Before We Start
Why catheters are a last resort — not a first response
Urinary catheters are among the most overused devices in hospitals. They're convenient — for staff. They eliminate the need to assist patients to the bathroom, they provide accurate urine output measurements, and they keep incontinent patients dry. But they come at a significant cost to the patient.
Every day a urinary catheter is in place, the patient has a 3–7% chance of developing a CAUTI. CAUTIs cause pain, extend hospital stays, increase costs, and can progress to sepsis and death. The Joint Commission and CMS (Medicare/Medicaid) track CAUTI rates as quality metrics — hospitals are not reimbursed for treating CAUTIs that develop during hospitalization.
💡 Appropriate Indications for Urinary Catheterization
Acceptable indications:
• Acute urinary retention or bladder outlet obstruction
• Accurate urine output measurement in critically ill patients
• Perioperative use for selected surgical procedures
• Prolonged immobilization (unstable thoracic or lumbar spine fracture)
• Wound healing — open sacral or perineal wounds in incontinent patients
• Comfort care at end of life
NOT acceptable indications:
• Incontinence (convenience for staff)
• Routine urine collection for culture if patient can void
• Prolonged post-op monitoring without clinical need
Insertion Technique
Sterile technique from start to finish
Equipment selection
• Use the smallest gauge catheter appropriate (14–16 Fr for most adults)
• Foley (indwelling) vs straight (in-and-out): prefer straight catheter when possible — removed immediately after draining bladder, lower CAUTI risk
• Silicone catheters preferred for long-term use (less biofilm formation than latex)
• Latex-free for all patients with known or suspected latex allergy
Female catheter insertion — sterile technique
1. Set up sterile field per sterile technique rules
2. Don sterile gloves
3. Place sterile drape under patient's buttocks
4. Cleanse urinary meatus with antiseptic swabs — front to back, one wipe per swab (labia minora first, then meatus). Non-dominant hand is now contaminated — do not use for catheter handling
5. Apply sterile lubricant to catheter tip
6. Insert catheter 2–3 inches until urine returns, then advance 1–2 more inches before inflating balloon
7. Inflate balloon with sterile water per manufacturer specifications (usually 10mL)
8. Gently pull back until resistance is felt — balloon is seated against bladder neck
9. Secure catheter to inner thigh — prevents traction on bladder
💊 Advance 1–2 inches PAST where urine first appears before inflating the balloon. Inflating in the urethra causes severe pain and urethral injury.
Male catheter insertion
Hold penis at 90° angle (perpendicular to body) to straighten the urethra. Insert catheter 6–8 inches until urine returns (the male urethra is longer). Then advance 1–2 more inches before inflating balloon. If resistance is met — do not force. Notify provider.
Secure catheter to upper thigh or abdomen — prevents pressure on penile-scrotal angle which can cause fistula formation.
The CAUTI Bundle
Evidence-based interventions that prevent infection
C — Closed System
Never open the drainage system
The catheter, tubing, and drainage bag form a closed system. Opening any connection point introduces bacteria. Never disconnect tubing to obtain urine specimens — use the needleless sampling port on the tubing. Never irrigate the catheter without a specific order.
💊 Urine specimen needed? Use the needleless port — clean with alcohol, aspirate with sterile syringe. Never open the system at the catheter-tubing junction.
A — Always Below
Drainage bag always below bladder level — never on the floor
Gravity drains urine from the bladder into the bag. If the bag is above the bladder, urine (and bacteria) flows back into the bladder — causing infection and bypassing the protection of one-way drainage.
Keep the bag below the bladder at all times — when ambulating, when transferring, when in the wheelchair. Never place the bag on the floor — this introduces floor bacteria into the system.
💊 When transferring a patient — keep the drainage bag below their waist the entire time. Hand it to the patient to hold while they transfer, or hook it on the lower bed rail.
U — Urine Monitoring
Monitor output, color, clarity, and odor every shift
Normal urine output: ≥30 mL/hr (or ≥0.5 mL/kg/hr). Less than 30 mL/hr = oliguria → notify provider.
What to assess and document:
• Amount — measure and record every shift or per order
• Color — pale yellow (normal) to dark amber (concentrated/dehydrated)
• Clarity — clear (normal) vs cloudy (possible infection or sediment)
• Odor — mild (normal) vs foul/strong (possible infection)
• Sediment — presence may indicate infection or crystal formation
💊 Cloudy urine + foul odor + patient with fever = possible CAUTI. Obtain urine culture (before antibiotics), notify provider, reassess catheter necessity.
T — Tubing Kink-Free
Ensure unobstructed drainage at all times
Kinked or blocked tubing prevents urine from draining → urine stagnates in the bladder → bacteria multiply → CAUTI. Check tubing with every patient interaction.
Common kink locations: under the patient's leg, between the mattress and bed rail, coiled on the bed. Secure tubing with clip to sheet or patient gown — prevents dependent loops that block drainage.
I — Insertion Technique and Daily Perineal Care
Sterile insertion + daily cleaning
Sterile technique during insertion prevents introducing bacteria at the time of placement. Daily perineal care prevents colonization from spreading up the catheter after insertion.
Daily perineal care: Clean the catheter and perineum with soap and water at least once daily and after any bowel movement. Clean from the meatus outward along the catheter — not back and forth. Do not use povidone-iodine or antimicrobial solutions routinely — they don't reduce CAUTI and can cause mucosal irritation.
💊 Clean the catheter with soap and water, wiping away from the body — meatus outward. Never back-and-forth motion that would push bacteria toward the meatus.
Daily Reassessment
Question the catheter every single day
Every day the catheter remains in place, ask: "Does this patient still meet an appropriate indication for catheterization?" If the answer is no — advocate for removal.
Many hospitals have nurse-driven catheter removal protocols — nurses can remove catheters that no longer meet criteria without waiting for a physician order. Know your facility's protocol.
The best CAUTI prevention is catheter removal.
💊 "Why does this patient still have a catheter?" — Ask this every morning. If you can't answer it with a clinical reason — it probably should come out.
📌 NCLEX Application
Catheter care and CAUTI prevention are high-yield NCLEX topics.
Key NCLEX facts:
• Drainage bag always BELOW bladder — never on floor
• Closed system — never disconnect without a specific reason and order
• Urine specimen via needleless sampling port — never open the junction
• Advance catheter 1–2 inches past first urine return before inflating balloon
• Inflate in urethra = pain + urethral injury (do not do this)
• Output <30 mL/hr = notify provider
• Smallest appropriate catheter size
• Daily perineal care with soap and water
• Straight catheter preferred over Foley when possible
Classic NCLEX question: "A nurse needs to obtain a urine specimen from a patient with an indwelling catheter. What is the correct action?" → Clean the needleless port with alcohol, aspirate with sterile syringe. Never open the drainage system.
⚠️ The Trap — Elevating the Drainage Bag During Transfer
This happens constantly and is consistently missed as a CAUTI risk factor. During patient transfer — from bed to chair, bed to stretcher, or ambulation — the drainage bag is temporarily held at waist or chest level.
Even a brief period of the bag above bladder level allows urine to flow retrograde (backward) from the bag back into the bladder. That urine has been sitting in the bag and may contain bacteria.
During ALL transfers, the drainage bag must remain below the patient's bladder. If the patient is sitting or standing, the bag goes to their side below waist level — not carried at chest height by the nurse walking alongside.