scholarly journals Acellular dermal graft for repair of abdominal wall defects in rabbits

2006 ◽  
Vol 77 (2) ◽  
Author(s):  
A.K. Gangwar ◽  
A.K. Sharma ◽  
Naveen Kumar ◽  
N. Kumar ◽  
S.K. Maiti ◽  
...  
Keyword(s):  
Abdominal Wall ◽  
Abdominal Wall Defect ◽  
Test Group ◽  
Control Group ◽  
Abdominal Wall Defects ◽  
Full Thickness ◽  
Dermal Graft ◽  
Group I ◽  
Group A ◽  
Acellular Dermal

Sixteen clinically healthy New Zealand white rabbits of either sex were divided into 2 equal groups (I and II) of 8 animals each. Under thiopental sodium (2.5 %) anaesthesia a 2 × 3 cm full-thickness abdominal wall defect in the mid-ventral abdominal wall was created and repaired with an acellular dermal graft (ADG) in all the animals of group I (test group). In animals of group II (control group) a full-thickness linear midline abdominal muscular wall incision was made and repaired with a continuous suture pattern using 2-0 nylon.

scholarly journals Use of alloplastic meshes in abdominal wounds of rats with induced peritonitis

2014 ◽  
Vol 27 (1) ◽  
pp. 26-29 ◽  
Author(s):  
Rafael Calvão BARBUTO ◽  
Ivana DUVAL-ARAUJO ◽  
Sumara Marques BARRAL ◽  
Raphael Grossi ROCHA ◽  
Cristiane de Souza BECHARA ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Abdominal Wall ◽  
Granulation Tissue ◽  
Abdominal Wall Defect ◽  
Test Group ◽  
Microscopic Analysis ◽  
Female Rats ◽  
Control Group ◽  
Abdominal Wall Defects ◽  
Wall Defect

Background : The use of alloplastic meshes has been historically contra-indicated in patients with infection. Aim : To evaluate the use of polypropylene meshes in the treatment of abdominal wall defects in rats with peritonitis. Methods : Twenty Wistar female rats were divided into two groups: induction of peritonitis (test group) and without peritonitis (control group). An abdominal wall defect was created in all animals, and polypropylene mesh was applied. The evaluation of the tensile strength of the mesh was carried out using tensiometer and microscopic analysis of the healing area was done. Results : More adhesion of the mesh to the rat abdominal wall was observed in test group. The histopathological analyses showed prevalence of moderate to accentuated granulation tissue in both groups, without significant differences. Conclusion : The use of the mesh coverage on abdominal wall defects of rats with induced peritonitis did not show worse results than its use in healthy animals, nor was its integration to the resident tissue any worse.

scholarly journals Abdominal wall repair with human acellular dermal autograft

2011 ◽  
Vol 2 (1) ◽  
pp. 6
Author(s):  
Roel E. Genders ◽  
Paul P.G.M. Kouwenberg ◽  
Rob P. Bleichrodt
Keyword(s):  
Abdominal Wall ◽  
Abdominal Wall Defect ◽  
Operative Procedure ◽  
Abdominal Wall Defects ◽  
Dermal Matrix ◽  
Wall Defect ◽  
Mortality And Morbidity ◽  
Acellular Dermis ◽  
Number Of Patients ◽  
Acellular Dermal

Repair of abdominal wall defects in the presence of contamination or infection is a significant problem. The loss of tissue warrants enforcement of the abdominal wall, preferably by autologous material. However, autologous repair often requires extensive surgery. This paper presents a review of available literature of placement of an acellular human dermis to repair an abdominal fascia defect, in contaminated as well as in non-contaminated surgical fields. It is illustrated with a case report that describes the successful reconstruction of an infected abdominal wall defect with a human acellular dermis allograft. A systematic literature review was undertaken with searches performed in the Pubmed and Cochrane databases for the period up till March 2009, using the search terms <em>Alloderm</em> [Substance Name], <em>Hernia</em> [Mesh] and the key words <em>acellular dermis, acellular dermal matrix, human acellular dermal allograft </em>and <em>abdominal wall defect</em>. To assess methodological quality, each article was subjected to a modification of the methodological index for non-randomized studies (MINORS) according to Slim <em>et al.</em> Two items from the original index were not included because none of the studies selected had an unbiased assessment of the study end points and in none of the studies was a prospective calculation of the study size performed. Seventeen studies were included in the review. Data were extracted regarding study design, number of patients, surgical technique, followup period, contaminated or non-contaminated area of the fascia defect, mortality and morbidity (hemorrhage, seroma, wound dehiscence, infection) of the operative procedure, the longterm results (removal of the graft, reherniation and bulging) and level of evidencey. A total of 169 short-term complications and 151 longterm complications occurred after 643 surgical procedures reconstructing both contaminated and clean abdominal wall defects by implantation of an HADA. Human acellular dermal allograft seems to be a good alternative for autologous repair of contaminated or infected abdominal wall defects.

