Medical Notice: Urinary catheterization is a medical procedure. A physician, nurse practitioner, or urologist should prescribe catheter type, size, and frequency of use. Clean intermittent catheterization (CIC) technique should be taught by a qualified nurse or urologist before performing independently. This guide provides educational information — it does not replace clinical training or professional medical advice.
Urinary Catheters: Complete Guide for Patients & Caregivers 2026
A urinary catheter is a thin, flexible tube inserted through the urethra into the bladder to drain urine when normal voiding is not possible or safe. Catheters are prescribed for a range of conditions — including urinary retention, neurogenic bladder dysfunction following spinal cord injury or multiple sclerosis, post-surgical recovery, and end-stage urological conditions. For patients who use catheters long-term, understanding the different types, proper care techniques, and how to prevent infection is essential to staying healthy and independent. AllCare Store carries urological care supplies, incontinence products, and personal care items — explore our incontinence and toileting collection for catheter supplies and related products.
Types of Urinary Catheters
Intermittent Catheters (In-and-Out Catheters)
Intermittent catheters are inserted into the bladder to drain urine and then removed immediately — they are not left in place. They are used on a schedule (typically every 4–6 hours) to empty the bladder in patients who cannot void on their own or cannot empty the bladder completely. Intermittent catheterization is the preferred method for long-term bladder management in spinal cord injury patients, those with neurogenic bladder dysfunction, and many others — it carries significantly lower infection risk than indwelling catheters when performed correctly with clean technique.
Straight catheters: Simple straight-tipped tubes in various lengths — standard length (16 inches, for women and general use) and male length (40 cm / 16 inches or longer). Available in multiple French sizes (typically 12–18 Fr); French size indicates diameter (larger number = larger tube). The prescribing clinician determines the appropriate size.
Coudé-tip catheters: Catheters with a curved or angled tip ("coudé" is French for elbow). The curved tip is used to navigate past an enlarged prostate or urethral stricture that prevents straight-tip advancement. Coudé catheters require training for proper directional insertion — the tip must point upward toward the ceiling during insertion in a male patient to navigate the urethral curve near the prostate. If a standard catheter consistently meets resistance, a coudé-tip catheter may be needed; consult your urologist.
Hydrophilic-coated catheters: Catheters with a slippery hydrophilic coating that becomes lubricated on contact with water, eliminating the need for a separate lubricant packet. Research suggests hydrophilic catheters reduce urethral trauma and catheter-associated UTI compared to uncoated catheters used with lubricant. They are more expensive per unit and some require activation in a water sleeve; others are pre-lubricated in a closed system. For long-term daily catheter users, hydrophilic catheters are worth considering.
Closed-system (no-touch) catheters: Pre-lubricated catheters packaged with an introduction tip, a collection bag, and a grip sleeve, designed to be inserted without the catheter surface ever being touched by the user's hands. These are particularly useful for users who catheterize away from home, in non-sterile environments, or for whom contamination risk is especially high. The closed system prevents hand contamination of the catheter surface during insertion.
Indwelling Catheters (Foley Catheters)
Indwelling catheters are inserted into the bladder and left in place for an extended period — hours, days, or months. They are held inside the bladder by a small balloon near the tip that is inflated with sterile water after insertion. Urine drains continuously through the catheter into a collection bag. Indwelling urethral catheters (Foley catheters) are used in hospital settings for surgical patients, for urinary retention that cannot be managed with intermittent catheterization, and sometimes for palliative care when frequent catheter insertion is not feasible.
Long-term use of indwelling urethral catheters carries substantial infection risk — nearly all patients with a urethral Foley catheter in place for more than 30 days develop bacteriuria (bacteria in the urine), and a significant percentage develop catheter-associated urinary tract infections (CAUTIs). For this reason, long-term indwelling urethral catheters are avoided when possible, and alternatives (intermittent catheterization, suprapubic catheters, or external catheters) are preferred for long-term management.
Suprapubic Catheters
A suprapubic catheter enters the bladder through the lower abdomen (above the pubic bone) rather than through the urethra. It is surgically placed by a urologist and held in place by an internal balloon, similar to a Foley catheter. Suprapubic catheters are used for long-term bladder drainage in patients for whom urethral catheterization is not feasible — due to urethral damage, surgery, severe prostate obstruction, or patient preference. The suprapubic route reduces the risk of urethral injury and urinary tract infection compared to long-term urethral catheters, and allows sexual activity. The site requires daily cleaning and periodic catheter changes by a nurse or trained patient/caregiver.
