If you or someone you care for has been told that bladder drainage is needed, you may have heard about two main options: an indwelling catheter that stays in place continuously, or intermittent catheterization (CIC/ISC) where a catheter is inserted and removed several times a day. Understanding the differences between these approaches — honestly, including the tradeoffs — helps patients make informed decisions alongside their healthcare team.
This article provides a clear comparison of both options.
What Is an Indwelling Catheter?
An indwelling urinary catheter — often called a Foley catheter — is a hollow, flexible tube inserted into the bladder through the urethra and held in place by a small balloon inflated with sterile water inside the bladder. Urine drains continuously through the catheter into an attached drainage bag worn on the leg during the day, and a larger overnight bag at night.
There is also a variation called a suprapubic catheter, which is inserted through a small opening made surgically in the lower abdomen rather than through the urethra. This offers some advantages over urethral catheters for long-term use, including reduced urethral irritation and the ability to maintain a more normal sex life.
Indwelling catheters require periodic changes — standard urethral catheters are changed every 10–12 weeks by a district nurse or urology nurse; suprapubic catheters are typically changed every 6–8 weeks.
What Is Intermittent Catheterization?
Intermittent catheterization — clean intermittent catheterization (CIC) or intermittent self-catheterization (ISC) — involves inserting a catheter into the bladder to drain urine, then removing it completely. There is no catheter in place between sessions. The procedure is typically performed 4–6 times per day, wherever the person happens to be.
The catheter is disposable and discarded after each use. The entire procedure takes a few minutes once learned. Most people manage it independently within a few weeks of learning the technique.
Why Someone Might Need a Catheter
Both types of catheterization are used when the bladder cannot drain properly on its own. Common reasons include:
- Urinary retention — inability to fully empty the bladder — due to BPH, urethral strictures, post-surgical changes, or neurological conditions
- Neurogenic bladder from spinal cord injury, multiple sclerosis, spina bifida, or other neurological conditions
- Acute urinary retention as an emergency measure
- Post-surgical recovery (e.g., after prostate surgery, bladder surgery, or certain gynaecological procedures)
- Incontinence management as a last resort when other treatments have failed
- Instilling medications directly into the bladder
Head-to-Head Comparison
| Factor | Indwelling (Urethral) | Suprapubic | Intermittent (CIC) |
|---|---|---|---|
| How it works | Stays in place continuously; balloon holds it in bladder | Stays in place; enters through abdominal wall | Inserted and removed multiple times daily |
| UTI risk | Higher — continuous foreign body in bladder | Higher — similar to urethral | Lower — no continuous foreign body |
| Urethral trauma | Risk of ongoing urethral irritation/damage | No urethral impact | Minimal with correct technique and hydrophilic catheter |
| Bladder function | Bladder no longer fills/empties normally; may shrink | Same as urethral indwelling | Bladder fills and empties; function better preserved |
| Sex life | Can be affected; requires discussion | Better suited to sexual activity | No catheter in place; no restriction |
| Independence | No active participation required | No active participation required | Patient controls their own bladder management |
| Physical requirements | None — suitable for those who cannot self-catheterize | None after insertion | Requires manual dexterity and cognitive ability |
| Who changes it | District nurse or urology nurse every 10–12 weeks | Nurse every 6–8 weeks | Patient, caregiver, or nurse each time |
| Discreetness | Leg bag visible; requires management | Bag under clothing; site management needed | No external equipment when not catheterizing |
The Case for CIC: Why It's Usually Preferred When Possible
Clinical guidelines consistently favour intermittent catheterization over long-term indwelling catheters when the patient is physically and cognitively able to perform CIC. The reasons are compelling:
- Significantly lower infection risk. An indwelling catheter creates a continuous pathway for bacteria to travel into the bladder. Studies show that virtually all indwelling catheter users develop bacteriuria within three weeks; UTI rates with CIC are substantially lower.
- Better preservation of bladder function. When a catheter drains the bladder continuously, the bladder muscle has no opportunity to contract normally. Over time this can cause the bladder to lose capacity and tone. CIC allows the bladder to fill and empty cyclically, maintaining its functional properties.
- No leg bag. The absence of an external drainage bag and associated tubing has a significant positive impact on body image and quality of life. CIC users report feeling more "normal" and unrestricted in social and physical activity.
- Uninterrupted sex life. With no catheter in place between sessions, CIC is compatible with an active sex life in a way that urethral indwelling catheters are not.
- Lower long-term complication rates. Bladder stones, urethral damage, and chronic bladder changes are more common with long-term indwelling catheter use than with CIC.
CIC requires sufficient manual dexterity, the cognitive ability to learn and remember the procedure, and adequate bladder capacity. For patients who cannot self-catheterize and do not have a caregiver who can assist, an indwelling catheter may be the appropriate choice. The decision should always be made on an individual basis with the patient's healthcare team.
Living Well with an Indwelling Catheter
For patients who do need an indwelling catheter — whether urethral or suprapubic — good management practices significantly reduce complications:
- Wash the catheter entry site and surrounding area twice daily with soap and water; dry thoroughly
- Keep the drainage bag below the level of the bladder at all times to prevent urine backflow
- Drink 1.5–2 litres of fluid daily and minimize caffeine and alcohol
- Never disconnect the leg bag from the catheter unless changing it — every disconnection is an opportunity for bacteria to enter
- Change the leg bag every 5–7 days; always use a sterile replacement
- Watch for signs of blockage, bypassing, or infection and contact your nurse promptly
Transitioning from Indwelling to Intermittent Catheterization
Many patients who begin with an indwelling catheter — particularly after acute urinary retention, surgery, or a period of acute illness — are candidates to transition to CIC once their condition stabilises. This is worth discussing proactively with your urologist or continence nurse. The transition is common and well-supported, and most patients who make the switch find CIC to be meaningfully better for their quality of life.
For patients who are physically and cognitively able to perform CIC, intermittent catheterization is the preferred approach over indwelling catheters — with lower infection rates, better bladder function preservation, greater independence, and improved quality of life. An indwelling catheter remains an important and valid option when CIC is not feasible, but it should not be the default choice when the alternative is viable.
About the IQ Catheter for CIC Users
If you are starting or continuing with intermittent catheterization — or transitioning from an indwelling catheter — catheter selection matters. The IQ Catheter from Manfred Sauer GmbH features a flexible, atraumatic tip designed for difficult anatomy including urethral strictures, post-surgical changes, and prostatic obstruction, combined with a full-length hydrophilic coating that reduces friction and infection risk. Available in Canada exclusively through IQ Catheter Canada.
Healthcare professionals can request complimentary IQ Catheter samples for evaluation. Submit a sample request →