[The hemodynamic changes during the intraperitoneal hyperthermic perfusion under induced hypothermia]

We investigated the whole body oxygen consumption (VO2) and the hemodynamic changes during the intraperitoneal hyperthermic perfusion (IPHP), which was coupled with induced hypothermia to prevent the cerebral disorder. IPHP was carried out for 90-120 min with 45-47 degrees C perfusate after the operation. We induced hypothermia using the surface cooling method and the infusion of triflupromazin. In no patient, the pulmonary artery temperature (PAT) rose above 40 degrees C. In the IPHP, there was a significant correlation between VO2 and PAT. If PAT reached 42 degrees C during the IPHP, VO2 would increase to 130-140% of the value at 37-38 degrees C. This rise is smaller than that during the total body hyperthermia (TBH), in which VO2 at 42 degrees C reached 130-190% of the value at 38 degrees C. Heart rate increased in proportion to the rising rate of body temperature. During the IPHP, PAT sometimes rose remarkably about 8 degrees C (from 32 degrees C to 40 degrees C) with a marked rise in heart rate. This rising rate of PAT is greater than that of TBH, in which PAT rose about 4-5 degrees C (from 37-38 degrees C to 42 degrees C). We consider that IPHP is not applicable to the patients with ischemic heart disease. During the rise of PAT, other circulatory parameters related to IPHP, changed in the same direction as those related to TBH. The rate of change of these parameters related to IPHP was smaller than that of the TBH, because during the IPHP the highest PAT was lower than that during TBH.