Evaluation of knotted suture threads from the view point of tension and elongation by using a developed testing machine

Kensuke Oda, Hayata Sakai, Kouhei Ohnishi, Eiji Kobayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, knotted suture threads for microsurgery are evaluated from the view point of tension and elongation by using a developed testing machine. The suture threads for microsurgery are thin and easy to rupture. That makes a suture difficult. If a surgeon pulls the thread too strong when he or she makes a knot, it will rupture. On the other hand, if a surgeon pulls it too weak, it will become untied. Therefore, we want to know the mechanical properties of the thread with a knot. That will be a reference when a surgeon handle the thread or when a microsurgery support robot is designed. While a surgeon makes a knot, there are two chances to rupture the thread; when he or she forms the first throw or the second throw. To measure the mechanical properties of the first throw, an initial throw of a surgeon's knot is used in this paper. Also, to measure the mechanical properties of the second throw, a square knot is used. The measurement of the thread is conducted by using a developed testing machine. Reaction force observer (RFOB) is implemented in the machine to measure tension and elongation of the thread at the same time. Tension control is implemented to pull the thread from both sides that is similar to the operation which surgeons do. The result shows a thread with a square knot is weaker than the first throw of a surgeon's knot.

Original languageEnglish
Title of host publicationProceedings - 2017 IEEE International Conference on Mechatronics, ICM 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages105-110
Number of pages6
ISBN (Electronic)9781509045389
DOIs
Publication statusPublished - 2017 May 6
Event2017 IEEE International Conference on Mechatronics, ICM 2017 - Gippsland, Australia
Duration: 2017 Feb 132017 Feb 15

Other

Other2017 IEEE International Conference on Mechatronics, ICM 2017
CountryAustralia
CityGippsland
Period17/2/1317/2/15

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Keywords

  • microsurgery
  • reaction force observer
  • suture thread
  • tension control
  • testing machine

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization

Cite this

Oda, K., Sakai, H., Ohnishi, K., & Kobayashi, E. (2017). Evaluation of knotted suture threads from the view point of tension and elongation by using a developed testing machine. In Proceedings - 2017 IEEE International Conference on Mechatronics, ICM 2017 (pp. 105-110). [7921088] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICMECH.2017.7921088