Forced Expiratory Volume
Respiratory Function Tests
Nonlinear indicial response of complex nonstationary oscillations as pulmonary hypertension responding to step hypoxia. (1/1280)This paper is devoted to the quantization of the degree of nonlinearity of the relationship between two biological variables when one of the variables is a complex nonstationary oscillatory signal. An example of the situation is the indicial responses of pulmonary blood pressure (P) to step changes of oxygen tension (DeltapO2) in the breathing gas. For a step change of DeltapO2 beginning at time t1, the pulmonary blood pressure is a nonlinear function of time and DeltapO2, which can be written as P(t-t1 | DeltapO2). An effective method does not exist to examine the nonlinear function P(t-t1 | DeltapO2). A systematic approach is proposed here. The definitions of mean trends and oscillations about the means are the keys. With these keys a practical method of calculation is devised. We fit the mean trends of blood pressure with analytic functions of time, whose nonlinearity with respect to the oxygen level is clarified here. The associated oscillations about the mean can be transformed into Hilbert spectrum. An integration of the square of the Hilbert spectrum over frequency yields a measure of oscillatory energy, which is also a function of time, whose mean trends can be expressed by analytic functions. The degree of nonlinearity of the oscillatory energy with respect to the oxygen level also is clarified here. Theoretical extension of the experimental nonlinear indicial functions to arbitrary history of hypoxia is proposed. Application of the results to tissue remodeling and tissue engineering of blood vessels is discussed. (+info)
Common 3 and 10 Hz oscillations modulate human eye and finger movements while they simultaneously track a visual target. (2/1280)1. A 10 Hz range centrally originating oscillation has been found to modulate slow finger movements and anticipatory smooth eye movements. To determine if an interaction or linkage occurs between these two central oscillations during combined visuo-manual tracking, frequency and coherence analysis were performed on finger and eye movements while they simultaneously tracked a visual target moving in intermittently visible sinusoidal patterns. 2. Two different frequencies of common or linked oscillation were found. The first, at 2-3 Hz, was dependent on visual feedback of target and finger tracking positions. The second, at around 10 Hz, still occurred when both target and finger positions were largely obscured, indicating that this common oscillation was generated internally by the motor system independent of visual feedback. Both 3 and 10 Hz oscillation frequencies were also shared by the right and left fingers if subjects used these together to track a visual target. 3. The linking of the 10 Hz range oscillations between the eyes and finger was task specific; it never occurred when eye and finger movements were made simultaneously and independently, but only when they moved simultaneously and followed the target together. However, although specific for tracking by the eyes and fingers together, the linking behaviour did not appear to be a prerequisite for such tracking, since significant coherence in the 10 Hz range was only present in a proportion of trials where these combined movements were made. 4. The experiments show that common oscillations may modulate anatomically very distinct structures, indicating that single central oscillations may have a widespread distribution in the central nervous system. The task-specific manifestation of the common oscillation in the eye and finger suggests that such mechanisms may have a functional role in hand-eye co-ordination. (+info)
Voltage-dependent entry and generation of slow Ca2+ oscillations in glucose-stimulated pancreatic beta-cells. (3/1280)The role of voltage-dependent Ca2+ entry for glucose generation of slow oscillations of the cytoplasmic Ca2+ concentration ([Ca2+]i) was evaluated in individual mouse pancreatic beta-cells. Like depolarization with K+, a rise of the glucose concentration resulted in an enhanced influx of Mn2+, which was inhibited by nifedipine. This antagonist of L-type Ca2+ channels also blocked the slow oscillations of [Ca2+]i induced by glucose. The slow oscillations occurred in synchrony with variations in Mn2+ influx and bursts of action currents, with the elevation of [Ca2+]i being proportional to the frequency of the action currents. A similar relationship was obtained when Ca2+ was replaced with Sr2+. Occasionally, the slow [Ca2+]i oscillations were superimposed with pronounced spikes temporarily arresting the action currents. It is concluded that the glucose-induced slow oscillations of [Ca2+]i are caused by periodic depolarization with Ca2+ influx through L-type channels. Ca2+ spiking, due to intracellular mobilization, may be important for chopping the slow oscillations of [Ca2+]i into shorter ones characterizing beta-cells situated in pancreatic islets. (+info)
