG) or phallometry is measurement of bloodflow to the penis, typically used as a proxy for measurement ... One such criticism is that while penile plethysmography is said to be important for being more objective than a test subjects ...
Venous Plethysmography Result - Varicose Veins - MedHelp
Venous Plethysmography Result Heiferly I am a 33 y.o. female with generalized dysautonomia and severe gastroparesis. I have ... However, the exercise venous plethysmography revealed reduced post-exercise refill volume in my left leg, reduced ejection ... plethysmography) study was ordered and performed. Results of the venous outflow and dependent venous refilling segments were ...
Sensing blood alcohol concentration using photo-plethysmography: Ingenta Connect
NIOSHTIC-2 Publications Search - 00145421 - Vibration syndrome in chipping and grinding workers. Photocell plethysmography.
The use of photocell plethysmographic instruments to test for Raynauds or vibration syndrome in workers using pneumatic chisels was investigated. The hand was placed in ice water to restrict blood flow. Recovery of vascular flow to the hand being examined was measured by placing a finger in a beam of light and measuring changes in light transmission (changes in tissue transparency) with a photocel
Plethysmography
BIOPAC data acquisition systems and amplifiers provide a range of solutions for plethysmography. Use the PPG100C Pulse ... Monitor vaginal plethysmography (TCIPPG1), penile plethysmography (TCI111/112), temperature, electrodermal activity (GSR), ... Record and analyze plethysmography data from a variety of body locations. Record pulse rate from the fingers, ears or toes for ... Hardware Packages , Plethysmography. Hardware Bundles are complete solutions for the specified application. Choose your ...
Limb plethysmography | Health Encyclopedia | FloridaHealthFinder.gov
Limb plethysmography. Definition. Limb plethysmography is a test that compares blood pressure in the legs and arms. ... Plethysmography - limb. How the Test is Performed. This test may be done in the health care providers office or in a hospital ... Plethysmography may be done for very ill people who cannot travel to the arteriography lab. This test can be used to screen for ...
Pulse and Plethysmography | ADInstruments
Pulse Oximetry and Plethysmography are non-invasive circulatory assessment methods used in blood flow monitoring, and both ... Pulse and Plethysmography. Pulse Oximetry and Plethysmography are non-invasive circulatory assessment methods used in blood ... Additional acquisition and analysis features and add-ons to support your Pulse and Plethysmography studies:. Comments and ... Explore Pulse and Plethysmography Data in LabChart Reader. LabChart Reader is a free application for conducting limited ...
Comparison Between the Respiratory Inductance Plethysmography Signal Derivative and the Airflow Signal | SpringerLink
The use of respiratory inductance plethysmography (RIP) for measurement of breathing is appealing not only because of its ... The use of respiratory inductance plethysmography (RIP) for measurement of breathing is appealing not only because of its ... Detection of inspiratory flow limitation during sleep by computer assisted respiratory inductive plethysmography. Eur. Respir. ... Eberhard A., Calabrese P., Baconnier P., Benchetrit G. (2001) Comparison Between the Respiratory Inductance Plethysmography ...
Validity of thoracic respiratory inductive plethysmography in high body mass index subjects. - PubMed - NCBI
An investigation of response interference in penile plethysmography - University of Minnesota Press
Doppler Sonography, MR Venography, Plethysmography for the Diagnosis of CCSVI - Full Text View - ClinicalTrials.gov
Other: Air-plethysmography of the neck Air-plethysmography of the neck. Other: Catheter venography of internal jugular veins ... Doppler Sonography, MR Venography, Plethysmography for the Diagnosis of CCSVI. The safety and scientific validity of this study ... This study is aimed at evaluation of diagnostic value of Doppler sonography, MR venography and air-plethysmography for the ... Positive and negative predictive value of Doppler sonography, MR venography and air-plethysmography [ Time Frame: All non- ...
