Foley Catheter
A Foley catheter provides indwelling bladder drainage through a drainage lumen and a separate balloon channel. Appropriate indication, atraumatic placement, a closed drainage system, and removal when drainage is no longer needed matter more than choosing a particular coating. After reconstruction, catheter size, route, duration, and removal assessment follow the repair-specific plan.[1][2]
Choose the device for the task
| Feature | Practical selection |
|---|---|
| Two-way catheter | Routine continuous drainage; one drainage lumen and one balloon channel. |
| Three-way catheter | Adds an irrigation lumen when clot obstruction is anticipated or needs treatment. It is not required after every urologic operation; see Three-Way Catheter. |
| Diameter | Use the smallest bore that drains adequately. EAUN gives 12–14 Fr as an adult example for clear urine without debris; blood, debris, a reconstruction, or a particular device may require a different size. Body size alone is not a reason to upsize. |
| Length | A male urethra requires a standard male-length catheter. Never use a short female-length Foley in a male urethra. |
| Balloon | Use the inflation volume and fluid specified for that model. Sterile water is common; some products specify another solution. A 30-mL balloon is a specialized option, not a treatment for leakage around a routine catheter. |
| Latex / coated latex | Coating does not eliminate the latex core. Check all components when latex allergy is present. |
| All-silicone | An option for latex avoidance and longer-term drainage. CDC notes a possible advantage in patients with frequent encrustation/obstruction; this does not establish superiority for every outcome. |
| Hydrogel or antimicrobial coating | Lubricity, bacteriuria, symptomatic infection, and comfort are different outcomes. Do not assume that a coating prevents CAUTI or stricture. |
These choices follow EAUN 2024 and CDC recommendations; the package instructions remain the source for model-specific handling and maximum dwell time.[1][2]
Indications and alternatives
Appropriate uses include acute retention/obstruction; accurate output measurement in selected critically ill patients; selected perioperative care; drainage protecting a urinary repair; assistance with healing an open sacral or perineal wound in an incontinent patient; and patient-centered comfort care. A catheter is not a routine response to incontinence, staff workload, or the need for a urine specimen from someone who can void.[1]
Consider intermittent catheterization when emptying support is needed and it is feasible, an external collection device for appropriate incontinence without retention, or suprapubic drainage when the urethral route is unsuitable. The choice depends on anatomy, bladder pressures, function, patient preference, and caregiver support; these methods cannot be ranked by a single universal infection or quality-of-life hierarchy.[1][2][3]
Before attempting insertion
Review prior difficult catheterization, urethral reconstruction or stricture, bladder-neck surgery, and any implanted continence device. Acute prostatitis and suspected urethral injury require a deliberate drainage plan.[2]
In trauma with strong suspicion of urethral injury, such as meatal blood with a pelvic fracture, obtain appropriate urethral assessment—usually retrograde urethrography in a male—before instrumentation when feasible. ACS allows a single careful experienced attempt in selected circumstances when assessment is unavailable; it is not permission for repeated blind attempts. Its trauma guidance favors a straight tip, with the attempt stopped for resistance or failure to obtain urine.[4]
Insertion safety
For acute-care insertion, use hand hygiene, trained personnel, aseptic technique, sterile equipment, and compatible single-use lubricant. Follow the product instructions for preparation and insertion.[1][2]
- Advance gently; stop for unexpected resistance, marked pain, or bleeding. A catheter is not a urethral dilator.
- Urine return alone does not establish that the balloon is safely inside the bladder. In a male, advance to the catheter bifurcation/hub before inflation, provided passage is free and bladder placement is established. Follow the relevant technique for female or reconstructed anatomy.
- Inflate only after intravesical position is established, using the specified fluid and volume. Stop if inflation causes pain or resistance; reassess rather than continuing.
- Secure the catheter without traction, connect closed drainage, and return a retracted foreskin to its normal position.
