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Article
Management of fingertip injury in Erbil, an evaluation study
معالجة إصابة الإصبع في أربيل ، دراسة تقييمية

Authors: Rasul Hamed Awla --- Jalal Hamasalih Fattah
Journal: Zanco Journal of Medical Sciences مجلة زانكو للعلوم الطبية ISSN: 19955588/19955596 Year: 2013 Volume: 17 Issue: 3 Pages: 518-525
Publisher: Hawler Medical Univeristy جامعة هولير الطبية

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Abstract

Background and objective: Fingertip injuries are common. Out of the various available reconstructive options, one needs to select an option which achieves a painless fingertip with durable and sensate skin cover. The objective of this study was to find out the characteristics of patients, and to describe the methods of management and the proportions of complications.Methods: A prospective study of 130 cases of fingertip injuries of patients managed from March 2009 to March 2011. The data were collected through using a questionnaire. Standardized photographs and radiographs were taken. Various reconstructive options were considered for the fingertip injuries .Statistical package for social sciences (SPSS version 17) was used for data entry and analysis.Results: Crush injury (76 cases) was found to be the commonest mechanism of fingertip injury. Various reconstructive options were considered based on the preoperative evaluation. Ninety percent of reconstructions healed uneventfully. Few minor complications occurred which responded to conservative management.Conclusion: A proper evaluation of fingertip defects is necessary to choose the best possible reconstructive option to achieve best result.


Article
SLIP DETECTION FOR A SPECIFIC DESIGN OF FINGERTIP IN MULTI-DIRECTION UNDER DIFFERENT LOAD CONDITIONS

Authors: Hayder Ahmed Abdulrazzaq --- Ihsan Abdulhussein Baqer --- Mauwafak Ali Tawfik
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2019 Volume: 23 Issue: 1 Pages: 103-116
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In this paper, a novel design of robotic fingertip has been proposed to detect slippage between the robotic fingertip and the grasped object in multi-direction under different types of loads (static and dynamic loads). The detection process is based on the monitoring of variation in the normal to the tangential component of contact force ratios. The fingertip is composed of a compression springs and a conventional force sensors that are mounted to be able to measure the contact force components continuously. A mathematical model has been derived relative to a proposed design with the help of Matlab-Simulink program. Furthermore, the robotic hand mechanism contains the flexible parts to adapt the grasping force during the slippage occurrence period in spite of the hand actuator is in a stopped status. The grasped object is designed in a cube shape with two unbalance DC motors to generate an excitation that is used as an external dynamic load. The experimental results revealed that the proposed design for detecting slippage in multi-direction is feasible and effective for improving the stability of the grasping process.


Article
EVALUTION OF BILATERAL V-Y ROTATION ADVANCEMENT FLAPS FOR TREATMENT OF FINGERTIP AMPUTATION

Authors: Jabir Raheem Hameed --- Roaa Hamed Mahmood
Journal: Basrah Journal of Surgery مجلة البصرة الجراحية ISSN: 16833589 / ONLINE 2409501X Year: 2019 Volume: 25 Issue: 1 Pages: 66-73
Publisher: Basrah University جامعة البصرة

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Abstract

EVALUTION OF BILATERAL V-Y ROTATION ADVANCEMENT FLAPS FOR TREATMENT OF FINGERTIP AMPUTATION Jabir Raheem Hameed* and Roaa Hamed Mahmood@*MB, ChB, FICMS, Consultant Plastic and Reconstructive Surgeon, Al-Sadr Teaching Hospital, Basrah. @MB, ChB, Candidate of CABHS, Plastic and Reconstructive Surgery, Al-Sadr Teaching Hospital, Basrah, IRAQ. Abstract Fingertip amputation is the most common injury of the upper limb. The goals of treating it are; covering the defect, achieve sensibility, preserving the length of the finger by using durable coverage, obtaining the satisfactory aesthetic appearance and allow the patient for faster return to work. This study aimed to evaluate the use of bilateral V-Y rotation advancement flaps for the management of fingertip amputations with exposed bones and to assess the functional and aesthetic outcome. Between January 2017 and August 2018, bilateral V-Y rotation advancement flaps was performed on eleven male patients, average age 32 years, whose fingertip amputation with variable planes and zones. Patients were followed-up for at least 6-12 months. Twenty two flaps were made on 11 fingers, there was no partial or total flap loss. Patients had neither cold intolerance nor scar hypersensitivity, no obvious hook nail deformity apart of one patient. Because flap have neurovascular bundle inside it, so no change in sensation or perfusion occur postoperatively. In conclusion, the V-Y rotation advancement flap is simple, single stage operation that is optimum for surgical reconstruction of any fingertip injury. It provides a good contour, finger pulp coverage and acceptable appearance. Keywords: Fingertip. Amputation, Pulpa, V-Y flap, Reconstruction.


