Objective To establish a carotid artery stenosis model by endovascular technique suitable for neuro-interventional therapy.Methods Twelve dogs were anesthetized, the unilateral segments of the carotid arteries' tunica media and intima were damaged by a corneous guiding wire of home made. Twenty-four carotid artery stenosis models were thus created. DSA examination were performed on postprocedural weeks 2, 4, 8, 10 to estimate the changes of those stenotic carotid arteries. Results Twenty-four carotid artery stenosis models were successfully created in twelve dogs. Conclusions Canine carotid artery stenosis models can be created with the endovascular method having variation of pathologic characters and hemodynamic changes similar to human being. It is useful for further research involving the new technique and new material for interventional treatment.

Objective To explore the relations between the post pancreatoduodenectomy pancreatic anastomotic hemorrhage and the length of pancreatic duct endoprosthesis placed in the jejunum.Methods From August 2006 to August 2011,63 patients underwent pancreaticoduodenectomy with the adopted child method for digestive tract reconstruction,while pancreaticojejunostomy reconstruction was divided into A,B,C groups.There were 22 cases in A group,and patients underwent pancreaticojejunostomy with anastomosis of the pancreatic stump into the jejunum strapping method,the length of pancreatic duct endoprosthesis placed in the jejunum was 15 cm; there were 21 cases in B group,and patients received the same operation as patients in group A,but the length of pancreatic duct endoprosthesis placed in the jejunum was 5 cm; there were 20 cases in C group,and patients received pancreatic stump and jejunal mucosa anastomosis,the length of pancreatic duct endoprosthesis placed in the jejunum was 5 cm.Results In group A,two cases (9.1％) of pancreatic anastomotic hemorrhage occurred,and patients were cured by conservative treatment.In group B,eight cases (38.1％) of pancreatic anastomotic hemorrhage occurred,and two cases died of gastrointestinal bleeding; 3 cases received surgical operation to stop bleeding,and 3 patients were cured by conservative treatment.There was no anastomotic hemorrhage occurred in group C.The bleeding times of group A and group B were about 15 days after surgery,the difference of incidence of anastomotic bleeding between the two groups was statistically significant (x2 =9.428,P =0.009).Conclusions Post pancreaticojejunostomy anastomotic hemorrhage is associated with short length of pancreatic duct endoprosthesis placed in the jejunum.

Objective To investigate the clinical effects of pedicled omentum covering the intestinal anastomotic stoma in preventing anastomotic fistula.Methods The clinical data of 133 patients with high risk of intestinal anastomotic stoma who were admitted to the Henan Tumor Hospital from May 2009 to May 2012 were retrospectively analyzed.All patients were divided into the improvement group (69 patients) and the control group (64 patients) according to whether the anastomotic stoma was covered by pedicled omentum.All the operations were done by the surgeons in the same group,and the intestinal reconstruction was done by the equipment produced by the same company.All the patients with intestinal tumors received radical resection.The clinical data of the patients in the 2 groups were reviewed and the therapeutic effects of the 2 approaches were compared.All data were analyzed using the chi-square test.Results Three (4.3％) patients had intestinal fistula in the improvement group,including 1 had small bowel anastomotic fistula,1 had small bowel and colonic anastomotic fistula,1 had colonic anastomotic fistula.Eight (12.5％) patients in the control group had intestinal anastomotic fistula,including 1 had duodenal anastomotic fistula,2 had small bowel anastomotic fistula,2 had small bowel and colonic anastomotic fistula,and 3 had colonic anastomotic fistula.There was a significant difference in the incidence of anastomotic fistula between the 2 groups (x2 =5.483,P ＜ 0.05).The highest body temperatures of the 3 patients in the improvement group were under 38.2 ℃,and the mean white blood cell count was 8.4 × 109/L;no peritonitis was detected; turbid drainage was observed in the peritoneal tube around the anastomotic stoma.The results of computed tomography showed local inflammation.The highest body temperatures of the 8 patients in the control group were above 38.5 ℃,and the mean white blood cell count was 14.4 × 109/L; obvious pressing pain and rebound tenderness were detected; intestinal contents were observed in the peritoneal drainage tube.The 3 patients in the improvement group were cured by symptomatic treatment.Of the 8 patients in the control group,7 received two-stage debridement,and 1 received jejunostomy and 3 received ileostomy.The condition of the 7 patients was recovered after operation,and reversion of the ileum at postoperative month 4.One patient died of multiple organs dysfunction syndrome and systemic inflammatory response syndrome.Conclusion Intestinal anastomotic stoma covered by pedicled omentum could effectively decrease the incidence of anastomotic fistula and alleviate systemic inflammatory response syndrome caused by anastomotic fistula.