Lung plethysmography
... is a test used to measure how much air you can hold in your lungs. Alternative Names: Pulmonary ... Pulmonary plethysmography; Static lung volume determination; Whole-body plethysmography. How the Test is Performed. You will ... Lung plethysmography will not find the cause of the problem. But it helps the doctor narrow down the list of possible problems. ... plethysmography. is a test used to measure how much air you can hold in your lungs. ...
Plethysmography | Health Information Resource Center | Health Information | Main
Impedance Plethysmography and DVT Diagnosis | Annals of Internal Medicine | American College of Physicians
Venous occlusion plethysmography | definition of venous occlusion plethysmography by Medical dictionary
What is venous occlusion plethysmography? Meaning of venous occlusion plethysmography medical term. What does venous occlusion ... Looking for online definition of venous occlusion plethysmography in the Medical Dictionary? venous occlusion plethysmography ... venous occlusion plethysmography. ve·nous oc·clu·sion pleth·ys·mog·ra·phy. measurement of the rate of arterial inflow into an ... Venous occlusion plethysmography was used to assess the effectiveness of the OHT in reducing or stopping blood flow to the leg ...
Estimation of tidal ventilation in preterm and term newborn infants using electromagnetic inductance plethysmography. - PubMed...
Deficits in olfactory sensitivity in a mouse model of Parkinson's disease revealed by plethysmography of odor-evoked sniffing |...
... which was observed with the semi-automated plethysmography apparatus, but not a buried pellet test. In future studies, this ... Deficits in olfactory sensitivity in a mouse model of Parkinsons disease revealed by plethysmography of odor-evoked sniffing. ... To measure sniffing, we used unrestrained whole-body plethysmography to monitor respiration of the mice as they freely explored ... which was observed with the semi-automated plethysmography apparatus, but not a buried pellet test. In future studies, this ...
Tidal breathing patterns derived from structured light plethysmography | MDER
This feasibility study examined whether structured light plethysmography (SLP) - a noncontact, light-based technique - could ... Tidal breathing patterns derived from structured light plethysmography in COPD patients compared with healthy subjects Shayan ... Tidal breathing patterns derived from structured light plethysmography in COPD patients compared with healthy subjects. ... This feasibility study examined whether structured light plethysmography (SLP) - a noncontact, light-based technique - could ...
Impedance plethysmography | definition of impedance plethysmography by Medical dictionary
What is impedance plethysmography? Meaning of impedance plethysmography medical term. What does impedance plethysmography mean? ... Looking for online definition of impedance plethysmography in the Medical Dictionary? impedance plethysmography explanation ... Plethysmography. Synonym/acronym: Impedance plethysmography, PVR. Common use. To measure changes in blood vessel size or ... impedance plethysmography. Also found in: Dictionary, Acronyms, Encyclopedia.. Related to impedance plethysmography: Impedance ...
Segmental volume plethysmography in the diagnosis of lower extremity arterial occlusive disease.
Sensors | Free Full-Text | Evaluation of Electrical and Optical Plethysmography Sensors for Noninvasive Monitoring of...
Both sensors demonstrated sensitivity to changes in pulse volume (plethysmography). The electrical sensor produced a signal ... Keywords: hemoglobin; capacitance; plethysmography; noninvasive hemoglobin; capacitance; plethysmography; noninvasive This is ... Evaluation of Electrical and Optical Plethysmography Sensors for Noninvasive Monitoring of Hemoglobin Concentration Justin P. ... Phillips, J.P.; Hickey, M.; Kyriacou, P.A. Evaluation of Electrical and Optical Plethysmography Sensors for Noninvasive ...
Total lung capacity by plethysmography and high-resolution computed to | COPD
TLC by plethysmography and HRCT both demonstrated significant inverse correlations with diffusion impairment. The absolute ... TLC was obtained by plethysmography as per American Thoracic Society/European Respiratory Society standards and by HRCT using ... Gas trapping (RV% and FRC%) independently predicted the difference in TLC between plethysmography and HRCT.Conclusion: In COPD ... Gas trapping independently predicts patients for whom TLC by plethysmography differs significantly from HRCT.Keywords: lung ...
