After upper abdomen surgery, respiratory muscle dysfunction is well recognised. After laparotomy and even laparoscopy, maximum static inspiratory and expiratory pressures are lowered, and recovery can take several days. A variety of reasons have been implicated in such respiratory muscle dysfunction, including irritation and inflammation, as well as injuries near the diaphragm, resulting in local mechanical failure, reflex inhibition, and pain.
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Forced vital capacity (FVC)
Timeframe: 8 weeks