Objective To evaluate the interventional management in emergency splanchnic bleeding and the application value.Methods 27 patients with emergency splanchnic bleeding underwent the interventional management in our hospital from May of 2003 to January of 2006 were reviewed.The sites and causes of the splanchnic hemorrhage were verified through selective DSA,using different methods and materials for percutaneous transarterial embolization.Results No bleedings recurred in all 27 patients within 18 months after the treatment.3 patients of advanced hepatic carcinoma died in 6 months because of non-splanchnic bleeding etiology.Conclusions Selective angiography is a veracious way to detect the location and cause of emergency splanchnic hemorrhage.The choice of different selective arterial embolizations and embolic materials can effectively and promptly cease the bleeding with rescuing the patients.

Objective To discuss the safety and clinical effect of fine needle single-step centesis in percutaneous endoscopic nephrolithotomy for renal staghorn calculi. Methods Percutaneous endoscopic nephrolithotomy with fine needle single-step centesis was employed in 75 patients (single-step group) with renal staghorn calculi, and percutaneous endoscopic nephrolithotomy with two-step centesis was adopted in other 75 patients with renal staghorn calculi (two-step group). The clinical effect and the incidence of complications were compared between the two groups. Results The placement of drainage catheter was successfully accomplished in all 150 patients. In single-step group the operation time was 18-45 minutes with a mean of 36 minutes; the mean blood loss during the procedure was about 5 ml. After the treatment, massive bleeding occurred in 3 cases that needed blood transfusion, and residual stone was observed in 6 cases. In two-step group the operation time was 16-42 minutes with a mean of 34 minutes; the mean blood loss during the procedure was about 7 ml. After the treatment, massive bleeding occurred in 7 cases that needed blood transfusion; one of them had renal pseudoaneurysm and the bleeding was stopped after renal artery embolization treatment; and residual stone was observed in 7 cases. No procedure-related perirenal organ injury was seen in single-step group, while in two-step group pneumothorax (n=1) and injury of splenic flexure of colon (n=1)were found. Conclusion In performing percutaneous endoscopic nephrolithotomy, fine needle single-step centesis is more safe and effective than conventional two-step centesis.

Objective To explore the technique and clinical effect of Fogarty catheter in treatment of acute limb arterial embol-ism.Methods Eight cases of acute limb arterial embolism treated by Fogarty catheter were analyzed retrospectively.The technique of thrombectomy,curative effect,complications,prognosis,and 6-24 months follow-up results were assessed to evaluate the safe-ty,effectiveness and operative skills.Results Seven cases were cured,and 1 case was efficacious.The endangium injury and vaso-spasm was occurred in 1 case,respectively.During follow-up from 6 to 24 months,6 cases recovered activity,1 case was hemiplegia because of cerebral infarction after 12 months,and 1 case died of respiratory function failure after 6 months.Conclusion Fogarty catheter is safe and effective in treatment of acute limb arterial embolism.

Objective To study the trans-bladder operative approach in resection of the complicated pelvic tumors with bladder invasion.Methods Twelve patients with complicated pelvic tumors were analyzed from Oct.2007 to Oct.2010.There were 8 males and 4 females.Patient's age was ranging from 35 to 65 years.There were 3 patients with tumor diameter from 10 to 16 cm and 9 patients with tumor diameter greater than 16 cm.All the tumors were located in the pelvic and the stage of all tumors was T4N0M0.The technology of trans-bladder to approach the lower edge of the pelvic tumor and then retrograde up to remove the tumor out of the presacral tissue,pelvic wall,and pelvic organ was applied.The length of hospital stay,operative time,blood loss,death during peri-operative period and the post-operative survival were analyzed retrospectively.Results The median operative time was 126 (110-150) min.The median blood loss was 521 (300-1200) ml.The median hospital stay was 22 (14-28) d.No patient died after surgery.Ten patients were followed up for 6 to 48 months.Three cases died of metastasis or recurrence.Conclusion With the trans-bladder operative approach,the resection of pelvic retroperitoneal tumors is effective and safe.

Objective To investigate the effects of pancreaticoenterostomy by separating and continuous suture on pancreatoduodenectomy.Methods The clinical data of 76 patients who underwent curative pancreaticoduodenectomy from March 2002 to October 2014 in Tumor Hospital of Zhengzhou University were retrospectively analyzed.Of all the patients,43 received pancreaticoenterostomy by separating and continuous suture (study group),and the other 33 patients received BPJ anastomosis (control group).All the patients used Child reconstruction,the diagnosis of pancreatic fistula was made according to ISGPF criteria.The operation time of pancreaticoenterostomy,the incidence of hemorrhage of anastomosis and the incidence of pancreatic fistula were retrospectively analyzed.Results The age,sex,hemoglobin,albumin,total bilirubin,the incidence of co-morbidity of diabetes,extent of surgical resection between 2 groups were comparable without significant difference.In study group,the time of pancreaticoenterostomy was 11 min(8 ～ 15 min),there were 4 patients with class Ⅰ pancreatic fistula,and 1 patient with class Ⅱ pancreatic fistula.No patient developed class Ⅲ pancreatic fistula or anastomotic bleeding.In control group,the time of pancreaticoenterostomy was 16 min(12 ～25 min) which was only available for 5 patients,and no records for other patients.There were 6 patients with pancreatic fistula including 4 patients with class Ⅱ,2 patients with class Ⅲ,while no records for class Ⅰ.Four patients were found to have anastomotic bleeding.Conclusions With the pancreaticoenterostomy by separating and continuous suture method,the surgical field is fully exposed,the suture time is shortened and the incidence of anastomotic bleeding and pancreatic fistula is reduced.

