1 Maximum static inspiratory and expiratory mouth pressures are the most commonly performed tests of respiratory muscle strength.
2Transdiaphragmatic pressure----Calculated by subtracting endoesophageal pressure from gastric pressure.
3Phrenic nerve stimulation test----Most commonly employed technique ofelectrophrenic stimulation employs a frequency of one pulse per second to measure transdiaphragmatic contraction during
4 Analysis of rib cage and abdomen for paradoxical inward motion.
5Spirometry----A decrease in vital capacity greater than 25 percent on moving from upright to supine posture is a sign of diaphragmatic weakness.
6ABG---Paco2 increases when respiratory muscle strength is less than 50 percent of the predicted value.
7MVV is an index of respiratory muscle strength in presence of normal expiratory flow ratesn
2Transdiaphragmatic pressure----Calculated by subtracting endoesophageal pressure from gastric pressure.
3Phrenic nerve stimulation test----Most commonly employed technique ofelectrophrenic stimulation employs a frequency of one pulse per second to measure transdiaphragmatic contraction during
4 Analysis of rib cage and abdomen for paradoxical inward motion.
5Spirometry----A decrease in vital capacity greater than 25 percent on moving from upright to supine posture is a sign of diaphragmatic weakness.
6ABG---Paco2 increases when respiratory muscle strength is less than 50 percent of the predicted value.
7MVV is an index of respiratory muscle strength in presence of normal expiratory flow ratesn