scholarly journals Investigation of a connection between abdominal wall defects and severity of the herniation in fetuses with gastroschisis and omphalocele

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Natasha T. Logsdon ◽  
Carla M. Gallo ◽  
Luciano Alves Favorito ◽  
Francisco J. Sampaio
Keyword(s):  
Abdominal Wall ◽  
Iliac Crest ◽  
Abdominal Wall Defect ◽  
Control Group ◽  
Abdominal Wall Defects ◽  
Internal Organs ◽  
Wall Defect ◽  
Mean Values ◽  
Biometric Parameters ◽  
Post Test

AbstractAnalyze the biometric parameters and the size (area) of abdominal wall defect (AWD) in fetuses with gastroschisis and omphaloceles and correlate them with the herniated internal organs. We studied 22 fetuses (11 with AWDs and 11 without anomalies). In all fetuses we evaluated the xiphopubic distance (XPD) and iliac crest distance (ICD). In fetuses with AWDs we dissected the abdominal wall and measured the width and length of the defect for calculating its area and studying the correlation between the size of the defect with the organs that were herniated. For statistical analysis, the Anova and Tukey post-test were used (p < 0.05). The XPD in the control group had mean of 4.2 mm (2.3–5.9; SD ± 1.11), while in the AWDs it was 4.2 mm (2.9–5.5; SD ± 0.98) (p = 0.4366). The ICD had mean values of 2.5 mm (1.6–3.4; SD ± 0.58) in the control group, and 2.3 mm (1.2–3.0; SD ± 0.56) in AWDs fetuses (p = 0.6963). The number of herniate organs do not have significant correlation with the area of the defect (r2 = 0.2504, p = 0.5068). There is no correlation between the size (area) of abdominal wall defects and the number of the internal organs that herniated. Therefore, the hole size is not a predictor of the severity of the gastroschisis or omphalocele.

scholarly journals Engineering of Skeletal Muscle Tissue Using Myoblast-Seeded Bovine Pericardium for Reconstruction of Abdominal Wall Defect in a Rabbit Model

2010 ◽  
Vol 8 ◽  
pp. 9-21
Author(s):  
T. Ayele ◽  
A.B.Z. Zuki ◽  
M.M. Noordin ◽  
B.M.A. Noorjahan
Keyword(s):  
Skeletal Muscle ◽  
Treatment Group ◽  
Abdominal Wall ◽  
Muscle Tissue ◽  
Abdominal Wall Defect ◽  
Rabbit Model ◽  
Bovine Pericardium ◽  
Skeletal Muscle Tissue ◽  
Control Group ◽  
Abdominal Wall Defects

A novel tissue engineered construct was used to engineer skeletal muscle tissue for reconstruction of abdominal wall defects, which is a common challenge to surgeons, due to insufficient autogenous tissue. Myoblasts were isolated from soleus muscle fibers, seeded onto the scaffold and cultivated in vitro for 5 days. Full-thickness abdominal wall defects (3 x 4 cm) were created in 18 male New Zealand white rabbits and randomly divided into two equal groups (n=9 each). The defects of the first group were repaired with myoblast seeded bovine pericardium (treatment group) whereas the second group involved non-seeded bovine pericardium (control group). Three animals were sacrificed at 7, 14, and 30 days post-implantation from each group and the explanted specimens were subjected to macroscopic, light, fluorescence and electron microscopic analysis. In each case, the tissue engineered construct was thicker from deposition of newly formed collagen with neo-vascularisation, than the control group. Most importantly, multinucleated myotubes and myofibers were only detected in the treatment group. Therefore, this study demonstrates that myoblast-seeded bovine pericardium construct can provide a structural replacement for severe and large abdominal wall defects with profound regeneration of skeletal muscle tissues.

