COVID-19: a catalyst for the digitization of surgical teaching at a German University Hospital.

BACKGROUND: The summer semester 2020, had to be restructured due to the SARS-CoV-2 pandemic and the associated contact restrictions. Here, for the first time, the established lectures in lecture halls and small group seminars could not be conducted in presence as usual. A possible tool for the implementation of medical teaching, offers the use of eLearning, online webinars and learning platforms. At present it is unclear how the SARS-CoV-2 pandemic will affect surgical teaching, how digitization will be accepted by students, and how virtual teaching can be expanded in the future. METHODS: The teaching, which was previously delivered purely through face-to-face lectures, was completely converted to digital media. For this purpose, all lectures were recorded and were available to students on demand. The seminars were held as a twice a week occurring online webinar. The block internship was also conducted as a daily online webinar and concluded with an online exam at the end. At the end of the semester, a survey of the students was carried out, which was answered by n = 192 students with an anonymized questionnaire. The questionnaire inquires about the previous and current experience with eLearning, as well as the possibility of a further development towards a purely digital university. RESULTS: There were n = 192 students in the study population. For 88%, the conversion of classes to web-based lectures represented their first eLearning experience. For 77% of all students, the digitization of teaching led to a change in the way they prepare for class. 73% of the participating students are of the opinion that eLearning lectures should continue to be offered. 54% of the students felt that eLearning lectures made more sense than face-to-face lectures. A purely virtual university could be imagined by 41% of the students. CONCLUSION: The conversion of teaching represented the first contact with eLearning for most students. Overall, the eLearning offering was experienced as positive. Due to the new teaching structure, the way of learning had already changed during the semester. Based on the new eLearning content, the already existing formats can be further expanded in the future. Nevertheless, it turned out that the practical-surgical contents and skills cannot be adequately represented by purely online offers; for this, the development of hybrid practice-oriented teaching concepts is necessary.

Role of biliary drainage before pancreatoduodenectomy for pancreatic adenocarcinoma: a retrospective study.

BACKGROUND: Utilization of preoperative biliary drainage prior to pancreatoduodenectomy for patients with pancreatic ductal adenocarcinoma and obstructive jaundice remains controversial. METHODS: All patients that underwent pancreatoduodenectomy for pancreatic ductal adenocarcinoma at the authors' institution were analyzed retrospectively to evaluate the effect of endoscopic biliary drainage on postoperative outcomes and long-term survival. Age, gender, ASA-Score, operative time, blood loss, intraoperative transfusion rate, and postoperative complications, including postoperative pancreatic fistula, delayed gastric emptying, bleeding, bile fistula, wound infections, sepsis, pulmonary and cardiac complications as well as the need for relaparotomy were analyzed. RESULTS: Two hundred eighty-five patients with similar baseline characteristics underwent pancreatoduodenectomy, 151 patients with biliary drainage (group 1) and 134 without drainage (group 2). More than 60% of patients had one or more postoperative complications, without significant difference between the two groups (P=0.140). The overall incidence of pancreatic fistula was 21.75% in both groups (group 1: 19.87% vs. group 2: 23.88%, P=0.659). Wound healing impairment was the only postoperative complication that differed significantly between the two groups (group 1: 24.50% vs. group 2: 8.96%, P<0.001). In multivariate risk analysis, biliary drainage was the only independent risk factor for wound healing impairment (OR 4.126; 95% CI: 1.295-13.143; P=0.017). The median overall survival was similar in both groups. CONCLUSIONS: Preoperative endoscopic biliary drainage is associated with an increased risk for wound healing impairment and wound infections. Therefore, biliary drainage should not be used routinely in patients with obstructive jaundice prior to pancreatoduodenectomy.

Introduction of laparoscopic Ivor Lewis esophagectomy as hybrid procedure and comparison with open esophagectomy. A propensity-matched retrospective study.

