For people with an enlarged prostate (BPH), a urethral stricture, or a history of difficult catheterization, the shape of the catheter tip can make a real difference to how easily a catheter passes. Intermittent catheters come in three main tip designs. Each takes a different approach to the curves and narrow points of the male urethra, and Canadian best practice recommendations are clear that no single catheter is the right option for every patient.[1]
Straight (Nelaton) Tip
The standard, or Nelaton, catheter has a soft, rounded tip on a straight shaft. It is often the catheter people start with when they first learn intermittent catheterization.[1]
Coudé (Tiemann) Tip
Coudé comes from the French word for "elbowed." A Coudé or Tiemann catheter has a firmer tip that is curved at an angle. It is inserted with the curve pointing upward (toward 12 o'clock), which helps it follow the natural upward bend of the male urethra near the prostate.
Canadian best practice recommendations describe this design as useful for people with a narrow urethral passage or prostatic obstruction, where the angled, slightly firmer tip can make it easier to pass obstructed areas.[1] Coudé catheters are widely used for self-catheterization and are available both uncoated and with hydrophilic coatings.[1]
Flexible Rounded Tip
A third design uses a soft, rounded bead at the tip, followed by a flexible front section, on a firmer shaft. Canadian best practice recommendations describe this design as centring the catheter in the urethra and allowing it to be guided through curves and bends, including in men with prostate enlargement or strictures.[1] Several manufacturers make catheters of this type; the IQ Catheter is one of them.
Tip Designs at a Glance
| Straight (Nelaton) | Coudé / Tiemann | Flexible rounded | |
|---|---|---|---|
| Tip shape | Soft, rounded, straight | Firmer, angled curve | Rounded bead on a flexible front section |
| Needs to be oriented during insertion? | No | Yes — curve points upward | No |
| Often considered for[1] | Routine catheterization; often the first catheter learned | Narrow urethral passage or prostatic obstruction | Difficult male anatomy, including prostate enlargement or strictures |
| Lubrication options | Uncoated (with gel) or pre-lubricated | Uncoated (with gel) or pre-lubricated | Uncoated (with gel) or pre-lubricated |
Practical Considerations
- Hand function. A Coudé tip needs to be kept pointing in the right direction during insertion. For people with limited hand function — for example after a cervical spinal cord injury — straight and flexible-tip designs don't need to be oriented, which some find easier. An occupational therapist or continence nurse can help assess what works for you.
- Sensation. If you have reduced sensation, you may not feel the resistance or discomfort that would normally warn you to stop. With any tip design, stop if you meet significant resistance or see bleeding, and contact your care team.
- Lubrication. Hydrophilic coatings lubricate the full length of the catheter, whereas gel applied to an uncoated catheter tends to be wiped off at the urethral opening.[1]
- Size. A catheter should be large enough to drain freely but small enough to reduce the risk of trauma.[1]
- Trying options. Canadian recommendations encourage people to see and try samples of catheters appropriate for them before settling on one.[1]
Thinking About Switching?
Talk to your urologist or continence nurse before changing tip design, especially if you have a stricture, have had urethral or prostate surgery, or have had a false passage. Technique differs between designs — for example, straight and flexible-tip catheters don't need to be rotated to a set position — so it can take a few insertions to get comfortable with a new catheter. Your care team can help you judge whether a change is working for you.
Straight, Coudé/Tiemann and flexible rounded tips each have a place. The best choice depends on your anatomy, hand function, sensation and preferences, and is worth making with your care team, ideally after trying the options.
If you and your care team want to evaluate a flexible-tip catheter, complimentary IQ Catheter samples are available — no obligation, shipped to you directly.
Request a Patient Sample →About the IQ Catheter
The IQ Catheter is manufactured by Manfred Sauer GmbH in Germany. It is a single-use catheter, available in hydrophilic and gel versions, with a soft, rounded tip on a bendable neck, a flexible front section, and a firmer guiding shaft. It is available in CH 10–18, in male and female lengths.
IQ Catheter Canada is the exclusive Canadian master distributor. Healthcare professionals across Canada can request complimentary samples for clinical evaluation — no purchase commitment required.
Complimentary IQ Catheter samples are available for clinical evaluation — no purchase commitment required.
Request HCP Samples →This article was written by IQ Catheter Canada, which distributes the IQ Catheter in Canada. It is general information, not medical advice. Talk to your healthcare provider about your own situation.
References
- Nurses Specialized in Wound, Ostomy and Continence Canada, Canadian Nurse Continence Advisors, Urology Nurses of Canada, and Infection Prevention and Control Canada. Clean Intermittent Urethral Catheterization in Adults – Canadian Best Practice Recommendations for Nurses. 1st ed. 2020. PDF