scholarly journals Reconstruction of full thickness abdominal wall defect following tumor resection: A case report

2014 ◽  
Vol 142 (5-6) ◽  
pp. 347-350 ◽  
Author(s):  
Predrag Kovacevic ◽  
Asen Velickov ◽  
Danilo Stojiljkovic ◽  
Aleksandra Velickov ◽  
Zoran Ceranic
Keyword(s):  
Abdominal Wall ◽  
Abdominal Wall Defect ◽  
Tumor Resection ◽  
Fascia Lata ◽  
Abdominal Wall Defects ◽  
Skin Grafts ◽  
Full Thickness ◽  
Local Skin ◽  
Wall Defect ◽  
Fascia Lata Graft

Introduction. Reconstruction of a full thickness abdominal wall defect is a demanding procedure for general and also for plastic surgeons, requiring vigorous planning and reconstruction of three layers. Case Outline. We present a case of a 70-year-old patient with a huge abdominal wall tumor with 40 years evolution. Surgery was performed under general anesthesia. Full thickness abdominal defect appeared after the tumor resection. Reconstruction followed in the same act. The defect was reconstructed using a combination of techniques, including omental flap, fascia lata graft, local skin flaps and skin grafts. After surgery no major complications were noted, only a partial skin flap loss, which was repaired using partial thickness skin grafts. The final result was described by the patient as very good, without hernia formation. Conclusion. Omenthoplasty, abdominal wall reconstruction in combination with free fascia lata graft and skin grafts can be one of good options for the reconstruction of full thickness abdominal wall defects.

scholarly journals Biomechanical Behaviour and Biocompatibility of Ureidopyrimidinone-Polycarbonate Electrospun and Polypropylene Meshes in a Hernia Repair in Rabbits

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1174 ◽  
Author(s):  
Mori da Cunha ◽  
Hympanova ◽  
Rynkevic ◽  
Mes ◽  
Bosman ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Abdominal Wall ◽  
Muscular Atrophy ◽  
Abdominal Wall Defect ◽  
Fatty Infiltration ◽  
Pelvic Organ ◽  
Abdominal Wall Defects ◽  
Full Thickness ◽  
Recurrence Rates

Although mesh use has significantly improved the outcomes of hernia and pelvic organ prolapse repair, long-term recurrence rates remain unacceptably high. We aim to determine the in vivo degradation and functional outcome of reconstructed abdominal wall defects, using slowly degradable electrospun ureidopyrimidinone moieties incorporated into a polycarbonate backbone (UPy-PC) implant compared to an ultra-lightweight polypropylene (PP) textile mesh with high pore stability. Twenty four New-Zealand rabbits were implanted with UPy-PC or PP to either reinforce a primary fascial defect repair or to cover (referred to as gap bridging) a full-thickness abdominal wall defect. Explants were harvested at 30, 90 and 180 days. The primary outcome measure was uniaxial tensiometry. Secondary outcomes were the recurrence of herniation, morphometry for musculofascial tissue characteristics, inflammatory response and neovascularization. PP explants compromised physiological abdominal wall compliance from 90 days onwards and UPy-PC from 180 days. UPy-PC meshes induced a more vigorous inflammatory response than PP at all time points. We observed progressively more signs of muscle atrophy and intramuscular fatty infiltration in the entire explant area for both mesh types. UPy-PC implants are replaced by a connective tissue stiff enough to prevent abdominal wall herniation in two-thirds of the gap-bridged full-thickness abdominal wall defects. However, in one-third there was sub-clinical herniation. The novel electrospun material did slightly better than the textile PP yet outcomes were still suboptimal. Further research should investigate what drives muscular atrophy, and whether novel polymers would eventually generate a physiological neotissue and can prevent failure and/or avoid collateral damage.

