Last Updated on August 19, 2026
Indications & Contraindications
Indications | Contraindications |
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Equipment
Foley’s catheter
Lubricant gel
Foley’s Catheter
• Material: latex / silicone
• 2-way or 3-way catheter
Size
Size of urinary catheter in children
• <3 kg: 4 Fr
• >3 kg: 6 Fr
• Older children: 6 – 10 Fr
Urinary Catheter Insertion Steps
Video(s)
Complications
Symptoms / signs related to complications
• Haematuria ≈ urethral injury after traumatic urinary catheter insertion
• Urinary leakage after urinary catheter insertion ≈ blocked urinary catheter
During / Post Insertion
•
Catheter knot
Avoid using Ryles tube as urinary catheter, because Ryles tube can coil easily
• Paraphimosis
• Urethral injury → haematuria
• Blocked urinary catheter → urinary leakage
• Urinary tract infection
• Bladder neck necrosis
During removal
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Non-deflating balloon
Management:
• Can try first with 2 – 5 mL of Liquid Paraffin, injected into the balloon, wait for 30 minutes.
• Parraffin would dissolve the balloon wall and the balloon would rupture
Post removal
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Urethral injury
This happens when balloon is not deflated completely prior to removal of urinary catheter Abbreviation: UTI Urinary tract infection ===== 💡Remember If Urine FEME / Urine dipstick shows feature of UTI (leucocyte positive, nitrite positive), do renal punch to look for sign of pyelonephritis
• Acute urinary retention
•
UTI
• Urethral stricture / obstruction
• Meatal stenosis
Clamping
×Beware, part of the content in this section is solely experience-based rather than evidence-based
of Urinary Catheter
Beware, part of the content in this section is solely experience-based rather than evidence-based
I’m sure sometimes you might have encountered this plan given during ward round: “Clamp CBD 4 hourly until tomorrow morning.”
Tips / Reminder
During insertion
• Apply adequate of gel during urinary catheter insertion, to reduce discomfort during & post insertion
• Remember to put back male foreskin after inserting urinary catheter
• Use water for injection (not NaCl) to inflate the balloon
• Use 10 mL water for injection to ensure the balloon inflated adequately
During removal
• If resistance is encountered during removal of urinary catheter, do not proceed to pull, as this would injure the bladder neck / urethra
Questions & Answers
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