TY - JOUR

T1 - An experimental animal model for abdominal fascia healing after surgery

AU - Burcharth, Jakob

AU - Pommergaard, H. C.

AU - Klein, M.

AU - Rosenberg, J.

PY - 2013/11

Y1 - 2013/11

N2 - Background: Incisional hernia (IH) is a well-known complication after abdominal surgical procedures. The exact etiology of IH is still unknown even though many risk factors have been suggested. The aim of this study was to create an animal model of a weakly healed abdominal fascia that could be used to evaluate the actively healing fascia. Such an animal model may promote future research in the prevention of IH. Methods: 86 male Sprague-Dawley rats were used to establish a model involving six experiments (experiments A-F). Mechanical testing of the breaking strength of the healed fascia was performed by testing tissue strips from the healed fascia versus the unincised control fascia 7 and 28 days postoperatively. Results: During the six experiments a healing model was created that produced significantly weaker coherent fascia when compared with the control tissue measured in terms of mechanical breaking strength. This new animal model employed myofascial closing after a full thickness abdominal incision using a running suture with fast-absorbable suture material. This technique produced a weak myofascial layer compared with the control tissue measured in terms of breaking strength after both 7 and 28 days. Conclusion: It was possible to create a healed but weak abdominal fascia in rats with a minimum of defects after incision using a running suture technique in the fascia. In contrast to other models, regular tissue defects were absent, and the model can therefore be used to evaluate the changes, both histological and mechanical, in the actively healing fascia, which may lead to incisional herniation. Furthermore, the model may also be used to study interventions performed to promote healing. This contrasts with existing models with regular fascia defects, which are not well suited for this purpose.

AB - Background: Incisional hernia (IH) is a well-known complication after abdominal surgical procedures. The exact etiology of IH is still unknown even though many risk factors have been suggested. The aim of this study was to create an animal model of a weakly healed abdominal fascia that could be used to evaluate the actively healing fascia. Such an animal model may promote future research in the prevention of IH. Methods: 86 male Sprague-Dawley rats were used to establish a model involving six experiments (experiments A-F). Mechanical testing of the breaking strength of the healed fascia was performed by testing tissue strips from the healed fascia versus the unincised control fascia 7 and 28 days postoperatively. Results: During the six experiments a healing model was created that produced significantly weaker coherent fascia when compared with the control tissue measured in terms of mechanical breaking strength. This new animal model employed myofascial closing after a full thickness abdominal incision using a running suture with fast-absorbable suture material. This technique produced a weak myofascial layer compared with the control tissue measured in terms of breaking strength after both 7 and 28 days. Conclusion: It was possible to create a healed but weak abdominal fascia in rats with a minimum of defects after incision using a running suture technique in the fascia. In contrast to other models, regular tissue defects were absent, and the model can therefore be used to evaluate the changes, both histological and mechanical, in the actively healing fascia, which may lead to incisional herniation. Furthermore, the model may also be used to study interventions performed to promote healing. This contrasts with existing models with regular fascia defects, which are not well suited for this purpose.

KW - Animal model

KW - Incisional hernia

KW - Surgery

KW - Translational research

KW - Wound failure

UR - http://www.scopus.com/inward/record.url?scp=84889659273&partnerID=8YFLogxK

U2 - 10.1159/000353970

DO - 10.1159/000353970

M3 - Journal article

C2 - 23969725

AN - SCOPUS:84889659273

VL - 51

SP - 33

EP - 40

JO - European Surgical Research

JF - European Surgical Research

SN - 0014-312X

IS - 1-2

ER -