Effects of alveolar dead-space, shunt andV˙/Q˙distribution on respiratory dead-space measurements
نویسندگان
چکیده
منابع مشابه
Effects of alveolar dead-space, shunt and V/Q distribution on respiratory dead-space measurements.
BACKGROUND Respiratory dead-space is often increased in lung disease. This study evaluates the effects of increased alveolar dead-space (Vd(alv)), pulmonary shunt, and abnormal ventilation perfusion ratio (/) distributions on dead-space and alveolar partial pressure of carbon dioxide (Pa(co(2))) calculated by various methods, assesses a recently published non-invasive method (Koulouris method) ...
متن کاملRESPIRATION AND THE AIRWAY Effects of alveolar dead - space , shunt and _ V = _ Q distribution on respiratory dead - space measurements
Background. Respiratory dead-space is often increased in lung disease. This study evaluates the effects of increased alveolar dead-space (VDalv), pulmonary shunt, and abnormal ventilation perfusion ratio ( _ V= _ Q) distributions on dead-space and alveolar partial pressure of carbon dioxide (PACO2) calculated by various methods, assesses a recently published non-invasive method (Koulouris metho...
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We report a complicated case of acute respiratory distress syndrome (ARDS) from severe sepsis, in which we measured the ratio of physiologic dead space to tidal volume (V(D)/V(T)) with volumetric capnography prior to, during, and after therapy with human recombinant activated protein C. Previous studies hypothesized that early in ARDS, elevated V(D)/V(T) primarily reflects increased alveolar V(...
متن کاملAlveolar Dead Space Fraction Discriminates Mortality in Pediatric Acute Respiratory Distress Syndrome.
OBJECTIVES Physiologic dead space is associated with mortality in acute respiratory distress syndrome, but its measurement is cumbersome. Alveolar dead space fraction relies on the difference between arterial and end-tidal carbon dioxide (alveolar dead space fraction = (PaCO2 - PetCO2) / PaCO2). We aimed to assess the relationship between alveolar dead space fraction and mortality in a cohort o...
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CONSIDERABLE UNCERTAINTY existed regarding the magnitude of pulmonary dead space in the immediate post-World War II era. The dead space concept was originated by Bohr (2), who viewed total ventilation as composed of two distinct, but homogeneous, components—alveolar ventilation that participated fully in gas exchange and dead space ventilation in which no respiratory exchange occurred. With kno...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 2005
ISSN: 0007-0912
DOI: 10.1093/bja/aei212