Development of a Low-Cost, High-Fidelity, Reusable Model to Simulate Clamshell Thoracotomy.

OBJECTIVE: Clamshell thoracotomy (CST) is an emergency procedure performed during traumatic cardiac arrest. Emergency physicians and surgeons are expected to perform this procedure in the Emergency Department. However, the procedure has a low occurrence rate, therefore physicians are often poorly prepared. Current teaching methods include expensive simulators and anatomically inaccurate animal models. The goal of this study was to design, produce and test, a low-cost, high-fidelity model for the teaching of CST. DESIGN, SETTING AND PARTICIPANTS: The model was produced from inexpensive, commercially available materials as well as ADAMgel; a custom, recyclable, inexpensive tissue analogue. The model was tested across 19 physicians, mostly consultants and senior registrars in emergency medicine, anaesthesia and surgery. Participants completed comparative questionnaires before and after testing the model. The questionnaires were adapted from previous anaesthetic-based simulation studies and used a modified Likert scale to assess prior knowledge, anatomical realism and the teaching benefits of the model. RESULTS: Participants had varied prior knowledge and experience before testing the model. Results showed that 89.47% (n = 17) of trainees felt the model was a reasonable substitute for practice and 100% (n = 19) agreed that the model was a good training aid for inexperienced trainees and would recommend it to others. CONCLUSIONS: The model proved a successful teaching tool, improving physicians' knowledge and confidence with performing CST. This high fidelity, low cost model demonstrated that a high standard simulation teaching tool can be made which improves teaching of CST.

Is simulation useful in preparing doctors-to-be for patient death: A narrative review.

Clinical and communication skills involved in managing patient death are essential for medical practitioners, yet these skills are often neglected in undergraduate medical education. We aim to review current reported evidence of simulation-based education on medical students' preparedness and performance toward patient death. A narrative review of the literature on simulation-based education for medical students on patient death was conducted. Data on study design, simulation dimension, evaluation tool, and outcome were collected and summarized. Eleven prospective studies were included for narrative review. Simulation modalities included mannequins, standardized patients, and online virtual reality. Heterogeneity in the evaluation tool of simulation-based education was demonstrated. Ninety percent of studies concluded positive outcome of simulation on improving medical students' preparedness in patient death. No negative or adverse learner reaction was reported. Simulation-based education may safely improve medical students' competence in handling patient death. Current data and evaluation tools of education outcomes are sparse and heterogeneous. Future research is encouraged to explore this under-researched topic, amid increasing interest in the use of simulation in medical education.

Making the most of a Morbidity and Mortality meeting.

BACKGROUND: Morbidity and Mortality meetings (M&Ms) are a fundamental element of surgical practice. However, there has been little investigation into best practices, to maximise education and improvement outcomes. OBJECTIVE: Create a new, evidence-based M&M methodology, that facilitates standardised analysis of errors in a non-judgemental fashion, and highlights areas for improvement. METHODS: A Quality Improvement (QI) methodology was used. This project encompassed a literature review and two sequential QI cycles. A literature review and initial survey highlighted best practice and identified areas for improvement. From this information, a new standardised format was created, which centred around a new modified Fishbone framework, incorporating the London Protocol methodology. The project then sequentially tested new formats, with feedback collected for every new format. RESULTS: The literature review and surveys guided improvement of the M&M. The need for standardisation was highlighted. The new PowerPoint template and modified Fishbone ensured presentations and analysis were consistent and systematic. Participants reported that M&Ms were more engaging, interactive and structured, ensuring improved discussion of errors. The modified Fishbone framework reinforced a blame-free, system-focused analysis. CONCLUSION: M&Ms are a critical aspect of patient safety. This project utilised simple QI tools to encourage collaborative reflection, learning and improvement.

Traumatic damage to the liver capsule: an unusual cause of small bowel obstruction.

A 61-year-old man presented to the emergency department with severe abdominal pain. Three months prior to presentation, he had sustained blunt trauma to his right side while cycling, but had not sought medical attention. On admission, a CT scan showed small bowel obstruction (SBO) and he underwent an emergency open laparotomy. Intraoperatively, a subcapsular liver haematoma was identified, with incarcerated, necrotic small bowel within the liver capsule. The patient underwent deroofing of the haematoma with an omental patch and a small bowel resection with primary anastomosis. We believe this is the first reported case of SBO secondary to small bowel herniation into the liver capsule following trauma.

A phantom pig abdomen as an alternative for testing robotic surgical systems: our experience.

The use of animals for testing and validating new medical devices and surgical techniques has raised ethical issues for a long time. Following the introduction of the Three Rs principle, significant efforts have been made to achieve a reduction in the numbers of animals used in testing. Nevertheless, the number of large animals used for testing purposes is still too high. This article describes a potential alternative to the use of large animals in the early phase of the development of surgical equipment -- a high-definition phantom pig abdomen. The phantom pig abdomen was developed from computed tomography scans by using affordable materials, and it was used with two different robotic platforms. It permitted the testing of minimally-invasive robotic pancreatic enucleation, with or without intraoperative ultrasound guidance. The phantom pig abdomen has proven to be a realistic tool, with the potential to reduce the cost and time-frame of the experiments.

Diagnostic laparoscopy through deep inguinal ring: a literature-based review on the forgotten approach to visualize the abdominal cavity during emergency and elective groin hernia repair.

