This paper presents a motion rehabilitation-training instrumentfor stroke patients.Taking linear motion mode and circinal motion mode as training trajectory. we are aimed to help patients to accomplish nerve rehabilitation according to preset motion trajectory. Rehabilitation-training instrument takes pneumatic artificial muscle as a motion driver.Pneumatic artificial muscle has the following characteristics,such as,light weight,strong power,good flexibility,safety in use, easiness and cleanliness in source, etc. and it is suitable for rehabilitation medical treatment.The compression of gas,the nonlinearity of pneumatic artificial muscle and the existence of inherent hysteresis in the joint make the driving joint position in pneumatic artificial muscle be poor controlled and the response time be delayed,and thereby,the trajectory planning problem will be influenced directly.Therefore,we adopts proportional-integral-derivative (PID) controller by neural network to control the position of pneumatic artificial muscle.

Objective To investigate the effects of somatostatin(SST)or vasoaetive intestinal peptide (VIP)on the expression of MAdCAM-1 in the intestinal muecosa of rats with multiple organ dysfunction syndrome (MODS)and its significance of prevention and treatment of MODS.Method Thirty six Wistar male rats were randomly divided into 6 groups(6 rats in each group),including control group,VIP group 1 and SST group1 (rats treated with VIP and SST respectively),MODS group(rats with MODS),VIP group 2 and SST group 2(NODS rats treated with VIP and SST respectively).The rat model of MODS(system inflammatory response syndrome,＞2 or-gans dysfunction)was established by occlusion of superior mesenteric arteries.0.2 ρmol·g-1 h -11 VIP or SST by intravenous injection combined with 0.25 ρmol/g VIP or SST by intraperitoneal injection were injected into rats.In each group,intestinal lymphocytes from rats labeled with 51 Cr were infused into rat veins and were quantified with γcounter in GALT.The expression of MAdCAM-1 in the intestinal mucosa was measured by western blot.Inflam-mation in the intestinal mucosa was evaluated with histological sections.Student's t test was used to assess differ-ence between the experiment group and the control group.Results In VIP group l and SST group 1,the peak values of MAdCAM-1 expression in diffusive lymphatic tissue of small intestinal were 157.67±2.52 and 154.33±3.22.and those in Peyer patches were 136.00±1.00 and 137.00±1.00.There were no significant difference when compared with control group(165.33±1.53,152.67±2.31,P＞0.05).The percentage of 51 Cr-lympho-cytes in diffusive lymphatic tissue of small intestine(1.04%±0.59%,1.01%±0.83%)showed no significant difference from control group(1.07%±0.61%,P＞0.05),and those in Peyer patches(1.83%±0.90%,1.56%±0.64%)were significantly less than control group(3.85%±2.02%,P＜0.05).In VIP group 2 and SST group 2,the peak values of MAdCAM-1 expression in diffusive lymphatic tissue of small intestinal(158.00±2.65,154.33±1.53)and Peyer patches(156.33±1.53.151.33±2.31)were significantly less than MODS group(175.33±2.52,173.00±2.65,P＜0.05).The percentage of 51 Cr-lymphocytes in diffusive lymphafic tissue of small intestine(1.58%±0.42%,1.45%±0.26%)and Peyer patches(2.14%±1.49%,0.81%±0.35%)were significantly less than MODS group(3.23%±1.69%,5.04%±1.23%,P＜0.05)and the se-vere histopathological danlage in intestine was relieved.Conclusions VIP or SST reduced intestinal lymphoeytes homing to GALT in rats with MODS through suppressing the expression of MAdCAM-1,and attenuated the inflam-matory injure in the intestinal mucosa.

[Objective]To observe the growth of the spine of chickens after injection of the antagonist of the MEL1-a receptor of melatonin to restrain the effect of melatonin. [Methods]Forty-five newborn Little-Shaoxing chickens were divided in three groups:(1) Fifteen chickens(control group) were kept in light-dark(12h: 12h) cycle,500 1x in daytime and 0-5 1x in nighttime.(2) Fifteen chickens(operative group) received pinealectomy when they were 3 days old.They were kept in the same light condition as the control group.(3) Fifteen chickens(antagonist group),a antagonist of the MEL1-a receptor of melatonin(Luzindole,30mg/kg) was injected abdominally every day when they were 3 days old.They were kept in the same light condition as the control group.Radiologic examinations were performed for all chickens.[Results]No chickens developed scoliosis in control group and antagonist group.Seven chickens developed scoliosis in the operative group when the chickens were 3 months old.[Conclusion]Pinealectomy can reduce the secretion of melatonin and induce scoliosis in some of the chickens.But injection of Luzindole to restrain the effect of malatonin cannot induce experimental scoliosis in chickens.

