Ventilatory Muscle Fatigue and Failure

摘要: The importance of respiratory, chiefly inspiratory, muscle fatigue has become well recognized in the last decade. If inspiratory muscles fail, so does ventilation. Neuromuscular had previously been defined as inhability to maintain required or expected force power output, which follows a sustained muscular contraction and is reversible by rest. In this regard, inability continue generate sufficient pressure for an adequate alveolar Recently, definition revised; it condition there loss capacity developing and/or velocity muscle, resulting from activity under load rest [1]. According definition, may be present at time considerably preceding point unable perform particular task (exhaustion failure). applying concept muscles, one concludes that they fatigued before hypercapnia (task failure) due inadequate Furthermore, now clear during dynamic contractions maximum shortening often change independently, whereas previous implied output necessarily parallel. Fatigue should distinguished weakness, rested decreased [1], although presence such weakness predispose fatigue.