Mechanical and histological characterization of the abdominal muscle. A previous step to modelling hernia surgery.
نویسندگان
چکیده
The aims of this study are to experimentally characterize the passive elastic behaviour of the rabbit abdominal wall and to develop a mechanical constitutive law which accurately reproduces the obtained experimental results. For this purpose, tissue samples from New Zealand White rabbits 2150±50 (g) were mechanically tested in vitro. Mechanical tests, consisting of uniaxial loading on tissue samples oriented along the craneo-caudal and the perpendicular directions, respectively, revealed the anisotropic non-linear mechanical behaviour of the abdominal tissues. Experiments were performed considering the composite muscle (including external oblique-EO, internal oblique-IO and transverse abdominis-TA muscle layers), as well as separated muscle layers (i.e., external oblique, and the bilayer formed by internal oblique and transverse abdominis). Both the EO muscle layer and the IO-TA bilayer demonstrated a stiffer behaviour along the transversal direction to muscle fibres than along the longitudinal one. The fibre arrangement was measured by means of a histological study which confirmed that collagen fibres are mainly responsible for the passive mechanical strength and stiffness. Furthermore, the degree of anisotropy of the abdominal composite muscle turned out to be less pronounced than those obtained while studying the EO and IO-TA separately. Moreover, a phenomenological constitutive law was used to capture the measured experimental curves. A Levenberg-Marquardt optimization algorithm was used to fit the model constants to reproduce the experimental curves.
منابع مشابه
Laparoscopic Management of Strangulated Broad Ligament Hernia
Introduction: Broad ligament hernia was first reported post-autopsy by Quain in 1861. In a 1995 review article, only 61 cases had ever been reported. This paper presents a case report of broad ligament hernia and explores the literature surrounding this topic. Case Presentation: The patient presented with no significant past medical history, acute lower a...
متن کاملReconstruction with latissimus dorsi, external abdominal oblique and cranial sartorius muscle flaps for a large defect of abdominal wall in a dog after surgical removal of infiltrative lipoma
This animal was presented with a large-sized infiltrative lipoma in the abdominal wall that had been noted for 4 years. This lipoma was confirmed by histological examination from a previous biopsy, and the infiltrative features were identified by a computerized tomography scan. The surgical removal created a large-sized abdominal defect that was closed by a combination of latissimus dorsi and e...
متن کاملThe Many Guises of Endometriosis: Giant Abdominal Wall Endometriosis Masquerading as An Incisional Hernia
Endometriosis is defined by the presence of ectopic endometrial tissue outside the uterine cavity. Despite being a lead cause of chronic pelvic pain and infertility, its clinical presentation can vary, leading to diagnostic and therapeutic challenges. Extra-pelvic endometriosis is particularly difficult to diagnose owing to its ability to mimic other conditions. Endometrial tissue in a surgical...
متن کاملThe Role of Cremaster Muscle as a Cause of Ascending Testis after Inguinal Hernia/Hydrocele Repair
Background Ascending testis (AT) is one of the rare but serious complication that may occurs following inguinal hernia/hydrocele repair. We aimed to review our more than 7 years’ experience and discuss the possible mechanism through which the AT possibly occurs following inguinal hernia/hydrocele repair. Materials and Methods A retrospective analysis of 7,212 boys who had undergone inguinal her...
متن کاملReversibility of abdominal wall atrophy and fibrosis after primary or mesh herniorrhaphy.
OBJECTIVE To determine whether primary or mesh herniorrhaphy reverses abdominal wall atrophy and fibrosis associated with hernia formation. BACKGROUND We previously demonstrated that hernia formation is associated with abdominal wall atrophy and fibrosis after 5 weeks in an animal model. METHODS A rat model of chronic incisional hernia was used. Groups consisted of uninjured control (UC, n ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of the mechanical behavior of biomedical materials
دوره 4 3 شماره
صفحات -
تاریخ انتشار 2011