Effect of scalp and facial hair on air displacement plethysmography estimates of percentage of body fat
Impedance PlethysmographyInductance plethysmographyInductive plethysmographyOcclusionPhoto-plethysmographyOptoelectronic plethysmographyMeasurementBarometric PlethysmographyMeasured by body plethysmographyPenilePulmonary FuncMeasurementsDiagnosisLimbBody compositionAssessmentMethodsThoracicNoninvasiveTidalSpirometryAirwayAssessLungsSensitivityComputed tomographyEvaluateDetectionArteriographyVolumeLung functionStrain gaugeBloodDiagnostic
Impedance Plethysmography11
- Raskob GE, Pineo GF, Hull RD. Impedance Plethysmography and DVT Diagnosis. (annals.org)
- Impedance plethysmography, PVR. (thefreedictionary.com)
- Impedance plethysmography is widely used to detect acute deep vein thrombosis (DVT) of the leg, but it can also be used in the arm, abdomen, neck, or thorax. (thefreedictionary.com)
- Elbaum D, Wolfson P, Hedlund D, Smith CR, Braunstein D, Haspel L, Litchfield R, Sallen M, Siegel M. Noninvasive detection of thrombosis of the deep veins of the legs: comparison of Doppler ultrasonography and impedance plethysmography with venography. (jaoa.org)
- Fibrin degradation products and impedance plethysmography. (harvard.edu)
- Foti ME, Gurewich V. Fibrin degradation products and impedance plethysmography. (harvard.edu)
- AIM: The aim of the study was to evaluate changes in the peripheral circulation in the calf, induced by controlled physical exercise performed within a standard rehabilitation procedure in patients with acute coronary disease, with the use of impedance plethysmography. (minervamedica.it)
- All the patients underwent impedance plethysmography test before and after the training session in order to evaluate peripheral circulation in lower limbs. (minervamedica.it)
- Impedance plethysmography allows for non-invasive monitoring of local blood flow and is a precise and repeated method of evaluating peripheral circulation in patients during cardiac rehabilitation. (minervamedica.it)
- However, no such study exists for the Impedance Plethysmography (IP) signal. (vcu.edu)
- IMSEAR at SEARO: Impedance plethysmography in arterial occlusive disease: correlation with arteriography. (who.int)
Inductance plethysmography7
- The use of respiratory inductance plethysmography (RIP) for measurement of breathing is appealing not only because of its noninvasive nature but also because it provides rib cage and abdomen cross sectional area changes. (springer.com)
- Eberhard A., Calabrese P., Baconnier P., Benchetrit G. (2001) Comparison Between the Respiratory Inductance Plethysmography Signal Derivative and the Airflow Signal. (springer.com)
- Estimation of tidal ventilation in preterm and term newborn infants using electromagnetic inductance plethysmography. (nih.gov)
- We conclude that uncalibrated respiratory inductance plethysmography can measure tidal breathing parameters as reliably as a facemask-pneumotachograph system in young asthmatic children, and is better tolerated than the pneumotachograph system. (nih.gov)
- In this paper, the development and testing of a new noninvasive PF instrument, pneuRIP TM , which utilizes respiratory inductance plethysmography (RIP) are discussed. (asme.org)
- Respiratory inductance plethysmography: calibration techniques, their validation and the effects of posture. (ox.ac.uk)
- Respiratory inductance plethysmography (RIP) is used to measure ventilation from two measurements of body surface movements (rib-cage and abdomen) via the application of volume-motion (V-M) coefficients. (ox.ac.uk)
Inductive plethysmography7
- Detection of inspiratory flow limitation during sleep by computer assisted respiratory inductive plethysmography. (springer.com)
- Validity of thoracic respiratory inductive plethysmography in high body mass index subjects. (nih.gov)
- We aim to evaluate thoracic respiratory inductive plethysmography (RIP) in high body mass index (BMI) subjects with a pneumotachometer (PT) as a reference. (nih.gov)
- Tidal ventilation and breathing pattern were measured using a new device, FloRight, which uses electromagnetic inductive plethysmography,and compared simultaneously with pneumotachography in 43 infants either receiving no respiratory support or continuous positive airway pressure (CPAP).Twenty-three infants were receiving CPAP (gestational age 28 ± 2 weeks, mean ± SD) and 20 were breathing spontaneously (gestational age 34 ± 4 weeks). (nih.gov)