Objective To investigate the efficacy of wrapping and suturing of pancreatic stump with the avascular zone of the transverse mesocolon for preventing pancreatic leakage after distal pancreatectomy.Methods The clinical data of 69 patients who received distal pancreatectomy at the Affiliated Tumor Hospital of Zhengzhou University from May 2011 to March 2014 were retrospectively analyzed.The pancreatic stump was wrapped with the avascular zone of the transverse mesocolon after suturing the pancreatic stump in 34 patients (the modified group),and the pancreatic stump of 34 patients was sutured without any other treatment (the control group).The time for pancreatic stump management,complications,time for drainage tube placement and duration of postoperative hospital stay of the 2 groups were compared.Patients were followed-up through outpatient examination and telephone interview till June 2014.The measurement data and the count data were analyzed using the t test and the chi-square test,respectively.Results The time for pancreatic stump management of the modified group and the control group were (15.2 ± 2.1) minutes and (13.2 ± 3.2) minutes,with no significant difference between the 2 groups (t =1.565,P ＞ 0.05).No patient was complicated with other diseases in the modified group,while 9 patients in the control group was complicated with pancreatic fistula,with significant differences between the 2 groups (x2=9.399,P ＜0.05).The time for drainage tube placement of the modified group and the control group were (6.1 ± 2.2) days and (16.6 ± 3.5) days,the duration of postoperative hospital stay were (12.5 ± 2.5) days and (21.5 ± 3.5) days,with significant difference between the 2 groups (t =-11.902,-9.853,P ＜ 0.05).Sixty-three patients were followed up from 1 to 35 months with a mean time of 15 months.Fifteen patients died,and the condition of other patients was normal.Conclusion Wrapping and suturing of the pancreatic stump with the avascular zone of the transverse mesocolon is effective for preventing the pancreatic leakage after distal pancreatectomy and shortens the time of postoperative hospital stay.

Objective To investigate the clinical efficacy of three dividing lines in radical right hemicolectomy for right colon cancer.Methods The clinical data of 166 patients with right colon cancer (including ileocecal cancer,ascending colon carcinoma and hepatic flexure of the colon) who were admitted to the Affiliated Tumor Hospital of Zhengzhou University from March 2009 to August 2014 were retrospectively analyzed.Eightythree patients who underwent radical right hemicolectomy via three dividing lines were allocated to the modified group and 83 patients who underwent radical right hemicolectomy via medial approach were allocated to the control group.The operation time,volume of intraoperative blood loss,number of lymph node dissection and processing time and volume of the superior mesenteric vein (surgical trunk) hemorrhage were analyzed between the 2 groups.Patients were followed up by outpatient examination and telephone interview till November 2014.The measurement data with normal distribution were presented as x ± s.The comparison between groups was analyzed using t test.The count data were analyzed by the chi-square test.Results The operation time in the modified group and in the control group were (75 ± 7) minutes and (109 ± 13) minutes,respectively,with a significant difference (t =-36.700,P ＜0.05).The volume of intraoperative blood loss and number of lymph node dissection in the modified group were (118 ± 15)mL and 19 ±4,which were not significantly different from (116 ±22)mL and 18 ± 3 in the control group (t =0.104,12.300,P ＞ 0.05).During D3 lymph node dissection,the incidence of hemorrhage of the superior mesenteric vein,processing time of hemostasis and volume of blood loss were 3.6％ (3/83),(7 ± 3) minutes and (103 ± 25) mL in the modified group and 9.6％ (8/83),(20 ± 5) minutes and (209 ± 37)mL in the control group,respectively.There was no significant difference in the incidence of hemorrhage of the superior mesenteric vein between the 2 groups (x2 =2.434,P ＞ 0.05).There were significant differences in the processing time of hemostasis and volume of blood loss between the 2 groups (t =38.100,29.200,P＜0.05).The patients were followed up for 3 months to 5 years with a median time of 22 months.Of 166 patients,23 died,11 were loss to follow-up and others survived at the end of follow-up.Conclusion Three dividing lines is safe and feasible in radical right hemicolectomy for right colon cancer,with a good clinical efficacy.