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العنوان
Structure and analysis of woven compression bandages for venous leg ulcers /
المؤلف
Aboal-Asaad, Abdel-Hamid Rajab Ramadan.
هيئة الاعداد
باحث / عبدالحميد رجب رمضان أبوالأسعاد
مشرف / بريجيتا كولافوفا سيركوفا
باحث / عبدالحميد رجب رمضان أبوالأسعاد
مناقش / بريجيتا كولافوفا سيركوفا
الموضوع
Textile Engineering. Textile industry. Woven compression bandage.
تاريخ النشر
2021.
عدد الصفحات
online resource (115 pages) :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الهندسة الصناعية والتصنيع
تاريخ الإجازة
1/1/2021
مكان الإجازة
جامعة المنصورة - كلية الهندسة - قسم هندسة الغزل والنسيج
الفهرس
Only 14 pages are availabe for public view

from 115

from 115

Abstract

Woven compression bandage (WCB) is one of elastic textiles that exert pressure on muscles. With a defined tensile strength, it is possible to create the required compression on the given body parts. The proposed study aims to investigate the relationship between woven fabric deformation, porosity, and tensile stress properties of three main types of woven compression bandages. All bandage samples are applied on human leg using two and three layers bandaging techniques. The study investigated the commercial yarns available in the bandage market in addition to yarns spun at a wider range of ply twist. Moreover, the study analysed the influence of yarn material and bandaging techniques on corresponding pressure at the ankle and mid-calf positions. Results revealed that the optimum twist for plied yarn should be (1800 – 2200 turns per meter) to produce highly extensible WCB. Another part of the dissertation was a modification of the structure and construction of a WCB made of 100% cotton, where the bandage includes an integrated tension sensor, which causes a colour change of the bandage during its deformation. The solution is sensors in the bandage in the form of threads with a colour different from the other structure of the bandage, which become visible due to deformation / stress in the bandage. Implementation is possible by applying weft threads with different colours through the weft insertion during weaving. The measured pressure using PicoPress was compared with theoretical compression calculated by Laplace’s law and Al-Khaburi’s equations. The bandage porosity is calculated for all frames at different weave angles using NIS elements software. Woven bandage construction parameters which are given by the warp and weft yarns preparation, twist, count, and density along with woven fabric weave, type of weaving and finishing process are the main factors influence the bandage properties. Experimental results confirm that bandage porosity is directly proportional to the bandage extension and weave angle that ranges from 44º to 90º. The novelty of candidate study is to introduce practical remarks to the patient for optimizing the required bandage pressure by suitable extension or applied tension or weave angle for two and three layers bandaging systems. Thermal resistance (Rct) and water vapour resistance (Ret) are evaluated for four types of WCB, then compared with thermal foot model (TFM). Flexor Carpi (FC), Soleus (SO), and Medial Gastrocnemius (MG) muscles are selected to represent the wrist, ankle, and mid-calf muscles respectively, which are then evaluated by EMG electrical voltage test with and without wearing WCB. Using WCB significantly decreased the muscle’s activation and was associated with higher median frequency for both SO and MG muscles during the tested activities.