Diazepam-binding inhibitor33-50 elicits Ca2+ oscillation and CCK secretion in STC-1 cells via L-type Ca2+ channels. (4/1280)We recently isolated and characterized 86-amino acid CCK-releasing peptide from porcine intestinal mucosa. The sequence of this peptide is identical to that of porcine diazepam-binding inhibitor (DBI). Intraduodenal administration of DBI stimulates the CCK release and elicits pancreatic secretion in rats. In this study we utilized a murine tumor cell line (STC-1 cells) that contains CCK to examine if DBI directly acts on these cells to stimulate CCK release. We investigated the cellular mechanisms responsible for this action. We showed that DBI33-50, a biologically active fragment of DBI1-86, significantly stimulated CCK secretion in STC-1 cells. This action was abolished by Ca2+-free medium. The mean basal intracellular Ca2+ concentration ([Ca2+]i) was 52 nM in fura 2-loaded STC-1 cells. DBI33-50 (1-1,000 nM) elicited Ca2+ oscillations; DBI33-50 (10 nM) increased the oscillation frequency to 5 cycles/10 min and elicited a net [Ca2+]i increase (peak - basal) to 157 nM. In contrast, bombesin and forskolin caused an initial transient [Ca2+]i followed by a small sustained [Ca2+]i plateau. Withdrawal of extracellular Ca2+ abolished Ca2+ oscillations stimulated by DBI33-50. L-type Ca2+ channel blockers nifedipine and diltiazem (3-10 microM) markedly attenuated DBI-stimulated Ca2+ oscillations. In other cell types L-type Ca2+ channels are activated by cAMP-protein kinase A. DBI33-50 failed to stimulate cAMP formation in STC-1 cells. Similarly, DBI33-50 had no effect on myo-inositol 1,4, 5-trisphosphate concentration ([IP3]), whereas bombesin caused an eightfold increase in [IP3] over basal. In addition, inhibitors of phospholipase C (U-73122), phospholipase A2 (ONO-RS-082), and protein tyrosine kinase (genistein) did not alter the Ca2+ oscillations elicited by DBI33-50. It appears that DBI33-50 acts directly on STC-1 cells to elicit Ca2+ oscillations via the voltage-dependent L-type Ca2+ channels, resulting in the secretion of CCK. Mediation of this action is by intracellular mechanisms independent of the traditional signal transduction pathways, including phospholipase C, phospholipase A2, protein tyrosine kinase, and cAMP systems. (+info)
Tonic and phasic influences of nitric oxide on renal blood flow autoregulation in conscious dogs. (5/1280)The aim of this study was to investigate the influence of the mean level and phasic modulation of NO on the dynamic autoregulation of renal blood flow (RBF). Transfer functions were calculated from spontaneous fluctuations of RBF and arterial pressure (AP) in conscious resting dogs for 2 h under control conditions, after NO synthase (NOS) inhibition [NG-nitro-L-arginine methyl ester hydrochloride (L-NAME)] and after L-NAME followed by a continuous infusion of an NO donor [S-nitroso-N-acetyl-DL-penicillamine (SNAP)]. After L-NAME (n = 7) AP was elevated, heart rate (HR) and RBF were reduced. The gain of the transfer function above 0.08 Hz was increased, compatible with enhanced resonance of the myogenic response. A peak of high gain around 0.03 Hz, reflecting oscillations of the tubuloglomerular feedback (TGF), was not affected. The gain below 0.01 Hz, was elevated, but still less than 0 dB, indicating diminished but not abolished autoregulation. After L-NAME and SNAP (n = 5), mean AP and RBF were not changed, but HR was slightly elevated. The gain above 0.08 Hz and the peak of high gain at 0.03 Hz were not affected. The gain below 0.01 Hz was elevated, but smaller than 0 dB. It is concluded that NO may help to prevent resonance of the myogenic response depending on the mean level of NO. The feedback oscillations of the TGF are not affected by NO. NO contributes to the autoregulation below 0.01 Hz due to phasic modulation independent of its mean level. (+info)
