Turning and Repositioning Bed for Patient (Turning Sheet, Roller and Side Rail Design)

Ong, Tian Liee (2017) Turning and Repositioning Bed for Patient (Turning Sheet, Roller and Side Rail Design). Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

Turning a paralysed or weak patient on bed is necessary to keep the blood flows and to prevent the bedsore. However, the nurse or the care taker often needs sufficient strength to push the patient in order to turn the patient aside. However, an auto turning bed is rare in the market. In this project, a flexible yet low cost turning bed was designed and built so that the process of turning a patient can be done easily by the care taker. The design is based on a user of less than 100 kg in weight. For a user of above 100 kg, motor with higher torque can be replaced as stated in this dissertation. After the design stage, the fabrication of the prototype was carried out. The test and modification of the prototype were carried out also in order to solve the problem faced. Apart from targeting a low cost product, manufacturability and assembly constraint were taken into consideration in materials and components selection. The design concept is to build a side rails with motor on a piece of plywood. This product can then be placed on any ordinary single bed. A mattress can then be placed on the plywood before the turning sheet is attached to the roller. With the aid of the care take, the rolling mechanism is able to turn the user from lying on their back to right side or left side, and vice versa. The mechanism also can be used to reposition the user to the centre of the bed. The mechanism can be controlled by pressing the buttons on a panel or pressing on the buttons of the remote control provided. Survey has been carried out to check the marketability and the responses are encouraging. The cost of the products was estimated as RM2379 which is within the preferred affordable price through the survey. The turning bed has been successfully designed, fabricated and tested with user. All objectives have been achieved within the given time frame. Besides, an experiment to determine the coefficient of friction of the fabrics has been carried out. Based on the experiment, the coefficient of friction of the fabric is 0.7.