Objective To evaluate the legitimate of regional artery infusion chemotherapy in the treatment of gastric carcinoma. Methods　The pharmacokinetics of 5-Fu after different route of administration was studied. Results High concentration of 5-Fu found in portal vein via left-gastric intra-artetial administration were 4-40 folds higher than the group via intravenous administration.The time of high concentrations of 5-Fu via left-gastric intra-arterial administration maintained significantly longer than by intravenous administraion. The concentration of 5-Fu in tumor tissues and paratumorous lymph tissues by intra-arterial administration were 19 times and 23 times of the group by intravenous administration. Conclusion Regional arterial infusion chemotherapy can significantly increase the concentration of chemotherapeutic drugs in the tumorous region.

Objective To evaluate the effect of intraoperative placement of super-selective intraarterial pump and postoperative regional infusion chemotherapeutics for the treatment of laparotomy proved inoperable advanced gastrointestinal cancer. Methods Intraoperatively the major artery supplying the tumor was identified and cannulated with the placement of a pump. Postoperative regional chemotherapy was carried out in 79 cases of gastrointestinal cancer. Among them there were 42 cases of gastric cancer, 37 of colorectal cancer. Results Complete tumor remission was achieved in 1 case, partial remission in 69 cases. This therapy also enabled second stage tumor resection in 11 cases. The total effective rate reached 88.6%. The 1-, 2-, and 3- years' survival rates were 84%,28% and 9%, respectively, averaging the survival period at 20.6 months. Conclusion Super-selective intraarterial pump-insertion and postoperative regional chemotherapy is effective in the treatment of advanced inoperable gastrointestinal cancer.

Objective　To study the effect of regional arterial chemotherapy (RACT) on unresectable gastric carcinoma (URGC). Methods　The clinical data of 100 patients with URGC treated by RACT were retrospectively analysed. Results　In addition to different degree of symptoms improvement, the size of gastric cancer became smaller in 81.2% of the cases, and the survival time of patients had been prolonged (mean 29.5 months). Conclusions　RACT is more effective for treating URGC and worthly of further clinical study.

Objective To evaluate the effect of internal iliac artery and portal vein chemotherapy in preventing local recurrence and hepatic metastasis after radical operation of rectal carcinoma. Methods 96 patients in PLA 309 Hospital with rectal carcinoma undergoing radical resection were divided into 2 groups: Portal vein and iliac artery perfusion chemotherapy group (pump chemotherapy group, 48 cases) and peripheral venous chemotherapy control group (48 cases). Results In the pump chemotherapy group, the 1 , 3 , and 5 year survival rates, local recurrence rate and hepatic metastasis rate were respectively 100%?83%?52%?13%? and 13%, compared with 88%?68%?32%?26% and 28% in control group (all P

Objective To study the effect of regional arterial chemotherapy (RACT) on unresectable gastric carcinoma (URGC). Methods The clinical data of 100 patients with URGC treated by RACT were retrospectively analysed. Results In addition to different degree of symptoms improvement, the size of gastric cancer became smaller in 81 2% of the cases, and the survival time of patients had been prolonged (mean 29 5 months). Conclusions RACT is more effective for treating URGC and worthly of further clinical study.

Through the qualitative study of peritoneal cavity free cancer cells of patients with gastric cancer, to evaluate the rational of exercising intraoperative no touch isolation technique, routine peritoneal and warm perfusion chemotherapy after the operation. 102 patients in PLA 309 Hospital with gastric cancer were included into the study. 100 ml peritoneal fluid were collected respectively before the investigation and before close peritoneal cavity,and rapidly sent for free cancer cells examination. Results: Before the investigation, the positive rate of free cancer cells is 36.3%, and the positive rate before close peritoneal cavity is 52.9%. The free cancer cells positive rate is concerned with tumor infiltration depth, serous membrane infection area and the type of the histopathology。Conclusions: Inside the peritoneal cavity of patients with gastric cancer, free cancer cells are able to survive and have a high degree of activity. Although all kinds of intraoperative no touch isolation technique are used, it still cannot be avoided that some cancer cells will exfoliate and slip into the peritoneal cavity. The wound stimulation during the operation will certainly increase the exfoliation. So, it is quite necessary in the course of operation to adopt no touch isolation technique and to use a great deal of normal saline to give peritoneal cavity lavage. And what's more important is, to give these patients who show positive in the free cancer cell examination perfusion chemotherapy after the operation.

To evaluate the effect of intra arterial infusion chemotherapeutic medicine and immunizator in treatment of later gastro intestinal carcinoma, 86 cases suffering from irremovable gastro intestinal carcinoma were divided into treatment group(group A) and control group (group B). 46 cases in group A were treated with intra arterial chemo immunotherapy, 40 cases in group B were treated only with chemotherapy. Effective rates of group A and group B were 82 6% and 52 5% ( P

Objective To evaluate the effect of selective pump-insertion into the artery during the operation and regional intraarterial chemotherapy postoperatively in the treatment of latter upper gastric cancer. Methods The effect of above treatment on 38 patients suffering from nonresectable latter upper gastric cancer was observed. Results Dysphagia alleviating rate was 100%, abdominal pain mitigating rate 88.5%. Five cases received secondary resection after intraarterial chemotherapy. One-year and two-year survival rates were 71.1% and 21.1% respectively. 3 cases survived more than 3 years. Conclusion Selective pump-insertion into the artery and regional intraarterial chemotherapy is an effective treatment of latter upper gastric cancer, which can prolong the survival period of patients with tumor and increase the resectable rate.

Objective To evaluate the effect of selective pump-insertion into the artery during the operation and regional intraarterial chemotherapy postoperatively in the treatment of latter upper gastric cancer. Methods The effect of above treatment on 38 patients suffering from nonresectable latter upper gastric cancer was observed. Results Dysphagia alleviating rate was 100%, abdominal pain mitigating rate 88.5%. Five cases received secondary resection after intraarterial chemotherapy. One-year and two-year survival rates were 71.1% and 21.1% respectively. 3 cases survived more than 3 years. Conclusion Selective pump-insertion into the artery and regional intraarterial chemotherapy is an effective treatment of latter upper gastric cancer, which can prolong the survival period of patients with tumor and increase the resectable rate.

Objective To observe the multi-slice spiral CT manifestations of cavernous transformation of the portal vein (CTPV) secondary to tumor emboli from hepatocellular carcinoma (HCC). Methods MSCT manifestations of 31 patients of HCC with tumor emboli-induced CTPV proved by operation and pathology were collected and the data were retrospectively analyzed. Results Tumor embolus was detected in both the trunk, left and right branches of PV in 23 patients, accompanied with superior mesenteric vein and/or splenic vein and inferior vena cava's tumor embolus in 4 and infiltration of gallbladder in 1 of 23 patients, as well as in the trunk and left branch in 1, and in the trunk and right branch of PV in 5 patients, accompanied with right hepatic vein and/or inferior vena cava's tumor embolus in 2 and in the portal trunk and superior mesenteric vein in 1, only in the right branch in 1 patient, respectively. Tumor emboli were isodense in plain CT scan, but enhanced with obvious degrees in arterial phase and filling defects in portal venous phase. There were collateral vessels around portal vein. Lateral branches around hilar bile duct, the open of venous plexus around fossa of gallbladder, lateral veins around gastric fundus and lesser curvature, lateral veins of lower part of esophagus and expansion of splenic vein were found in 31 (100%), 19 (61.29%), 21 (67.74%), 7 (22.58%) and 15 patients (48.38%), respectively. Conclusion Tumor emboli-induced CTPV from HCC has specific MSCT findings being helpful to the diagnosis.