- Until recently the respiratory inductive plethysmography used to evaluate the effects of incentive spirometry on chest wall mechanics presented limitations, which may explain why the impact of VIS and FIS remains poorly known. (rcjournal.com)
- 12 In addition, thoracoabdominal mechanics were measured using respiratory inductive plethysmography, a technique that evaluates pulmonary volume using a 2-compartment analysis that does not have an accurate calibration method. (rcjournal.com)
- The abdominal and thoracic calibrated respiratory inductive plethysmography (RIP) sensors integrated in the LifeShirt system might be an adequate alternative for detecting speech. (unibas.ch)
Occlusion10
- The study team evaluated the muscle MSNA by microneurography, forearm blood flow by venous occlusion plethysmography , functional capacity by cardiopulmonary exercise test and plasmatic cathecolamine level. (thefreedictionary.com)
- Venous occlusion plethysmography and radionuclide techniques are the most commonly used invasive methods that allow a quantitative description of local and regional blood flow (De Graaff et al. (thefreedictionary.com)
- Venous occlusion plethysmography was used to assess the effectiveness of the OHT in reducing or stopping blood flow to the leg and arm. (thefreedictionary.com)
- The aim of this study was to assess whether venous occlusion plethysmography can be used to identify venous obstruction and predict clinical success of stenting. (ovid.com)
- Receiver operated characteristic curves were used to determine the ability of venous occlusion plethysmography to discriminate between the presence and absence of obstruction, measured by duplex ultrasound and magnetic resonance venography, and to discriminate between successful and non-successful stenting, measured by VEINES-QOL/Sym. (ovid.com)
- Venous occlusion plethysmography cannot be used to identify venous obstruction proximal to the femoral confluence or to distinguish which patients will benefit from treatment. (ovid.com)
- The AI6 Arterial Inflow System is an integrated system that will perform venous occlusion plethysmography just the way you want it. (ophthalmologymanagement.com)
- The common techniques used to asse ss cutaneous microvascular function in vivo include capillaroscopy, venous occlusion plethysmography, and laser-Doppler instruments (laser-Doppler fluximetry and laser-Doppler imaging). (iospress.com)
- and then to compare the technique with the "gold standard" of forearm venous occlusion plethysmography. (ahajournals.org)
- Methods: Leg blood flow measured by venous occlusion plethysmography was compared with skeletal muscle blood flow by ultrafast computed tomography. (elsevier.com)
Photo-plethysmography3
- 62/556,260 filed September 08, 2017, titled "Low NOISE FRONT-END FOR A HEART RATE MONITOR USING PHOTO-PLETHYSMOGRAPHY," and is incorporated by reference in its entirety. (wipo.int)
- The EC6 provides researchers with the ability to build to suit the instrumentation they need for using either strain gauge or photo plethysmography for arterial inflow, venous testing and a wide variety of measurement applications. (hokansonvascular.com)
- The aim of this study was to establish novel photo-plethysmography (PPG)-based ABI assessments in an epidemiologic context and to compare its results with those of Doppler. (biomedcentral.com)
Optoelectronic plethysmography7
- Optoelectronic plethysmography (OEP) is a method to evaluate ventilation through an external measurement of the chest wall surface motion. (wikipedia.org)
- Optoelectronic plethysmography can be used following different measurement protocols, specifically developed for different applications and different experimental and clinical situations. (wikipedia.org)
- In the arrangement designed for the analysis in sitting and standing positions, 89 markers are arranged on the thoraco-abdominal surface.Optoelectronic plethysmography can be used also in supine and prone positions.OEP was used to study chest wall kinematics in healthy subjects during exercise, patients with Chronic Obstructive Pulmonary Disease, patients with neuromuscular disorders and in Intensive Care Unit. (wikipedia.org)