0.05). However, the 5-year local control rate appeared significantly different in three groups (?~2=7.239, P0.05). The 1-,3-,and 5-year disease-free survival rate among three groups were significantly different in the three groups (79.1%, 41.9% and 35.6% for CFR group, 85.7%, 57.1% and 38.1% for FHR group, and 95.4%, 62.8% and 58.1% for LAHR group) (?~2=6.60,P0.05). The incidence of loss of hearing, the radiation-induced temporomandibular joint lesion, and the radiation-induced brain injury was 31.3%, 41.9% and 9.3% in CFR group, and 25.0%, 35.7% and 7.1% in FRH group, and 22.7%, 35.7% and 7.0% in LAHR group, respectively. Conclusion A better 5-year local control rate and disease-free survival rate were achieved in patients in LAHR and FHR groups than those in CFR group. There are no differences in the incidence of late complications and overall survival rate among three groups.

Objective To investigate the effect of percutaneous transforaminal endoscopic surgery for lumbar prolapse upwards type disc herniation.Methods According to the digital table,90 patients with lumbar prolapse upwards type disc herniation were randomly divide into the observation group and the control group,45 cases in each group.The observation group was treated with percutaneous transforaminal endoscopic surgery,the control group was treated with conventional open surgery.The curative effect,operation and adverse reactions were compared between the two groups.Results All patients were satisfied with the location,and they were completely removed from the nucleus.Compared with the control group,the operation time[(75.3±23.1)min vs.(103.4±35.4)min]and hospitalization time[(6.8±1.2)d vs.(8.7±1.8)d]of the observation group were shorter,the bleeding volume[(24.5±8.5)mL vs.(51.6±12.7)mL]was lower,the differences were statistically significant(t=4.453,5.632,4.269,all P<0.05).After one month and three months,the VAS score[(2.53±0.65)pints and(1.33±0.48)points]and ODI[(21.40±5.04)% and(12.93±3.50)%]of the observation group were significantly lower,there were statistically differences between the two groups compared with those before treatment(t=6.755,8.765,all P<0.05).And after one month,the VAS score and ODI of the observation group were significantly lower than those of the control group,the differences were statistically significant(t=4.342,3.985,all P<0.05).There was no significant difference between the two groups in the excellent and good rate(86.7% vs.82.2%,X2=1.011,P>0.05).ConclusionPercutaneous endoscopic discectomy surgery in the treatment of lumbar prolapse upwards type disc herniation is reliable,and it has less trauma and shorter hospital stay.

[Objective]To explore the biomechanical stability of fixation with two and three cannulated compression screws in treatment of the adductive femoral neck fractures by the three-dimensional finite element analysis(FEA).[Method]Two FEA models of two screws and three screws for adductive femoral neck facture fixations were set up to investigate the simulated loading of three different conditions.[Result]At the condition of the heel touching the ground and the middle position,there was no difference in the biomechanical stabilities of the two models.However,at the condition of the tiptoe departing from the groud,the model of three screws fixation was better in torsion resistance and stretching resistance.[Conclusion]The biomechanical stability of fixation with two screws is determined by the direction of loading.Three cannulated compression screws fixation provides better biomechanical stability.

Objective To evaluate the efficacy of narrow-band imaging (NBI) in diagnosis of color-ectal neoplasm. Methods A total of 96 colorectal neoplasm from 78 patients were observed under NBI, and the findings were compared with those from magnifying chromo-endoscopy and pathologic examinations. Re-suits The sensitivity of conventional colonoscopy in diagnosis of polyps was 78. 7%, which was increased to 99% (P < 0. 05) under NBI, with the clear identification of the shape and boundary of the lesions. Magnif-ying NBI colonoscopy provided images of pit patterns similar to those from chromo-endoscopy in diagnosis of type Ⅱ , ⅢL, Ⅳ and ⅤN, which showed better recognition than conventional colonoscopy, but less sensitiv-ity than chromo-endoscopy. Superficial vascular morphologic features could be better classified with NBI, with sensitivity of 100% and specificity at 87. 8%, which was superior to conventional colonoscopy but infe-rior to chromo-endoscopy. Conclusion Both chromo-endoscopy and NBI colonoscopy have better sensitivity and specificity in detection of colon polyps, while chromo-endoscopy reveals clear superficial structure of le-sion and pit pattern, and NBI demenstrates capillary morphology, which can distinguish neoplasm from non-neoplasm colorectal lesions. NBI, easy and convenient to switch, is an effective technique to make early di-agnosis of colorectal neoplasm.

