Objective: To investigate the mechanism and correlative factors of SAM syndrome after aortic valve replacement. Methods: 48 patients with severe aortic valve stenosis were studied, echo-Doppler study was performed one week after aortic valve replacement, and the patients were divided into two groups with or without SAM Syndrome. The left ventricular end-diastolic dimensions, the left ventricular end-Systolic dimensions, the left ventricular outflow tract the thickness of septum and posterior wall, the maximal left ventricular velocities and left intra-ventricular dynamic gradients were recorded and compared. Results: There was no operative mortality. The maximal left ventricular velocities were increased significantly in 9 patients (more than 2。5 m/s) and six of them had SAM syndrome. There were statistic significance (P

Objective To evaluate the value of thoracotomy through small right subaxillary oblique incision for pediatric ventricular septal defect(VSD). Methods From November 2001 to December 2008,1539 children with VSD underwent thoracotomy through small right subaxillary oblique incision in our hospital.At the fourth intercostal space between the anterior and middle axillary lines,a straight or oblique incision was made,then along the inferior edge of the fourth rib the chest was opened,and the right edge of the pericardium was fixed at the thoracic retractor.Afterwards,off-pump circulation was established and minimally invasive cardiac surgery was carried out.Results The procedure was completed successfully in all the 1539 patients.The cross-clamp time was(22.8?11.4) min(11 to 48 min),and CPB time was(33.0?14.9) min(27 to 64 min).Two patients(0.13%,2/1539) died in 24 hours after the operation.One of them died of severe allergic reaction to protamine.And the other died of severe low cardiac output in 4 hours after the surgery,because of an injury to the left coronary artery.In this series,the postoperative complications included incisional infection in 3 cases,atelectasis in 9,perfusion lung in 5,low cardiac output in 5,infectious endocarditis in 3 and acute renal failure in 4.These 29 cases were discharged after the complications being cured.Follow-up was available in 1446 cases for(47.0?11.2) months(range,6~91 months).During the period,small residual shunts in the VSD were detected in 5 cases,and other cases showed no abnormalities.Conclusions Thoracotomy through small right subaxillary oblique incision is minimally invasive,safe and effective for pediatric VSD.

Objective To evaluate the value of retroperitoneal laparoscopic adrenalectomy for benign adrenal tumors.Methods From March 2003 to May 2008,78 patients with adrenal tumors received retroperitoneal laparoscopic adrenalectomy in our hospital. During the operation,three trocars were introduced into the lumbar region to establish retroperitoneal space by blunt dissection with the camera. Afterwards,the tumor was removed by using a harmonic scalpel. Results The procedures were successfully completed in all the 78 cases without blood transfusion,the operation time ranged from 45 to 180 min (mean,90 min). Drainage tubes were removed 24 hours after the operation. And the patients were discharged from hospital in 3 to 5 days postoperation. One patient showed regional subcutaneous emphysema after the surgery and was cured spontaneously. The patients were followed up for 3 to 24 months with a mean of 10 months,during which 36 patients achieved normal blood pressure in 3 months,while in the other 7 patients,oral antihypertension drugs were still needed. No patients had recurrent tumor during the follow-up. Conclusions Retroperitoneal laparoscopic can be the first choice for adrenal tumors,as it is safe and effective with minimal invasion,quick recovery,and short postoperative hospital stay.

Objective To compare the mid- and long-term results of tricuspid valve (TV) repair with or without an annuloplasty ring. Methods Two hundred seventy-seven patients underwent TV repair at our division (Sep. 2001 to Sep. 2008) ,of which 203 had, predominantly, a De Vega or Kay procedure (non-ring group) and 74had an annuloplasty with an artificial ring (ring group). TV pathology mainly was functional (secondary) and several with rheumatic leaflets involvement. Concomitant procedures consisted of mitral valve surgery in all patients,aortic valve surgery in 81 ,and coronary bypass in 19. Clinical and echocardiographic data followed for 1.5 to 3.5years were obtained. Results Postoperationally,the mid-term(1.5 years) follow-up was 100% completed and the long-term follow-up for 3. 5 years was 89. 9%. The recurrence of TV regurgitation (TR) of moderate and lower degree was not significantly different(χ2 = 1.3128, P= 0.26) in the 1.5 years follow-up between the two group,whereas the recurrence of TR of moderate to severity degree was significantly less in the ring group (χ2 =5. 8159,P =0.023).In the long term follow up,the TR in the ring group (25%) was significantly lower than that of 15% in the non-ring group (χ2 = 4. 9328, P = 0.036) . There are higher proportion of patients developing to moderate TR in the non ring group(34%) than in the ring group (10%) (χ2 =7. 9120,P =0.005). The TR developed fast in the ring group,increasing from 18% at 1.5 years follow up to 10% at 3.5 years follow up (χ2 = 2. 1327, P = 0.016),whereas it was relatively stable in the non-ring group,with 7% at 1.5 year follow up and 10% at 3.5 year follow up. Conclusions Placement of an annuloplasty ring in patients undergoing TV repair could remarkably improved the mid and long terum outcome. In clinic practice, we should be more positive to the functional TR and prefer to the procedure with annuloplasty ring.