- The validation of the method was obtained by comparing the lung volume changes obtained by Volumetric and Flow measuring Spirometers and chest wall total volumes by optoelectronic plethysmography during different maneuvers. (wikipedia.org)
- This review evaluates the clinical usefulness of measuring chest wall kinematics by optoelectronic plethysmography [OEP]. (scienceopen.com)
- We measured thoracoabdominal chest wall, upper and lower rib-cage, and abdominal volumes with optoelectronic plethysmography, and the muscle activity of the sternocleidomastoid and superior and inferior intercostal muscles with electromyography. (rcjournal.com)
- Recently, optoelectronic plethysmography was developed to analyze chest wall kinematics, using a 3-compartment analysis that measures pulmonary volume and thoracoabdominal synchrony, and makes it possible to evaluate the subject in any position with the simultaneous analysis of respiratory muscle activity by using surface electromyography (EMG). (rcjournal.com)
Measurement4
- The principles of plethysmography were first applied to the measurement of the body volume and composition of infants in the early 1900s, but it was not until the 1960s that relatively stable measurements were achieved. (wikipedia.org)
- Penile plethysmography (PPG) or phallometry is measurement of bloodflow to the penis, typically used as a proxy for measurement of sexual arousal. (wikipedia.org)
- The most commonly reported methods of conducting penile plethysmography involve the measurement of the circumference of the penis with a mercury-in-rubber or electromechanical strain gauge, or the volume of the penis with an airtight cylinder and inflatable cuff at the base of the penis. (wikipedia.org)
- The purpose of this study was to evaluate the validity and reliability of air displacement plethysmography (ADP) compared to a dual energy x‐ray absorptiometry (DXA) criterion for body composition measurement in overweight and obese women (BMI ≥ 25·0 kg m2). (edu.au)
Barometric Plethysmography2
- Reference : Whole body barometric plethysmography measurements in dogs with brachycephalic airway. (ac.be)
- Objectives: This study used whole-body barometric plethysmography to characterize change(s) in respiratory physiology of C57BL/6 mice following bleomycin administration. (monash.edu)
Measured by body plethysmography2
- The aim of the study was to evaluate the relevance of work of breathing measured by body plethysmography in obese subjects and to compare the results with those of healthy controls and patients with pulmonary diseases of different pulmonary mechanics. (omicsonline.org)
- Total lung capacity measured by body plethysmography and by the helium dilution method. (meta.org)
Penile2
- In 1994, the Diagnostic and Statistical Manual of Mental Disorders (Fourth Edition) of the American Psychiatric Association stated that penile plethysmography has been used in research settings to assess various paraphilias by measuring an individual's sexual arousal in response to visual and auditory stimuli. (wikipedia.org)
- An investigation of response interference in penile plethysmography A well-documented problem of sex-offender assessment is dissimulation in the form of defense responding on three instruments widely used for this population: (a) Minnesota Multiphasic Personality Inventory-2 (MMPI-2), (b) Multiphasic Sex Inventory-2 (MSI-2), and (c) Penile Plethysmograph (PPG). (umn.edu)
Pulmonary Func1
- Body plethysmography is a pulmonary function test that determines how much air is in your lungs after you take in a deep breath. (childrenssleeplab.com)
Measurements3
- To assess accuracy, sinewave measurements were compared to body plethysmography in 44 healthy volunteers. (embs.org)
- Comparative measurements of the mucosal blood flow in the human maxillary sinus by plethysmography and by xenon. (semanticscholar.org)
- Plethysmography and ultrafast computed tomography measurements were performed at rest and during hyperaemic flow induced by symptom limited bicycle exercise followed by five minutes of leg ischaemia. (elsevier.com)
Diagnosis2
- Segmental volume plethysmography in the diagnosis of lower extremity arterial occlusive disease. (biomedsearch.com)
- In people with asthma or bronchitis, plethysmography may help in making the diagnosis and treatment of this disease. (firsthealthguide.com)