Synchronization of local neural networks in the somatosensory cortex: A comparison of stationary and moving stimuli. (6/1280)Spontaneous and stimulus-induced responses were recorded from neighboring groups of neurons by an array of electrodes in the primary (SI) somatosensory cortex of intact, halothane-anesthetized cats. Cross-correlation analysis was used to characterize the coordination of spontaneous activity and the responses to peripheral stimulation with moving or stationary air jets. Although synchronization was detected in only 10% (88 of 880) of the pairs of single neurons that were recorded, cross-correlation analysis of multiunit responses revealed significant levels of synchronization in 64% of the 123 recorded electrode pairs. Compared with spontaneous activity, both stationary and moving air jets caused substantial increases in the rate, proportion, and temporal precision of synchronized activity in local regions of SI cortex. Among populations of neurons that were synchronized by both types of air-jet stimulation, the mean rate of synchronized activity was significantly higher during moving air-jet stimulation than during stationary air-jet stimulation. Moving air jets also produced significantly higher correlation coefficients than stationary air jets in the raw cross-correlograms (CCGs) but not in the shift-corrected CCGs. The incidence and rate of stimulus-induced synchronization varied with the distance separating the recording sites. For sites separated by /=500 microm, only 37% of the multiunit responses were synchronized by discrete stimulation with a single air jet. Measurements of the multiunit CCG peak half-widths showed that the correlated activity produced by moving air jets had slightly less temporal variability than that produced by stationary air jets. These results indicate that moving stimuli produce greater levels of synchronization than stationary stimuli among local groups of SI neurons and suggest that neuronal synchronization may supplement the changes in firing rate which code intensity and other attributes of a cutaneous stimulus. (+info)
Coherent oscillations in membrane potential synchronize impulse bursts in central olfactory neurons of the crayfish. (7/1280)Lateral protocerebral interneurons (LPIs) in the central olfactory pathway of the freshwater crayfish Procambarus clarkii reside within the lateral protocerebrum and receive direct input from projection neurons of the olfactory midbrain. The LPIs exhibit periodic (0.5 Hz) changes in membrane potential that are imposed on them synaptically. Acute surgical experiments indicate that the synaptic activity originates from a group of oscillatory neurons lying within the lateral protocerebrum. Simultaneous intracellular recordings from many LPI pairs indicate that this periodic synaptic input is synchronous and coherent among the population of approximately 200 LPIs on each side of the brain. In many LPIs, specific odors applied to antennules in isolated head preparations generate long-lasting excitatory postsynaptic potentials and impulse bursts. The impulse bursts are generated only near the peaks of the ongoing depolarizations, approximately 1 s after stimulus application, and so the periodic baseline activity is instrumental in timing burst generation. Simultaneous recordings from pairs of LPIs show that, when impulse bursts occur in both cells after an odorant stimulus, they are synchronized by the common periodic depolarizations. We conclude that the common, periodic activity in LPIs can synchronize impulse bursts in subsets of these neurons, possibly generating powerful long-lasting postsynaptic effects in downstream target neurons. (+info)
Bursting in inhibitory interneuronal networks: A role for gap-junctional coupling. (8/1280)Much work now emphasizes the concept that interneuronal networks play critical roles in generating synchronized, oscillatory behavior. Experimental work has shown that functional inhibitory networks alone can produce synchronized activity, and theoretical work has demonstrated how synchrony could occur in mutually inhibitory networks. Even though gap junctions are known to exist between interneurons, their role is far from clear. We present a mechanism by which synchronized bursting can be produced in a minimal network of mutually inhibitory and gap-junctionally coupled neurons. The bursting relies on the presence of persistent sodium and slowly inactivating potassium currents in the individual neurons. Both GABAA inhibitory currents and gap-junctional coupling are required for stable bursting behavior to be obtained. Typically, the role of gap-junctional coupling is focused on synchronization mechanisms. However, these results suggest that a possible role of gap-junctional coupling may lie in the generation and stabilization of bursting oscillatory behavior. (+info)
Oscillometry is a non-invasive method to measure various mechanical properties of the respiratory system, including lung volumes and airway resistance. It involves applying small pressure oscillations to the airways and measuring the resulting flow or volume changes. The technique can be used to assess lung function in patients with obstructive or restrictive lung diseases, as well as in healthy individuals. Oscillometry is often performed during tidal breathing, making it a comfortable method for both children and adults who may have difficulty performing traditional spirometry maneuvers.
