Objective To investgate the methods of preoperative diagnosis and management of Mirizzi syndrome.Methods 31 cases of Mirizzi syndrome confirmed by operation were retrospectively analysed.Results The rate of preoperative diagnosis was low (38 71%).All patients were cured by different operation without complication. Conclusions We consider that the key criteria of the diagnosis of Mirizzi syndrome is gallstones cholecystitis with manifested charcot's syndrome occurrence,it could strongly suggest Mirizzi syndrome. The operative method should be selected by the typing of Mirizzi syndrome and the degree of pathological injury .

Objective To summarize the main early complications after pancreatoduodenectomy and analysis of the probable causes.Methods The clinical data of 576 cases who underwent pancreatoduodenectomy(PD) in our department between Feb 1990 and May 2009 were analysed retrospectively.Results There were 92 early postoperative complications occurred in 85 patients(14.8%).Gastrointestinal dysfunction,pancreatic leakage,intra-abdominal infections and hemorrhage were the most of complications,and 7 cases died during perioperative period(mortality 1.22%),among which 3 died of multiple system organ failure,2 died of hemorrhagic shock and 2 died of toxic shock.Preoperative hypoproteinemia and hyperbilirubinemia complicated with a high incidence of postoperative complications on multivariate analysis.Conclusions Meticulous preoperative preparation,delicate intraoperative technigne and close postoperative observation are the key points to decrease early complications and improve the prognosis of the patients who undergo PD.

Objective To explore the classification and surgical management of pancreatic duct stones.Methods The clinical data of 54 patients with pancreatic duct stones who were admitted to the People's Hospital of Hunan Province from June 1994 to November 2009 were retrospectively analyzed. Stones were found in the head of the pancreas (type Ⅰ ) in 31 patients, in the body and tail of the pancreas (type Ⅱ ) in 7 patients, and in all the pancreas (type Ⅲ ) in 16 patients. According to the types of the pancreatic duct stones, ten patients (6 with type Ⅰ , two with type Ⅱ and two with type Ⅲ pancreatic duct stones) received opening of the main pancreatic duct + pancreaticojejunostomy or pancreaticogastrostomy ( group A). Twenty-four patients ( 16 with type Ⅰ and eight with type Ⅲ pancreatic duct stones) received pancreaticoduodenectomy (group B). Fifteen patients (nine with type Ⅰ and six with type Ⅱ pancreatic duct stones) received subtotal resection of pancreatic head preserving duodenum (group C). Five patients with type Ⅱ pancreatic duct stones received resection of the body and tail of the pancreas and the spleen (group D). All data were analyzed using the t test. Results The mean operation time, blood loss, length of postoperative stay and hospital charges of group A were (2.2 ± 1.2)hours,( 127 ±24)ml,( 11.4 ±4.3) days and (3.24 ± 1.15 ) × 104 yuan, respectively. Five out of nine patients who were followed up had stone recurrence. The mean operation time, blood loss, length of postoperative stay and hospital charges of group B were (7.6 ± 1.1 ) hours, (409 ± 37 ) ml, ( 18.9 ± 2.5 ) days and (7.93 ± 1.35 ) × 104 yuan, respectively.No stone recurrence was detected in the 21 patients who were followed up. The mean operation time, blood loss,length of postoperative stay and hospital charges of group C were (4. 1 ± 0.7 ) hours, ( 156 ± 63 ) ml, ( 10.3 ±2.1 )days and (4. 12 ± 1.22) × 104 yuan, respectively. No stone recurrence was detected in the 15 patients who were followed up. The mean operation time, blood loss, length of postoperative stay and hospital charges of group D were (3.3 ± 1.4) hours, ( 185 ± 36 ) ml, ( 9.3 ± 2.0) days and ( 3.22 ± 1.05 ) × 104 yuan, respectively. No complication was detected after the operation, and no stone recurrence was detected in the three patients who were followed up. There were significant differences in the mean operation time, blood loss, length of postoperative stay and hospital charges between patients with type Ⅰ and Ⅲ pancreatic duct stones who received pancreaticoduodenectomy and subtotal resection of pancreatic head preserving duodenum (t = 12. 143, 14. 099, 11. 550, 9. 103,P < 0.05 ). Conclusions Classification of the pancreatic duct stones is important for choosing the proper surgical procedure. Subtotal resection of pancreatic head preserving duodenum is ideal for the treatment of patients with type Ⅰ or Ⅱ pancreatic duct stones.

