The effect of number of throws on knot security with nonidentical sliding knots

Am J Obstet Gynecol. 2004 Nov;191(5):1618-20. doi: 10.1016/j.ajog.2004.05.029.

Abstract

Objective: The study was undertaken to test the integrity of nonidentical sliding knots made with 3 throws compared with those made with 6 throws with monofilament and braided absorbable suture.

Study design: The 3 throw nonidentical sliding knot was compared with the 6 throw nonidentical sliding knot in 4 different suture groups. The groups were 0-0 polydioxanone, 2-0 polydioxanone, 0-0 polyglactin 910, and 2-0 polyglactin 910. Knots were tested to failure with a tensiometer. The proportion of 3 throw knots becoming untied was compared with the 6 throw knot within each group. Ultimate load required to break tied knots within each suture group was also evaluated.

Results: The 3 throw knots had very high rates of knot failure and untied significantly more often than the 6 throw knots.

Conclusion: The 6 throw nonidentical sliding knot demonstrates superior knot integrity compared with the 3 throw knot with both monofilament and braided absorbable suture.

Publication types

  • Evaluation Study

MeSH terms

  • Female
  • Gynecologic Surgical Procedures / methods*
  • Humans
  • Polydioxanone
  • Polyglactin 910
  • Suture Techniques*
  • Sutures*
  • Tensile Strength

Substances

  • Polydioxanone
  • Polyglactin 910