Airway resistance is a measure of the opposition to airflow during breathing, which is caused by the friction between the air and the walls of the respiratory tract. It is an important parameter in respiratory physiology because it can affect the work of breathing and gas exchange.
Airway resistance is usually expressed in units of cm H2O/L/s or Pa·s/m, and it can be measured during spontaneous breathing or during forced expiratory maneuvers, such as those used in pulmonary function testing. Increased airway resistance can result from a variety of conditions, including asthma, chronic obstructive pulmonary disease (COPD), bronchitis, and bronchiectasis. Decreased airway resistance can be seen in conditions such as emphysema or after a successful bronchodilator treatment.
Spirometry is a common type of pulmonary function test (PFT) that measures how well your lungs work. This is done by measuring how much air you can exhale from your lungs after taking a deep breath, and how quickly you can exhale it. The results are compared to normal values for your age, height, sex, and ethnicity.
Spirometry is used to diagnose and monitor certain lung conditions, such as asthma, chronic obstructive pulmonary disease (COPD), and other respiratory diseases that cause narrowing of the airways. It can also be used to assess the effectiveness of treatment for these conditions. The test is non-invasive, safe, and easy to perform.
Forced Expiratory Volume (FEV) is a medical term used to describe the volume of air that can be forcefully exhaled from the lungs in one second. It is often measured during pulmonary function testing to assess lung function and diagnose conditions such as chronic obstructive pulmonary disease (COPD) or asthma.
FEV is typically expressed as a percentage of the Forced Vital Capacity (FVC), which is the total volume of air that can be exhaled from the lungs after taking a deep breath in. The ratio of FEV to FVC is used to determine whether there is obstruction in the airways, with a lower ratio indicating more severe obstruction.
There are different types of FEV measurements, including FEV1 (the volume of air exhaled in one second), FEV25-75 (the average volume of air exhaled during the middle 50% of the FVC maneuver), and FEV0.5 (the volume of air exhaled in half a second). These measurements can provide additional information about lung function and help guide treatment decisions.
Respiratory Function Tests (RFTs) are a group of medical tests that measure how well your lungs take in and exhale air, and how well they transfer oxygen and carbon dioxide into and out of your blood. They can help diagnose certain lung disorders, measure the severity of lung disease, and monitor response to treatment.
RFTs include several types of tests, such as:
1. Spirometry: This test measures how much air you can exhale and how quickly you can do it. It's often used to diagnose and monitor conditions like asthma, chronic obstructive pulmonary disease (COPD), and other lung diseases.
2. Lung volume testing: This test measures the total amount of air in your lungs. It can help diagnose restrictive lung diseases, such as pulmonary fibrosis or sarcoidosis.
3. Diffusion capacity testing: This test measures how well oxygen moves from your lungs into your bloodstream. It's often used to diagnose and monitor conditions like pulmonary fibrosis, interstitial lung disease, and other lung diseases that affect the ability of the lungs to transfer oxygen to the blood.
4. Bronchoprovocation testing: This test involves inhaling a substance that can cause your airways to narrow, such as methacholine or histamine. It's often used to diagnose and monitor asthma.
5. Exercise stress testing: This test measures how well your lungs and heart work together during exercise. It's often used to diagnose lung or heart disease.
Overall, Respiratory Function Tests are an important tool for diagnosing and managing a wide range of lung conditions.
Blood pressure determination is the medical procedure to measure and assess the force or pressure exerted by the blood on the walls of the arteries during a heartbeat cycle. It is typically measured in millimeters of mercury (mmHg) and is expressed as two numbers: systolic pressure (the higher number, representing the pressure when the heart beats and pushes blood out into the arteries) and diastolic pressure (the lower number, representing the pressure when the heart rests between beats). A normal blood pressure reading is typically around 120/80 mmHg. High blood pressure (hypertension) is defined as a consistently elevated blood pressure of 130/80 mmHg or higher, while low blood pressure (hypotension) is defined as a consistently low blood pressure below 90/60 mmHg. Blood pressure determination is an important vital sign and helps to evaluate overall cardiovascular health and identify potential health risks.
