After the characteristics and necessity of medical informatics experimental course were analyzed, the application of three-stage case teaching in medical informatics experimental course was described, and its steps and methods were explained with the teaching contents of hospital system module used in experimental course as an example. This teaching method can strengthen the knowledge the students have learned.

We examined the basic conditions for cryopreservation of newborn and muscle-stage larvae of Trichinella nativa. Two types of cryoprotectants were examined: dimethyl sulfoxide and glycerol. For cryopreservation of newborn larvae, dimethyl sulfoxide had a cryoprotective effect, and a maximum survival of 96% was obtained under conditions of 10% dimethyl sulfoxide and 30 min equilibration. Muscle-stage larvae, on the other hand, demonstrated a relatively high survival rate (approximately 80%) with 25% glycerol and three hours equilibration regardless of freezing rate. The infectivity of cryopreserved newborn and muscle-stage larvae was examined using different infection methods: direct injection into the abdominal cavity in the former, and either oral infection or direct injection into the duodenum in the later. Cryopreserved newborn larvae showed infectivity to all the subjected mice. By contrast, muscle-stage larvae did not show any infection when infected orally, but one mouse was positive when the larvae were injected directly into the duodenum.

Objective To study the relationship between postoperative complications and preoperative conditions of pancreaticoduodenectomy.Methods The datas from 67 patients underwent pancreaticoduodenectomy involving age,level of albumin and total bilirubin, diabetes mellitus or other merging cruns and postoperative complications and fatality rate were retrospectively analyzed. Results Incidence rate of postoperative complications, was 29.8%; fatality rate was 4.5%. The main complications were pancreatic fistula, abdominal cavity infection, upper digestive tract bleeding, cardiac insufficiency, pneumonia, slash site dehiscence, guts fistula and so on. Conclusion Perioperative and management is important in preventing complications.

Objective To discuss a new temporal bone tomography radiographic technique for the assessment of cochlear implantation and its clinic value. Methods Plane radiographs of both the temporal bone tomography and cochlear position tomography were taken on 10 children after cochlear implantation. The numbers of inserted electrodes of both techniques were compared. Results The inserted electrodes were shown clearly in both techniques. There was no difference in the data be-tween the 2 methods and between the operation and radiography outcomes (P>0.05). Conclusion Temporal bone tomography is a new method to evaluate cochlear implants in postoperative patients.

Objective To evaluate the effectiveness and safety of percutaneous hepatic cryoablation combined with percutaneous ethanol injection(PEI) for patients with hepatocellular carcinoma (HCC) unsuitable for surgical resection. Methods One hundred and five masses in 65 HCC patients underwent percutaneous hepatic cryoablation. The cryoablation was performed using Argon gas as a cryogen in the Cryocare System. Two freeze thaw cycles were performed, each reaching a temperature of -180 ℃ at the tip of the probe. PEI was given 1 or 2 weeks after cryoablation and then once a week for 4 6 weeks in 36 patients with tumor mass larger than 6 cm in diameter. Absolute alcohol(100%) was slowly injected into periphery zone of cancerous tissues in liver. Results During average 16 months follow up duration (ranging 5 to 21 months), 32 patients(49.2%) were alive without tumors, and 22 patients (33.8%) were alive with tumor recurrence: two had bone metastases, three lung metastases and the remaining 17 tumor recurrences in the liver, of whom only 3 developed at a cryoalbation site. Among 41 patients who had been followed up more than one year, there were 32(78%) patients who were alive with or without tumor recurrence. Eight patients (12.3%) died of tumor recurrence. Three patients(4.6%) died of noncancer related causes. Among 43 patients who had undergone CT scan, 38 ( 88.4% ) had a shrinkage of tumor mass. Among 22 patients who had received biopsies of cryoablated tumor mass, all but one biopsy showed necrotic or scar tissues. Serum AFP in 91.3% of the patients whose serum AFP had increased before cryoablation returned to normal or nearly normal levels during postoperative 3 6 months. Complications of cryoablation included liver capsular cracking in one patient, transient thrombocytopenia in 4 patients and asymptomatic right sided pleural effusions in 2 patients. Two patients developed liver abscess at the previous cryoablation sites after postoperative 2 and 4 months respectively and recovered after the treatment with antibiotics and drainage. Conclusions Percutaneous cryoablation may offer a safe and effective option for patients with HCC that cannot be surgically removed.