OBJECTIVE: To systematically review the published literature on the role of diagnostic laparoscopy through deep inguinal ring (DL-DR) during groin hernia repair. METHODS: Standard electronic databases were searched reporting article in any language on the role of DL-DR during groin hernia repair regardless of the age and sex of patients. RESULTS: Thirty-one articles on 5745 patients undergoing DL-DR during groin hernia repair were retrieved from the electronic databases. There was 1 randomized, controlled trial, 7 case reports and 2 case series on 58 adult patients mainly targeting assessment of bowel viability following spontaneous reduction of the strangulated groin hernia. Twenty-one articles, either retrospective or prospective case series on 5687 were reported on pediatric patients aiming to detect a contralateral patent processus vaginalis or synchronous groin hernia. Overall, the laparoscopy group had a reduced operative time, reduced length of hospital stay, lower complication rate, and earlier return to normal activity. DL-DR success rates were reported in >95% of patients. Contralateral patent processus vaginalis indicative of inguinal hernia was found in >48% of children. There was no major morbidity reported in any group. CONCLUSIONS: DL-DR during groin hernia repair may be performed safely when indicated. The routine use of DL-DR is an established practice in pediatric surgery. There is still insufficient evidence to recommend the routine use of DL-DR in adults.

Colonic rupture in a patient on combination chemotherapy for metastasized carcinoma of the esophagogastric junction. Case report and review of the literature.

BACKGROUND: Cecal perforation due to neutropenic colitis is a known and described side effect of many chemotherapy regimens. We present a case of a patient with gastric adenocarcinoma who developed spontaneous cecal perforation during chemotherapy without the classic pattern of typhlitis. CASE REPORT: A 58-year-old woman was on chemotherapy for an adenocarcinoma of the gastric junction, when she developed a cecal perforation. There was neither evidence for leucopenia nor for typhlitis. Laparotomy was performed and cecostomy was established using the perforated bowel. Postoperative course was uneventful. The patient died from tumor progression 8 months after the diagnosis was made. CONCLUSION: There is no evidence for a connection between this event and chemotherapy treatment but neither can it be excluded. Even if unusual, colon toxicity could be a potential life-threatening complication associated with more drugs than usually thought.

[Current trends of artificial enteral nutrition in acute pancreatitis]. / Attuali indirizzi di nutrizione artificiale enterale nella pancreatite acuta.

During recent years, there has been considerable debate as to the nutritional supply that needs to be established for a patient with acute pancreatitis. The main problem is still infection of the pancreatic necrosis, which has a decisive bearing on the indication for surgery and is the main cause of mortality. Infection stems from bacterial translocation from the patient's gut. Enteral nutrition with its known potential for reducing this type of infection constitutes an attempt to prevent it by preserving the enteric mucosal barrier. Today, the concept of pancreatic rest is no longer considered mandatory in the guidelines of many Surgical and Nutritional Societies, whilst enteral nutrition is the gold standard for acute pancreatitis. Assuring an integrated parenteral and enteral supply before reaching the full regimen of enteral nutrition is the most reliable policy during the early days of the disease. Moreover, outcomes being equal, enteral nutrition is cheaper than parenteral nutrition, as has been extensively demonstrated in many clinical trials in severe acute pancreatitis.

[Influence of enteral nutrition on cytokine response in resective liver surgery]. / Influenza della nutrizione enterale sulla risposta citochinica in chirurgia resettiva epatica.

Postoperative infectious complications are nowadays a major problem in liver surgery. Better surgical outcomes with a consequent reduction in treatment and hospitalisation costs are a primary objective. The aim of this prospective, randomised study was to evaluate the cytokine response during and after portal clamping in patients undergoing liver resection and continuously fed with enteral nutrition as compared to patients receiving parenteral nutritional support. Forty patients with liver tumours were divided into two groups of 20 on the basis of the presence or absence of chronic liver disease. Furthermore, the latter group of 20 were randomised to two subgroups A and B of 10 patients on the basis of the different perioperative nutrition modalities. Group A patients were fed by so-called uninterrupted enteral nutrition, which means without interruption from the day before surgery with a nutritional solution delivered via a nasojejunal tube. The patients in group B were submitted to hepatic resection with parenteral nutritional support. Liver resection had to consist in resection of at least 30% of the parenchyma in non-cirrhotic patients or in segmental resection in cirrhotic ones. Ten milliliter blood samples were harvested before operation, and 10, 30 and 60 min after declamping and at 24 h. Interleukin 6 and a-tumour necrosis factor values were detected in blood samples. The values of C reactive protein and of prealbumin were recorded at 72 h postoperatively. We also evaluated postoperative complications, resumption of bowel movements, oral intake of nourishment, and patient discharge. Values in blood samples in the two groups showed a statistically significant difference in interleukin 6 values only after 24 h (10 min: group A 121 +/- 25.3, group B 156 +/- 31.4; after 24 h: group A 31.5 +/- 12, group B 105.1 +/- 24.1), while the a-tumour necrosis factor assay showed no significant difference between the two groups. However, there was an appreciably longer hospital stay (group A 10.9 +/- 3.1 days (range: 7-21 days), group B 13.2 +/- 2.7 days (range: 8-19 days) (P < 0.02) and a quicker resumption of bowel movements in group A. The data available show that uninterrupted enteral nutrition produces a modulation of the cytokine response following portal clamping. A lower cytokine activation cascade reduces the impact of the action of cytokines on the hepatic parenchyma with consequent enhancement of the hepatic Kupffer cell component. These factors thus substantially reduce the length of the patient's hospital stay and consequently the cost of medical care.