Hypoxia exaggerates inspiratory accessory muscle deoxygenation during hyperpnoea
| Autor: | Toshiyuki Ohya, Masako Hoshikawa, Marie Oriishi, Yasuhiro Suzuki, Koji Ishida, Yuka Itoh, Keisho Katayama |
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| Rok vydání: | 2015 |
| Předmět: |
Male
Pulmonary and Respiratory Medicine Vital capacity Respiratory rate Physiology Electromyography Electrocardiography Hemoglobins Young Adult Hyperventilation Tidal Volume medicine Respiratory muscle Humans Hypoxia Tidal volume Spectroscopy Near-Infrared medicine.diagnostic_test Myoglobin Chemistry General Neuroscience Accessory muscle Hypoxia (medical) Respiratory Muscles Oxygen Inhalation Spirometry Anesthesia medicine.symptom |
| Zdroj: | Respiratory Physiology & Neurobiology. 211:1-8 |
| ISSN: | 1569-9048 |
| DOI: | 10.1016/j.resp.2015.02.005 |
| Popis: | The purpose of this study was to elucidate inspiratory accessory muscle deoxygenation and myoelectric activity during isolated volitional hyperpnoea under hypoxic conditions. Subjects performed voluntary isocapnic hyperpnoea (tidal volume=30-40% of forced vital capacity, breathing frequency=60 breaths/min) in normoxia [inspired gas fraction (FIO₂)=0.21] and hypoxia (FIO₂). Muscle deoxyhemoglobin/myoglobin (Deoxy-Hb/Mb) and muscle oxygen saturation (SMO₂) using near-infrared spectroscopy and surface electromyography were measured from sternocleidomastoid (SCM) and intercostal (IC) muscles. During hyperpnoea, increases in Deoxy-Hb/Mb and reductions of SMO₂ in the SCM and IC muscles were larger (P |
| Databáze: | OpenAIRE |
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