Asthma is a chronic respiratory disease characterized by inflammation and narrowing of the airways, leading to symptoms such as wheezing, coughing, shortness of breath, and chest tightness. The airway obstruction in asthma is usually reversible, either spontaneously or with treatment.
The underlying cause of asthma involves a combination of genetic and environmental factors that result in hypersensitivity of the airways to certain triggers, such as allergens, irritants, viruses, exercise, and emotional stress. When these triggers are encountered, the airways constrict due to smooth muscle spasm, swell due to inflammation, and produce excess mucus, leading to the characteristic symptoms of asthma.
Asthma is typically managed with a combination of medications that include bronchodilators to relax the airway muscles, corticosteroids to reduce inflammation, and leukotriene modifiers or mast cell stabilizers to prevent allergic reactions. Avoiding triggers and monitoring symptoms are also important components of asthma management.
There are several types of asthma, including allergic asthma, non-allergic asthma, exercise-induced asthma, occupational asthma, and nocturnal asthma, each with its own set of triggers and treatment approaches. Proper diagnosis and management of asthma can help prevent exacerbations, improve quality of life, and reduce the risk of long-term complications.
A lung is a pair of spongy, elastic organs in the chest that work together to enable breathing. They are responsible for taking in oxygen and expelling carbon dioxide through the process of respiration. The left lung has two lobes, while the right lung has three lobes. The lungs are protected by the ribcage and are covered by a double-layered membrane called the pleura. The trachea divides into two bronchi, which further divide into smaller bronchioles, leading to millions of tiny air sacs called alveoli, where the exchange of gases occurs.
Chronic obstructive pulmonary disease (COPD) is a progressive lung disease characterized by the persistent obstruction of airflow in and out of the lungs. This obstruction is usually caused by two primary conditions: chronic bronchitis and emphysema. Chronic bronchitis involves inflammation and narrowing of the airways, leading to excessive mucus production and coughing. Emphysema is a condition where the alveoli (air sacs) in the lungs are damaged, resulting in decreased gas exchange and shortness of breath.
The main symptoms of COPD include progressive shortness of breath, chronic cough, chest tightness, wheezing, and excessive mucus production. The disease is often associated with exposure to harmful particles or gases, such as cigarette smoke, air pollution, or occupational dusts and chemicals. While there is no cure for COPD, treatments can help alleviate symptoms, improve quality of life, and slow the progression of the disease. These treatments may include bronchodilators, corticosteroids, combination inhalers, pulmonary rehabilitation, and, in severe cases, oxygen therapy or lung transplantation.
Acute inhalation injury
Chronic obstructive pulmonary disease
William N. Rom
List of MeSH codes (H01)
Oscillometry | Profiles RNS
oscillometry | Taber's Medical Dictionary
Asthma Webinar: Spirometry, FeNO, and Oscillometry | RT
ERS 2019 International Congress - SW10 Skills workshop Recent advances in oscillometry
Airwave oscillometry to measure lung function in children with Down syndrome | THORASYS
Airwave Oscillometry - Fast and Easy Assessment of Small Airway Function Webinar Replay | Clario
Changes in respiratory mechanics with increasing degrees of airway obstruction in COPD: detection by forced oscillation...
Therapeutics and Clinical Risk Management | Volume 16 - Dove Press
Reference values of impulse oscillometry (IOS) for healthy Chinese children aged 4-17 years | Respiratory Research | Full Text
Could We Predict POAF With a Simple Ambulatory Oscillometry Evaluating Aortic Stiffness? | Braz J Cardiovasc Surg;38(6):...
