Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 203

 At the completion of a tidal volume breath, the lung does not empty. The volume of gas remaining in the lung is referred to as the FRC (see Figure 4.2).

 The volume of the FRC is important as it acts as a reservoir for gas exchange and is estimated at 51 ml/kg in the horse.

 A reduction in FRC alters lung mechanical properties (see pulmonary compliance below) as well as increasing pulmonary vascular resistance.

 In the horse, the FRC is reduced with recumbency and general anesthesia.

 If the FRC is very low, one can see from the shape of the pressure‐volume curve (see Figure 4.3), that the change in lung volume for a given change in pressure is very small.