BACKGROUND: As a common anticoagulant, heparin is widely used in clinic, but it has remarkable side effects such as severe bleeding and heparin-induced thrombocytopenia, and it cannot inactivate fibrin-bound thrombin. Annexin Ⅴ derivative (AND) is inosculated with C-terminal of hirudin and annexin Ⅴ, and its anticoagulation and anti-thrombosis effects are compared with those of heparin. OBJECTIVE: To investigate the relationship between quantitative effectiveness and time effectiveness of AND on coagulation and thrombosis, and study its reliability. DESIGN: Completely randomized grouping design and controlled study. SETTING: Cardiac Department of amunicipal hospital. MATERIALS: The experiment was conducted at the Animal Laboratory of Jiangsu Provincial People's Hospital from July 2000 to April 2001. Totally 32 male New Zealand white rabbits were randomly divided into 4groups, namely, high dosage AND group, low dosage AND group, common heparin group and saline group with 8 in each group. METHODS: Heparin and AND were diluted with saline.①High dosage AND group: 0.7 mg/kg AND was injected intravenously and followed by intravenous dripping of 0.35mg/(kg ·h)for 2 hours.Low dosage AND group: 0.3 mg/kg AND was injected intravenously and followed by intravenous dripping of 0.15 mg/(kg·h) for 2 hours. Heparin group: 75 IU/kg heparin was injected intravenously and followed by intravenous dripping of 37.5 IU/(kg·h) for 2 hours. Saline group: The same volume of saline and medication were used as those in drug groups.② Blood sample was collected from the femoral vein before administration so as to test blood routine, activated partial thromboplastin time(APTT)and prothrombin time (PT) after 15-, 30- and 60-minute administration and 2-hour withdrawal.③Saccule was separated from endothelium of femoral artery to measure blood pressure of distal femoral artery at 15 minutes after administration.Time of pulse pressure equal to 0 mmHg was recorded when the vessel was occluded completely by a thrombus.Finally the injured femoral arteries whose vessel was stripped were collected to measure its length, wet weight and dry weight. ④Observation of AND toxicity and sideeffects:During the experiment,vital signs of the animals were measured,such as blood pressure,heart rate and breath;in addition,bowelhemorrhage was observed and the number of leucocytes was counted after dissection of some of the animals. MAIN OUTCOME MEASURES:①Effect of AND on blood coagulation system and arterial thrombosis.②AND toxicity and side effects. RESULTS: All the 32 white rabbits entered the final analysis. ① Anticoagulant effect: APTT: Fifteen minutes after administration, APTT in AND group was the longest,which was(136.86±39.46)s in high dosage AND group and (122.90±34.19) s in low dosage ANDgroup.Moreover, APTT was longer than that in saline group [(95.14±24.64) s], but shorter than that in common heparin group [(180.00±0.00) s, P ＜ 0.05, 0.01]. At 30 minutes after administration,AND in high dosage group still had coagulation,and APTT was (124.61±40.19) s in high dosage group, which was longer than that in saline group [(85.57±27.67) s], but APTT was (112.94±43.17) sin low dosage group,which was shorter than that in common heparin group [(85.57±27.67)s,P ＜ 0.05].APTT was shorter in high and low dosage groups than in common heparin group at 60 minutes after administration (P ＜ 0.05),and longer than that in saline group 2 hours after drug withdrawal,but there was not significant difference(P ＞ 0.05).PT:PT in common heparin group was longer than that in high and low dosage groups at 15,30 and 60 minutes after administration (P ＜ 0.05).② Effect on arterial thrombosis:Wet weight of thrombus:It was lighter in AND group than in common heparin group(P ＜ 0.05). Dry weight of thrombus:Thrombus was lighter in high and low dosage groups than in common heparin group, and was lighter in high dosage group than in low dosage group (P ＜ 0.05).Thrombus length:It was shorter in low dosage group than in saline group (P ＜ 0.05), and shorter in high dosage groupthan in common heparin group (P ＜ 0.05). Time of complete occlusion: It was longer in high and low dosage groups than in saline group(P ＜ 0.05).③ AND toxicity and side effects:The behavior of rabbits in high and low dosage groups was similar to that in other two groups. Obvious hemodynamic changes were not found, and bowel hemorrhage was not observed, either. CONCLUSION: AND is an effective anticoagulant and anti-thrombosis agent; the highest anticoagulation effect occurs at 15 minutes afteradminis tration. However, the anticoagulant effect is poor as compared to heparin.The effect is poorer after 60-minute administration. Effect of AND on thrombus is stronger than that of heparin,but the size of thrombus is smaller than that of heparin, and the dosage-dependence manner was found. In addition, the anti-thrombus effect of AND is stronger in high dosage group than in low dosage group.

