Learning curve, diagnostic yield and safety of single balloon enteroscopy.

Background: Single balloon enteroscopy (SBE) is a recently developed diagnostic modality to assess small bowel mucosa. The data on learning curve of SBE is scanty. We aimed to assess the learning curve, diagnostic yield and safety of SBE Methods: All patients who underwent SBE at our centre from December 2007 to December 2010 were included retrospectively. The clinical details, enteroscopy findings and procedure related details were obtained for each patient from a prospectively maintained database. The extent of small bowel visualised with increasing number of procedures by a single endoscopist (Endoscopist A) who performed most of the procedures was used to estimate the learning curve using locally weighted regression curve. The diagnostic yield and complications rates of SBE were also estimated. The study was approved by the institute review board and ethics committee. Results: Ninety SBEs were performed in 84 patients (age: 42+15 years, 27.4% females). 57 procedures were performed (32 antegrade and 25 retrograde) by endoscopist A. There was gradual improvement in the extent of small bowel visualised during the first 15 procedures via antegrade route followed by flattening of curve. The retrograde route showed no definite trend towards improvement during the procedures performed. The overall diagnostic yield of SBE was 32.1%. There was no complication except for mild self-limiting abdominal pain in one patient. Conclusions: SBE via antegrade route has a higher success rate and better learning curve than the retrograde route. SBE is a safe procedure and helps in establishing a diagnosis in one-third of the patients examined.

Microbial profile and antibiotic sensitivity pattern in acute bacterial cholangitis.

Introduction The changing antimicrobial sensitivity pattern of causative organisms poses a therapeutic challenge in treating patients with acute cholangitis. We therefore evaluated the microbial profile and sensitivity pattern to antibiotics in patients with acute bacterial cholangitis. Methods Data of patients above 18 years of age with acute bacterial cholangitis seen between January 2004 and March 2007 were retrospectively analyzed. The study was continued prospectively from April 2007 to December 2008. Data on clinical features, etiological and microbial profile and therapy, and patient outcomes were analyzed. In the prospective group, the antibiotic susceptibility patterns of organisms grown on bile and blood culture were also obtained. Results One hundred and eighty-five patients with acute cholangitis were studied. Choledocholithiasis (62.7%) and malignancy (29.2%) were the main predisposing factors. Bile culture was positive in 88 of 95 patients, and blood culture was positive in 47 of 178 (26.4%) patients. Bile cultures were predominantly polymicrobial (69.5%) in contrast to blood cultures (2.2%). E. coli was the predominant isolate in blood and bile. No growth was seen on anaerobic bile or blood cultures. The prospective group showed high resistance of E. coli to third generation cephalosporins and ciprofloxacin. Conclusions Changing antimicrobial sensitivity patterns requires a revision of empiric antibiotic therapy policy in cholangitis.

Distinguishing Crohn’s disease from intestinal tuberculosis – a prospective study.

Background: Distinguishing Crohn’s disease (CD) from intestinal tuberculosis (ITB) is clinically challenging but important for prognostication and patient management. Methods: Patients with diagnosis of CD and ITB were prospectively enrolled in the study from January 2006 to October 2007. The patients were followed up for further 15 months to ascertain that the diagnosis had not changed. Clinical, laboratory, serological [IgG anti Saccharomyces cerevisiae antibody (ASCA)], endoscopic and histologic features were compared between the ITB and CD patients. The ASCA titers were estimated in 100 healthy controls. Patients were diagnosed as ASCA positive when their ASCA titers were three standard deviations above mean of controls. Results: Thirty patients with CD (age 33.9 + 15.2 years, 70% males) and thirty with ITB (age 35.1 + 12.2years, 53.3% males) were included in the study. Features commoner in CD were longer duration of symptoms (p<0.001), blood mixed stool (p=0.006), presence of longitudinal ulcers (p=0.005) and skip lesions (p=0.008) on colonoscopy and more number of colonic segments involved (p=0.004). Anorexia was commoner in ITB patients (p=0.008). Positive ASCA was commoner in CD (30%) than ITB (10%) but did not reach statistical significance (p=0.1). Conclusions: A combined evaluation of clinical features, endoscopy, histology and response to treatment is the key to differentiate between CD and ITB.

Molecular adsorbent and re-circulating system.

The molecular adsorbent recirculating system (MARS) is a non-biological artificial liver support system. Used for almost a decade, there are only two randomized controlled trials on the efficacy of MARS till date. A number of uncontrolled studies have documented a marked improvement in the biochemical parameters of patients after MARS. Although MARS seems to be an effective and promising tool in the management of liver failure, its cost needs to be reduced to enable it use in a member of indications.