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Minimum number of throws needed for knot security.

Publication ,  Journal Article
Muffly, TM; Kow, N; Iqbal, I; Barber, MD
Published in: J Surg Educ
2011

OBJECTIVE: The purpose of the study was to determine the optimal number of throws to ensure knot security. STUDY DESIGN: Knots were tied with 3, 4, 5, or 6 square throws with 0-gauge coated polyester, polydioxanone, polypropylene, and polyglactin 910. The suture was soaked in 0.9% sodium chloride and subsequently transferred to a tensiometer and broken. RESULTS: A total of 225 knots were tied. Regardless of the suture type, tension at failure for knots with 4 throws, 5 throws, and 6 throws was higher than tension at failure of knots with only 3 throws (p < 0.05 for each). We found no difference in the tensile strength between knots with 4, 5, or 6 throws (p > 0.05 for each). Knots with 4 throws were significantly more likely to come untied than knots with 5 or 6 throws (p < 0.01). CONCLUSIONS: Under laboratory conditions, the ideal knot has 5 throws to maximize tensile strength and rate of untying. This finding does not seem to vary by type of suture material.

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Published In

J Surg Educ

DOI

EISSN

1878-7452

Publication Date

2011

Volume

68

Issue

2

Start / End Page

130 / 133

Location

United States

Related Subject Headings

  • Tensile Strength
  • Sutures
  • Suture Techniques
  • Surgical Wound Dehiscence
  • Surgery
  • Sensitivity and Specificity
  • Safety Management
  • Materials Testing
  • Humans
  • 1302 Curriculum and Pedagogy
 

Citation

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Muffly, T. M., Kow, N., Iqbal, I., & Barber, M. D. (2011). Minimum number of throws needed for knot security. J Surg Educ, 68(2), 130–133. https://doi.org/10.1016/j.jsurg.2010.11.001
Muffly, Tyler M., Nathan Kow, Imran Iqbal, and Matthew D. Barber. “Minimum number of throws needed for knot security.J Surg Educ 68, no. 2 (2011): 130–33. https://doi.org/10.1016/j.jsurg.2010.11.001.
Muffly TM, Kow N, Iqbal I, Barber MD. Minimum number of throws needed for knot security. J Surg Educ. 2011;68(2):130–3.
Muffly, Tyler M., et al. “Minimum number of throws needed for knot security.J Surg Educ, vol. 68, no. 2, 2011, pp. 130–33. Pubmed, doi:10.1016/j.jsurg.2010.11.001.
Muffly TM, Kow N, Iqbal I, Barber MD. Minimum number of throws needed for knot security. J Surg Educ. 2011;68(2):130–133.
Journal cover image

Published In

J Surg Educ

DOI

EISSN

1878-7452

Publication Date

2011

Volume

68

Issue

2

Start / End Page

130 / 133

Location

United States

Related Subject Headings

  • Tensile Strength
  • Sutures
  • Suture Techniques
  • Surgical Wound Dehiscence
  • Surgery
  • Sensitivity and Specificity
  • Safety Management
  • Materials Testing
  • Humans
  • 1302 Curriculum and Pedagogy