BACKGROUND: Esophagectomy is associated with increased rate of postoperative complications, making it one of the procedures with the highest impact on patients' quality of life. Hybrid Ivor Lewis esophagectomy (HMIE) has been introduced in our clinic with the aim to reduce postoperative morbidity, without compromising on oncological outcomes. We conducted this survey to evaluate the perioperative morbidity of the new method during the introduction phase compared to open esophagectomy in two similarly matched groups of patients. METHODS: This study included the first 17 patients who underwent HMIE for esophageal cancer at a high-volume tertiary center. After generating propensity scores using the variables age, body mass index, pulmonary comorbidities, cardiac comorbidities, histologic type, and neoadjuvant treatment, 17 patients in the hybrid group were matched with 17 patients in the open group. Surgical outcomes, oncological outcomes, and postoperative complications according to the guidelines of the Esophageal Complications Consensus Group were compared between the two groups. RESULTS: Surgical and oncological outcomes were comparable between the two approaches. The rate of postoperative complications, including surgical, gastrointestinal, and pulmonary complications, were similar in the two groups. CONCLUSIONS: Our hypothesis that laparoscopy could reduce postoperative complications was not confirmed. HMIE is a safe procedure, resulting in radical oncological resection and similar morbidity with open esophagectomy. Surgeons, who are proficient in open approach and laparoscopic anti-reflux and gastric surgery, can safely adopt the hybrid approach without significant learning curve associated morbidity.

Thermoablation of thyroid nodules reveals excellent results with low morbidity.

BACKGROUND: Thermoablation is an attractive treatment of thyroid nodules for its minimal-invasiveness. It remains unclear whether results and morbidity meet the patients' expectations. OBJECTIVE: The aim of the presented study is to show data obtained after microwave thyroid ablation from a patients' perspective. METHODS: Indications and preoperative diagnosis were chosen according to international guidelines. Thermoablation was achieved using a CE certified microwave system. The procedures heeded the published recommendations of the European Federation of Societies for Ultrasound in Medicine and Biology. Follow-up included ultrasound, laboratory parameters and a standardized questionnaire. RESULTS: Thirty patients were enrolled into the study. All patients reported an improvement of complaints following the procedure. Scar formation occurred in 3 cases (10%) with 0.5 ± 1.3 mm length and 0.4 ± 1.0 mm width. No cosmetic, neurological, vocal or pharyngeal complication occurred. Energy required for non-functioning nodules (n= 15, 50%) was 2.56 ± 3.41 kJ/mL, for autonomous adenoma (n= 8, 27%) 0.96 kJ/mL (p< 0.05, t-test). CONCLUSION: The presented data summarize an initial experience in selected patients and resemble excellent patient reported outcome with minimal morbidity. These preliminary data indicate the majority of patients satisfied with the procedure. Further trials will be required to endorse these findings.

Minimally Invasive Cholecystectomy: Transvaginal or Transabdominal Approach-Which Technique Is Preferred by Female Hospital Employees?

Background: Evidence is lacking concerning a clear benefit of single-port laparoscopic cholecystectomy (SILC) and transvaginal cholecystectomy (TVC) over the classical laparoscopic cholecystectomy (CLC). In this study, we investigated the preferences of the operation techniques among female employees in a tertiary university clinic. Materials and Methods: Study participants in the department of general surgery and gynecology were interviewed regarding their personal felt preferences for the mentioned procedures using a standardized illustrated questionnaire. Results: A total of 111 participants were included in the study. In 70.3% of cases, the transvaginal approach was unknown. The classical techniques were preferred in 95.2% of respondents. Participants with a wish for children showed a higher preference for nontransvaginal techniques (P = .011). The acceptance rate of transvaginal techniques among employees of the department of gynecology was higher than those of the department of general surgery (P = .028). Conclusions: The overall acceptance rate for TVC is low. Especially in case of a wish for children, SILC and CLC represent the preferred techniques. The lack of popularity of TVC could be an explanation for the refusal of this technique. Among employees of the gynecologic department, a transvaginal approach was significantly more often accepted. The cosmetic outcome and the knowledge about an operation technique certainly influence the decision making for the preferred surgical method.

Microwave ablation compared with radiofrequency ablation for the treatment of liver cancer: a systematic review and meta-analysis.

BACKGROUND: Guidelines have reported that although microwave ablation (MWA) has potential advantages over radiofrequency ablation (RFA), superiority in efficacy and safety remain unclear. Aim of the study is to compare MWA with RFA in the treatment of liver cancer. METHODS: Meta-analysis was conducted according to the PRISMA guidelines for studies published from 2010 onwards. A random-effects model was used for the meta-analyses. Complete ablation (CA), local tumor progression (LTP), intrahepatic distant recurrence (IDR), and complications were analyzed. RESULTS: Four randomized trials and 11 observational studies with a total of 2,169 patients met the inclusion criteria. Although overall analysis showed no significant difference in LTP between MWA and RFA, subgroup analysis including randomized trials for patients with hepatocellular cancer (HCC) demonstrated statistically decreased rates of LTP in favor of MWA (OR, 0.40; 95% CI, 0.18-0.92; p = 0.03). No significant differences were found between the two procedures in CA, IDR, complications, and tumor diameter less or larger than 3 cm. CONCLUSIONS: MWA showed promising results and demonstrated better oncological outcomes in terms of LTP compared to RFA in patients with HCC. MWA can be utilized as the ablation method of choice in patients with HCC.

