Measurement of pulmonary capillary blood flow in infants by plethysmography.
نویسندگان
چکیده
منابع مشابه
Effect of respiration on pulmonary capillary blood flow in man.
Pulmonary capillary blood flow was measured in man during slow breathing by a modification of the body plethysmogTaph technique for measuring N2O uptake. In seated subjects breathing slowly, flow was significantly higher during inhalation. In supine subjects whose legs were raised, the difference between inhalation and exhalation was not significant. Flow was usually greater during tidal inhala...
متن کاملDetermination of the pulmonary capillary blood flow in man.
SEVERAL different methods based on respiratory maneuvers have been developed for the measurement of the rate of pulmonary capillary blood flow in man. These methods fall into two groups: (1) those involving the determination of the COo or 02 content of arterial and mixed venous blood from an analysis of alveolar gas—the first of these "indirect Pick methods" was developed by Loewy and von Schro...
متن کاملTissue blood flow measurement by laser Doppler technique
Measurement of blood flow and the effects of different factors on tissue blood flow are important fields of research in physiology and pharmacology. So far, different methods have been innovated, using laser light is the Last one. In this article history, principles and specifications of laser technique along with its advantages and disadvantages ( in comparison with other methods) are revie...
متن کاملThe pulsatile nature of the pulmonary capillary blood flow.
The nature of the pulmonary capillary blood flow is fundamental for the understanding both of pulmonary hemodynamics and of respiratory gas exchange. Direct examinations of the surface of the lung in the cat, rabbit, dog and rat (1-5) have indicated that pulmonary capillary blood flow is basically non-pulsatile. On the other hand, experimental studies by Lee and DuBois (6), using the body pleth...
متن کاملMeasurement of pulmonary blood flow by fractal analysis of flow heterogeneity in isolated canine lungs.
Regional heterogeneity of lung blood flow can be measured by analyzing the relative dispersion (RD) of mass (weight)-flow data. Numerous studies have shown that pulmonary blood flow is fractal in nature, a phenomenon that can be characterized by the fractal dimension and the RD for the smallest realizable volume element (piece size). Although information exists for the applicability of fractal ...
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ژورنال
عنوان ژورنال: Journal of Clinical Investigation
سال: 1977
ISSN: 0021-9738
DOI: 10.1172/jci108664