Objective To compare the timeliness, success and mortality rates between the modified carotid artery puncture method ( MCAPM) and standard suture method ( SSM) in the establishment of rat model of a middle cerebral ar?tery occlusion ( MCAO) . Methods Thirty?two male rats were randomly and equally assigned into MCAPM group and SSM group. The MCAO models were established by inserting a thread into the common carotid artery ( CCA) . 24 h after modeling, the rats of the two groups were evaluated with Bederson neurological scores, and the modeling success rate and mortality rate were analyzed. Results The suture insertion times, success rates and mortality rates of the MCAPM vs. SSM groups were (82?3 ±17?4) s versus (164?6 ± 22?0) s (P<0?01), 87?5% versus 68?75% (P>0?05), and 6?25% versus 18?75% (P>0?05). Conclusions MCAPM can be used to establish the rat model of MCAO due to its simplicity, mild wound and feasibility.

0.05). Conclusions Silencing STAT3 gene can decrease STAT3 gene expressions , increase Bax gene expressions , induce cell apoptosis and suppress the tumor growth in the human breast carcinoma model by the RNAi technology .

Objective To evaluate the efficacy and safety of percutaneous micro-channel approach in treatment of pelvis side cyst and ureteropelvic junction obstruction simultaneously. Methods 32 patients with unilateral solitary parapelvic cyst complicated with UPJO, including 25 cases with ipsilateral kidney stones. After percutaneous holmium laser lithotripsy for patients complicated with calculi, then performed incision and drainage through the channels for parapelvic cyst by holmium laser, and antegrade high pressure balloon dilatation for UPJO, drainage by hippocampal tube in 3 ~ 6 months postoperatively. The operation time of fenestration drainage of cyst, narrow hypertensive dilatation and postoperative hospital stay were analyzed. Results Compared with 1 month (46.17 ± 6.33), 3 months (40.47 ± 6.06), 6 months (33.81 ± 7.05), 9 months (28.95 ± 7.92) after surgery, there was a marked improvement of the separation coefficient of renal convergence, the difference was statistically significant (P < 0.05). And compared with 6 months after surgery, the data of 9 months after surgery has statistical significant differences (P < 0.05). The separation coefficient of renal convergence decreases as time goes on. Conclusions Percutaneous micro-channel approach in treatment of pelvis side cyst and ureteropelvic junction obstruction by the same time can effectively relieve symptoms and decrease the separation coefficient of renal convergence. It is safe and effective.

ObjectiveTo explore the expression of MRP1 and CD34 in colorectal carcinoma tissue and the relationship with clinicopathological factors.MethodsImmunohistochemical streptavidin-perosidase method was used to examine the expression of MRP1 and CD34 in 53 cases with colorectal carcinoma and normal colorectal tissue.The correlation between the levels of MRP1and CD34 expression and clinicopathological factors were analyzed.ResultsThe positive expression rates of MRP1 in the carcinoma group and normal colorectal tissue group were 49.1％ and 15.1％ respectively,and there was a significant difference of the positive expression between the two groups( x2 =14.029,P ＜ 0.01 ).The expression of MRP1 had no correlation with the degree of differentiation,the depth of invasion,the metastasis of lymph node and all the other clinicopathological factors ( P ＞ 0.05 ).CD34 value in the carcinoma group and normal colorectal tissue group were ( 35.63 ± 12.23 ) MVD/HP and ( 6.12 ± 0.97) MVD/HP,respectively,and there was a significant difference between the two groups (t =17.565,P ＜ 0.01 ).CD34 was not correlated with age,sex,tumor size,localization of the primary tumor ( P ＞ 0.05 ),but correlated with Dukes staging,lymph node metastasis,differentiation of the tumor,depth of invasion( all P ＜ 0.05).ConclusionThe overexpression of MRP1 and CD34 protein may involve in colorectal carcinogenesis;MRP1 may involve in the primary multidrug resistance in colorectal carcinoma.; CD34 may involve in the colorectal carcinoma invasion and metastasis.Investigating the expression of MRP1 and CD34 in colorectal carcinoma simultaneously can provide new referential indexes for the treatment and prognosis of colorectal carcinoma.

A sensing method based on high-speed camera is proposed to recognize human arm motion in this paper. A sensing system for human arm motion was established. A fast image processing algorithm was developed to accurately extract marker positions in the image. Angle parameter results were further improved with the instantaneous joint center principle. The human motion information results can serve as the research references of medical treatment, gym, bionics, and so on. The sensing method can also be applied to other fields of the human motion recognition.
Algorithms ; Arm ; physiology ; Humans ; Image Processing, Computer-Assisted ; Movement ; Video Recording ; methods

Measure for human motion parameters is a main method to generate computer simulation of human motion and to control humanoid robot motion. Recently, extensive researches on this sensing method have been carried out by abroad and domestic researchers. This paper introduces present research status of human motion parameters in order to provide references for scientific research fields of human bionics, humanoid robot, etc.
Computer Simulation ; Humans ; Models, Biological ; Motion ; Robotics ; methods