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ventilation of the equine lung has a vertical distribution that is paralleled by a perfusion gradient, and there are regional differences in pulmonary vascular mechanics that are controlled by local factors and mechanisms, such as hypoxic pulmonary
expiratory airway closure and atelectasis formation. 3 – 5 Impaired pulmonary gas exchange is a common pathological finding in anesthetized horses, and it has been associated with worse outcomes. 6 Optimizing ventilation and gas exchange is therefore a
reasons anesthetists routinely advocate the use of mechanical ventilation to prevent any such hypoventilation and associated hypercapnia and its consequences on the acid-base balance. It remains unclear whether mechanical ventilation is necessary for very
A rterial blood gas (aBG) evaluation is a point-of-care diagnostic test used to evaluate oxygenation, ventilation, and acid-base balance in critically ill patients, particularly dogs. The partial pressure of oxygen in arterial blood (Pa o 2 ) is
these lung fields results in small airway collapse, but continued preferential perfusion leads to a significant VQ mismatch. This causes right to left pulmonary shunting, measuring as much as 33% of cardiac output (CO). 8 Several ventilation strategies
respiratory rate with prolonged periods of apnea. 1,6,7 Anesthetized horses with the irregular ventilatory rhythm combined with the increase in Pa co 2 often benefit from intermittent positive pressure ventilation; however, this intervention may cause a
Positive-pressure ventilation provides artificial support of lung function and is becoming a standard of care in many veterinary intensive care units. In addition to understanding the principles of mechanical ventilation, provision of PPV requires
transported with manual ventilation. At the specialty hospital, ventilation was continued with a volume-controlled, time-cycled, pressure-limited anesthetic ventilator. a Methylprednisolone sodium succinate (10 mg/kg [4.5 mg/lb], IV) and mannitol (500 mg
-lung ventilation (OLV) and the presence of large masses or adhesions that reduce visibility. During thoracoscopic surgery, OLV is one of the most important procedures for increasing working space. The endobronchial blocker (EBB) and double-lumen endotracheal
both perfusion and ventilation, is commonly decreased in anesthetized horses as a direct result of the cardiovascular and respiratory depressant effects of volatile anesthetics and the physical effect of recumbency. 4 Decreased tissue perfusion, which