Objective To explore the reasons,diagnosis and treatment of residual cholecystitis(RCC) with gallstones. Methods The clinical data of 36 RCC patients with gallstones identified by operation were retrospectively analyzed. Results All the 36 patients were cured by reoperation. Residual cholecystectomy was performed on 8 patients, and residual cholecystecomy plus common bile duct exploration and T tube drainage on 28 patients. Thirty one patients were followed up for 3 months to 12 years,93.55% of the patients had good results. Conclusions The main reason of residual cholecystitis with gallstones was not followed the principle of "identify cut identify" during cholecystectomy .The clinical presentation of RCC is similar to that of cholecystitis with gallstones .The accurate rate of auxiliary examinations is low,so the results of these exammations should be analyzed comprehensivly in the diagnosis. The principle of "identify cut identify" should be followed during the reoperation. The common bile duct and common hepatic duct should be opened first and then the residual gall be resected.

Objective To investigate the efficacy of duodenum-preserving pancreatic head resection (DPPHR) for the treatment of chronic pancreatitis combined with type Ⅰ and Ⅲ pancreatic duct stones.Methods The clinical data of 55 patients with chronic pancreatitis and type Ⅰ and Ⅲ pancreatic duct stones who were admitted to the People's Hospital of Hunan Province from June 2008 to June 2013 were prospectively analyzed.All the patients were randomly divided into the pancreatoduodenectomy (PD) group (27 patients) and the DPPHR group (28 patients).There were 18 patients with chronic pancreatitis and type Ⅰ pancreatic duct stones and 9 patients with chronic pancreatitis and type Ⅲ pancreatic duct stones in the PD group.There were 16 patients with chronic pancreatitis and type Ⅰ pancreatic duct stones and 12 patients with chronic pancreatitis and type Ⅲ pancreatic duct stones in the DPPHR group.Patients in the PD group received PD + Child anastomosis + end-toside pancreato jejunal anastomosis + pancreatic stent placement + end-to-side cholangiojejunostomy.Patients in the DPPHR group received free of duodenum + pancreatic duct incision + resection of pancreas at 1 cm ahead of the pancreatic duct + extraction of the pancreatic duct stones + pancreaticoduodenal Roux-en-Y anastomosis.Patients were followed up via out-patient examination till December 2013.The measurement data were analyzed using the t test or Mann-Whitney U test,and the count data were analyzed using the chi-square test.Results During the operation,2 patients in the PD group were converted to the DPPHR group and 1 patient in the DPPHR group was converted to the PD group.No patient died during the perioperative period,and the symptoms including abdominal pain and diarrhea were alleviated at postoperative week 2.The operation time,blood loss,duration of postoperative hospital stay,total expenses and incidence of complications were (7.5 ± 1.6) hours,(460 ± 88) mL,(18.0 ± 3.5) days,(7.8 ± 2.1) × 104 yuan,19.2％ (5/26) in the PD group,and (4.0 ± 1.0) hours,(120 ± 36) mL,(9.5 ± 2.9) days,(3.9 ± 1.2) × 104 yuan,3.4％ (1/29) in the DPPHR group,there were no significant differences in the operation time,blood loss,duration of hospital stay,total expenses and incidence of complications between the 2 groups (t =9.358,11.365,6.325,8.647,x2 =3.976,P ＜ 0.05).Fifty-three patients were followed up,with the median time of 33 months (range,6 months to 5 years).No patient died during the follow-up.Twenty-four patients in the PD group were followed up,2 patients had slight abdominal pain,1 patient had severe abdominal pain due to pancreatic duct stenosis,and the symptom was alleviated after resection of partial pancreas ; the condition of 12 patients was improved among the 19 patients with diabetes.Twenty-nine patients in the DPPHR group were followed up,2 patients had slight pain; the condition of 16 patients were improved among the 22 patients with diabetes.Conclusion DPPHR is an ideal surgical procedure for patients with chronic pancreatitis and type Ⅰ and Ⅲ pancreatic duct stones.

Objective To investigate the character of real-time gray-scale contrast-enhanced ultrasonography (CEUS) and its clinical value in diagnosing hepatic focal lesion. Methods One hundred and three patients with 142 focal hepatic lesions were examined by CEUS after an intravenous administration of the contrast agent, then the characters of the images were analyzed. Results The initial contrast-enhanced signal patterns were classified into 5 modes, peak contrast-enhanced signal patterns into 4 modes, and contrast agent perfusion patterns into 7 modes. Different lesions had different characters of contrast-enhanced phases. The accuracy rate of the CEUS in diagnosing focal hepatic lesion was 93.0%. which was significantly higher than that of conventional ultrasound and contrast-enhanced CT (X2=47.430, P<0.05). Conclusions The characteristic initial contrast-enhanced pattern and contrast agent perfusion pattern are helpful in the differential diagnosis of hepatic focal lesion, while peak contrast-enhanced signal pattern is relatively unreliable. Compared with conventional ultrasound and contrast-enhanced CT, CEUS can dramatically improve the accuracy of qualitative diagnosis of hepatic focal lesion.

