title: Determination of the standard value of circulating blood volume during anesthesia using pulse dye-densitometry: a multicenter study in Japan.
abstract: OBJECTIVE
  The standard value for circulating blood volume (BV) during anesthesia was determined by a multicenter study in Japan. The significance of BV on the reduction of blood pressure after the induction of anesthesia was also examined.
  
  
  METHODS
  The study included 184 patients from eight university hospitals. After the induction of anesthesia, pulse dye-densitometry was performed according to a uniform protocol. Factors contributing to reduced blood pressure after induction of anesthesia were examined by multiple logistic regression analysis.
  
  
  RESULTS
  The mean and standard deviation of BV was 80.0 +/- 13.9 ml x kg(-1); for females and 84.2 +/- 15.3 ml x kg(-1) for males (P > 0.05). There was no age difference in terms of BV. After adjusting for the effects of height, weight, and age, the factors predisposing to a reduction in blood pressure of >20 mmHg after induction of anesthesia were found to be age (P < 0.01) and BV (ml x kg(-1)) (P < 0.001).
  
  
  CONCLUSIONS
  We determined the BV of anesthetized patients before surgery in Japan using pulse dye-densitometry. It is suggested that age is not a factor regarding BV, and that blood pressure tends to be reduced in hypovolemic patients after induction of anesthesia.
authors: Department of Anesthesiology, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, 181-8611, Japan.
authors: Takehiko
authors: T
authors: Iijima
authors: Hiroshi
authors: H
authors: Ueyama
authors: Yoshiyuki
authors: Y
authors: Oi
authors: Isao
authors: I
authors: Fukuda
authors: Hironori
authors: H
authors: Ishihara
authors: Hikaru
authors: H
authors: Kohase
authors: Yoshifumi
authors: Y
authors: Kotake
authors: Kaoru
authors: K
authors: Koyama
authors: Hideki
authors: H
authors: Miyao
authors: Naoki
authors: N
authors: Kobayashi
mesh_terms: D000328:Adult; D000758:Anesthesia; D001794:Blood Pressure / Q000502:physiology; D001810:Blood Volume / Q000502:physiology*; D001811:Blood Volume Determination / Q000379:methods / Q000592:standards*; D004396:Coloring Agents; D003720:Densitometry / Q000379:methods / Q000592:standards*; D004395:Dye Dilution Technique; D005260:Female; D006439:Hemodynamics / Q000502:physiology; D006785:Hospitals, University; D006801:Humans; D007208:Indocyanine Green / Q000009:adverse effects; D007564:Japan; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012727:Sex Characteristics
chemical_list: D004396:Coloring Agents; D007208:Indocyanine Green