Physiotherapist performance during manual chest vibration in simulated adult lung: frequency, force and pattern
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Abstract
Previous studies of manual chest wall vibration (MV) usually reported frequency, compression force, and peak expiratory flow rate, not covering the MV qualityF factors. Therefore, this study explored the physiotherapist's performance during MV, including frequency, compression force, force oscillation amplitude (COA), pattern of compression and oscillation, duration of MV, and upper body fatigue score. We recruit 41 physiotherapists with experience in cardiopulmonary (≥ 1 year). They performed two-hand and one-hand Mvs 5 times each on an artificial lung model. The result showed that MV frequency, compression force, and COA around 10.4 (range 5.4-19.6) Hz, 4.5 (range 0.9-34.4) Kg, 1.5 (0.2-9.7) by two-hand MV, respectively, and, 10.5 (6.4-14.9) Hz, 3.3 (0.5-23.2) kg, and 1.0 (0.2-7.9) kg for one-hand MV, respectively. Most physiotherapists (90.2%) used two-hand MV in routine service, and 58 % performed a simultaneous compression with oscillation. Thirteen % performed MV without compression. The common MV duration is 5-6 sec. Five consecutive MVs slightly increased the fatigue. Within the sensible limit of evidence, we suggest that the physiotherapist can adjust compression force, starting volume related to the initial time of compression and oscillation, frequency, and COA. There may be essential factors that affect the physical property of the MV technique.
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