ZINC IN THE RATIONS OF CALVES

2019 ◽  
Keyword(s):  
Body Mass ◽  
Test Group ◽  
Hair Follicles ◽  
Control Group ◽  
Albumin Concentration ◽  
Zinc Compounds ◽  
Entire Duration ◽  
Zinc Salts ◽  
Group A ◽  
Hair Cortex

According to the Tambovagrochemcenter data, zinc deficiency in animal rations exceeds 33%. To de-termine the efficiency of ration additives 3 groups of calves were formed, one of which was control and received regular feed, first test group received additional Zinc Sulphate, and second test group received additional Zinc Bioplex. To assess the results, we take into account the following values: chemical com-position and nutritional values of the feed, body mass value, amount of immunoglobulins in blood, bio-chemical and hematological values of blood, morphological values of fur and skin. Noticeable results were achieved in 4 months, with first and second test groups receiving accordingly 3,15% and 6,13% more body mass increase over the control group. A tendency towards higher albumin concentration in both test groups was noted, and calves of the second test group had higher amounts of hemoglobin and higher concentrations of it per erythrocyte. In samples of epidermis and hairs of the second test group the papillary layer was well developed, with the amount of hair and hair follicles exceeding 7 in the field of view, with the thickness of hairs being at least 70 μm. Inner papilla of hair contained 6 to 8 layers of hair, thickness of awn hairs reaching 80-90 μm, down hairs reaching 40 μm, with the hair cortex making up more than 80% of the hair thickness. Thus, introducing zinc salts and chelated zinc compounds to the milk-fed calves’ ration, has resulted in monetary profit increases over the control group by 255,0 and 612,0 roubles accordingly. By all researched values, the highest results were reached from adding zinc bioplex with approximately 360 mg added per animal for the entire duration of the growth process.

scholarly journals The Bone Buttress Theory: The Effect of the Mechanical Loading of Bone on the Osseointegration of Dental Implants

Biology ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
David Chavarri-Prado ◽  
Aritza Brizuela-Velasco ◽  
Ángel Álvarez-Arenal ◽  
Markel Dieguez-Pereira ◽  
Esteban Pérez-Pevida ◽  
...  
Keyword(s):  
Dental Implants ◽  
Mechanical Loading ◽  
Bone Growth ◽  
Bone Matrix ◽  
Test Group ◽  
Control Group ◽  
Group A ◽  
Bone To Implant Contact ◽  
The Stability ◽  
Group B

Objectives: To determine the effect of mechanical loading of bone on the stability and histomorphometric variables of the osseointegration of dental implants using an experimental test in an animal model. Materials and Methods: A total of 4 human implants were placed in both tibiae of 10 New Zealand rabbits (n = 40). A 6-week osseointegration was considered, and the rabbits were randomly assigned to two groups: Group A (Test group) included 5 rabbits that ran on a treadmill for 20 min daily during the osseointegration period; Group B (Controls) included the other 5 that were housed conventionally. The monitored variables were related to the primary and secondary stability of the dental implants (implant stability quotient—ISQ), vertical bone growth, bone to implant contact (BIC), area of regenerated bone and the percentage of immature matrix. Results: The results of the study show a greater vertical bone growth (Group A 1.26 ± 0.48 mm, Group B 0.32 ± 0.47 mm, p < 0.001), higher ISQ values (Group A 11.25 ± 6.10 ISQ, 15.73%; Group B 5.80 ± 5.97 ISQ, 7.99%, p = 0.006) and a higher BIC (Group A 19.37%, Group B 23.60%, p = 0.0058) for implants in the test group, with statistically significant differences. A higher percentage of immature bone matrix was observed for implants in the control group (20.68 ± 9.53) than those in the test group (15.38 ± 8.84) (p = 0.108). A larger area of regenerated bone was also observed for the test implants (Group A 280.50 ± 125.40 mm2, Group B 228.00 ± 141.40 mm2), but it was not statistically significant (p = 0.121). Conclusions: The mechanical loading of bone improves the stability and the histomorphometric variables of the osseointegration of dental implants.

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