Objective:Mineral trioxide aggregate (MTA),a wildly used pulp capping material,could affect the proliferation and differentiation of dental pulp cells.The aim of this study is to study the roles of Notch signalling and autophagy in MTA induced human dental pulp cells (hDPCs) proliferation promotions.Methods:Healthy human third molars were collected and hDPCs were isolated by a combined digestion of collagenase Ⅰ and dispase Ⅱ.MTA extracts of different concentrations (0.5,1.0,2.0,5.0,10.0 mg/mL) were used to test the cytotoxicity by cells counting kit (CCK-8) assays and to select the optimum concentration for hDPCs survival..Expressions of Notch1,Hes1,LC3Ⅱ / Ⅰ and p62 in wild type and MTA treated hDPCs were detected by western blotting.Results:MTA extracts in a concentration of 1.0 mg/mL exerted most profoundly promotion effects on the proliferation of hDPCs among all concentrations tested.MTA of high concentration (10 mg/mL) was toxically to cells.Compared with that of wild type hDPCs,the expressions of Notch1 and Hes1(P＜0.05),or p62 and LC3Ⅱ/Ⅰ (P＜0.01) in MTA treated hDPCs were significantly increased.Much lower expression of Notch1 was detected in hDPCs when autophagy was induced by Earle's balanced salt solution (EBSS) starvation for 24 h.Conclusions:MTA could up-regulated hDPCs proliferation with highly relevant in stimulating Notch1-Hes1 signalling and inhibition of autophagy.The study is supposed to provide new insight in unrevealing the mechanisms of MTA mediated dental pulp cells proliferation.

Post-stroke cognitive impairment (PSCI) is a series of syndromes caused by stroke, involving impairment of one or more cognitive functions, such as attention, language function, executive function, visuospatial cognition, episodic memory and working memory, etc. The traditional treatment methods of PSCI include drug therapy and cognitive training. The treatment modalities are limited and the maintenance effect is not good. Therefore, an auxiliary treatment method is urgently needed to improve its therapeutic effect. Transcranial direct current stimulation (tDCS) is a safe and mature non-invasive brain stimulation technique, which generates weak direct current (1-2 mA) through electrodes placed on the scalp to change the resting membrane potential of neurons, regulate the excitability of the cerebral cortex, so as to achieve the purpose of treatment. This article reviews the effect of tDCS on PSCI, and hopes to provide reference and guidance for its rehabilitation treatment.

Objective To quantitatively observe the value of relationship between nodule and corresponding capsular with ultrasonography in assessment of malignant and benign thyroid nodules.Methods A total of 79 cases with subcapsular tumors of thyroid gland confirmed pathologically were analyzed retrospectively,and the relationship between tumors and capsule was analyzed.Longitudinal diameter of nodules (from the junction of nodule and capsule to the deepest of nodule,V) and distance from nodule protruding thyroid capsule to the highest point of nodule (L) were measured,and L/V was evaluated.Diagnostic efficiency of L/V in diagnosis of malignant thyroid nodule was evaluated.Results The average L/V of benign and malignant nodules was 0.241± 0.041 and 0.162± 0.054,respectively (t=-7.367,P＜0.01).The area under ROC curve of L/V in diagnosis of benign and malignant thyroid nodules was 0.87 (P＜0.01).When L/V=0.225,the sensitivity was 82.17％,and the specificity was 87.53％;when L/V=0.245,the sensitivity was 67.10 ％,and the specificity was 95.12％.Conclusion Ultrasonography can clearly show the relationship between thyroid nodules and capsule,and L/V can be used for differential diagnosis of benign and malignant thyroid nodules.

Objective: To develop a simple radiotherapy information system for the developments of multiple hospital areas. Methods: Using C/S+ B/S dual technology architecture, Visual Studio 2015+ C#+ HTML5+ JavaScript+ PostgreSQL9.5 were utilized as the programming tools selected for development. The two-dimensional barcode, intelligent IC card, identity card recognition, face recognition, speech synthesis and other technologies were integrated and applied in the radiotherapy process management. The normal business processes were designed by default automatic processing. Previous multi-step operation was simplified to single-key operation. Results: System development was completed and implemented at the end of 2017, which connected the south and north hospital areas. The system not only resolved the problem that required the doctors to manually input or make telephone call for consulting patients’ data, but also achieved paperless business process in different departments. The outstanding advantage was reflected in the aspects of intelligence and optimization. Approximately 95% of the normal flows could be completed by single-key automatic processing, and the remaining 5% requiring special operations (such as, modification or deletion, etc.) were prompted and restricted to ensure data security and system stability. Conclusion The application of this system improves the level of information management in the departments and saves the cost of supplies and human resources.