نتایج جستجو برای: alveolar dead space
تعداد نتایج: 572458 فیلتر نتایج به سال:
Oxygenation using High Flow Nasal Cannula (HFNC) was initially described in neonatal medicine, but, gradually, its use has extended to adult patients. The efficacy of the device has been linked to higher flows of oxygen delivered to the patients, air tract humidification, alveolar recruitment through a positive end-expiratory pressure (PEEP) effect, prevention of nasopharyngeal collapse, and de...
Exercise ventilation-CO2 output relationship in COPD and heart failure: a tale of two abnormalities.
Ventilatory gas exchange measurements have been increasingly accepted as an integral part of cardiopulmonary exercise testing by pulmonologists1-3 and more recently by cardiologists.4,5 A particularly useful measure is the total ventilation (minute ventilation [V̇E]) versus metabolic CO2 output (V̇CO2) relationship obtained with incremental exercise from rest to maximal exercise. In healthy subje...
Following extensive surgical debridement in the treatment of infection, a "dead space" can result following surgical closure that can fill with hematoma, an environment conducive to bacterial growth. The eradication of dead space is essential in order to prevent recurrent infection. This study describes a novel small animal model to investigate dead-space management in muscle tissue. Two absorb...
Recent studies show that nasal high flow (NHF) therapy can support ventilation in patients with acute or chronic respiratory disorders. Clearance of dead space has been suggested as being the key mechanism of respiratory support with NHF therapy. The hypothesis of this study was that NHF in a dose-dependent manner can clear dead space of the upper airways from expired air and decrease rebreathi...
Arterial isocapnia is a hallmark of moderate exercise in humans and is maintained even when resting arterial Pco(2) (Pa(CO(2))) is raised or lowered from its normal level, e.g., with chronic acid-base changes or acute increases in respiratory dead space. When resting ventilation and/or Pa(CO(2)) are altered, maintenance of isocapnia requires active adjustments of the exercise ventilatory respon...
OBJECTIVE To determine if peripheral intravenous cannula dead space is taken into account when setting up intravenous infusions (in particular nitrate infusions) in the emergency department. METHOD A postal survey of UK emergency departments. RESULTS Of the 143 (58%) of UK departments who responded, only 15% reported priming the cannula before commencing the nitrate infusion. CONCLUSIONS ...
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