-
- YOSHIZAKI H.
- Department of Physiology II, School of Medicine, Chiba University
-
- YOSHIDA A.
- Department of Physiology II, School of Medicine, Chiba University
-
- HAYASHI F.
- Department of Physiology II, School of Medicine, Chiba University
-
- FUKUDA Y.
- Department of Physiology II, School of Medicine, Chiba University
書誌事項
- タイトル別名
-
- Effect of Posture Change on Control of
この論文をさがす
抄録
To clarify the control mechanism of ventilation during posture change, ventilatory parameters, PETCO<SUB>2'</SUB> and ventilatory response to CO2 were examined in 11 healthy male subjects at supine (0°) and 75° head-up tilt positions. Minute expiratory ventilation (VE), tidal volume (VT), respiratory frequency (f), end-tidal and transcutaneous PCO2 and CO2 output (VCO2), and ventilatory response to CO2 were measured during a steady state condition. VE (VA) and VT increased significantly at 75° tilt with significant decrease in PETCO<SUB>2</SUB> from 40.1 mmHg (0°) to about 36.1 mmHg (75°). Transcutaneous PCO2 also decreased during tilt, by 3.3 mmHg. Physiological dead space (VD/VT) and VCO2, however, remained unchanged, and ventilatory equivalent (VE/VCO2, VA/VCO2) increased significantly. The CO2-ventilatory response curve shifted upward (or leftward) without significant change in the response slope. At 75° tilt, EMG activity of gastrocnemius muscle increased. These findings suggested that PETCO<SUB>2</SUB> decreased because of increased VE (VA) with a leftward shift of CO2-ventilatory response curve. Various signals such as afferents from lower extremities might have net stimulatory effects on a CO2-ventilation control system to reset the controlled level of PETCO<SUB>2</SUB> to a lower range, but without significant change in CO2-ventilatory response during upright position.
収録刊行物
-
- The Japanese Journal of Physiology
-
The Japanese Journal of Physiology 48 (4), 267-273, 1998
一般社団法人 日本生理学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390001205043028864
-
- NII論文ID
- 130004435676
- 30015529382
- 10008304947
-
- NII書誌ID
- AA00691224
-
- COI
- 1:STN:280:DyaK1cvjsVKgsw%3D%3D
-
- ISSN
- 18811396
- 0021521X
-
- NDL書誌ID
- 4569912
-
- PubMed
- 9757143
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可