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Anesth Analg 2005;101:1816-1820
© 2005 International Anesthesia Research Society
doi: 10.1213/01.ANE.0000182329.02880.83

OBSTETRIC ANESTHESIA

Circulating Mature Adrenomedullin Is Related to Blood Volume in Full-Term Pregnancy

Yukio Hayashi, MD*, Hiroshi Ueyama, MD*, Takashi Mashimo, MD*, Kenji Kangawa, PhD{dagger}, and Naoto Minamino, PhD{dagger}

*Department of Anesthesiology, Osaka University Faculty of Medicine; and {dagger}Japan and Research Institute, National Cardiovascular Center, Suita, Osaka, Japan

Address correspondence and reprint requests to Yukio Hayashi, MD, Department of Anesthesiology, Osaka University Faculty of Medicine (D-7), 2-2 Yamada-oka, Suita, Osaka 565–0871, Japan. Address e-mail to yhayashi{at}anes.med.osaka-u.ac.jp.

Plasma adrenomedullin concentration increases during pregnancy. We measured blood volume and mature adrenomedullin concentration in plasma and cerebrospinal fluid and examined whether mature adrenomedullin in plasma and cerebrospinal fluid was associated with increasing blood volume during pregnancy. We enrolled 47 women undergoing surgery with spinal anesthesia in this study. We first measured mature adrenomedullin concentration in plasma and cerebrospinal fluid of nonpregnant women undergoing orthopedic surgery, pregnant women between 15 and 18 wk of gestation undergoing gynecological surgery, and pregnant women at full-term undergoing cesarean delivery. The second study included 20 healthy and full-term parturients scheduled for cesarean delivery. We measured arterial blood pressure and blood volume by noninvasive pulse spectrophotometry using indocyanine green. Plasma-mature adrenomedullin concentration was 1.24 ± 0.98, 2.79 ± 1.23, 4.79 ± 2.61 fmol/mL (mean ± sd) in the nonpregnant, the early gestation, and the full-term groups, respectively. But in cerebrospinal fluid, mature adrenomedullin did not significantly increase. Furthermore, mature adrenomedullin in plasma, but not cerebrospinal fluid, had a significant correlation with blood volume per unit body weight (r2 = 0.46; P = 0.0009). These findings demonstrate that plasma-mature adrenomedullin concentration increased and that increased plasma-mature adrenomedullin is associated with increased blood volume during pregnancy.




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[Abstract] [Full Text] [PDF]


Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2005 by the International Anesthesia Research Society.