Masafumi Nozoe1, Kyoshi Mase2, Akimitsu Tsutou3. 1. Department of Rehabilitation, Hyogo College of Medicine Sasayama Medical Center Kurooka 5, Sasayama, Hyogo, 669-2321 Japan ; Division of Preventive Health Sciences, Department of Community Health Sciences, Faculty of Health Sciences, Kobe University Graduate School of Health Sciences. 2. Department of Physical Therapy, Faculty of Nursing and Rehabilitation, Konan Women's University. 3. Division of Preventive Health Sciences, Department of Community Health Sciences, Faculty of Health Sciences, Kobe University Graduate School of Health Sciences.
Abstract
PURPOSE: The purpose of this study is to investigate the regional chest wall volume changes during various breathing maneuvers in normal men with an optical reflectance system (OR), which tracks reflective markers in three dimensions. METHODS: Chest wall volume was measured by the OR system [VL(CW)], and lung volume was measured by hot wire spirometry [VL(SP)] in 15 healthy men during quiet breathing (QB), during breathing at a rate of 50 tidal breaths/min paced using a metronome (MT: metronome-paced tachypnea), and during a maximal forced inspiratory and expiratory maneuver (MFIE maneuver). RESULTS: There were few discrepancies between VL(CW) and VL(SP) for QB and MT. In the MFIE maneuver, however VL(CW) was often underestimated compared with VL(SP), particularly during forced maximal expiration, because of pulmonary rib cage volume changes. Furthermore, the regional chest wall volume changes were affected by breathing maneuver alternation. In the pulmonary and abdominal rib cage, inspiratory reserve volume was larger than expiratory reserve volume, respectively, and in the abdomen, expiratory reserve volume was larger than inspiratory reserve volume. CONCLUSION: Alternation of breathing maneuvers affects regional chest wall volume changes.
PURPOSE: The purpose of this study is to investigate the regional chest wall volume changes during various breathing maneuvers in normal men with an optical reflectance system (OR), which tracks reflective markers in three dimensions. METHODS: Chest wall volume was measured by the OR system [VL(CW)], and lung volume was measured by hot wire spirometry [VL(SP)] in 15 healthy men during quiet breathing (QB), during breathing at a rate of 50 tidal breaths/min paced using a metronome (MT: metronome-paced tachypnea), and during a maximal forced inspiratory and expiratory maneuver (MFIE maneuver). RESULTS: There were few discrepancies between VL(CW) and VL(SP) for QB and MT. In the MFIE maneuver, however VL(CW) was often underestimated compared with VL(SP), particularly during forced maximal expiration, because of pulmonary rib cage volume changes. Furthermore, the regional chest wall volume changes were affected by breathing maneuver alternation. In the pulmonary and abdominal rib cage, inspiratory reserve volume was larger than expiratory reserve volume, respectively, and in the abdomen, expiratory reserve volume was larger than inspiratory reserve volume. CONCLUSION: Alternation of breathing maneuvers affects regional chest wall volume changes.
Authors: Gene Yong-Kwang Ong; Aloysius Jian Feng Ang; Amirzeb S O Aurangzeb; Elisabeth Sue Shuen Fong; Jun Yuan Tan; Zhao Jin Chen; Yiong Huak Chan; Phua Hwee Tang; Jen Heng Pek; Ian Maconochie; Kee Chong Ng; Vinay Nadkarni Journal: Resusc Plus Date: 2021-03-27
Authors: Gene Yong-Kwang Ong; Aloysius Jian Feng Ang; Zhao Jin Chen; Yiong Huak Chan; Phua Hwee Tang; Elisabeth Sue Sheun Fong; Jun Yuan Tan; AmirZeb S O Aurangzeb; Jen Heng Pek; Ian Maconochie; Kee Chong Ng; Vinay Nadkarni Journal: Resusc Plus Date: 2022-01-20