منابع مشابه
Ventilation and Gas Exchange during Shallow Hypothermia in Pigeons
Ventilatory control of the composition of the gases in the air sacs was studied during entry into fasting-induced, shallow, nocturnal hypothermia in the domestic pigeon (Columba livia). Respiratory frequency (/), tidal volume (Vi) and oxygen uptake (VcO were recorded simultaneously in six pigeons; partial pressures of CO2 and O2 in the abdominal and interclavicular air sacs were measured in sev...
متن کاملPulmonary circulation and ventilation.
The pulmonary circuit receives the whole of the cardiac output, and the flow through it is governed by events in the systemic circulation. Its function is gaseous exchange, and the low resistance and high capacitance of the circuit is subservient to this function. Local flow is affected by intra-alveolar oxygen tensions and regional flow by passive hydrostatic effects due to gravity. The distri...
متن کاملIntratracheal Pulmonary Ventilation
Study objective: The pulmonary parenchyma in patients with acute respiratory failure (ARF) is commonly not involved in a homogenous disease process. Conventional mechanical ventilation (MV) at elevated positive end-expiratory pressure (PEEP) and peak inspiratory pressure (PIP) aims at recruiting collapsed or nonventilated lung units. Invariably, those pressures are also transmitted to the healt...
متن کاملThe Relaxants and Pulmonary Ventilation.
In health the arterial blood carbon dioxide tension (PaC02) of the resting subject is kept constant between about 36 and 44 mm Hg and the arterial pH also shows little variation (pH 7.36 to 7.44). All the techniques used in general anaesthesia tend to cause variations from these normal limits and techniques involving the use of the relaxants are no exception to this rule. The relaxants reduce v...
متن کاملDifferential ventilation in unilateral pulmonary artery occlusion.
A case is reported of complete isolated occlusion of the right pulmonary artery resulting in underperfusion of the right lung; this was confirmed radiographically and at thoracotomy. Bronchospirometry showed that there was a reduction of ventilation to the right lung. When this lung alone was supplied with a carbon dioxide rich mixture there was a shift of ventilation towards the normal pattern...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 1960
ISSN: 0022-5223
DOI: 10.1016/s0022-5223(20)31836-5