Residual contamination and bioburden after reprocessing of single-use endoscopic ultrasound needles: An ex vivo study.

BACKGROUND AND AIM: Endoscopic ultrasound (EUS) aspiration needles are single-use devices. However, in many centers, because of cost-constraints, these devices are reused multiple times. We studied microbiological contamination and bioburden on reprocessed needles to evaluate whether these devices can be successfully sterilized. METHODS: We studied 10 EUS needles each of 19 G, 22 G, and 25 G in size, and five 22-G ProCore needles. After initial use, each needle was reprocessed by a standardized protocol. We used standard microbiological cultures, as well as ATP bioluminescence technique to quantify bioburden as relative light units (RLU). We defined significant soil contamination by RLU values >200. We also used extractant fluid to disrupt cell membranes in an attempt to enhance ATP detection. RESULTS: We found culture positivity in 3/34 (8.8%), and detectable bioburden on the exposed surface of 33/35 (94.3%), and inside lumen of 29 (82.9%) reprocessed FNA needles. Significant bioburden was found in three (8.6%) and two (5.7%) needles on the surface and lumen, respectively. We found that use of extractant fluid enhanced detection of bioburden. Larger (19 G) needles had higher surface contamination (P = 0.016), but there was no relation of luminal contamination with needle diameter (P = 0.138). Sheath design and presence of side bevel did not influence extent of contamination. There was significant correlation between the surface and intraluminal bioburden (P < 0.001). CONCLUSIONS: There is significant bioburden in reprocessed EUS needles; standard microbiological cultures have low sensitivity for detection of needle contamination. We have provided objective evidence for the futility of reprocessing attempts, and practice of EUS needle reuse should be discontinued.

Dengue Virus Transmission from Living Donor to Recipient in Liver Transplantation: A Case Report.

Many infections are transmitted from a donor to a recipient through organ transplantations. The transmission of dengue virus from a donor to a recipient in liver transplantation is a rare entity, and currently, there is no recommendation for screening this virus prior to transplantation. We report a case of transmission of dengue virus from donor to recipient after liver transplantation. The recipient had a history of multiple admissions for hepatic encephalopathy and ascites. He was admitted in the ICU for 15 days for chronic liver disease, ascites, and acute kidney injury before transplantation. The donor was admitted 1 day before transplantation. The donor spiked fever on postoperative day 2 followed by thrombocytopenia and elevated liver enzymes. The donor blood test was positive for dengue NS1 antigen. The recipient also had a similar clinical picture on postoperative day 5 and his blood test was also positive for dengue NS1 antigen. Hence, the diagnosis for posttransplant donor-derived allograft-related transmission of dengue infection was made. Both recipient and donor were treated with supportive measures and discharged after their full recovery on postoperative days 9 and 18, respectively. The effect of immunosuppression on dengue presentation is still unclear and there is lack of literature available. In our case, the recipient developed dengue fever similar to general population without showing any feature of severe graft dysfunction. We have concluded that dengue virus can also be transmitted from donor to recipient, and immunosuppression did not have any adverse effect on the evolution of dengue fever within the recipient. Delhi being a hyperendemic zone, screening for donors (especially in season time) for dengue virus seems to be the best preventive method to control donor-derived transmission of dengue to recipient.

Post-transplant biliary complications: an analysis from a predominantly living donor liver transplant center.

BACKGROUND AND AIM: Biliary anastomosis is the Achilles' heel of liver transplant. The reported incidence of biliary complications is 5-15% after deceased donor liver transplantation, and 20-34% after right-lobe live donor liver transplantation (LDLT). We report our experience from an LDLT program. METHODS: Between September 2006 and August 2010, 338 liver transplants were performed. Biliary reconstructions were done with an end-to-end choledochocholedochostomy in 307 cases. All recipients were monitored for any evidence of bile leak or stricture. RESULTS: Of 338 transplants performed during this time period, 65 patients had biliary complications (19%). Of these, 30 were biliary leaks, and 35 patients had biliary stricture. Four were cut surface leaks, which settled without any intervention. One patient had leak from primary hepaticojejunostomy, which settled on conservative management. Twenty-five patients had anastomotic leaks, of which 17 underwent endoscopic retrograde cholangiopancreatography and stenting; another eight underwent re-exploration and hepaticojejunostomy. Forty-five patients had biliary strictures. Of these, 10 patients had bile leak initially, followed by biliary stricture. Patients with a double duct anastomosis had a significantly higher risk of developing biliary complications compared with those with a single duct anastomosis. There was no statistically significant difference in survival between those with or without biliary complications. CONCLUSIONS: Biliary complications are common after LDLT. Most leaks will subsequently form strictures. Endoscopic retrograde cholangiopancreatography is the first-line treatment for biliary complications, with surgery required in a minority of cases. The incidence of biliary complications is higher in multiple duct anastomoses. Biliary complications are not associated with increased mortality.