Limb1
- Limb plethysmography is a test that compares blood pressure in the legs and arms. (medlineplus.gov)
Body composition6
- Air displacement plethysmography or ADP (also known as whole-body air displacement plethysmography ) is a recognized and scientifically validated densitometric method to measure human body composition . (wikipedia.org)
- The purpose of this study was to develop an anthropometric model to estimate neonatal fat mass (kg) using an air displacement plethysmography (PEA POD ® Infant Body Composition System) as the criterion. (biomedcentral.com)
- Calibration of bioelectrical impedance analysis for body composition assessment in Ethiopian infants using air-displacement plethysmography. (bodystat.com)
- To compare the accuracy of air displacement plethysmography (ADP) and dual energy x-ray absorptionmetry (DXA) in tracking changes in body composition after a 16 month weight loss intervention in overweight and obese females. (biomedcentral.com)
- It is important to recognize that air-displacement plethysmography can be a practical instrument in the evaluation of body composition in a wide range of populations. (musclemetrics.zone)
- Therefore, based on the body of literature that has emerged, air-displacement plethysmography appears to be a suitable and reliable instrument in the assessment of body composition. (musclemetrics.zone)
Assessment3
- Pulse Oximetry and Plethysmography are non-invasive circulatory assessment methods used in blood flow monitoring, and both methods are supported by PowerLab and LabChart. (adinstruments.com)
- This study is aimed at evaluation of diagnostic value of Doppler sonography, MR venography and air-plethysmography for the assessment of abnormalities in the internal jugular veins, with catheter venography as the reference test. (clinicaltrials.gov)
- The results concerning COPD correspond earlier study, but the present results suggest that body plethysmography is suitable for the assessment of work of breathing also in obesity. (omicsonline.org)
Methods1
- For additional correlation with standard methods, the same protocol was repeated, and forearm blood flow was measured by strain gauge plethysmography. (ahajournals.org)
Thoracic2
- TLC was obtained by plethysmography as per American Thoracic Society/European Respiratory Society standards and by HRCT using custom software on 0.75 and 5 mm thick contiguous slices performed at full inspiration (TLC). (dovepress.com)
- Objectives: Body plethysmography is a lung function testing method usually applied for determination of thoracic gas volume and airways resistance, but option to measure work of breathing is available in most models. (omicsonline.org)
Noninvasive1
- Plethysmography is a noninvasive diagnostic manometric study used to measure changes in the size of blood vessels by determining volume changes in the blood vessels of the eye, extremities, and neck or to measure gas volume changes in the lungs. (thefreedictionary.com)
Tidal1
- This feasibility study examined whether structured light plethysmography (SLP) - a noncontact, light-based technique - could also detect differences in tidal breathing patterns between patients with COPD and healthy subjects. (dovepress.com)
Spirometry1
- Finally, 18 volunteers who experienced the inspired sinewave device, body plethysmography and spirometry were asked to rate the comfort of each technique on a scale of 1-10. (embs.org)
Airway3
- MCh) using unrestrained whole-body plethysmography and assess the ability of the immune system to mount an acquired Type I allergic hypersensitivity immune response (allergic airway disease). (mousephenotype.org)
- The Body Plethysmography, technique, also called "body box", is increasingly used in clinical practice because of better-controlled circumstances and the possibility to measure a greater number of more sensitive dynamic lung volumes than only FEV1 or vital capacity, but also parameters as Residual Volume (RV), oscillometry, Diffusion Capacity for carbon monoxide (DLCO) and Airway Resistance. (sgs.com)
- To demonstrate the role of extrathoracic airways in the overestimation of lung volumes by body plethysmography in airway obstruction, we induced in six normal subjects an artificial airway stenosis by inflating a balloon in the lower trachea. (meta.org)
Assess1
