Journal article
In vitro evaluation of the 18 and 36 kg Securos Cranial Cruciate Ligament Repair System
Veterinary surgery, Vol.34(3), pp.283-288
Submitted August 2004; Accepted February 2005
2005
PMID: 16115086
Abstract
Objective
To evaluate the mechanical properties of the 18 and 36kg Securos Cranial Cruciate Ligament Repair System™.
Study Design
In vitro mechanical evaluation.
Sample Population
Loop constructs of 18, 27, and 36 kilogram test (kgt) nylon leader line (NLL) secured with Securos® crimp–clamps (SCC, n=40 per NLL test weight) or by a clamped square knot (CSK; n=40/NLL test weight).
Methods
The 36kg SCC were used for the 27 and 36kgt NLL, and 18kg SCC were used for the 18kgt NLL. Loop constructs were mounted on a material testing machine, and distracted at 500mm/min for static tests, and for cyclic tests at 500 mm/min to a distraction limit of 6mm (18kgt) or 7.5mm (27 and 36kgt) for 49 cycles, until failure. Constructs were tested at 20°C except for 1 group of 27kgt CSK loops tested at 40°C. Load at failure, elongation, and stiffness was recorded and compared between groups under static or cyclic testing conditions.
Results
All 27 and 36kgt loops failed by disruption of NLL contained within the knot or crimp–clamp, whereas 18kgt SCC loops failed by the NLL pulling through the crimp-clamp. The 18kg SCC loops had considerable variability in ultimate load and elongation (coefficient of variation 29.6% and 18.3%, respectively). There was no significant difference in elongation between 27.3kgt CSK loops tested at 20°C and 40°C. Generally, in both static and cyclic testing, SCC constructs formed with 27.3 or 36.4kgt NLL performed as well or better than CSK constructs, resulting in loops that were strong, underwent minimal elongation, and had high stiffness.
Conclusion
The results support use of the 36kg Securos® system but not the 18kg Securos® system (with the clamp and crimping device used). The significantly lower load required for failure, slippage through the clamp, and substantial variability suggested that the crimp tube diameter or the crimping device tested may be inappropriate for use with 18kgt NLL.
Clinical Relevance
Surgeons should be aware that crimp–clamp design is important in controlling suture slippage or breakage within the clamp, and that novel systems should undergo mechanical testing with the size suture material they are intended to secure before clinical use.
Details
- Title
- In vitro evaluation of the 18 and 36 kg Securos Cranial Cruciate Ligament Repair System
- Authors/Creators
- Max N. Banwell - Louisiana State UniversitySharon C. Kerwin - Louisiana State UniversityGiselle Hosgood - Louisiana State UniversityCheryl S. Hedlund - Louisiana State UniversityJohn B. Metcalf - From the Department of Veterinary Clinical Sciences, Louisiana State University, School of Veterinary Medicine, Baton Rouge, LA
- Publication Details
- Veterinary surgery, Vol.34(3), pp.283-288
- Publisher
- Blackwell Science Inc
- Edition
- Submitted August 2004; Accepted February 2005
- Number of pages
- 6
- Identifiers
- 991005592656007891
- Copyright
- © 2005 by The American College of Veterinary Surgeons
- Murdoch Affiliation
- School of Veterinary Medicine
- Language
- English
- Resource Type
- Journal article
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