• Those authors have reported the presence of hyperperfusion in the upper zone of the lungs of those patients, suggesting that the BP can reflect changes in the regional distribution of ventilation and perfusion. (scielo.br)
  • Moreover, a similar understanding exists for the relationship between the distribution of blood flow and the distribution of ventilation. (wikipedia.org)
  • an assessment of the respiratory system that provides information about ventilation, airflow, lung volumes and capacity, and the diffusion of gas incorporating spirometry, peak flow meters, and the body plethysmograph. (thefreedictionary.com)
  • The lungs also provide airflow that makes vocal sounds including human speech possible. (wikipedia.org)
  • Specific primary indications such as whole lung lavage [ 3 ] and massive hemoptysis [ 4 ] have since been identified. (biomedcentral.com)
  • The Whole-Lung Lavage (WLL) proposed in the 1960s, remains the treatment of choice. (scielo.br)
  • Female patient, aged 6 years and 8 months, 25 kg, diagnosed with pulmonary alveolar proteinoisis, who underwent whole-lung lavage by sequential lobar fiberoptic bronchoscopy under general anesthesia and spontaneous ventilation. (scielo.br)
  • 5,6 Whole-Lung Lavage (WLL) is still the treatment of choice, providing an increase in PaO2, improved pulmonary function (FEV1, VC and diffusing capacity for carbon monoxide) and an increase in 5-year survival 3 . (scielo.br)
  • Tidal volume, pulmonary ventilation and mean inspiratory flow significantly increased in the sitting position, with no difference between the groups. (scielo.br)
  • The volume of air moved in or out of the lungs under normal resting circumstances (the resting tidal volume of about 500 ml), and volumes moved during maximally forced inhalation and maximally forced exhalation are measured in humans by spirometry. (wikipedia.org)
  • With high frequency ventilation, the tidal volumes used are smaller than anatomical and equipment dead space and therefore alternative mechanisms of gas exchange occur. (wikipedia.org)
  • APRV begins at a pressure higher than the baseline pressure and follows with a deflation to accomplish tidal ventilation. (wikipedia.org)
  • Emphysema - A disease in which the small air sacs in the lungs become damaged, causing shortness of breath. (thefreedictionary.com)
  • Independent lung ventilation (ILV) can be classified into anatomical and physiological lung separation. (biomedcentral.com)
  • Anatomical lung separation isolates a diseased lung from contaminating the non-diseased lung. (biomedcentral.com)
  • There are some clear indications for ILV as a primary intervention and as a rescue ventilator strategy in both anatomical and physiological lung separation. (biomedcentral.com)
  • Anatomical separation aims to isolate one lung from potentially injurious contaminants from the other diseased lung. (biomedcentral.com)
  • Anatomical isolation remains a short-term intervention and is not used for prolonged ventilation because infections cannot be reliably localised by blockers and hemoptysis can only be transiently tamponaded. (biomedcentral.com)
  • Anatomical shunting occurs when too much of the blood supplying the lung tissues via the bronchial arteries is being returned via the pulmonary veins without undergoing gas exchange. (wikipedia.org)
  • Several methods for proton-MRI-based ventilation measurements have been proposed in order to overcome these difficulties. (springer.com)
  • Perfusion measurements are taken by comparing the radioactivity of selected regions within the body to radioactivity of blood samples withdrawn at the time of microsphere injection. (wikipedia.org)
  • There are different types of High frequency ventilation. (wikipedia.org)
  • The adverse side effects noted during the use of high-frequency ventilation include those commonly found during the use of conventional positive pressure ventilators. (wikipedia.org)
  • Effects of transpulmonary and vascular pressures on pulmonary blood volume in isolated lung. (springer.com)
  • West JB, Dollery CT and Naimark A.: Distribution of blood flow in isolated lung: Relation to vascular and alveolar pressures. (springer.com)
  • The principal factor involved in the creation of this V/Q gradient between the apex and the base of the lung is gravity (this is why V/Q ratios change in positions other than the orthostatic position). (wikipedia.org)
  • However, ventilation and perfusion are highest in base of the lung, resulting in a comparatively lower V/Q ratio. (wikipedia.org)
  • The principal factor involved in the genesis of V/Q dishomogeneity between the apex and the base of the lung is gravity (this is why V/Q ratios change in positions other than the orthostatic one). (wikipedia.org)
  • Inhomogeneity in the lung impairs gas exchange and can be an early marker of lung disease. (ox.ac.uk)
  • Our aim was to explore whether one parameterization of lung inhomogeneity could both fit such data and provide reliable parameter estimates. (ox.ac.uk)
  • Furthermore, lung conductivity fluctuates intensely during the breath cycle which accounts for the immense interest of the research community to use EIT as a bedside method to visualize inhomogeneity of lung ventilation in mechanically ventilated patients. (wikipedia.org)
  • Bindslev L, Hedenstierna G, Santesson J, Gottlieb I and Carvallhas A.: Ventialtion-perfusion distribution during inhalation anaesthesia. (springer.com)
  • Decreased circulation of the injected MAA indicates a problem with blood flow into or within the lungs. (wikipedia.org)
  • No gravity-independent gradient of blood flow distribution in dog lung. (springer.com)
  • Redistribution of pulmonary blood flow in the dog with positive end-expiratory pressure Ventilation. (springer.com)
  • By redirecting blood flow from poorly-ventilated lung regions to well-ventilated lung regions, HPV is thought to be the primary mechanism underlying ventilation/perfusion matching. (wikipedia.org)
  • They can also be used to describe areas or effects where blood flow and ventilation are not properly matched though both may be present to varying extents. (wikipedia.org)
  • The acquired data are then postprocessed to obtain perfusion maps with different parameters, such as BV (blood volume), BF (blood flow), MTT (mean transit time) and TTP (time to peak). (wikipedia.org)
  • More severe cases can include signs such as cyanosis (blue discoloration, usually of the lips and fingers), collapse, and circulatory instability because of decreased blood flow through the lungs and into the left side of the heart. (wikipedia.org)