Colostomy reversal succeeds in roughly 46% to 50% of patients who had the original surgery, though “success” here includes an important nuance: many patients never attempt reversal at all due to age, health conditions, or personal choice. Among those who do go through with the procedure, the surgery itself has a high technical success rate, with fewer than 1% of attempted reversals failing and requiring a permanent stoma. The real question for most people isn’t whether the surgery works, but whether they’ll be a candidate for it and what recovery looks like afterward.
How Success Rates Are Measured
The numbers around colostomy reversal can be confusing because studies measure “success” differently. In a large UK study of Hartmann’s procedure patients (one of the most common reasons for a colostomy), 47% of surviving patients underwent successful reversal. But 46% never proceeded to reversal at all, often because of other health problems or advanced age rather than surgical failure. Only 1% of patients who attempted reversal ended up with a permanent stoma because the procedure didn’t work.
A separate study of 218 patients found similar numbers: at two years after the original surgery, about 46% had undergone stoma reversal, 19% were alive but still had their stoma, and 35% had died with the stoma in place (typically from the underlying disease, not the stoma itself). So the gap between “reversal rate” and “reversal success rate” is important. The surgery works well when attempted. The bigger barrier is qualifying for it.
Who Gets Reversed and Who Doesn’t
Around 20% of patients with ostomies intended to be temporary never have them reversed or end up converting to a permanent colostomy. The reasons vary. Advanced age is a significant predictor of complications, with each additional year raising risk. Patients with multiple chronic health conditions are roughly twice as likely to develop postoperative complications compared to healthier patients, which makes surgeons more cautious about recommending reversal.
Your surgeon will evaluate several factors before scheduling a reversal: whether the original condition has healed, your overall fitness for another operation, and your nutritional status. Stopping smoking, limiting alcohol, staying physically active, and eating well before surgery all measurably improve recovery and reduce risk.
Complication Rates
Colostomy reversal is not a minor procedure. A large analysis of the national surgical quality database found that 13% of patients experienced a major complication. Earlier literature reports overall complication rates (including minor issues like wound infections) as high as 50%, though more recent data from high-volume centers tends to come in lower, around 21%.
The most serious complication is an anastomotic leak, where the reconnected bowel doesn’t seal properly. In the UK study, three out of 108 reversal patients experienced this. Major complications requiring further intervention occurred in about 4% to 12% of cases depending on the study. Mortality from elective colostomy reversal is low. The national database analysis found a death rate of 0.3% among over 19,000 patients. One study of reversal after emergency Hartmann’s procedures reported zero deaths within 90 days of reversal. Older literature cites mortality as high as 7%, but this likely reflects sicker patient populations and older surgical techniques.
Timing Matters
When you have the reversal significantly affects your outcome. A retrospective analysis found that reversal within 45 to 120 days after the original surgery produced the best results: fewer complications, shorter hospital stays, and lower rates of readmission. Waiting longer than 180 days was linked to notably higher complication rates, longer hospitalizations, and more reinterventions. The tissue around the stoma and inside the abdomen develops more scar tissue over time, making the surgery technically harder.
That said, reversing too early carries its own risks. Your surgeon needs to confirm that the original problem (whether it was diverticulitis, trauma, or cancer treatment) has fully resolved before reconnecting the bowel. The 45-to-120-day window represents a sweet spot where healing is complete but scarring hasn’t become excessive.
Laparoscopic vs. Open Surgery
Colostomy reversal can be done through traditional open surgery or laparoscopically (using small incisions and a camera). Multiple studies have compared the two approaches, and the results generally favor laparoscopy for recovery, though not dramatically.
In one case-controlled study of 88 patients, those who had laparoscopic reversal went home in about 10 days compared to 16 days for open surgery. Another study found a smaller gap: 6 days for laparoscopic versus 7 for open. The laparoscopic approach also tends to involve less blood loss and faster return of bowel function. Operating times and complication rates are similar between the two methods. Not every patient is a candidate for the laparoscopic approach, particularly those with extensive abdominal scarring from prior surgeries.
Bowel Function After Reversal
A successful reversal doesn’t always mean a return to completely normal bowel habits. About one-third of patients experience some degree of bowel dysfunction afterward, a collection of symptoms sometimes called low anterior resection syndrome. This can include urgency (needing to find a bathroom quickly), increased frequency of bowel movements, episodes of incontinence, and unpredictable bowel patterns that affect social life.
In a study measuring these symptoms with standardized questionnaires, roughly 16% of patients reported minor symptoms and 17% reported major symptoms. A quarter of patients scored high enough on functional assessments to indicate meaningful disruption to daily life. These issues often improve over the first year as the reconnected bowel adapts, but some patients deal with lasting changes. Knowing this ahead of time helps set realistic expectations. For many people, the trade-off is still worthwhile compared to living with a stoma, but it’s not a return to how things were before the original surgery.
What Recovery Looks Like
Hospital stays after colostomy reversal typically range from 6 to 16 days depending on the surgical approach and whether complications arise. The first milestone your medical team watches for is the return of bowel function, specifically passing gas, which signals that the reconnected intestine is waking up. You’ll start with clear liquids and gradually advance to solid food.
Full recovery at home takes several weeks. During this time, your bowel movements will be irregular and possibly frequent. Heavy lifting and strenuous activity are restricted while the internal connection heals. The stoma site wound itself usually heals from the inside out over a few weeks, and some people find it takes longer than expected to close fully. The adjustment period for bowel function can extend to several months as your body relearns how to process and store waste through the reconnected pathway.