An experimental study on long term outcomes after magnetic esophageal compression anastomosis in piglets.

BACKGROUND/PURPOSE: Previous studies have shown that a patent, watertight esophageal anastomosis can be accomplished safely using specially-shaped magnets in piglets. However, it is unclear whether such a magnetic esophageal compression anastomosis (MECA) remains patent in the long-term. The purpose of this study was to evaluate the long-term outcome of MECA in an experimental pig model over an observation period of 2 months. METHODS: Ten piglets underwent creation of an MECA with custom-made 8 mm magnets and a U-shaped esophageal bypass loop to allow peroral nutrition at eight weeks of life. Two weeks later, the bypass loop was closed surgically, requiring the pigs to swallow via the newly created magnetic compression anastomosis. The pigs were fed soft chow for 2 months. They were monitored for weight gain and signs of dysphagia. At the endpoint of two months, esophagoscopy and contrast esophagography was performed. After removal of the esophagus, the tissues were macroscopiocally and histologically assessed. RESULTS: Six piglets survived until the endpoint. In two pigs, closure of the bypass loop failed, these demonstrated mean weight gain of 792 gs/day [95% Confidence interval 575 to 1009 gs/day]. Weight gain in four pigs that exclusively fed via the magnetic anastomosis averaged 577 gs/day [95% confidence interval 434 to 719 gs/day (p = 0.18)]. There were no signs of dysphagia. All magnets passed with the stool within 16 days. After 2 months, a well-formed magnetic compression anastomosis was visible and easily negotiated with a 6.5 mm endoscope. Esophogram and macroscopic findings confirmed patentency of the esophageal anastomoses. Histopathology showed a circular anastomosis lined with contiguous epithelium. CONCLUSION: MECA creates a long-term functional and patent anastomosis in pigs. This concept may facilitate minimally-invasive esophageal atresia repair by obviating a technically challenging and time-consuming hand-sewn anastomosis.

A detailed analysis of pediatric surgical malpractice claims in Germany: what is the probability of a pediatric surgeon to be accused or convicted?

AIM OF THE STUDY: Pediatric surgeons treat a vulnerable population in which unfavorable outcome can lead to substantial long-term costs, placing them at risk for malpractice claims. This study aims to characterize the frequency and circumstances in which malpractice claims were successfully brought against pediatric surgeons in Germany over the last 5 years. MATERIALS AND METHODS: Anonymous data on medical treatment errors and payments were acquired from the Federal Chamber of Physicians from 2014 through 2018 and analyzed for most frequent diagnoses and circumstances that resulted in accusation or conviction. Those claims that were successfully rebutted were compared to as controls. Lifetime risk for being involved in litigation and its outcome was calculated. RESULTS: There were 129 medical malpractice claims over the 5-year observation period. Medical error was confirmed in 56 cases (43%); the rest were successfully appealed. The risk of the prototypical German pediatric surgeon to be accused was 5.24% and to be convicted 2.27% per year in practice. The most common reasons for conviction (alone or in combination) were surgical-technical errors (23%), treatment delay (21%), insufficient workup (17%), incorrect diagnosis (17%), and incomplete consent (16%).The most frequent circumstances leading to a conviction were trauma (27%), inguinal hernia (7%), circumcision (7%), testicular torsion (7%), acute abdomen (7%), and appendicitis (5%). CONCLUSION: Over a 40-year career, pediatric surgeons in Germany face an average calculated risk of 2.1 to be accused and 0.9 to be convicted of malpractice claims. Certain circumstances pose higher risks for litigation than others. Knowledge of these patterns may help practitioners avoid medicolegal confrontation.