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1. Comparative Efficacy Of Polypropylene And Polyester Mesh For The Repair Of Abdominal Wall Defect In Pigeons

by Muhammad Naveed Ali (2007-VA-114) | Dr. Hamad Bin Rashid | Prof. Dr. Muhammad Arif Khan | Dr. Asim Khalid Mahmood.

Material type: book Book; Literary form: not fiction Publisher: 2016Dissertation note: Polypropylene is a widely used biomaterial for the treatment of ventral abdominal wall hernias. It exhibit pain, prominent inflammatory response and foreign body reaction. Polyester (Polyethylene terephthalate) is hydrophilic material works with body’s natural systems to improve tissue integration while reducing negative foreign material response. Polyester offers extremely lower pain intensity and less foreign body reaction. The purpose of designated research was to compare the efficacy of polypropylene and polyester meshes for the treatment of abdominal defect. Both are non-absorbable meshes. Polypropylene mesh is available in Pakistan with the trade name of Prolene® (Ethicon,Johnson & Johnson, USA). Polyester mesh is not available inPakistan and was acquired from Al Zahrawi Medical, a local healthcare company in Dubai, United Arab Emirates. Polyester mesh is available with brandname of (Parietex®, Covidien, France). The experimental study was conducted on 16 (sixteen) healthy pigeons presented for massive abdominal defect repair. All birds were thoroughly examined to rule out any other anomaly before study. The birds were allocated into two different groups, viz. Group A and Group B with 8 birds in each group respectively. All treatments were administered intramuscularly using 1 ml insulin syringe. The Polypropylene mesh (Prolene®, Ethicon) was used for the treatment of abdominal repair for group A. The birds of group B was treated with Polyester mesh (Parietex®, Covidien). Ventral abdominal wall repair was performed in both groups using Polypropylene and Polyester mesh respectively. The surgery was performed at Surgery Section, Department of CMS, UVAS, Lahore for 3 months duration (including adaptation and postoperative period). Both meshes were compared on the basis of postoperative complications (wound healing, pain evaluation, hematoma, seroma and abscess formation), inflammatory responses and adhesion formation after application of mesh fixation. During experiment, it was observed that polypropylene mesh resulted in a prominent pain sensation, persistent inflammatory reaction, proliferating fibroblast, more granulating tissue, macrophages appearance, increased connective tissue thickness and proliferating collagen fibre. It was observed that Polyester mesh resulted in less pain sensation, no foreign body reaction, no neutrophil appearance and rare granulating tissue. Polyester mesh showed remarkable advantages over polypropylene mesh in terms lower pain level, reduced size seroma and extremely less scar tissue formation. Based upon all the findings it was concluded that polyester mesh is safer and more effective in terms of post-operative complications and outcomes. Availability: Items available for loan: UVAS Library [Call number: 2495-T] (1).

2. Treatment Of Long Oblique Tibial Fracture With Intramedullary Pin Alone And Full Cerclage Wires In Cats

by Syed Muhammad Faheem Ahmed (2010-VA-147) | Dr. Ayesha Safdar | Prof. Dr. Muhammad Arif Khan | Dr. Muhammad Zahid Tahir.

Material type: book Book; Literary form: not fiction Publisher: 2017Dissertation note: Fracture of long bone in animals is a challenging problem these days. Leg fractures in cats are quite common problem. Fractures treated with biomechanically sound fixation and proper attention to soft tissues will be most likely to heal with a functional outcome. However, osteomyelitis, bone sequestration, and joint ankylosis still continue to be major factors in inhibiting healing and bone functionality. This research project was designed with the aim to test the effectiveness and accuracy of three sets of bone splintage devices in healing long oblique mid-shaft tibial fractures in cats, with minimal side effects and stress to the patient. For the study total twelve adult cats as and when presented at Pet Centre, University of Veterinary & Animal Sciences Lahore, and Saleem Veterinary Clinic and petshop Lahore, having long oblique fracture of tibia irrespective of breed, sex and considering almost similar age group, both stray and domesticated were selected. These cats were divided into three groups i.e groups A, B and C comprising of four cats in each group, and designated as 1, 2 3 and 4 respectively. They were admitted as clinical trial patients and were kept in separate cat cages at Saleem Veterinary Clinic until the completion of the study. Specific tagged collars were applied on all the cats. They were kept under comfortable environment and on a standard commercially available cat feed diet with ad labitum access to water. All the cats of three groups, having long oblique tibial fracture were treated with 3 separate techniques for comparison. In group A, fracture was reduced and immobilized with intramedullary pinning. In group B, fracture was treated with full cerclage wires alone while cats of group C were treated with intramedullary pin and cerclage wires. Thus comparative fracture healing and efficacy of individual techniques in their respective cases were evaluated. Subsequent comparative parameters were studied which included physical examination of wound, lameness grading, radiological scoring for callus formation, fracture line union, fracture alignment as well as callus remodelling. The collected data regarding study parameters were illustrated by descriptive statistics and non-parametric analysis of variance (Kruskal Walis Test) using IBM SPSS Statistics version 20. Conclusion: Therefore, as advocated by the results of this study, intramedullary pinning (preferably threaded) with at least 2 - 3 full cerclage wiring was a better choice for the correction of a long oblique mid-shaft tibial fracture in cats. The combination of both these techniques together give a strong backbone for bone healing to take place with minimum amount of stress to the bone fragments and also to counteract different forces acting on the fracture site.Both these techniques were easy, required little soft tissue manipulation, were cost-effective, required less equipment and could easily be applied by an average practitioner. Availability: Items available for loan: UVAS Library [Call number: 2891-T] (1).

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