Stoma Care
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Direct answer
Creating a stoma takes twenty minutes; managing it well takes the rest of the patient's life. An ileostomy is brought out spouted 2-2.5 cm in the right iliac fossa — the spout keeps enzyme-rich liquid effluent off the skin — whereas a colostomy sits flush in the left iliac fossa and discharges formed stool, and an ileal conduit is again spouted, on the right. Siting is done before surgery with the patient standing, sitting and lying, through the rectus muscle and away from scars, bony points, skin folds and the belt line. Early complications are retraction, mucocutaneous separation, stomal necrosis and high output; the commonest late problem is a parastomal hernia, followed by prolapse, stenosis and chemical dermatitis.
What you must remember
- Why spout or flush: ileal effluent (500-800 mL/day, rich in proteases) digests peristomal skin, so the ileostomy spills over a 2-2.5 cm spout; colonic effluent is formed and harmless to skin, so the colostomy lies flush.
- Siting rules: through the rectus muscle (which lowers parastomal hernia risk), on the summit of the abdominal fat bulge, clear of the umbilicus, waistline, old scars, iliac crest and costal margin — marked before surgery with the patient standing, sitting and lying, and the patient must be able to see and reach it.
- High-output stoma: above roughly 1.5 L/day — rehydration with salt-containing fluids, loperamide taken 30-60 minutes before meals, codeine, a proton pump inhibitor to cut gastric secretion, and a search for partial obstruction; monitor potassium, magnesium and renal function.
- Early complications: mucocutaneous separation, retraction, necrosis in the first 72 hours (a torch-and-test-tube check of mucosal colour — dusky then black means re-operation), and the dehydrating high output of a newly fashioned ileostomy.
- Late complications: parastomal hernia (the commonest — repair only if symptomatic, by relocation or mesh), prolapse, stenosis (dilate, then revise), and peristomal varices in cirrhotics, which bleed like any portosystemic varix.
- Diet and appliances: ileostomy patients need extra salt and thorough chewing, avoiding pips, skins, sweetcorn and coconut that can occlude the outlet; base plates are changed every three to five days and pouches emptied at one-third full.
- Defunctioning stomas: a loop ileostomy protects a low colorectal anastomosis and is closed at 8-12 weeks after a contrast enema or endoscopic check; Hartmann's end colostomy with a rectal stump may be reversed later or left for good.
Planning the stoma before the knife
The operation begins in the outpatient room. The stoma therapist meets the patient, explains life with an appliance, and marks the site over the rectus sheath — tested standing, sitting and bending, because a stoma hidden in a fold leaks within days. In theatre the trephine is made through the rectus, the bowel brought out without tension, and the mesentery preserved — the spout is fashioned to 2-2.5 cm for the ileum.
The first week is the danger window. Output is measured hourly in the diary: an ileostomy doing 1.5 litres by day four is a high-output stoma, and the ladder starts — salt-rich fluids, loperamide before meals, omeprazole, magnesium checked. The mucosa is inspected before discharge: pink and glistening means viable. Teaching runs parallel: emptying technique, base-plate cutting to the stoma's exact diameter, and a contact number. The emergencies that readmit these patients are dehydration with acute kidney injury — the young ileostomist with gastroenteritis — and obstruction from a food bolus, presenting with cramping and a swollen, silent stoma.
Where students slip
The directly asked viva question — "why is an ileostomy spouted but a colostomy flush?" — is missed by anyone who never linked effluent to skin: enzymes, not surgical fashion. The second slip is placing stomas on the wrong side: ileostomy and ileal conduit right, colostomy left, transverse loop colostomy in the upper abdomen. The third is forgetting the hernia: an elderly patient with a bulge beside a functioning colostomy has a parastomal hernia until proven otherwise, and the exam answer for first management is an appliance review and belt, not immediate surgery. The cirrhotic with bleeding peristomal skin has varices — a hepatology problem wearing a stoma bag.
Frequently asked questions
Why is an ileostomy fashioned with a spout?
The 2-2.5 cm spout diverts enzyme-rich liquid effluent into the appliance instead of pooling on peristomal skin, preventing chemical excoriation.
What is the commonest late complication of a stoma?
Parastomal hernia — managed conservatively with support belts unless symptomatic or irreducible, then treated by repair or relocation.
How is a high-output stoma managed?
Oral rehydration with salted fluids, loperamide before meals, codeine, a proton pump inhibitor, electrolyte monitoring, and treatment of any partial obstruction.
What are the principles of stoma siting?
Over the rectus muscle, on a flat visible area away from scars, folds, bones and the belt line, marked preoperatively with the patient in multiple positions.
When is a defunctioning loop ileostomy closed?
Around 8-12 weeks after the protected anastomosis has been shown to be intact by contrast study or endoscopy, once nutrition and inflammation have recovered.