Laparoscopic Gastrointestinal Surgery During COVID-19 Pandemic: Single-Center Experience

The influence of prolonged instrument manipulation on gas leakage through trocars

BACKGROUND

During laparoscopic surgery, CO2 insufflation gas could leak from the intra-abdominal cavity into the operating theater. Medical staff could therefore be exposed to hazardous substances present in leaked gas. Although previous studies have shown that leakage through trocars is a contributing factor, trocar performance over longer periods remains unclear. This study investigates the influence of prolonged instrument manipulation on gas leakage through trocars.

METHODS

Twenty-five trocars with diameters ranging from 10 to 15 mm were included in the study. An experimental model was developed to facilitate instrument manipulation in a trocar under loading. The trocar was mounted to a custom airtight container insufflated with CO2 to a pressure of 15 mmHg, similar to clinical practice. A linear stage was used for prolonged instrument manipulation. At the same time, a fixed load was applied radially to the trocar cannula to mimic the reaction force of the abdominal wall. Gas leakage was measured before, after, and during instrument manipulation.

RESULTS

After instrument manipulation, leakage rates per trocar varied between 0.0 and 5.58 L/min. No large differences were found between leakage rates before and after prolonged manipulation in static and dynamic measurements. However, the prolonged instrument manipulation did cause visible damage to two trocars and revealed unintended leakage pathways in others that can be related to production flaws.

CONCLUSION

Prolonged instrument manipulation did not increase gas leakage rates through trocars, despite damage to some individual trocars. Nevertheless, gas leakage through trocars occurs and is caused by different trocar-specific mechanisms and design issues.

Surgical treatment of acute cholecystitis in patients with confirmed COVID-19: Ten case reports and review of literature

BACKGROUND

Research concerning postoperative outcomes of confirmed coronavirus disease 2019 (COVID-19) patients revealed unfavorable postoperative results with increased morbidity, pulmonary complications and mortality. Case reports have suggested that COVID-19 is associated with more aggressive presentation of acute cholecystitis. The aim of the present study is to describe the perioperative assessment and postoperative outcomes of ten patients with confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with concomitant acute cholecystitis who underwent cholecystectomy.

CASE SUMMARY

We report a total of 10 SARS-CoV-2 positive patients with concomitant acute cholecystitis that underwent cholecystectomy. Six patients were males, the mean age was 47.1 years. Nine patients had moderate acute cholecystitis, and one patient had severe acute cholecystitis. All patients were treated with urgent/early laparoscopic cholecystectomy. Regarding the Parkland grading scale, two patients received a Parkland grade of 3, two patients received a Parkland grade of 4, and six patients received a Parkland grade of 5. Eight patients required a bail-out procedure. Four patients developed biliary leakage and required endoscopic retrograde cholangiopancreatography with biliary sphincterotomy. After surgery, five patients developed acute respiratory distress syndrome (ARDS) and required intensive care unit (ICU) admission. One patient died after cholecystectomy due to ARDS complications. The mean total length of stay (LOS) was 18.2 d. The histopathology demonstrated transmural necrosis (n = 5), vessel obliteration with ischemia (n = 3), perforation (n = 3), and acute peritonitis (n = 10).

CONCLUSION

COVID-19 patients with acute cholecystitis had difficult cholecystectomies, high rates of ICU admission, and a prolonged LOS.