Chart — Fundamentals
Urinary Catheter Types Comparison Chart
From in-and-out straight catheters to suprapubic tubes — what each catheter is, who actually needs it, how long it stays, and the nursing point that keeps it from becoming a CAUTI.
Educational use only. Catheter selection and insertion require an order or nurse-driven protocol authorization; difficult insertions and suprapubic changes belong to the provider or urology. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Catheter-by-Catheter Comparison
| Type | What It Is | Used For | Duration | Key Nursing Point |
|---|---|---|---|---|
| Straight / intermittent (in-and-out) | Single-lumen catheter inserted to drain the bladder, then removed — no balloon | Intermittent self-catheterization (neurogenic bladder), post-void residuals when no scanner, sterile specimens, one-time retention relief | Minutes, repeated on a schedule | Lowest infection risk of the insertable options; teach clean technique for home self-cath, sterile in hospital |
| Indwelling (Foley) | Double-lumen catheter retained by a saline-inflated balloon, draining continuously to a closed bag | Retention, hourly output in critical illness, select perioperative cases, sacral wound healing, end-of-life comfort | Days — reviewed daily for removal | Full CAUTI bundle: closed system, bag below bladder and off the floor, secure to thigh, daily necessity review |
| Three-way (triple lumen) | Foley with a third lumen for continuous bladder irrigation (CBI) | After TURP/bladder surgery, clot retention, gross hematuria | Days, while irrigation is needed | Run irrigation fast enough to keep urine pink and clot-free; output minus irrigant = true urine; sudden stop in drainage with bladder spasms = suspected clot obstruction, act now |
| Coudé tip | Curved, rigid tip designed to navigate an enlarged prostate or urethral obstruction | Men with BPH or known difficult urethras | Same as the Foley it replaces | Insert with the curved tip pointing up (12 o'clock); never force any catheter — failed passage goes to the provider/urology |
| Suprapubic | Surgically placed through the abdominal wall directly into the bladder | Long-term drainage when the urethral route is unusable or harmful (strictures, injury, long-term need) | Long-term; changed on a schedule | Site care like any percutaneous tube; first changes are provider/specialty tasks; still a CAUTI risk — same closed-system rules |
| External — condom catheter / female external device | Non-invasive: a sheath over the penis or a wicking device against the perineum, connected to suction or gravity drainage | Incontinence management without retention — the preferred alternative to an indwelling catheter | Changed daily / per device | Skin checks every shift; condom snug but not tight (one finger); does NOT treat retention — scan the bladder if output drops |
Exam Traps
- ✦Incontinence alone → external catheter or toileting program, never an indwelling Foley.
- ✦CBI math: drainage bag volume minus irrigant instilled = actual urine output.
- ✦CBI drainage stops + suprapubic pain/spasms = suspected clot obstruction — assess and notify; don't just chart it.
- ✦Coudé tip points up; resistance during any insertion means stop, not push.
- ✦External devices don't drain a retaining bladder — falling output still needs a bladder scan.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with American Nurses Association (ANA) Standards of Practice · The Joint Commission. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →