An approximation method for the prevention of knot formation during catheterization in children

Introduction Knotting during urethral catheterization in children is an unpleasant situation. We aimed to minimize this risk. Method To prevent knot formation, we must understand its nature. We focused on the simplest, and most fundamental, known as overhand knot. Results Calculating the maximum length of catheter inser-ted in the bladder without risk of knotting, we estimated the minimum length of catheter needed for an overhand knot. Discussion This theoretical approach provides a rough estima-tion which may contribute to secure catheterization. Conclusion Adding the calculated length to the appropriate for gender and age urethral length, may reduce knotting risk.

Automated summary

This study aims to minimize knotting during urethral catheterization in children. To prevent knot formation, the nature of knots, specifically the overhand knot, must be understood. By calculating the maximum length of catheter inserted in the bladder without risk of knotting, the minimum length of catheter needed for an overhand knot was estimated. This theoretical approach provides a rough estimation that may contribute to secure catheterization. Adding the calculated length to the appropriate urethral length for gender and age may reduce the risk of knotting.