E. Pungor Books & Audiobooks | Scribd
Victor Pachon - Wikipedia
Asthma (Children) | National University Hospital
Conferences | Division of Pulmonary, Critical Care, and Sleep Medicine | UTHSC
Research 2 Care Community Engagement - Recap - WTC Health Program Research Gateway
Sensitive methods for assessment of lung health in welders and controls | Lund University Publications
Status Asthmaticus: Practice Essentials, Background, Etiology
Status Asthmaticus Treatment & Management: Approach Considerations, Beta2-Agonists, Anticholinergics
NIOSHTIC-2 Search Results - Full View
Evaluation of COPD Longitudinally to Identify Predictive Surrogate End-points (ECLIPSE) | European Respiratory Society
Virtual Visits Improve Infectious Disease Care | RT
WTS database | WHO FCTC
Asthma in Children: Childhood Symptoms, Treatment & Prognosis
Clinical Trials Register
Thieme E-Journals - Pneumologie / Abstract
International Congress Barcelona 2013
eBP: An Ear-Worn Device for Frequent and Comfortable Blood Pressure Monitoring | August 2021 | Communications of the ACM
Increased Serum IGF-I During Pregnancy Is Associated With Progression of Diabetic Retinopathy | Diabetes | American Diabetes...
- Discussing how spirometry, FeNO, and oscillometry together may enhance the care of patients with asthma. (respiratory-therapy.com)
- Because the gold standard metric of lung function, spirometry, may not be feasible in children with intellectual disabilities, we sought to assess the feasibility of both airwave oscillometry and spirometry in children with Down syndrome. (thorasys.com)
- Participants performed airwave oscillometry and spirometry before and 10 min after albuterol. (thorasys.com)
- Airwave oscillometry was successful in 26 participants (76.5%) and 4 (11.8%) were successful with spirometry. (thorasys.com)
- Lung measurements were performed with standard spirometry and new methods: airspace dimension assessment (AiDA), oscillometry, blood serum biomarkers (club cell. (lu.se)
- Lung measurements were performed with standard spirometry and new methods: airspace dimension assessment (AiDA), oscillometry, blood serum biomarkers (club cell secretory protein 16, surfactant protein D, matrix metalloproteinases, fibroblast, hepatocyte growth factor, interleukins), and one urine biomarker (desmosine). (lu.se)
- Characterization of the patients is crucial and includes symptoms (questionnaires), lung function tests (spirometry, body plethysmography, diffusion capacity, and impulse oscillometry), imaging (Chest X-ray and computer tomography), 6 minute walk test, echocardiography and blood chemistry. (ki.se)
- Lung function outcomes were measured by spirometry, plethysmography, and oscillometry. (cdc.gov)
- Assessments include pulmonary function measurements (spirometry, impulse oscillometry and plethysmography), chest computed tomography, biomarker measurement (in blood, sputum, urine and exhaled breath condensate), health outcomes, body impedance, resting oxygen saturation and 6-min walking distance. (ersjournals.com)
- Recent studies have shown that lung clearance index testing and impulse oscillometry are more sensitive than spirometry in detecting small airways abnormalities and may augment the diagnosis of occupational bronchiolitis. (lww.com)
- Sixteen LCS patients were subjected to resting lung function (spirometry and respiratory oscillometry-RO) and cardiopulmonary performance to exercise (Spiropalm®-equipped six-minute walk test-6MWT and cardiopulmonary exercise test-CPX). (nih.gov)
- However, studies show that combining the advantages of spirometry and oscillometry promotes optimal detection of asthma and COPD. (schillerus.com)
- In younger children who cannot perform the proper technique for lung function testing, impulse oscillometry is used to measure airway resistance. (medicinenet.com)
- Can impulse oscillometry and body plethysmography differentiate response to two salbutamol doses? (ers-education.org)
- Recent advances that may aid in diagnosis include transbronchial cryobiopsy, lung clearance index testing, and impulse oscillometry, although further research is needed. (lww.com)
- 94728 Airway resistance by impulse Oscillometry . (schillerus.com)
- Phil Lake, PhD, Director, Respiratory Solutions at Clario, and Lennart Lunblad, PhD, Director Clinical Science, Thorasys Thoracic Medical Systems Inc, discuss the uses of oscillometry in clinical trials and the potential for oscillometry based endpoints to augment or replace traditional lung function endpoints to better understand the impact of new medicines. (clario.com)
- Oscillometry is a special lung function test that can be used for children between 2 and 6 years old. (nuh.com.sg)
- tremoflo® is a device that uses airway oscillometry to monitor lung function and diagnose diseases like asthma and COPD. (schillerus.com)
