Objective: To evaluate the influence of retention-form design of resin bonded fixed partial dentures(RBFPDs). Methods: Forty-five metal replicas of posterior metal RBFPDs were divided into 3 groups(n=15):C shape(control group), C shape + axial groove, C shape + pin hole. All the replicas were luted with Panavia F cement and subgroup of 5 specimens were subject to 70 N compressive load cycling for 0 cycles, 240 000 cycles , and 1 200 000 cycles respectively .Half of the cycles was on the central fossa of the pontics and half on the buccal inclined surface of the lingual cusp. Forces for dislodgment of the specimens were applied along the long axis of the abutment at a crosshead speed of 1.0 mm /min. The separation forces were recorded as maxium retention force at the time of dislodgement. Results: Se-paration forces of the C shape group (566.82?71.59 N)0.05). After 1 200 000 cycles, the retention force of the RBFPDs decreased significantly (P

Sphincter of Oddi manometry (SOM) is considered the gold standard for the diagnosis of sphincter of Oddi dysfunction (SOD),especially the type Ⅰ SOD.The dysfunction of sphincter of Oddi can lead to other comorbidity.Therefore,SOM is of special importance for such patients.When performing SOM,we need to intubate into the papilla,so it requires high technique and is associated with a relatively higher risk of post-ERCP pancreatitis.Recently,the equipment of SOM is being updated constantly.The use of modified catheter and high resolution gastrointestinal dynamic system for recording and analyzing has made the technology more accurate and safe than ever before.Due to the widespread use of ERCP,SOM is expected to be one of the routine examinations in clinical practice and its application has a promising prospect.This article reviews the latest research progress on SOM in recent years.

Objective To study the effect and value of hepatoarterical catheter chemotherapy in treating gastric carcinoma with liver metastasis. Methods A total of 31 cases of gastric carcinoma with liver metastasis undergoing radical operation were preoperatively randomly divided into 2 groups: Regional infusion chemotherapy (treatment group, 17 cases) and peripheral venous chemotherapy (control group, 14 cases). Results The short-term effectiveness of the treatment group was 88.3 %(15/17). The survival rates of 1, 2, 3 year were 88.2 %, 62.7 %, 28.9 %, respectively. However, the short-term effectiveness of the control group was 28.6 %(4/14). The survival rates of 1, 2, 3 year were 68.1 %, 38.9 %, 13.0 %, respectively. There was obvious difference between the two groups (χ~2 = 12.87, P <0.05;χ~2 =5.511, P<0.01). Conclusion Hepatoarterical catheter chemotherapy is effective for gastric carcinoma with liver metastasis undergoing radical operation and has less toxic side effects.

Objective To learn the clinicians'attitude towards the “Drug and Medical Service Separation” reform in Beijing.Methods A number of pilot hospitals of “Drug and Medical Service Separation” reform in Beijing were pinpointed,for a random questionnaires survey among 800 clinicians,to learn their awareness,evaluation and attitudes to the reform.Results The clinicians were found with good awareness and understanding of the reform,with an awareness rate of 99.5％ ; 72.0％ of them hold that the pricing of “medical service charge” of the reform as reasonable; most of them believe that the reform plays a positive role in relieving the difficulties of seeing doctors and affordability of medical treatment; their approval rate for the reform pilot project is 97.3％; their satisfaction for the reform implementation is 90.8％,and their support for full implementation of the reform is 94.0％.Conclusion The clinicians from those pilot hospitals are sufficiently aware of and understand this policy,and are supportive of the pilot with useful suggestions.The recommended strengthened publicity and training,higher medical service charges,better pay for medical workers,improved incentive mechanism and evaluation mechanism,and better clinicians' satisfaction.

Objective:To evaluate the efficacy and safety of oral prednisone acetate and oral prednisone acetate combined with local injection of triamcinolone acetonide for the prevention of esophageal stricture after endoscopic submucosal dissection (ESD) for early esophageal cancer and precancerous lesions.Methods:Data of 52 patients with early esophageal cancer or precancerous lesions hospitalized from December 2014 to February 2019 in Zhongda Hospital of Southeast University were analyzed retrospectively. They were divided into the control group (group A, n=20), oral hormone group (group B, n=17) and oral medication combined with local injection group (group C, n=15). The rates of stenosis and refractory stenosis, endoscopic dilatation times after ESD, time interval of first dilation after ESD and adverse events related to the operation and administration of glucocorticoids were compared among the three groups. Results:The differences in stenosis rates [85.0% (17/20) VS 47.1% (8/17) VS 46.7% (7/15), P<0.01], rates of refractory stenosis [75.0% (15/20) VS 23.5% (4/17) VS 20.0% (3/15), P<0.01], and endoscopic dilatation times [3.50 (2.25, 6.00) VS 0.00 (0.00, 2.50) VS 0.00 (0.00, 2.00), P<0.01] were statistically significant among the three groups. In pairwise comparison, the above indicators in group B and group C were significantly lower or less than those in group A ( P<0.05), but there were no statistical differences between group B and group C ( P>0.05). The time intervals of the first dilation after ESD were significantly different among the three groups (27.7±9.4 d VS 110.1±46.0 d VS 147.4±9.4 d, P<0.01). In pairwise comparison, the first dilation intervals in group B and group C were longer than that in group A ( P<0.01), and this indicator in group C was longer than that in group B ( P<0.01). Two patients in the control group developed perforation after ESD but they were treated actively and recovered finally. No severe ESD, steroid, or perforation related adverse events occurred in any other patient of the three groups. Conclusion:Both oral prednisone and oral prednisone combined with local injection of triamcinolone acetonide after ESD can effectively and safely prevent esophageal stricture after ESD. Oral administration combined with local injection of corticosteroids can prolong the time interval of the first dilation after ESD, which is beneficial to the psychological recovery and the improvement of patients’ life quality after the operation.

