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The Japanese journal of surgery

, Volume 18, Issue 1, pp 1–6 | Cite as

Variations in the disappearance rate of indocyanine grenn

  • Ken-ichi Kumazawa
  • Tomomitsu Kikuchi
  • Toshinori Oishi
  • Hisamoto Nakajima
  • Seiji Ohigashi
  • Hiroyuki Kato
  • Tetsuro Kajiwara
  • Noburu Sakakibara
Original Articles
  • 21 Downloads

Abstract

Time-associated changes in the disappearance rate of indocyanine green from the blood (K·ICG) as an index of liver function, were studied. Blood was drawn 5 times at 3-minute intervals from 31 patients. Early, intermediate, and late K·ICG values were 0.087±0.040, 0.082±0.038, and 0.076±0.033 min−1, respectively, showing serial decreases. When blood was drawn 8 times at 2-minute intervals from 22 other patients, the means of the K·ICG values at 11 time points showed a nearly linear relationship (r=−0.986). These findings indicated that K·ICG is approxomated by a linear function of time, K(t)=−K′·t+K0. According to this function, K·ICG is considered to decrease by 1.96% every minute. The K·ICG value determined by the conventional method is, therefore, a mean disappearance rate of 15 minutes, and K0 is considered to reflect the initial reaction speed.

Key Words

indocyanine green ICG disappearance rate liver function tests 

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Copyright information

© The Japan Surgical Society 1988

Authors and Affiliations

  • Ken-ichi Kumazawa
    • 1
  • Tomomitsu Kikuchi
    • 1
  • Toshinori Oishi
    • 1
  • Hisamoto Nakajima
    • 1
  • Seiji Ohigashi
    • 1
  • Hiroyuki Kato
    • 1
  • Tetsuro Kajiwara
    • 1
  • Noburu Sakakibara
    • 1
  1. 1.Department of Surgery, Tokyo Women's Medical CollegeDaini HospitalTokyoJapan

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