Objective To investigate the clinical effect of chitosan in prevention of knee dysfunction due to adhesion after operation for patellar fracture. Methods From March to October 1999, 40 cases of patellar fracturewere treated by internal fixation, with intraarticular injection of 2% chitosan in only 24 cases after fixation and with no chitosan injection in 16 cases(control group). The function of the knee joint, including extension and flexion, was evaluated 1month and 1 year after operation respectively. Results One month after operation, the knees with chitosan injection could actively move in the average range of 104°±23°, and the knees in the control group could move in the average range of72°±16°, which showed significant difference between two groups(P＜0.01); 1 year after operation, the range of movement of the knees with injection was 165°±38° on average, and that of the knees in the control group was 110°± 31°, which also indicated significant difference between two groups (P＜0.05). Conclusion Medical chitosan could effectively prevent or reduce the post-operative adhesion of knee joint after patellar operation.
目的 探讨腹腔镜下治疗粘连性肠梗阻的可行性和效果。 方法 分析在腹腔镜下对粘连性肠梗阻行粘连松解术的33例病例。结果 33例均顺利完成腹腔镜下粘连松解术，术后恢复好，无手术并发症发生； 随防6～15个月，均无腹痛、腹胀等症状复发。结论 利用腹腔镜对粘连性肠梗阻有选择地进行粘连松解手术安全、可行，能提高粘连性肠梗阻的治疗效果。
Lung segmentation is the premise of the computer aided diagnosis of lung cancer. The traditional segmentation method based on local low-level features can not get the correct result when a tumor is connected with pleura due to their similar computed tomography (CT) values. Moreover, because the big size of tumor leads to the loss of a large part of lung area, the traditional segmentation methods of lung with juxta-pleural nodule whose diameter is less than 3 cm are not suitable. Acitve shape model (ASM) combined with prior shape and low level features might be appropriate. But the search steps in conventional ASM is an optimization method based on the least square, which is sensitive to outlier marker points, and it makes profile update to the transition area of normal lung tissue and tumor rather than a true lung contour. To solve the problem, we proposed an improved ASM algorithm. Firstly, we identified these outlier marker points by distance, and then gave the different searching functions to the abnormal and normal marker points. And the search processing should be limited in volume of interesting (VOI). We selected 30 lung images with juxta-pleural tumors, and got the overlap rate with the gold standard as 93.6%. The experimental results showed that the improved ASM could get good segmentation results for the lungs with juxta-pleural tumors, and the running time of the algorithm could be tolerated in clinical.
目的提高广泛粘连性肠梗阻的治疗效果，预防粘连性肠梗阻复发。方法分析我院1994年1月至2000年5月6年间手术治疗28例广泛粘连性肠梗阻的临床资料。结果手术后无肠梗阻复发，术后8例发生切口感染，无手术死亡及肠瘘发生。结论把握好手术时机是提高粘连性肠梗阻治疗效果的关键，肠排列术是预防粘连性肠梗阻的一个有效方法。
The poly-lactic acid membrane is characterized by its non-toxicity, non-carcinogenic and the property of degradation in the body in animal experiment, this membrane was wrapped around the tenorrhaphy site. The results showed that 3 to 9 weeks after operation there was an intact space surrounding the tendon, and the membrane began to degradate at 24 weeks, might achieve the purpose to prevent the formation of adhesion. From Nov. 1985 to Sept. 1989, this membrane was applied to 20 tendons of 14 patients. The follow-up results showed that the satisfactory rate was 81.8% .the indications of using poly-lacic acid membrane were primary, delayed primary and secondary suture of flexor tendon injuries in areas of the fingers.
Objective To investigate the effects of human acellularamnion membrane on SD rat tendon adhesion and to obtain the experimental data for clinical application in preventing postoperative tendon adhesion. Methods The tendons of 28 adult SD rats hindlimb were cut and sutured. The tendons of left hindlimb were encapsulated by human accellular amnion membraneas the experimental group and the ones of the other side were not encapsulatedas control group. The rats were killed 1, 2, 4, 6, 8 and 12 weeks after operation. The results were evaluated grossly and histologically. Results There were no differences in healing of injury tendon and inflammatory response between the two groups. The anatomical and histological results showed the experimental group had less adhesion than the control group(Plt;0.05). Conclusion Human acellular amnion membrane can prevent adhesion of tendonwithout affecting tendon healing and is an optimal biological material to prevent tendon adhesion.