Objective:To investigate the application value of three-dimensional (3D) visualization combined with indocyanine green (ICG) fluorescence imaging in anatomical hepatectomy for hepatocellular carcinoma (HCC).Methods:Clinical data of 45 patients with HCC who underwent anatomical hepatectomy in the Department of Hepatobiliary Surgery, the 900th Hospital of Joint Logistic Support Force of People′s Liberation Army from September 2019 to December 2020 were retrospectively analyzed. Among them, 27 patients were males and 18 were females, aged from 28 to 73 years, aged (57.76±10.95) years on average. According to the different surgical methods, all patients were randomly divided into ICG group ( n=24) and control group ( n=21). In ICG group, 15 patients were males and 9 females, aged (58.21±11.81) years on average. Anatomical hepatectomy was performed using 3D visualization combined with ICG fluorescence imaging. In control group, 12 patients were male and 9 female, aged (57.24±11.35) years on average. Conventional anatomical hepatectomy was performed. The operation duration, bleeding volume, the numbers of cases underwent blood transfusion, occlusion durations, days of hospitalization, highest postoperative serum ALT and TBiL, duration of recovery of postoperative serum ALT and TBiL, and incidence of complications were observed. Measurement data with approximately normal distribution were represented by ( Mean± SD) and groups were compared using t test. Measurement data with skewed or uneven distribution were represented by M (rang) and groups were compared using Man-Whitney U test. Count date were compared using Fisher exact test. Results:All the patients underwent successful operations, without perioperative death. In ICG group, the operation duration was 110.50 (44.00-145.00) min and the occlusion durations was (15.17±2.14) min respectively, shorter than 122.00(80.00-255.00) min and (17.29±4.35) min in control group, the difference between the two groups were statistically significant ( Z=-2.002, -2.115; P<0.05). In ICG group, the numbers of cases underwent blood transfusion was 2 cases, less than 8 cases in control group, the difference between the two groups was statistically significant ( χ2=4.147, P<0.05). The bleeding volume, days of hospitalization, highest postoperative serum ALT and TBiL, duration of recovery of postoperative serum ALT and TBiL, postoperative complications between the two groups were not statistically different ( P>0.05). Conclusions:3D visualization combined with indocyanine green fluorescence imaging technique is a feasible surgical method for anatomical hepatectomy. It is helpful for liver surgeons to visualize and recognize the boundary between hepatic segments and improve the safety of anatomic hepatectomy.

Objective To explore the prevention and treatment of early pulmonary infection after liver(transplant).Methods A retrospective analysis was carried out on the clinical data of 34 cases suffered from post-transplant pulmonary infection among 62 cases of liver transplant.Results Among the 34 cases,27 cases recovered and 7 cases died.The sputum of 27 cases was cultured positive for bacteria and fungus(including) Gram-negative bacteria(51.9%),Gram-positive bacteria(29.6%) and fungus(18.5%),cytomegalovirus 1 case,EB virus in 1 case,and pathogens unknown in 5 cases.Conclusions (Gram-negative) bacteria are the main pathogens of pulmonary infection after liver transplant.The critical stage of pulmonary infection is the first week after operation.The perioperative management of respiratory tract and rational use of antibiotics are important for prevention and treatment of post-transplant pulmonary infection.

Objective To observe the clinical efficacy of thermal electroacupuncture therapy in treating lumbodorsal myofascitis. Method Sixty-two patients with lumbodorsal myofascitis were randomized into a treatment group of 30 cases and a control group of 32 cases. The treatment group was intervened by thermal electroacupuncture therapy, while the control group was by orally taking Meloxicam tablets. The Visual Analogue Scale (VAS) was observed before and after treatment, and the clinical efficacies were compared.Result The total effective rate was 100.0% in the treatment group versus 78.1% in the control group, and the difference was statistically significant (P<0.05). The VAS scores were significantly changed after treatment in both groups (P<0.05). After treatment, the VAS score in the treatment group was significantly different from that in the control group (P<0.05).Conclusion Thermal electroacupuncture therapy is an effective approach in treating lumbodorsal myofascitis.

Objective To investigate the methods for reconstructing portal vein in liver transplantation patients with grade Ⅳ portal vein thrombosis.Methods Clinical data of 6 patients with grade Ⅳ portal vein thrombosis who underwent liver transplantations were analyzed retrospectively.Different portal vein reconstructing approaches were applied: 4 patients underwent portal vein anastomosis with internal organ varicosis vein (group A),and 2 patients underwent portal vein arterialization (group B). Portal venous flow was monitored by intraoperative ultrasound and postoperative liver function was tested periodically during follow-up.Results In group A,one patient died of celiac infection 2 months post-transplantation.The remaining three patients were followed up for 14-17 months,and their portal veins remained smooth without thrombosis and with mitigated esophageal varicosity.In group B,one patient,with recurrent upper gastrointestinal bleeding,died of celiac infection 47 days after liver transplantation.The patient was followed up for 33 months with satisfactory liver and kidney functions although stomach esophagus varicosity was aggravated.Portal vein blood flow in groups A and B was 1258 ± 345 and 2275 ± 247 ml/min respectively after anastomosis by intraoperative color Dopplar ultrasound monitoring. Aspertate aminotransferase (AST) in group B was significantly lower on the fourth day after liver transplantation,and alanine aminotransferase (ALT) in group B was significantly lower on the 3rd,4th,5th and 6th day after liver transplantation than in group A (all P＜0.05).Serum total bilirubin (TBIL) had no statistically significant difference during the 10 days post-operation (P＞0.05).Conclusion Patients with grade Ⅳ portal vein thrombosis may achieve a satisfactory clinical effect by reconstructing portal vein through anastomosis of donor portal vein with internal organ? varicosis vein.PVA may be associated with early recovery of graft function and may be an effective remedial measure for patients with grade Ⅳ portal vein thrombosis who undergo liver transplantation.