External Catheters (Condom Catheters)
External catheters for males (condom catheters) are silicone or latex sheaths that fit over the penis and connect via tubing to a urine collection bag — nothing is inserted into the urethra. They are used for managing urinary incontinence in men who can urinate but cannot control the timing or volume of voiding, and for men who cannot tolerate urethral catheterization. They eliminate the infection risk associated with urethral insertion. Skin breakdown under the sheath is the primary complication, prevented by proper sizing, daily removal and skin inspection, and complete drying of the skin before reapplication. A variety of skin-friendly adhesives and protective barriers are available to secure the sheath and protect peri-sheath skin.
For females, external catheter options are more limited and less established than for males, but external female catheter systems (typically a cup-and-suction design that seals at the urethral meatus) are available and prescribed for selected patients. These require careful fitting and patient training.
Catheter Sizing: French Sizes Explained
Catheter diameter is measured in French (Fr) sizes — a standardized scale where each French unit equals 0.33 mm (so a 12 Fr catheter is 4 mm in diameter; an 18 Fr catheter is 6 mm). Smaller French sizes are less traumatic and reduce irritation; larger sizes drain more quickly and resist kinking. The appropriate French size is determined by a clinician based on the individual patient's anatomy and clinical need. Common sizes for adults range from 12–18 Fr for intermittent catheters and 14–20 Fr for indwelling catheters. Foley catheters also have a specified balloon volume (typically 5–10 mL for standard use and 30 mL for post-surgical applications); use the balloon volume specified by the physician — using the wrong volume can cause discomfort or inadequate retention.
Clean Intermittent Catheterization (CIC): Overview
CIC is the technique of inserting and removing an intermittent catheter using a clean (not sterile) technique in a non-hospital setting. It has been the standard approach for home catheterization since the 1970s and is supported by decades of evidence as safe and effective for long-term bladder management. Clean technique means thorough hand washing and use of a clean (not sterile) catheter, using proper position and insertion technique to minimize contamination, and using appropriate lubrication to reduce urethral trauma.
The specific steps of CIC — positioning, cleansing the urethral meatus, catheter insertion depth, confirming urine drainage, and withdrawal — should be taught and practiced with a nurse or continence specialist before performing independently at home. Technique varies for female versus male patients due to anatomical differences. Female patients benefit from a mirror for initial learning to locate the urethral meatus. Males insert the catheter to a greater depth (typically 7–9 inches) and may need a coudé-tip catheter if the prostate is enlarged.
Preventing Catheter-Associated Urinary Tract Infections (CAUTI)
CAUTI is the most common healthcare-associated infection, and prevention is central to catheter care. Key prevention strategies for patients managing catheters at home:
Perform thorough hand hygiene. Wash hands with soap and water for at least 20 seconds before and after catheter handling. Hand hygiene is the single most effective CAUTI prevention measure.
Clean the urethral opening before insertion. For females, cleanse the labia and urethral meatus front to back with a damp cloth or cleansing wipe before each CIC. For males, clean the urethral meatus at the tip of the penis. This reduces the number of bacteria introduced into the urethra during insertion.
Use adequate lubrication. Urethral trauma from inadequately lubricated catheter insertion introduces bacteria and creates a pathway for infection. Use sterile lubricating jelly (lidocaine-based if prescribed, or plain sterile lubricant) for uncoated catheters. Hydrophilic catheters are pre-lubricated. Never use anything except approved lubricant — petroleum jelly, lotion, and similar products are not appropriate urethral lubricants.
Maintain adequate fluid intake. Drinking 6–8 glasses of fluid daily keeps urine dilute, which flushes the lower urinary tract and reduces bacterial growth between catheterizations. Low fluid intake concentrates urine, which irritates the bladder and promotes infection. Avoid reducing fluid intake to reduce catheterization frequency — this worsens infection risk.
Catheterize on schedule. Allowing the bladder to overdistend (overfill beyond capacity) damages the bladder wall and creates conditions favorable for infection. Stick to the prescribed catheterization interval and increase frequency temporarily if fluid intake increases (hot weather, illness).
Recognize UTI symptoms promptly. Fever, chills, increased spasticity (in spinal cord injury patients), cloudy or foul-smelling urine, lower abdominal or back pain, and burning during catheter insertion may indicate a UTI. Contact your physician promptly — CAUTIs require antibiotic treatment and should not be managed with cranberry juice or other home remedies alone.
Indwelling Catheter Care
For patients with a Foley or suprapubic catheter left in place, daily care prevents infection and skin breakdown:
Perineal hygiene: Clean the area around the catheter entry point (urethral or suprapubic) once daily and after any bowel movement with soap and water. Do not pull on the catheter; clean around it gently. For suprapubic catheters, clean the skin around the tube entry site and check for redness, swelling, or discharge that may indicate site infection.
