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Ryuji Hori1,2, Rika Ishida,1 Masaaki Isaka,3 Takahito Nakamura,4 Yoshitaka Oku51Department of Physical Therapy, Morinomiya University of Medical Science, Suminoe-ku, Osaka 559-8611, Japan; 2Department of Rehabilitation, Hoshigaoka Medical Center, Hirakata, Osaka 573-8511, Japan; 3Department of Physical Therapy, Osaka Yukioka College of Health Science, Ibaraki, Osaka 567-0801, Japan; 4Center of Respiratory Disease, Hoshigaoka Medical Center, Hirakata, Osaka 573-8511, Japan; 5Department of Physiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, JapanPurpose: As shown in our previous study, inspiration after swallowing (SW-I) increases during the bi-level positive airway pressure ventilation (BiPAP) in healthy subjects because swallowing-associated non-inspiratory flow (SNIF) triggers inspiratory support, while SW-I during continuous positive pressure ventilation (CPAP) is rare. In the present study, we evaluated the coordination between breathing and swallowing during spontaneous breathing, BiPAP, and CPAP in patients with chronic obstructive pulmonary disease (COPD).Patients and methods: This study is a prospective intervention study at the Hoshigaoka Medical Center (November 01, 2015–April 30, 2018). We simultaneously recorded the respiratory flow, laryngeal motion, and swallowing sounds during saliva swallowing in patients with COPD. We estimated the respiratory phase after swallowing, frequency of SNIF, the duration of the respiratory pause during swallowing, and timing of swallowing in the respiratory cycle and compared these parameters among control, CPAP, and BiPAP conditions.Results: The expiration after swallowing (SW-E) frequency was associated with the occurrence of SNIF (p |