- Oscillometry is a lung function test that measures the resistance and reactance of the respiratory system using waves. (schillerus.com)
- Measures of pulmonary function were successfully obtained using airwave oscillometry in children with Down syndrome, which supports its use in this high-risk population. (thorasys.com)
- Friedman NL, McDonough JM, Hysinger EB, Allen JL: Bronchodilator responsiveness assessed by the forced oscillometry and multiple breath washout techniques in preschool children with asthma. (chop.edu)
- A positive bronchodilator response by oscillometry was observed in 5/23 (21.7%) of those with successful pre- and post-bronchodilator testing. (thorasys.com)
- Welders had significantly higher respiratory system resistance assessed with oscillometry, serum levels of metalloproteinases 9 and hepatocyte growth factor, compared with controls. (lu.se)
- Oscillometry" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
- When a group of 46 dogs weighing less than 15 kg were put in an extra "low weight" group the Doppler group again showed slightly higher values and the Oscillometry Group changed also only insignificantly. (vin.com)
- Procedure -In phase 1, RRS was measured by using forced oscillometry (FOT) in 5 clinically normal horses before and after sedation with xylazine. (avma.org)
Assessed by spirometry1
- To determine longitudinal lung function as assessed by spirometry and oscillometry in a diverse population exposed to WTC dust while undergoing standardized evaluation and therapy. (cdc.gov)
- The findings were limited by several factors including the measurement of airway impedance only at the peak methacholine dose, and the measurement of oscillometry after spirometry, the researchers noted. (medscape.com)
Spirometry and oscillometry3
- Residual abnormality was present in spirometry and oscillometry up to 7 years following enrollment in the BHC-EHC. (cdc.gov)
- Combining spirometry and oscillometry might reveal abnormalities in lung mechanics particularly pertinent to people with obesity and asthma," the researchers noted. (medscape.com)
- Patients were assessed using spirometry and oscillometry. (medscape.com)
- The tremoflo® Airwave Oscillometry System (AOS) has revolutionized the Forced Oscillation Technique (FOT) by using a vibrating mesh to superimpose a gentle oscillatory pressure and flow wave onto the patient's spontaneous breathing to measure respiratory impedance as lung resistance (R) and reactance (X). The resulting waveforms from the tremoflo® AOS provide measurements of the mechanical properties of the large central and smaller peripheral airways. (thorasys.com)
- Spectral oscillometry revealed normal respiratory resistance, low reactance, especially during inspiration at 5 Hz (X5in), elevated reactance area and resonance frequency. (thorasys.com)
- Intrabreath oscillometry identified markedly low reactance at end-inspiration (XeI). (thorasys.com)
- Background The usual analysis of forced oscillometry measures respiratory resistance (Rrs) and reactance (Xrs) averaged over several tidal breaths (whole-breath analysis). (bmj.com)
- Respiratory impedance was evaluated by use of oscillometry, and resistance and reactance data were partitioned into lung and chest wall components. (avma.org)
- The current prospective cross-sectional study investigated whether respiratory oscillometry provides complementary data to pulmonary function tests (PFTs) and is correlated with PVV. (thorasys.com)
- Results -Pulmonary resistance measured by use of oscillometry but not by use of classical methods was significantly increased by the tension of the girth strap. (avma.org)
- The exam was conducted according to technical standards published in 2020 by the European Respiratory Society for Respiratory Oscillometry. (jscimedcentral.com)
- New technical standards have been published for respiratory oscillometry in 2020 by the European Respiratory Society updating previous standards dating back to 2003 . (jscimedcentral.com)
- patients reported a significantly higher satisfaction with Oscillometry compared with Spirometry and found Oscillometry to be significantly easier to perform than spirometry. (thorasys.com)
- 11. Oscillometry as a Predictor of Exercise Tolerance in COPD. (nih.gov)
- CT images within 6 months of oscillometry were analysed in a subgroup (26 patients) using automated lung texture analysis. (thorasys.com)
- Unlike spirometry, a forced maneuver that requires patient cooperation (5, 6), oscillometry is conducted during normal breathing and requires minimal patient cooperation. (thorasys.com)
- The tremoflo® C-100 Airwave Oscillometry System (AOS) is compact, handheld, and portable. (thorasys.com)
- Improvement in oscillometry during standardized therapy was related to bronchodilator response at baseline. (cdc.gov)