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《Journal of Peking University(Health Sciences)》 2008-02
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Experimental study of hepatic bloodflow to the effect of cryoablation

GUO Zhi, NI Hong, HU Yong-hua, XING Wen-ge, LIU Fang (Intervention Radiation Department, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060)  
Objective: To investigate the bloodflo w of hepetatic artery to the effe ct of cryoablation. Methods:Twenty dogs were divided into four groups ra ndomly accor ding to hepatic artery blood flow: completely occlusion of the hepatic artery(A ),partal occlusion of the hepatic artery(B),increasing the hepatic artery blo od flow(C) ,and no occlusion(D). Two areas of necrosis near portal hepatis (a)and far from it (b)were created in each of the 20 dog livers. Ultrasound was used to measure the blood flow. After cryoablation, the animals were euthanized, the livers were examined and the cryoablation areas were separated into two halves,the maximum diameter of necrosis was assessed by vital staining for nicotinam ide adenine dinucleotide (NADH) diaphorase and Triphenyl tetrazolium chloride (T TC) staining. Results: The peak speed and volflow of hepatic artery from group A to group D measured by ultrasound were 0 cm/s and 0 mL/min, (22.8±0.6) cm/s and (31.4±0.9) mL/min,(99.6±1.6) cm/s and (70.4±1.5) mL/min,and (69.5±0.7 ) cm/s and (52.6±1.2) mL/min, respectively. The mean longest diameter of ice-ball in areas a from group A to group D were (4.5±0.4) cm,(3.5±0.1) cm,(2.0±0.3) cm,(2.6 ±0.2) cm;and the areas b were (4.6±0.3) cm,(3.6±0.2) cm,(1.9±0.1) cm,(2. 6±0.2) cm;the mean longest necroseis diameter in TTC staining in areas a were (4.0±0.3) cm,(2.7±0.2) cm, (2.0±0.2) cm, (2.3±0.1) cm;and in areas b wer e (3.9±0.3) cm, (2.6±0.3) cm, (2.1±0.1) cm,(2.5±0.2) cm;the mean longest necroseis diameter in NADH staining in areas a were (4.1±0.4) cm,(2.6±0.2) c m,(2.1±0.2) cm,(2.3±0.3) cm,in areas b were (4.0±0.3) cm,(2.7±0.3) cm,( 2.1±0.1) cm,(2.4±0.2) cm. Conclusion:The bloodflow of hepeta-tic artery can a ffect the cryoablation rate. When the bloodflow increases, the cryoablation rate decreases.
【Fund】: 天津市自然科学基金资助~~
【CateGory Index】: R735.7
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