Objective　To investigate the feasibility of hypocaloric nutrition support in elderly patients.Methods　Sixteen elderly patients ( ＞ 85 years) were treated with hypocaloric nutrition for 4 weeks. The calorie intake was 75-96 kJ·kg-1·d -1 , including 44％ -59％ of carbohydrates ( 137-207 g·d -1 ) , 26％ -42％ of lipids (40-67 g·d-1) , and 14％-16％ of proteins (0.7-0.9 g·kg-1·d-1). Nonprotein calorie-to-nitrogen ratio was 131∶1-150∶1. After 4 weeks of treatment, changes in blood routine test, biochemistry, and clotting function were compared with those before hypocaloric nutrition support. Results　After hypocaloric nutrition support, the plasma proteins, blood fats, and lymphocytes in these 16 elderly patients were well maintained, and no obvious adverse effect on clotting function or liver/kidney functions was observed. Conclusion　Hypocaloric nutrition support is safe and effective for elderly patients who are older than 85 years.

2cm) and undifferentiated type were significantly related to lymph node metastasis in submucosal cancer. No lymph node metastasis was observed in 25 patients with submucosal invasion who showed none of the three risk factors, whereas 72.7% (8/11) of patients with all the three factors had lymph node metastasis. Conclusion The tumor size and lymphatic vessel involvement are related with lymph node metastasis in mucosal cancer. Poor differentiation, tumor size and lymphatic vessel involvement are related with lymph node metastasis in submucosal cancer.

Objective To analyze clinicopathological characteristics of recurrence after gastrectomy for early gastric cancer. Methods 308 patients were treated surgically for early gastric cancer from 1983 to 2005. 245 patients were followed up after gastric resection.Clinicopathologic factors were investigated by using univariate methods and multivariate analysis for the possible relationship to recurrence. Results 30 patients developed recurrent disease (median 28 months). The 1-year, 3-year, 5-year, 7-year, 10-year and 15-year recurrent rates were 5.49%, 8.44%, 11.27%, 14.83%, 16.39% and 37.79%, respectively. 13 patients with mucosal gastric cancer developed recurrent disease (median 24 months). The 1-year, 3-year, 5-year, 7-year, 10-year and 15-year recurrent rates were 4.23%, 6.68%, 7.75%, 9.34%, 9.34% and 28.24%, respectively. 17 patients with submucosal gastric cancer developed recurrent disease (median 31 months). The 1-year, 3-year, 5-year, 7-year, 10-year and 15-year recurrent rates were 7.39%, 11.14%, 16.54%, 24.49%, 29.69% and 64.85%, respectively. Cox multivariate analysis showed that submucosal invasion (P=0.044, OR=2.172) was a positive independent risk factor and paracarcinomatous mucosal medium-severe intestinal metaplasia (P=0.047, OR=0.460) was a negative independent risk factor for recurrence. 76.7% (23/30) patients with recurrence did not have indication of resection for a cure, and they did not undergo surgery again. 23.3% (7/30) patients with recurrence had indication for curative resection, and 4 of whom underwent curative resection, but 3 did not because of poor health. Pathological examination after surgery showed that in 3 patients there was early gastric cancer in the remnant stomach without lymph node metastasis, and in one patient there was advanced gastric cancer in remnant stomach with regional lymph node metastasis. The patient with advanced gastric cancer survived for 28 month without detectable tumor. Logistic regression analysis showed paracarcinomatous mucosal medium-severe intestinal metaplasia (P=0.016, OR=17.000) was a positive independent predictor for second radical surgery. The follow-up examinations including endoscopy were performed in 86.7% (26/30) of patients after operation at least every 1-2 years. Conclusion Early gastric cancer patients with submucosal invasion have a high risk of recurrence, and those with paracarcinomatous mucosal medium-severe intestinal metaplasia have a low risk of recurrence. The patients with paracarcinomatous mucosal medium-severe intestinal metaplasia and cancer recurrence are feasible for a curative resection. The follow-up examinations including endoscopy every 1 or 2 years contributed highly to finding an early recurrent cancer in the remnant stomach. But it is not so helpful to increase the possibility of a curative surgery in patients with recurrence and metastasis after gastrectomy.