Article
Modeling of Viscoelastic Contact and Grasping Stability of Hemicylindrical Fingertips for Robotic and Prosthetic Hands
نمذجة التماس اللزج المرن و استقرارية المسكة لإطراف الأصابع النصف اسطوانية للأيدي الاصطناعية و الروبوتية

Author: Sadeq Hussein Bakhy صادق حسين باخي
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2014 Volume: 18 Issue: 5 Pages: 106-133
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Viscoelastic contact problems are one of the most important problems in mechanical and robot engineering. These problems become more tedious when one of the contacting bodies carries a viscoelastic and soft material. In this study, the mathematical model of contact interface and limit surface for viscoelastic contact which can be applied to robotic and prosthetic hemicylindrical fingertips has been proposed. The new achievement of this research comprises the integration of the time-dependent nature of viscoelastic contact into the modeling of grasping and manipulation. Specifically, two conjugation equations to get together the two significant parameters of contact modeling (the half width of rectangular contact area and the profile of pressure distribution across the contact interface) have been suggested. Additionally, two cases viable to prosthetic and robotic hands for grasping have been studied: constant rectangular contact area and constant normal contact force. The results show that the control of the grasp contact forces (case 2) when employing viscoelastic contacts is most advantageous, because it promotes the stability of grasping through the enlargement domain of limit surface as time terminates. Finally, the viscoelastic limit surface results proved that the new mathematical model is more effective (18-22%) than previous models.

مسائل التماس اللزج المرن واحدة من المشاكل الهندسية الأكثر أهمية, وعندما يكون احد الاجسام المتماسة يتصرف بشكل لزج مرن والمادة ناعمة تصبح هذه المسائل أكثر تعقيد. في هذا البحث ، تم اقتراح نمذجة رياضية لمسائلة التماس السطح البيني وتماس السطوح المحددة اللزجة المرنة التي يمكن تطبيقها على أطراف الأصابع الروبوتية والاصطناعية النصف اسطوانية . تضمن الانجاز الجديد من هذا البحث دمج الوقت المعتمد الطبيعي لتماس اللزج المرن في نمذجة المسك والمناولة. على وجه التحديد، تم اقترح اثنين من معادلات الاقتران لربط اثنين من المتغيرات المهمة لنمذجة التماس (نصف عرض مساحة المستطيل المتماسة ومسارتوزيع الضغط خلال تماس للسطح البيني). بالإضافة إلى ذلك، تم دراسة حالتين قابلة للتطبيق على المسك للأيدي الاصطناعية والروبوتية: مساحة التماس الثابتة والقوة العمودية الثابتة. أظهرت النتائج أن السيطرة على قوى المسك (الحالة 2) تكون اكثر فائدة عند استخدام التماس اللزج المرن, لأنه يحسن استقرارية المسك من خلال توسيع مساحة السطح المحدد مع انقضاء الزمن. أخيرا، أثبتت نتائج السطوح المحددة اللزجة المرنة أن النموذج الرياضي الجديدي أكثر فاعلية (18-22%) من النماذج السابق


Article
A COMPARATIVE STUDY OF THE SUPRAPERIOSTEAL AND THE SUBPERIOSTEAL DISSECTION IN THE V-Y ADVANCEMENT (ATASOY) FLAP FOR THE MANAGEMENT OF FINGERTIP INJURY

Journal: Basrah Journal of Surgery مجلة البصرة الجراحية ISSN: 16833589 / ONLINE 2409501X Year: 2007 Volume: 13 Issue: 1 Pages: 1-11
Publisher: Basrah University جامعة البصرة

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Abstract

The classical Atasoy depends on the cutting of the fibrous bands of the digital pulp in order to gain advancement of the flap to cover the fingertip injury defect. A new modification of Atasoy flap was studied in comparison to the classical Atasoy flap. Thirteen patients included in this study at Al Wasity hospital between September 2003 to April 2005 they were complaining of class III Allen's fingertip injury of different fingers,3 females and 10 males , 4 cutting and 9 crushing type injury. Seven patients underwent reconstruction by the new modified Atasoy flap and 6 patients by the classical Atasoy flap. The results show that the new modification of Atasoy flap is more fitted with the principles of pulp surgery. It improves flap viability, sensibility and aesthetic results reduce the troublesome hypersensitivity and produce more physiological cover to the bone. These results may be attributed to preservation of the fibrous septae of the pulp space and avoiding the injury of the vessels and nerves by passing subperiosteall in the flap dissection.

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