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Morphological and functional evaluation of leg-muscle reinnervation after coupler coaptation of the divided rat sciatic nerve
Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Division of surgery.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Division of surgery. Östergötlands Läns Landsting, Reconstruction Centre, Department of Plastic Surgery, Hand surgery UHL.
2005 (English)In: Microsurgery, ISSN 0738-1085, E-ISSN 1098-2752, Vol. 25, no 3, 235-240 p.Article in journal (Refereed) Published
Abstract [en]

Mechanical couplers are successfully used for microvascular venous anastomoses. The advantages include a simple and fast technique and a high patency rate. Couplers offer a secluded coaptation site, and might also be of use in peripheral nerve repair. The present study was designed to investigate coupler coaptation of the rat sciatic nerve, evaluating the number and locations of motor and sensory neurons projecting to the selected muscles as well as stimulation-induced muscle contraction force. Adult rats underwent either suture or coupler repair after left sciatic nerve transection. In all rats, the experimental side was compared to the healthy right side. Evaluation after 20 weeks included retrograde labeling of motoneurons and dorsal root ganglion neurons projecting to the tibial anterior muscle and to the tibial posterior muscle, histology, muscle contraction force (tibial anterior muscle and gastrocnemius muscle), and a pinch reflex test. The results show that the suture and the coupler groups did not differ significantly regarding the examined parameters, except for discrete signs of nerve compression at the coaptation site after coupler repair due to fibrous tissue ingrowth. However, this did not impair axonal regeneration. Importantly, axonal outgrowth from the repair site to the surrounding tissue was not observed after coupler coaptation, but it was observed after suture repair. These results suggest that couplers may be of value for repair of nerves in adjacency to avoid axonal crisscrossing between nerves during regeneration. © 2005 Wiley-Liss, Inc.

Place, publisher, year, edition, pages
2005. Vol. 25, no 3, 235-240 p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-31653DOI: 10.1002/micr.20102Local ID: 17462OAI: oai:DiVA.org:liu-31653DiVA: diva2:252476
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13

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Lutz, BarbaraLidman, Disa

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Faculty of Health SciencesDivision of surgeryDepartment of Plastic Surgery, Hand surgery UHL
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