Objective To investigate the clinical value of serum CEA, CA19-9 and CA724 in patients with colonic carcinoma. Methods Serum levels of CEA, CA19-9 and CA724 were detected with ELISA in 89 patients suffering from colonic cancer. Results The positive rates of CEA, CA19-9 and CA724 in Dukes' stages C and D patients were remarkably higher than those in Dukes' stages A and B patients(64% vs 26%,46% vs 22%,26% vs 8% respectively, P

Objective To sum up the trend of changes in symptoms of prolonged symptomatic gastroesophageal reflux(GERD), and discuss the relationship between reflux symptoms and the medical treatment in the elderly patients with GERD. Methods 98 elderly GERD patients over 60 years old were followed up for 5 years through questionaires. The changes of reflux symptoms and effect of medication were analyzed. Results Reflux symptoms were improved in 71 subjects (72.4%), disappeared in 10, worsened in 9, and remained unchanged in 18. The symptom improvement rate of medication group was significantly higher than that of non-medication group(P0.05). In 62 subjects who modified their life styles and diet habits, 53 of them had their symptoms improved (85.5%), and 9 of them had their symptoms unchanged (14.5%). Among 98 patients who underwent endoscopic examination, 44 were found to have erosive esophagitis, and were diagnosed as reflux esophagitis(RE). Although the other 54 subjects complained of typical "heart burn" and regurgitation symptoms, no erosive esophagitis was found with endoscopy, and they were regarded designated as having non-erosive reflux disease(NERD). The symptom improvement rate of NERD group was significantly higher than that of RE group(P

Esophageal manometry and 24 hour pH monitoring were performed in elderly control group,non elderly control group,elderly and non elderly gastroesophageal reflux disease (GERD) patients with or without sliding hiatal hernia(HH).Elderly patients with GERD and HH showed a lower LESP compared with elderly GERD patients without HH and elderly controls.Non elderly patients with GERD and HH also showed a lower LESP compared with non elderly controls.Elderly GERD patients with HH showed a lower pressure of contraction at the distal esophagus compared with elderly GERD patients without HH.Extent of reflux had no difference between elderly GERD patients with and without HH.The results suggested that HH affect esophageal antireflux function and peristalsis of the distal esophagus in elderly and non elderly GERD patients,especially in elderly GERD patients,but it could not significantly increase esophageal acid exposure in elderly GERD patients.

Objective To explore the type of the rational digestive reconstruction after total gastrectomy for gastric malignancy.Metlhods Three types of digestive reconstruction were performed after total gastrectomy in 121 cases with gastric carcinoma.The operating time,morbidity and mortality,digestive tract symptoms,nutritional status in 1 year after operation were compared.Results There were no signifioant differences among the three procedures in operative morbidity and mortality,postoperative food intake,nutritional status,incidences of diarrhea and dumping syndrome.Roux-en-Y esophajejunostomy and P-type esophajejunostomy had an advantage d anti-esophageal reflux,and are obviously superior to Lahey + Braun anastomosis.Roux-en-Y esophajejunostomy was simpler with shorter operating time and less complication.Condusion Roux-en-Y esophajejunostomy and P-type esophajejunostomy could be recommended as suitable methods for digestive reconstruction after total gastrectomy.

