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  • Author: Todor I. Ivanov x
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Laparoscopic Resection of the Pancreatic Tail with Preservation of the Spleen in a Patient with a Large Pseudopapillary Tumor of the Pancreas

ABSTRACT

Laparoscopic resections of the pancreas have gained in popularity in the last few years. Those preserving the integrity of the spleen are performed very rarely and are a challenge for every surgeon. We hereby report a case of laparoscopic resection of the pancreatic tail with preservation of the spleen and the integrity and the blood supply to the spleen in a 26 year-old patient with a large pseudopapillary tumor of the pancreas. Postoperative recovery was quick and without complications. The functional and aesthetic result was satisfactory. Laparoscopic resection of the pancreas is a safe and effective therapeutic procedure in selected patients

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Laparoscopic exploration of bile ducts in patients with calculosis. indications, methods and first results

ABSTRACT

INTRODUCTION: In the last few years there has been a resurgence of laparoscopic exploration of the common bile duct as an alternative to endoscopic retrograde cholangiopancreatography (ERCP), the primary method for diagnosis and treatment of biliary tract calculosis. AIM: The aim of this study was to clarify the indications and methods for performing laparoscopic bile duct exploration, based on our experience in the field and data from the literature.

PATIENTS AND METHODS: We recruited 12 patients who underwent laparoscopic exploration and stone extraction from the common bile duct (CBD) in the surgical ward of Kaspela Hospital, Plovdiv over the period January 2011 to January 2012. The diagnostic and therapeutic modalities used in the study included laboratory tests, ultrasound study, CT, ERCP, digital cholangiography, clamp and balloon stone extraction, primary suture and choledochoduodenostomy.

RESULTS: Stone extraction was successfully performed in 8 patients using the transcystic approach through an incision used in the cholangiography. The procedure failed in the remaining four patients and we used here 2-cm longitudinal choledochotomy. In two patients the control cholangiography following the extraction of stones demonstrated complete clearance of the biliary tree and free passage of contrast agent from bile duct to duodenum (patent ampulla of Vater). In these two patients we performed a primary closure of the choledochotomy with a single interrupted suture (“ideal choledochotomy”). In two patients from the choledochotomy group, the control cholangiography showed the presence of residual stones or fragments trapped above the sphincter of Oddi with no contrast medium in the duodenum. In these cases we completed this procedure with latero-lateral choledochoduodenostomy by Flërken. All patients had a smooth postoperative course with no recorded complications. The average hospital stay was 5 days.

CONCLUSIONS: Laparoscopic exploration of the biliary ducts in calculosis is an efficient, safe and reliable method to manage this serious complication of gall-stone disease in the hands of an experienced laparoscopic surgeon. The results of its application are comparable and in some cases even better than those of ERCP used as a therapeutic procedure as regards clearance of the CBD and the complications involved in these two procedures.

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Multiplex PCR Assay for Identifi cation and Differentiation of Campylobacter jejuni and Campylobacter coli Isolates

Abstract

Introduction: Campylobacter spp. are important causative agents of gastrointestinal infections in humans. The most frequently isolated strains of this bacterial genus are Campylobacter jejuni and Campylobacter coli. To date, genetic methods for bacterial identification have not been used in Bulgaria. We optimized the multiplex PSR assay to identify Campylobacter spp. and differentiate C. jejuni from C. coli in clinical isolates. We also compared this method with the routinely used biochemical methods.

Aim: To identify Campylobacter spp. and discriminate C. coli from C. jejuni in clinical isolates using multiplex PCR assay.

Materials and methods: Between February 2014 and January 2015 we studied 93 stool samples taken from patients with diarrheal syndrome and identified 40 species of Campylobacter spp. in them. The clinical material was cultured in microaerophilic atmosphere, the isolated strains being biochemically diff erentiated (hydrolysis of sodium hippurate for C. jejuni, and hydrolysis of indoxyl acetate for C. coli). DNA was isolated from the strains using QiaAmp MiniKit (QIAGEN, Germany). Twenty strains were tested with multiplex PCR for the presence of these genes: cadF, characteristic for Campylobacter spp., hipO for C. jejuni and asp for C. coli.

Results and discussion: The biochemical tests identified 16 strains of C. jejuni, 3 strains of C. coli, and 1 strain of C. upsaliensis. After the multiplex PCR assay the capillary gel electrophoresis confirmed 16 strains of C. jejuni, 2 strains of C. coli and 2 strains of Campylobacter spp. - because of the presence of the gene cadF. C. jejuni has the gene hipO, and it is possible that this gene may not be expressed in the biochemical differentiation yielding a negative reaction as a result. In comparison, we can conclude that the genetic differentiation is a more accurate method than the biochemical tests.

Conclusion: The multiplex PCR assay is a fast, accurate method for identifi cation of Campylobacter spp. which makes it quite necessary in the clinical diagnostic practice.

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Carbapenemase Production of Clinical Isolates Acinetobacter baumannii and Pseudomonas aeruginosa from a Bulgarian University Hospital

Abstract

Background: Production of Bla OXA-23, OXA-24, OXA-58 and hyperexpression of OXA-51 due to ISAba1 insertion sequence are the leading causes of carbapenem resistance in Acinetobacter baumannii. The loss of OprD transmembrane protein and the overexpression of some effl ux pumps are considered to be the main factors for carbapenem resistance in Pseudomonas aeruginosa whereas metallo-enzymes’ production has a secondary role. Aim: Тo examine the carbapenem resistance due to carbapenemase production among clinically signifi cant Gram-negative non-fermenters from St George University hospital, Plovdiv: A. baumannii and P. aeruginosa. Materials and methods: Forty three A. baumannii and 43 P. aeruginosa isolates, resistant or with intermediate resistance to imipenem and/or meropenem were included in the study. They were collected from patients admitted in 14 various hospital wards between 2010 and 2014. Both phenotypic and genetic methods were used for identifi cation and antimicrobial susceptibility testing. Results: All A. baumannii demonstrated carbapenemase production determined by a modifi ed Hodge test whereas P. aeruginosa isolates did not show this phenomenon. OXA-23 genes were determined in 97.7% (42 out of 43) of A. baumannii isolates indistinguishable from the sequence of the classical ARI-1 gene. OXA-24, OXA-58 and overexpression of OXA-51 were not registered in any of the isolates. All P. aeruginosa were negative for blaVIM and blaIMP genes. Conclusion: The leading cause of carbapenem resistance in A. baumannii isolates from our hospital is the carbapenemase production due to the expression of OXA- 23 gene, whereas in P. aeruginosa - the loss of transmembrane OprD protein and the effl ux pumps’ hyperexpression are suspected to be the main mechanisms.

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