Endoscopy Services in Gandhinagar & Ahmedabad | Niraaya Hospital

What is colonoscopy?

Colonoscopy is the direct endoscopic examination of the entire large intestine (colon) - from the rectum and sigmoid to the splenic flexure, transverse colon, hepatic flexure, ascending colon, caecum, and terminal ileum (the last segment of the small intestine, which can be intubated through the ileocaecal valve). A long (160 cm), flexible video colonoscope is introduced through the anus and advanced progressively through the entire colon under direct vision.

Colonoscopy is simultaneously the most accurate diagnostic tool for colonic disease and the only screening test that both detects and removes colorectal polyps (preventing their progression to cancer) in a single procedure - making it unique in cancer prevention.

Indications - when is colonoscopy needed?

• Rectal bleeding or blood mixed in stool (haematochezia) - in any patient over 40, colonoscopy is essential to exclude colorectal cancer
• Change in bowel habits (diarrhoea, constipation, alternating) persisting more than 3-4 weeks
• Unexplained iron-deficiency anaemia (occult right-sided colon bleeding)
• Positive faecal occult blood test (FOBT) or faecal immunochemical test (FIT)
• Colorectal cancer screening - from age 45-50 in average-risk patients; earlier in high-risk patients
• Surveillance after colorectal polyp removal (timing based on number, size, and histology of previous polyps)
• Surveillance after colorectal cancer surgery
• Evaluation of inflammatory bowel disease (Crohn's colitis, ulcerative colitis) - extent, activity, biopsy, and dysplasia surveillance

What is ERCP?

ERCP is a specialised combined endoscopic and fluoroscopic (X-ray) procedure used to diagnose and treat diseases of the bile ducts, gallbladder, and pancreatic duct. It is one of the most technically demanding procedures in therapeutic endoscopy - requiring dedicated training, specialised equipment (a side-viewing duodenoscope, fluoroscopy unit, and a full range of biliary therapeutic accessories), and a team with expertise in managing its specific complications.

How ERCP works:

A side-viewing duodenoscope (an endoscope with the camera on the side rather than at the tip) is introduced through the mouth into the duodenum. The ampulla of Vater - the small opening in the duodenal wall where both the common bile duct (CBD) and the pancreatic duct drain into the duodenum - is identified. A thin cannula or sphincterotome (a cutting wire) is introduced into the CBD opening (cannulation), and contrast dye is injected under fluoroscopic guidance - outlining the bile duct system on X-ray (cholangiogram) and identifying stones, strictures, or leaks.

Therapeutic ERCP applications:

Bile Duct Stone Removal (Choledocholithiasis):

The most common indication for therapeutic ERCP. After successful biliary cannulation, a sphincterotomy is performed - the sphincter of Oddi (the muscular valve at the lower end of the CBD) is cut with a cutting wire, widening the CBD opening. Stones are then extracted into the duodenum using a balloon catheter (sweeping stones out) or a Dormia basket (directly grasping stones). For very large stones, mechanical lithotripsy (crushing the stone within a wire basket) or electrohydraulic lithotripsy (shock-wave fragmentation) may be needed first. After successful ERCP clearance of CBD stones, laparoscopic cholecystectomy is performed to remove the gallbladder.

Bile Duct Stenting:

For malignant biliary obstruction (from pancreatic head cancer, cholangiocarcinoma, or lymph node compression) - a self-expanding metal stent (SEMS) or plastic stent is placed across the stricture, re-establishing bile flow into the duodenum and relieving jaundice. This is performed as palliation in inoperable cancer, or as a pre-operative bridge before planned surgery.

For bile duct strictures from chronic pancreatitis, post-surgical injury, or primary sclerosing cholangitis - endoscopic balloon dilation and stenting can temporarily relieve obstruction, with surgical repair (hepaticojejunostomy) considered for definitive management.

Post-cholecystectomy bile leak: When a clip slips or a small bile duct accessory branch is inadvertently divided during cholecystectomy, bile leaks into the abdominal cavity causing pain and fever. ERCP with sphincterotomy and placement of a biliary stent across the site of the leak allows the majority to heal without surgical re-intervention.

Pancreatic duct interventions: Drainage of pancreatic duct strictures and stones in chronic pancreatitis, stenting across pancreatic leaks.

Complications of ERCP:

ERCP is an effective but not risk-free procedure. The most important complication is post-ERCP pancreatitis (PEP) - occurring in approximately 3-5% of procedures (higher in certain risk groups). Other complications include bleeding after sphincterotomy (1-2%), cholangitis (0.5-1%), and perforation (less than 0.5%). Dr. Patel takes detailed precautions - using rectal NSAIDs (proven to reduce PEP risk), ensuring adequate biliary drainage, and carefully selecting patients where ERCP provides a clear benefit-to-risk ratio.

The critical advantage of having GI endoscopy performed by Dr. Neel Patel - a GI surgeon rather than a physician endoscopist - is the direct integration of endoscopic findings with surgical decision-making. When a suspicious polyp, a mass, a bile duct abnormality, or a bleeding site is identified, Dr. Patel has the full surgical context to interpret it accurately and act on it appropriately - whether that means tissue biopsy and endoscopic resection, scheduling laparoscopic surgery, or coordinating with other specialists. This integration of diagnostic endoscopy and surgical expertise in one physician provides a seamless, comprehensive GI care experience at Niraaya Hospital, Kudasan, Gandhinagar.