| The Effects of Postural Change on Hemodynamics. |
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Jong Jin Sun, Geum Rhyang Wee, Chan Jin Park, Sung Su Chung |
1Department of Anesthesiology, Chonnam National University Medical School, Kwang-ju, Korea.
2Department of Anesthesiology, Chonnam National University College of Dentistry, Kwang-ju, Korea. |
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| Abstract |
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The purpose of this study was to evaluate the effect of postural change on hemodynamics under halothane-N2O-O2 anesthesia. The authors measured heart rate (HR), mean arterial pressure (MAP), central venous pressure (CVP), mean pulmonary artery pressure (PVP), and cardiac index (C1) on supine position (baseline), and after a postural change to the lithotomy, head up tilt (5, 10, 15 degress) and head down tilt (5, 10, 15 degrees) positions in 10 healthy subjects. The results were as follows: 1) After a postural change to the lithotomy position, all hemodynamic variables revealed no changes. 2) After a change to the head up position, MAP, CVP, PAP, PCWP, and CI decreased significantly, while HR remained unchanged. 3) After a change to the head down position, CVP, PAP, PCWP, and CI increased and HR decreased significantly, while MAP remained unchanged. From the above results, it might be concluded that a down ward tilt of 10 degrees is most the appropriate position to restore hemodynamics in the presence of cardiovascular instability. |
| Key Words:
Position; Hemodynamics |
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