[Gallstone disease - interdisciplinary treatment]. / Gallensteine ­ interdisziplinäre Behandlung.

Gallstones develop in the gallbladder or the bile ducts. According to their chemical composition, gallstones can be divided into cholesterol stones, which are common, and the rare bile pigment stones. Altogether, up to 20 % of all adults develop gallstones and more than 20 % of them symptoms or complications. Female sex, age, pregnancy, physical inactivity, obesity, overnutrition and genetic factors such as ABCB4 deficiency of the hepatic lecithin transporter are kown risk factors for gallstone formation. In about one half of all patients biliary symptoms precede the three common and potentially life-threatening complications (acute cholecystitis, acute cholangitis and biliary pancreatitis). Although our knowledge about the genetics and pathophysiology of gallstones has improved, current treatment algorithms are predominantly invasive (ERC and surgery). Thus, better strategies are needed to prevent the formation of gallstones in general.

[Patient satisfaction after thyroidectomy - the width of the scar is more important than the length]. / Patientenzufriedenheit nach Thyreoidektomie ­ die Breite der Narbe ist wichtiger als die Länge.

OBJECTIVE: To avoid a scar on the neck, alternative methods of thyroidectomy have been developed. The aim of our study was to determine the significance of the scar and the factors influencing satisfaction after classical thyroidectomy in the long term. MATERIAL AND METHODS: 228 patients who underwent partial or total thyroidectomy for benign thyroid disease between 2001 and 2014 participated in a telephone interview. In addition to patient satisfaction, demographic data, the subjective appearance of the scar, and subjective complaints were recorded. RESULTS: 93.8 % of the patients were satisfied with the treatment. Female and younger patients tended to be more dissatisfied than both male and older patients. The mean scar length was 6.03 ± 2.36 cm and the mean scar width was 2.01 ± 1.46 mm. The length of the scar did not affect satisfaction. In contrast, patients with a wider prominent or conspicuously stained scar were significantly more dissatisfied. Patients who suffered from symptoms such as pressure or difficulty swallowing postoperatively were also significantly more dissatisfied. Cosmetic problems affect satisfaction more than functional problems. CONCLUSIONS: Satisfaction after thyroidectomy is good in the long term. Whether satisfaction can be further improved by using an alternative or minimally invasive procedure is questionable. These procedures may be an alternative for younger and female patients or those who focuses on cosmetics.

Effect of bosentan therapy on ventricular and atrial function in adults with Eisenmenger syndrome. A prospective, multicenter study using conventional and Speckle tracking echocardiography.

BACKGROUND: The effect of bosentan on the ventricular and atrial performance in patients with Eisenmenger syndrome is unclear. In adult patients with Eisenmenger syndrome, we aimed to evaluate the midterm effect of bosentan on physical exercise, ventricular and atrial function, and pulmonary hemodynamics. METHODS: Forty adult patients before and after 24 weeks bosentan therapy underwent 6 min walk test, two-dimensional speckle tracking echocardiography, plasma NT-proBNP measurement and cardiac catheterization. RESULTS: After 24 weeks, bosentan therapy an improvement was observed regarding the 6 min walk distance from a median (quartile 1-quartile 3) of 382.5 (312-430) to 450 (390-510) m (p = 0.0001), NT-proBNP from 527.5 (201-1,691.25) to 369 (179-1,246) pg/ml (p = 0.021), right ventricular mean longitudinal systolic strain from 18 (13-22) to 19 (14.5-25) % (p = 0.004), left ventricular mean longitudinal systolic strain from 16 (12-21) to 17 (16-22) % (p = 0.001), right atrial mean peak longitudinal strain from 26 (18-34) to 28 (22-34) % (p = 0.01) and right atrial mean peak contraction strain from 11 (8-16) to 13 (11-16) % (p = 0.005). The invasively obtained Qp:Qs and Rp:Rs did not significantly change under bosentan therapy. CONCLUSIONS: In adult patients with Eisenmenger syndrome, bosentan therapy improves ventricular and atrial functions resulting in enhancement of physical exercise and reduction in the NT-proBNP level, while the pulmonary vascular resistance does not change substantially.