Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 207

 The lung receives blood from two circulations, the pulmonary artery and the bronchial artery.

 The pulmonary artery receives the total output of the right ventricle, and perfuses the alveolar capillaries.

 The bronchial artery is a branch of the aorta and perfuses the parenchymal structures of the lung (e.g. airways).

 The pulmonary arterial systolic, diastolic, and mean pressures in the horse average 42, 18, and 22 mmHg, respectively. This indicates a low vascular resistance compared to the systemic circulation.

 For gas exchange to occur across an alveolar membrane, the alveoli must be perfused. Optimal gas exchange occurs when the alveolar ventilation and blood flow are equally distributed in the lung.