- For these reasons, there are situations in which many investigators choose to use the more traditional method of tail‐cuff plethysmography to either establish the blood pressure phenotype of a strain of mice or to assess the effects on blood pressure of an experimental intervention. (ahajournals.org)
Lungs3
- Lung plethysmography is a test used to measure how much air you can hold in your lungs. (ucsfbenioffchildrens.org)
- With the aid of plethysmography is measured how much air a person has in his lungs after maximal inhalation and how much air is left after maximal exhalation. (firsthealthguide.com)
- Lung plethysmography measures how much air is in your lungs after you take a deep breath and how much air is left in your lungs after you breathe out as much as you can. (cancer.ca)
Sensitivity3
- At all-time points, females injected with fibrils exhibited reduced odor detection sensitivity, which was observed with the semi-automated plethysmography apparatus, but not a buried pellet test. (nature.com)
- Both sensors demonstrated sensitivity to changes in pulse volume (plethysmography). (mdpi.com)
- Due to its sensitivity, the plethysmography system provides accurate data that can further be used for other studies such as those concerning cardiac oscillations. (advanceseng.com)
Computed tomography1
- To characterize and compare total lung capacity (TLC) measured by plethysmography with high-resolution computed tomography (HRCT), and to identify variables that predict the difference between the two modalities. (dovepress.com)
Evaluate1
- Plethysmography is used to evaluate symptoms of the upper respiratory tract, such as pain or discomfort during breathing, shortness of breath or the feeling of not getting enough air. (firsthealthguide.com)
Detection1
- In antiviral studies, the use of plethysmography resulted in the detection of a clear and rapid treatment response, which was similar to other non-invasive parameters, such as weight change. (usu.edu)
Arteriography1
- Plethysmography may be done for very ill people who cannot travel to the arteriography lab. (medlineplus.gov)
Volume3
- With air-displacement plethysmography, the volume of an object is measured indirectly by determining the volume of air it displaces inside an enclosed chamber (plethysmograph). (wikipedia.org)
- Plethysmography is used to measure changes in volume in different parts of the body. (medlineplus.gov)
- Plethysmography is measuring the volume or the volume change of organs, limbs or the entire body. (firsthealthguide.com)
Lung function3
- Plethysmography provides a sensitive evaluation of lung function in IAV-infected mice in response to antiviral therapy. (usu.edu)
- Plethysmography is a technique for measuring lung function that includes invasive and non-invasive methodologies. (monash.edu)
- Conclusions: We have demonstrated that plethysmography can be a primary indicator of the development of respiratory disease in the mouse and would thus be suitable in assessing potential therapies since any truly effective treatment should elicit restoration of respiratory parameters in addition to improving traditional biochemical and histological indices of lung function. (monash.edu)
Strain gauge2
- The AI6 is the ideal arterial inflow system for researchers who want a completely automated system with everything needed to perform the most advanced strain gauge plethysmography testing available today. (hokansonvascular.com)
- We compared BOLD SI changes with changes in blood flow determined by strain gauge plethysmography (SGP). (ahajournals.org)
Blood3
- Does Tail‐Cuff Plethysmography Provide a Reliable Estimate of Central Blood Pressure in Mice? (ahajournals.org)
- The PO2-100U Pulse Oximeter and Plethysmograph Sensor measures blood oxygen saturation (SpO2) and pulse pressure (plethysmography) using a non-invasive, dual-wavelength light transmittance based finger clip. (ophthalmologymanagement.com)
- The term 'plethysmography' is derived from the Latin word plethora (full-bloodedness, blood overload) and the Greek word graphein (writing, drawing). (firsthealthguide.com)
Diagnostic2
- Plethysmography is a topic covered in the Davis's Lab & Diagnostic Tests . (unboundmedicine.com)
- Nursing Central , nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425080/1/Plethysmography. (unboundmedicine.com)