Hemorrhoidectomy and Bladder Complications
Yes, hemorrhoidectomy carries a significant risk of postoperative urinary retention, occurring in 2-36% of patients, making it one of the most common complications of this procedure. 1
Incidence and Significance
Urinary retention is a well-established complication following hemorrhoidectomy with considerable variability in reported rates:
The American Gastroenterological Association guidelines report urinary retention rates of 2-36% following conventional hemorrhoidectomy, representing one of the most frequent complications alongside bleeding, anal stenosis, infection, and incontinence. 1
Recent multicenter data from 2023 showed urinary retention in 0.2% of surgically treated hemorrhoid patients, though this lower rate may reflect selective reporting of severe cases requiring intervention. 2
Studies specifically examining this complication report rates of 13.7-32.8%, with the higher end representing more comprehensive surveillance. 3, 4
Key Risk Factors
The evidence identifies several important predictors that increase urinary retention risk:
Patient Demographics
- Male sex increases risk 1.5-fold (OR 1.52,95% CI 1.13-2.04), though one study paradoxically found female gender to be a risk factor (OR 2.607). 3, 5
- Advanced age increases risk 1.6-fold (OR 1.62,95% CI 1.14-2.28). 3
- Higher body mass index increases risk 1.4-fold (OR 1.37,95% CI 1.04-1.81). 3
Surgical Factors
- Resection of ≥4 hemorrhoids increases risk 1.5-fold (OR 1.46,95% CI 1.12-1.89) compared to fewer resections. 3
- Third- or fourth-degree hemorrhoid severity significantly increases retention risk (OR 2.658-3.101). 5, 4
Anesthetic Considerations
- Spinal anesthesia increases risk 2.5-fold (OR 2.481) compared to other anesthetic techniques. 5, 4
- Epidural anesthesia is also a significant predictor of urinary retention. 4
- Addition of morphine to spinal anesthesia provides better pain control at 6-12 hours but increases urinary retention to 15% and pruritus to 30%. 6
Perioperative Management
- Intravenous fluid administration >700 mL increases risk 1.6-fold (OR 1.597). 5
- Use of supplementary analgesics doubles the risk (OR 2.06,95% CI 1.57-2.68). 3
- Hospital stay >7 days increases risk 1.9-fold (OR 1.852), likely reflecting more complex cases. 5
Clinical Implications
The AGA guidelines specifically mention that parasympathomimetic drugs have been used to avoid urinary retention, though results have been mixed. 1 This acknowledgment in major guidelines underscores that urinary retention is a recognized and clinically significant complication requiring preventive strategies.
Important Caveats
The wide range in reported incidence (2-36%) reflects differences in diagnostic criteria, surveillance intensity, and patient populations. 1
Stapled hemorrhoidectomy shows comparable complication rates to conventional techniques, including urinary retention, while offering advantages in pain reduction and faster recovery. 1
Excessive retraction and extensive anal canal dilation during surgery can cause sphincter injury, contributing to both incontinence and potentially affecting bladder function through pelvic floor disruption. 1
Practical Recommendations
When counseling patients about hemorrhoidectomy:
Inform patients that urinary retention occurs in approximately 1 in 5-10 patients (using the conservative middle range of reported incidences). 1
Identify high-risk patients: older males with high BMI, severe hemorrhoids requiring extensive resection, and those receiving spinal/epidural anesthesia. 3, 5
Limit perioperative IV fluids to <700 mL when feasible to reduce retention risk. 5
Consider alternative anesthetic techniques in high-risk patients, as spinal/epidural anesthesia significantly increases retention rates. 5, 4
Monitor postoperatively for 24 hours, as most retention occurs within this timeframe and requires prompt recognition for appropriate management. 5