AIM To study the chemical constituents from Buthus martensii Karsch.METHODS The dichloromethane and 70％ methanol fractions of B.martensii extract were isolated and purified by silica,ODS,Sephadex LH-20 and mid-pressure preparative column,then the structures of obtained compounds were identified by physiochemical properties and spectral data.RESULTS Nine compounds were isolated and identified as cholest4-en-3-one (1),cholesterol (2),uracil (3),1-stearyl-2-lyso-sn-glycero-3-phosphatidylcholine (4),glycerol (5),oleic acid (6),proline (7),alanine (8),leucine (9).CONCLUSION Compounds 1,4,5 are isolated from B.martensii for the first time.

Objective To compare surgical gastrojejunostomy and endoscopic stenting in palliation of malignant gastric outlet obstruction.Methods This retrospective study investigated patients treated for malignant gastric outlet obstruction from January 2007 to January 2014 in the first affiliated hospital of Nanjing Medical University.Endoscopic stenting was placed in 29 patients and surgical gastrojejunostomy was performed in 42 patients.The outcomes assessed included diet scores,time to diet,length of hospital stay,treatments fees and complications.Results Both endoscopic stenting and surgical gastrojejunostomy can relieve patients' syndrome with significant higher GOOSS score compared with that before treatment (P ＜0.05),but score improves faster in stenting group.Clinical success for endoscopic stenting and surgical gastrojejunostomy was 96.6％ and 92.9％ respectively,and technical success was 100％ for both of them.Endoscopic stenting group was found to have lower early complication rate(3.4％ VS 23.8％,P ＜0.05),higher late complication rate(24.1％ VS 6.9％,P ＜0.05),less time to diet,hospital stay and treatment fees(all P value ＜ 0.05)than surgical gastrojejunostomy group.The major complication after endoscopic stenting is re-obstruction while it is infection and leak of anastomotic site for surgical group.There were no significant differences in complication between two groups (27.6％ VS 11.9％,P ＞ 0.05).Conclusion Both endoscopic stenting and surgical gastrojejunostomy can relieve patients' syndrome effectively and safely,but endoscopic stenting improves GOOSS scores more rapid with less time to diet,less early complication rate and easy-dealing late complications,also it needs less hospital stay and fees.It's a better choice for patients with less survival expectation.

Objective:To evaluate the efficacy and safety of digital cholangioscopy-assisted non-radiation endoscopic retrograde cholangiopancreatography (ERCP) for common bile duct stones.Methods:Clinical data of patients who underwent digital cholangioscopy-assisted non-radiation ERCP for common bile duct stones from May 2019 to September 2021 were reviewed. The baseline data, the success rate of cannulation, the one-time success rate of endoscopic stone removal, the operation time, total hospital stay, complications, and recurrence of bile duct stones were analyzed.Results:A total of 170 patients were included, and bile duct stones were detected in 156 (91.8%) patients with the long diameter of 7.7±4.1 mm under preoperative imaging examination. Bile duct stones were detected under choledochoscopy and were successfully removed by using digital cholangioscopy through non-radiation ERCP. The success rate of cannulation was 100.0% (170/170) . The one-time success rate of endoscopic stone removal was 96.5% (164/170), and 6 patients (3.5%) received secondary stone removal for large stones (long diameter>30 mm).The time of biliary exploration and whole non-radiation ERCP were 9.6±2.7 min (6-24 min) and 35.9±17.3 min (13-85 min), respectively. The total hospital stay was 6.3±2.2 days (5-10 days). Postoperative pancreatitis occurred in 3 patients (1.8%), all of whom were mild and resolved after symptomatic treatment. No recurrence of bile duct stones was seen in any patient over 1-month postoperative follow-up.Conclusion:Digital cholangioscopy-assisted non-radiation ERCP is safe and effective for common bile duct stones without ray exposure, which is worth of promotion.

OBJECTIVE: Ambulance personnel who witness trauma experienced by patients have been reported to experience positive changes, known as vicarious posttraumatic growth (VPTG). We examined VPTG and its relationship with social support and resilience among ambulance personnel. METHODS: The sample (n=227) was recruited from six emergency centers in China. The measures included the Posttraumatic Growth Inventory (PTGI), the Social Support Rating Scale (SSRS), and the 10-item Connor-Davidson Resilience Scale (CD-RISC-10). Structure Equation Modeling (SEM) and the bootstrapping procedure were used to examine indirect effects. RESULTS: The participants' mean score for VPTG was 68.96 (SD=15.51). Social support had significant direct effects on resilience (β=0.51, p < 0.001) and VPTG (β=0.25, p=0.001), and resilience (β=0.58, p < 0.001) had a significant direct effect on VPTG. Furthermore, social support had a significant indirect effect (0.51×0.58=0.30, p < 0.001) on VPTG through resilience. CONCLUSION: Although the nature of the work of ambulance personnel is not expected to change, the negative effects of the trauma they encounter can be reduced by providing them with more support resources and interventions to foster their resilience, which in turn, promote VPTG.
Ambulances* ; China* ; Emergencies ; Humans