Objective To determine the median effective target plasma concentration (EC50) of remifentanil inhibiting responses to skull-pin placement when combined with propofol in the female patients undergoing neurosurgery.Methods Sixteen female patients,aged 20-60 yr,with body mass index of 18-30 kg/m2,of American Society of Anesthesiologists physical status Ⅰ or Ⅱ,scheduled for elective neurosurgery under general anesthesia,were enrolled in this study.Anesthesia was induced with propofol and remifentanil given by target-controlled infusion and iv rocuronium 0.6 mg/kg.The target plasma concentration (Cp) of remifentanil and propofol was set at 5 ng/ml and 3 μg/ml,respectively.At 3 min after tracheal intubation,the target Cp of remifentanil was adjusted and set at 5 ng/ml in the first patient.The skull-pin was placed after the target effect-site and plasma concentrations were balanced.The Cp increased/decreased by 20％ each time in the next patient depending on whether or not the response to skull-pin placement was positive.The ratio between the two successive concentrations was 1.2.The response to skull-pin placement was defined as positive when heart rate and/or mean arterial pressure increased by 20％ of the baseline value within 1 min after placement.The EC50 and 95％ confidence interval of remifentanil required to inhibit responses to skull-pin placement were calculated when combined with propofol.Results The EC50 (95％ confidence interval) of remifentanil required to inhibit responses to skull-pin placement was 3.74 (3.43-4.09) ng/ml when combined with propofol.Conclusion When combined with propofol,the EC50 of remifentanil inhibiting responses to skull-pin placement is 3.74 ng/ml in the female patients undergoing neurosurgery.

BACKGROUND:Spinal canal decompression reduction fixation combined with bone graft fusion has been extensively applied in the clinic. Bilateral pedicle screw assisted interbody fusion and unilateral pedicle screw assisted interbody fusion are main methods to treat degenerative lumbar spinal stenosis and lumbar spondylolisthesis. OBJECTIVE:To compare early clinical therapeutic effects of bilateral and unilateral pedicle screw assisted interbody fusion in elderly patients with spinal stenosis and degenerative spondylolisthesis. METHODS:A total of 60 elderly patients with spinal stenosis with degenerative lumbar spondylolisthesis were selected, including 37 males and 23 females, at the age of 60 to 78 years old. They were divided into two groups, and subjected to decompression of spinal canal. In the treatment group (n=30), patients received unilateral pedicle screw assisted interbody fusion. In the control group (n=30), patients received bilateral pedicle screw assisted interbody fusion. After treatment, they were folowed up for 1 year. The recovery of joint function was assessed using Japanese Orthopaedic Association scores in both groups. Simultaneously, complications were recorded. RESULTS AND CONCLUSION:Japanese Orthopaedic Association scores were 25.7±1.9 and 25.8±1.8 in the treatment and control groups, respectively, and no significant difference was found between groups. In the treatment group, three cases affected lower limb numbness and two cases suffered from dural tear, with the incidence of complication of 17%. In the control group, three cases affected lower limb numbness and three cases suffered from dural tear, with the incidence of complication of 20%; no significant difference was detected between the two groups. No adverse reaction related to bone graft was found in the two groups. These results confirm that bilateral or unilateral pedicle screw assisted interbody fusion in treatment of degenerative lumbar spondylolisthesis with spinal stenosis obtained good therapeutic effects.