BACKGROUND:At present,there is still controversy in clinical practice about the choice of internal fixation of Pauwels type Ⅲ femoral neck fracture,and the selection of internal fixation that provides stable fixation strength is the key basis for achieving Pauwels type Ⅲ fracture fixation. OBJECTIVE:The three-dimensional finite element analysis method was used to test the difference in biomechanical strength of three types of internal fixation in Pauwels type Ⅲ femoral neck fracture,which provided a reference for its clinical treatment. METHODS:Using the CT data of the left femur of a healthy male volunteer,a complete femur and its cancellous bone were reconstructed in Mimics software,and Geomagic studio software was used for reverse modeling.Cannulated compression screw,dynamic hip screw,and femoral neck system were created in UG-NX software.Three kinds of internal fixation models were assembled on the femur model,and Pauwels type Ⅲ femoral neck fracture was simulated by Hypermesh software.Finally,Abaqus software was used to carry out finite element experimental analysis to analyze and compare the stress distribution,stress peak,strain,and displacement distribution caused by fixed femoral neck fracture of different internal fixation systems. RESULTS AND CONCLUSION:(1)The stress of the proximal femur bone mass was mainly distributed in the area below the femoral neck near the fracture end,with the highest stress peak in the dynamic hip screw group and the smallest in the femoral neck system group.(2)The stress distribution of the internal fixation device was mainly concentrated on the screw surface near the fracture line,with the highest stress peak in the femoral neck system group and the smallest in the dynamic hip screw group.(3)The main strain field of the proximal femur bone mass was distributed in the upper surface area where the bone and screw contacted,and the yield strain was the smallest in the femoral neck system group and the largest in the cannulated compression screw group.(4)The main strain field of the internal fixation device model was distributed on the upper surface of the femoral neck screw,with the yield strain being the smallest in the femoral neck system group and the largest in the cannulated compression screw group.(5)The displacement distribution values of femur,proximal bone mass,distal bone block,internal fixation device and internal fixation with the femur as a whole in the three femoral neck fracture internal fixation models decreased gradually from proximal to distal,and the peak displacement of the femoral neck system group was the largest and the lowest in the dynamic hip screw group.(6)The results showed that when the Pauwels type Ⅲ femoral neck fracture was fixed,the stress distribution of femoral neck system was more uniform,the mechanical conduction characteristics were better,and it was subjected to lower yield strain,higher stress and higher displacement.It has relatively better biomechanical stability and can provide a superior mechanical environment for fracture healing.

BACKGROUND:In recent years,some scholars in the field of tendon bone injury have attached stromal cell-derived factor 1 to tissue engineering scaffolds to promote tendon bone healing,and achieved good results.However,whether stromal cell-derived factor 1 promotes tendon bone healing mechanisms and participates in the repair of natural healing has not yet been defined. OBJECTIVE:To study the expression of stroma-cell derived factor 1 during tendon bone healing after rupture of the whole supraspinatus muscle of the rabbit rotator cuff and its migration effect and optimal in vitro migration promoting concentration on stem cells during tendon bone injury. METHODS:Totally 18 adult New Zealand rabbits were randomly selected to establish rotator cuff injury models,and an additional 3 rabbits were selected as blank controls.At 3,5,7,14,21,and 28 days after modeling,three rabbits were executed separately and the rabbits in the blank group were sacrificed.The tissues of tendon bone junction were taken and stored in a-80℃refrigerator.The expression of stromal cell-derived factor 1 was detected by ELISA at each time point after injury.Mesenchymal stem cells were isolated from the bone marrow of young rabbit femur,cultured,and identified.Transwell assay was performed to verify the migration-promoting effect of stromal cell-derived factor 1 on stem cells and the optimal migration-promoting concentration in vitro.The stem cells cultured to P3 were co-cultured with BrdU and injected into the rabbit ear marginal vein,and immunohistochemical staining was used to verify whether the stem cells migrated to the injury site. RESULTS AND CONCLUSION:(1)Stromal cell-derived factor 1 gene expression was bimodal during rotator cuff tendon bone healing.Stromal cell-derived factor 1 gene expression increased significantly at 3 days post-injury(P<0.01)and then decreased,reaching a minimum at 5 days post-injury.It increased again and reached a peak 14 days after injury(P<0.01)and then decreased.(2)Cell immunohistochemical staining displayed that stem cells labeled with BrdU did migrate to the injury site.(3)The results of the transwell experiment exhibited that 60-80 ng/mL stromal cell-derived factor 1 had the best effect on promoting migration of stem cells,while a concentration of 200 ng/mL inhibited migration.(4)Stromal cell-derived factor 1 is involved in the healing of rotator cuff tendon bone during the inflammatory response phase and the proliferation phase.The mechanism of action may be to promote the migration of stem cells to the injury and their differentiation into various types of cells to promote repair.In addition,the pro-migration effect of stromal cell-derived factor 1 exists at a range of concentrations,beyond which it may act as an inhibitor.