How to Flush a Suprapubic Catheter
Gentle irrigation with sterile saline using strict aseptic technique is the recommended approach when a suprapubic catheter is suspected to be obstructed, but routine flushing is NOT recommended for infection prevention. 1
When Flushing Is Appropriate
- Flush only when the catheter is malfunctioning or obstructed (e.g., no urine output, patient symptoms of retention, visible debris), not as routine maintenance 1
- Before attempting catheter removal or replacement, gentle irrigation can help confirm obstruction versus other causes of malfunction 1
- Use bladder scanning to verify retention: >300 mL in symptomatic patients or >500 mL in asymptomatic patients indicates significant retention requiring intervention 1
Flushing Technique
- Use strict sterile (aseptic) technique throughout the entire procedure 1
- Use sterile saline only—avoid antiseptic solutions 2
- Perform gentle irrigation; never force fluid if significant resistance is encountered
- Maintain the closed drainage system; only break it when absolutely necessary for the irrigation procedure 1
Critical Pitfalls to Avoid
- Do NOT perform routine catheter irrigation as a preventive measure against infection—this practice is explicitly not recommended 2, 1
- Do NOT instill antiseptic solutions into the catheter or bladder 2
- Avoid alcohol-based products near the catheter site, as they cause mucosal tissue drying 2
- Never routinely change or flush catheters on a schedule for infection prevention; only intervene when clinically indicated 1
Ongoing Maintenance (What You SHOULD Do)
- Keep the drainage system closed at all times to prevent catheter-associated infections 1
- Practice routine hygiene only—no special antiseptic cleaning 2, 1
- Ensure adequate patient hydration to maintain urine flow and reduce obstruction risk 3
- Secure the catheter to the abdomen to prevent migration 1
If Flushing Fails
- Consider temporary indwelling urethral catheter placement to decompress the bladder while arranging definitive suprapubic catheter management 1
- Clean intermittent catheterization may be used temporarily for appropriate patients 1
- Catheter replacement may be necessary if obstruction cannot be cleared 1