Catheter anchoring: Secure the catheter to the inner thigh with a catheter strap to prevent accidental traction (pulling) on the catheter. Repeated traction on an indwelling catheter causes urethral damage and pain. Do not allow the catheter or drainage tubing to kink or loop.
Drainage bag management: Keep the drainage bag below the level of the bladder at all times to prevent urine from flowing back into the bladder. Empty the bag when two-thirds full or every 8 hours. Do not allow the drainage bag spigot to touch the floor or collection container during emptying. Use a leg bag during the day (straps to thigh, discreet under clothing) and a larger night bag during sleep.
Catheter changes: Indwelling catheters require regular replacement to prevent encrustation and infection. The prescribed change interval depends on catheter type and patient history (typically every 4–8 weeks for silicone catheters). Catheter changes for indwelling catheters should be performed by a qualified nurse or clinician, or by a patient/caregiver trained specifically in the procedure.
Catheter Supplies You May Need
Depending on your catheter type, supplies needed include:
- Intermittent catheters (appropriate type, size, and quantity per prescription)
- Sterile lubricating jelly packets (for uncoated catheters)
- Pre-moistened cleansing wipes or washcloths
- Urine collection bags (leg bags and overnight bags for indwelling catheters)
- Catheter leg bag straps or holders
- Catheter securement devices (for indwelling catheters)
- Waterproof underpads (Chux) for home catheterization comfort
- Sterile water or normal saline for balloon inflation (for Foley changes)
- Gloves (for caregivers performing catheter care)
- Skin barrier/barrier cream for peri-catheter skin protection
Most intermittent catheter supplies are covered by Medicare Part B and most insurance plans with a physician's prescription documenting medical necessity. Check with your insurance plan for coverage details and approved suppliers.
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Frequently Asked Questions: Urinary Catheters
How often should I perform clean intermittent catheterization?
The standard CIC schedule for most adults is every 4–6 hours while awake, totaling 4–6 catheterizations per day. The exact frequency is determined by your prescribed fluid intake, bladder capacity, and how much residual urine remains after any spontaneous voiding. Your urologist or continence nurse will determine the appropriate schedule for your specific situation. The goal is to keep bladder volumes below 400–500 mL between catheterizations to prevent overdistension, which damages the bladder wall and increases infection risk. If your scheduled catheterizations consistently drain very small volumes (under 100 mL), you may be catheterizing too frequently; if volumes are consistently over 500 mL, the interval is too long.
Can I reuse intermittent catheters?
In the United States, intermittent catheters are labeled for single use by the FDA and are reimbursed by Medicare as single-use devices. Some patients clean and reuse catheters for cost reasons, and there is limited research supporting this in specific patient populations with clean technique and proper catheter washing. However, reuse is not recommended by most US clinical guidelines because sterilization at home is not achievable, reuse degrades catheter materials (causing cracks and surfaces that harbor bacteria), and single-use catheters are covered by Medicare for qualifying patients. If cost is a barrier to single-use catheters, speak with your prescribing physician or a continence nurse about insurance coverage and assistance programs.
What is the difference between a latex and silicone catheter?
Latex catheters are softer and more flexible, but latex allergy is a significant concern — individuals with latex allergy can develop serious reactions from urethral exposure to latex. Latex is also more prone to encrustation with long-term indwelling use. Silicone catheters are latex-free, resist encrustation better than latex, and have a smoother surface. They are firmer than latex, which some users find more difficult to insert but more predictable in behavior. For long-term indwelling use, silicone or silicone-coated catheters are preferred over latex. For intermittent catheterization, PVC (vinyl) is the most common material for single-use catheters. All patients with a known latex allergy must use latex-free products; this should be clearly communicated to any healthcare provider managing catheter changes.
My catheter is leaking urine around it — what should I do?
Leakage around an indwelling catheter (called bypass leakage or catheter leakage) is common and has several possible causes. Bladder spasms — involuntary contractions of the bladder wall — are the most common cause; they force urine past the catheter balloon. Constipation (pressure from the rectum stimulates bladder spasms), bladder irritation from the catheter balloon, catheter blockage (causing pressure buildup), and a catheter that is too small for the patient can all contribute. Do not respond to bypass leakage by upsizing the catheter or inflating the balloon with more water than prescribed — these approaches worsen bladder irritation and spasm. Contact your nurse or physician for evaluation. Short-term antispasmodic medications, catheter irrigation to clear blockage, or changing catheter type may resolve the problem.