目的探讨粘连性肠梗阻的病因、诊断及治疗。方法对1996～2001年我科收治的149例粘连性肠梗阻患者的临床资料进行回顾性总结、分析。结果本组149例均发生于腹腔手术后，主要症状是腹痛、腹胀、呕吐、肛门停止排气、排便，体征为腹胀、肠型、肠鸣亢进、腹部压痛。行腹部X线平片检查140例，泛影葡胺胃肠道造影18例,149例均确诊，其中不完全性肠梗阻112例，完全性肠梗阻37例。行非手术治疗123例,手术治疗26例，全组均治愈或好转。结论腹腔手术是形成粘连性肠梗阻的主要因素，诊断主要依靠病史、体征及腹部X线摄片检查，泛影葡胺胃肠道造影对明确梗阻部位有较大帮助，也有一定治疗作用。粘连性不全性肠梗阻非手术治疗成功率高，而完全性肠梗阻或出现肠绞窄时应积极手术，掌握手术时机十分重要。
Objective To array the small intestine so that the uncontrollable adhesions will turn to controllable abhesions in order to prevent the intestinal obstruction. Methods Literatures were reviewed. The advance of plication of small intestine has passed through three stages: 1st, sewing the intestine just like the array of harpsichord keys; then, using straight needle with coarse threads to make a ‘U’ suture for the mesentery of small intestine so the intestine was arrayed, and 3rd inserting a Millers-Abbott tube into the lumen of small intestine followed by manual arrangement of the intestine. Results Using the Millers-Abbott tube the intestine was fixed in a steady position and arrayed in a half moon circular shape to avoid sharp angle. As a result, the intra-luminal pressure of the intestinal was effectively decreased. Follow up 45 cases showed the cure rate of 91.9%. Conclusion This operation has widely been accepted by the surgeons for its simplicity, high efficacy and reliability. It reduces the recurrence rate of adhesive obstruction.
Objective To assess an effect of 5-fluorouracil (5-FU) applied topically on the tendon adhesion and the healing process after the flexor tendon repair in Leghorn chickens. Methods Thirtytwo white Leghorn chickens, aged 4 months and weighing 1.5-1.7 kg, were randomly divided into 2 groups: Group A andGroup B, with 16 chickens in each group. The flexor digitorum profundus tendons of the 2nd, 3rd and 4th toes were transected and repaired. The repair site in Group A was given 5-FU in a concentration of 25 mg/ml with a soaked sponge that wascut into pieces 7 mm×20 mm×1 mm in size, and the synovial sheath of the repair site was wrapped with the 5-FU-soaked sponge for 1 min for 4 times. The repair site in Group B was served as a control, with no 5-FU but with the sterile normal saline. At 3 and 6 weeks postoperatively, the repaired tendons and the tendon adhesion formation were examined macroscopically and histologically，and the repaired tendons were tested biomechanically. The tissue blocks from the tendon repair site were examined under the transmission electron microscope. Results At 3 and 6 weeks postoperatively, the macroscopic and histological observation showed that the peritendinous adhesions in Group A were looser when compared with those in Group B. The length of the tendon gliding and the extent of yieldance to exercise were found to be 4.85±1.31 mm, 0.67±0.42 mm and 5.74±1.61 mm, 1.55±0.35 mm respectively at 3 and 6 weeks after operation in Group A，but 2.99±0.51mm，0.24±0.14 mm and 3.65±0.54 mm, 1.22±0.16 mm in Group B.Group A was significantly greater in the abovementioned parameters than Group B (P＜0.05).At 3 weeks after operation, the ultimate breaking strength was 20.28±4.92 N in Group A and 21.29±4.88 N in Group B, with no statistically significant difference found between the two groups (P＞0.05). At 6 weeks, the ultimate breaking strength was 47.12±6.76 N in Group A but 39.31±7.20 N in Group B, with a significant difference between the two groups (P＜0.05). Conclusion 5-fuorouracil, when appliedtopically, can reduce the tendon adhesion, with no inhibition of the intrinsic healing mechanism. It is an ideal treatment strategy to prevent peritendinous adhesion.