Objective To explore the effect of N2O with High Intensity Focused Ultrasound (HIFU) on SKVO3 through observing the influence of HIFU and N2O, separated and combined, on SKVO3. Methods The cultured SKVO3 cells were divided into 4 group: control group: without any treatment; N2O group: blowed by N2O 60 minutes; HIFU group: irradiated by HIFU (250W, 5s) and N2O-HIFU group blowed by N2O 60 minutes and irradiated by HIFU (250W, 5s). Flow cytometric method and Annexin V-FITC/PI binding assay were applied to detect cell death and apoptosis, and western blot test to detect Cytochrome C, Capase 3, Bax, Bcl-2 and GAPDH. Results The cell death and apoptosis in N2O-HIFU group were significant higher than those in other groups(P < 0.05). The results of western blot showed that in N2O-HIFU group, CytochromeC, Caspase 3 and Bax increased remarkably, but Bcl-2 significantly suppressed. Conclusion HIFU combininh with N2O could enhance the killing of SKVO3 cell.

Objective To observe the effect of nitrous oxide (N2O) on the content of serum free hemoglobin ,and intercellular adhesion molecule‐1 (ICAM‐1) of patients with HIFU Therapy ,and investigate its action of tissue damage mechanism .Methods 50 patients with primary liver cancer undergoing HIFU surgery (ASA Ⅰ - Ⅱ class) were randomly divided into control group (group C) and experimental group(group N) ,25 patients of each group .General anesthesia method was used in both two groups , group C was by total intravenous anesthesia ,group N was adopted intravenous‐inhalation anesthesia .both two groups was adopted the same anesthesia induction method .anesthesia maintain of group N was joined N2 O on the basis of group C .both two groups were draw blood from the radial artery at the points of before anesthesia (T1 ) ,before operation (T2 ) ,1 h (T3 ) ,2 h (T4 ) ,3 h (T5 ) after intraoperative ,and 24 h after operation (T6 ) ,peroxidase reaction test and double antibody sandwich ELISA method were a‐dopted to detect the content of Fhb value and ICAM‐1 ;ultrasonography system of HIFU therapeutic instrument was used to meas‐ure the abdominal wall thickness of patients before and after operation .Results The content of FHb and ICAM‐1 in serum were significantly increased after operation than before with the anesthesia time (P<0 .05);compared with group C ,group N increased obviously at the same point in time (P<0 .05);preoperative and postoperative abdominal wall thickness value of group N was in‐creased significantly (P< 0 .05) .Conclusion It may be connected with N2 O enhanced ultrasound cavitation effect that the body produces more FHb and ICAM‐1 of group N in HIFU treatment ,and induces abdominal wall skin markedly swollen .