Bioelectrical impedance may predict cell viability during ischemia and reperfusion in rat liver.
Ischemia and reperfusion (I/R) injury is a major cause of hepatic failure after liver surgery, but no method could monitor or predict it real-time during surgery. We measured bioelectrical impedance (BEI) and cell viability to assess the usefulness of BEI during I/R in rat liver. A 70% partial liver ischemia model was used. BEI was measured at various frequencies. Adenosine triphosphate (ATP) content, and palmitic acid oxidation rate were measured, and histological changes were observed in order to quantify liver cell viability. BEI changed significantly during ischemia at low frequency. In the ischemia group, BEI increased gradually during 60 min of ischemia and had a tendency to plateau thereafter. The ATP content decreased below 20% of the baseline level. In the I/R group, BEI recovered to near baseline level. After 24 hr of reperfusion, the ATP contents decreased to below 50% in 30, 60 and 120 min of ischemia and the palmitic acid metabolic rates decreased to 91%, 78%, and 74%, respectively, compared with normal liver. BEI may be a good tool for monitoring I/R during liver surgery. The liver is relatively tolerant to ischemia, however after reperfusion, liver cells may be damaged depending upon the duration of ischemia.
Cui
Mei Lan
ML
Research Institute of Biomedical Engineering, College of Medicine, Yeungnam University, Daegu, Korea.
Ahn
Hyun Soo
HS
Kim
Jong Yeon
JY
Shin
Hyoun Jin
HJ
Lee
Dong Shik
DS
Kim
Hong Jin
HJ
Yun
Sung Su
SS
D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D002470:Cell Survival; D017097:Electric Impedance; D004734:Energy Metabolism; D007511:Ischemia / Q000378:metabolism*; D008099:Liver / Q000378:metabolism* / Q000473:pathology; D008297:Male; D010168:Palmitates / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D015424:Reperfusion; D015427:Reperfusion Injury / Q000378:metabolism / Q000473:pathology
D010168:Palmitates; D000255:Adenosine Triphosphate