Mj. Tunon et al., Liver blood flow changes during laparoscopic surgery in pigs - A study of hepatic indocyanine green removal, SURG ENDOSC, 13(7), 1999, pp. 668-672
Citations number
46
Categorie Soggetti
Surgery
Journal title
SURGICAL ENDOSCOPY-ULTRASOUND AND INTERVENTIONAL TECHNIQUES
Background: Physiological effects caused by abdominal insufflation in the c
ourse of laparoscopic surgery are partially unknown. The purpose of the pre
sent study was to determine if indocyanine green (ICG) pharmacokinetic para
meters, as an index of hepatic blood flow, change during laparoscopic surge
ry in the presence of a CO2 pneumoperitoneum. This effect could cause impor
tant alterations in the kinetics of anesthetic drugs.
Methods: Eighteen female pigs were anaesthetized under constant ventilation
and randomly assigned to three groups undergoing insufflation with CO2 (I)
laparoscopic oophorectomy with CO2 pneumoperitoneum (LS), or oophorectomy
by open surgery (OS). CO2 pneumoperitoneum was performed at 14 mmHg. ICG (1
mg/kg) was injected into a marginal vein on two separate occasions: 30 min
before and 30 min after the start of insufflation or surgery. Blood was sa
mpled from the carotid artery at time intervals after the injection of ICG
and after pharmacokinetic parameters were obtained by a computer program.
Results: The area under the curve (AUC(0-infinity)) indicated important dis
functions in ICG availability in all three groups of animals, with signific
ant increases of 104%, 82%, and 48% for groups I, LS, and OS, respectively.
The ICG apparent half-life did not significantly change in group OS, but i
t rose in groups I (+17%) and LS (+28%). ICG clearance was significantly re
duced by 32% in group OS and to a larger extent in groups I and LS (-45% an
d -46%, respectively).
Conclusion: These findings confirm the contribution of CO2 pneumoperitoneum
to decreased liver blood flow during laparoscopic surgery.