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Udgivet

Histology and Function of the Rectus Abdominis Muscle in Patients With Incisional Hernia

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Vis graf over relationer

BACKGROUND: The aim of the current study was to examine different features of the rectus abdominis muscle (RA) in patients with and without a midline incisional hernia to characterize the effects of a hernia on abdominal wall skeletal muscle.

MATERIAL AND METHODS: RA tissue from patients undergoing surgical repair of a large midline incisional hernia (n = 18) was compared with that from an intact abdominal wall in patients undergoing colorectal resection for benign or low-grade malignant disease (n = 18). In addition, needle biopsies were obtained from the vastus lateralis muscle (VL) of all subjects. Outcome measures were muscle fiber type and size, preoperative truncal flexion strength and leg extension power measured in strength-measure equipment, and RA cross-sectional area measured by computed tomography.

RESULTS: In both the RA and VL, the fiber cross-sectional area was greater in the patients with a hernia. The RA cross-sectional area correlated significantly with the truncal flexion strength (r = 0.44, P = 0.015). Patients in the hernia group had a significantly reduced ratio between truncal flexion strength and RA cross-sectional area compared with the control group (41.3 ± 11.5 N/cm2versus 51.2 ± 16.3 N/cm2, P = 0.034).

CONCLUSIONS: Anatomical displacement of the RA and lack of medial insertion in the linea alba rather than dysfunction secondary to alteration of muscle fiber structure may contribute to impairment of abdominal wall function in patients with midline incisional hernias. The study was registered at http://www.clinicaltrials.gov/(NCT02011048).

OriginalsprogEngelsk
TidsskriftThe Journal of surgical research
Vol/bind253
Sider (fra-til)245-251
Antal sider7
ISSN0022-4804
DOI
StatusUdgivet - sep. 2020

Bibliografisk note

Copyright © 2020 Elsevier Inc. All rights reserved.

ID: 61703107