These safeguards are emphasized in EAUN guidance and the manufacturer's male insertion demonstration.[2][5]
Maintenance and removal
Maintain a closed system, keep tubing unkinked and the bag below bladder level and off the floor, and use routine daily hygiene rather than repeated antiseptic meatal cleaning. Replace the catheter and collection system aseptically if the closed system is compromised. Obtain a culture specimen from the sampling port using the recommended technique, not from the drainage bag.[1]
Do not schedule every catheter for a universal four-week change. Change for clinical indications such as obstruction, infection requiring replacement, or loss of system integrity, while respecting the manufacturer's maximum dwell time and an individualized plan for recurrent blockage. Fluid advice must account for cardiac/renal restrictions. Routine irrigation or antibiotics do not substitute for appropriate drainage and care.[1][2]
Remove promptly when the indication ends. The CDC preference for removal within 24 hours after surgery applies unless an appropriate continued indication exists; it does not override drainage protecting a reconstruction. Deflate and remove according to the device instructions without force. Plan a trial of void and residual assessment when relevant to the original indication and retention risk, with clear instructions for pain or inability to void. There is no universal six-hour or PVR threshold for all operations and patients.[1][2]
A 2021 Cochrane review found that shorter postoperative catheter duration probably reduces symptomatic CAUTI but may increase recatheterization. This supports procedure-specific removal decisions rather than a single duration for every repair.[6]
Troubleshooting and complications
| Problem | First assessment |
|---|---|
| Little or no drainage | Check kinks, bag position, fluid status, blockage and catheter position. Distension, pain, hematuria or a recent reconstruction may require prompt urologic assessment and imaging; avoid forceful manipulation. |
| Leakage around the catheter | Assess obstruction, spasm, constipation, traction and an excessively large catheter. Reflex upsizing or increasing balloon volume can worsen irritation. |
| Pain or blood after insertion | Consider urethral/balloon malposition or trauma; stop further blind attempts. |
| Balloon will not deflate | Follow a trained troubleshooting pathway. Do not pull an inflated balloon through the urethra. |
| Chronic urethral pressure injury | Reassess securement, size and the drainage route; consider suprapubic drainage where appropriate. |
EAUN describes these complications and emphasizes correcting the cause rather than treating bypass leakage as a diagnosis in itself.[2] In Saint's 2018 multicenter cohort, 1,184/2,076 evaluable patients reported at least one catheter-associated problem within 30 days; most were noninfectious. These were patient-reported outcomes in a largely perioperative cohort, not culture-confirmed infection rates for all catheter users.[7]
Bacteriuria is not CAUTI
CDC estimates that bacteriuria develops in approximately 3–7% of catheterized patients per day, becoming nearly universal after a month. This is colonization risk, not the daily incidence of symptomatic UTI. Do not routinely screen for or treat asymptomatic bacteriuria; pregnancy and selected urologic procedures that breach the mucosa are important exceptions. Evaluate compatible symptoms and other causes before diagnosing CAUTI.[8]
The strongest prevention strategy is appropriate use, good insertion/maintenance practice, and limiting unnecessary duration. Silver-alloy catheters did not reduce symptomatic CAUTI in the large trial summarized by the 2014 Cochrane review; nitrofurazone produced a small reduction with more discomfort. CDC reserves consideration of antimicrobial/antiseptic catheters for persistently high CAUTI rates despite a comprehensive prevention strategy.[1][9]
For drug choices, see UTI Suppressive & Prophylactic Therapy and Non-Antibiotic UTI Prevention.
Difficult catheterization
After an unsuccessful attempt, reassess the likely cause and obtain experienced help. A correctly oriented coudé catheter can help selected patients with prostatic angulation. Known stricture, a false passage, prior repair, bleeding, or persistent resistance may favor early cystoscopy and Council-tip placement over a confirmed intravesical wire, or suprapubic drainage. Repeated blind upsizing and guidewire-stiffening are not mandatory steps before specialist access.[2][4]
References
1. CDC. Guideline for prevention of catheter-associated urinary tract infections (2009): Summary of recommendations. Web summary updated 2024.
2. European Association of Urology Nurses. Indwelling catheterisation in adults—urethral and suprapubic. 2024. Chapters 4–10.
3. Kidd EA, Stewart F, Kassis NC, Hom E, Omar MI. Urethral (indwelling or intermittent) or suprapubic routes for short-term catheterisation in hospitalised adults. Cochrane Database Syst Rev. 2015;(12):CD004203. doi:10.1002/14651858.CD004203.pub3
4. American College of Surgeons. Best practices guidelines: management of genitourinary injuries. 2025. Initial evaluation and urethral catheter placement.
5. BD. SureStep Foley catheter in-service video. Manufacturer insertion demonstration; use the current package instructions for the selected device.
6. Ellahi A, Stewart F, Kidd EA, et al. Strategies for the removal of short-term indwelling urethral catheters in adults. Cochrane Database Syst Rev. 2021;6:CD004011. doi:10.1002/14651858.CD004011.pub4
7. Saint S, Trautner BW, Fowler KE, et al. A multicenter study of patient-reported infectious and noninfectious complications associated with indwelling urethral catheters. JAMA Intern Med. 2018;178(8):1078-1085. doi:10.1001/jamainternmed.2018.2417
8. CDC. Indwelling urinary catheter culture stewardship: overview.
9. Lam TB, Omar MI, Fisher E, Gillies K, MacLennan S. Types of indwelling urethral catheters for short-term catheterisation in hospitalised adults. Cochrane Database Syst Rev. 2014;(9):CD004013. doi:10.1002/14651858.CD004013.pub4