PNEUMATIC STRETCHER-CHAIR DEVICE FOR PARALYSED PATIENTS (original) (raw)
In this age of nuclear families, the smaller number of available caregivers for paralyzed patients is a major problem. The shifting of such patients to a wheelchair is a delicate process and in most of the instances, two or more caregivers are required. This paper presents the design and fabrication of pneumatically powered stretcher-chair convertible device with movable support segments in an attempt to help such patients and caregivers. This helps the caregiver avoid heavy lifting situations that put their back at risk of injury. The caregiver can merely shift the patient from a bed on to the device while the device is in the form of a stretcher. Then the device can be converted into a chair and the wheels of the device provide mobility like a wheelchair. Most paralyzed patients develop pressure ulcers which add to their misery causing immense pain and irritation. Support surface pressure or the reaction pressure of the surface on which the patient's body is supported has been identified as a major cause of pressure ulcer formation. In order to address this scenario, an idea of alternating pressure support surface has been implemented. This mechanism relieves support surface pressure on the patient's body thus preventing/ prolonging pressure ulcer formation. It also exposes the body to more air so that perspiration on the patient's skin evaporates better. Further, this mechanism acts as a body/ muscle stimulating mechanism. The alternating pressure support surface is also actuated by pneumatic power and controlled by an electronic timing circuit.
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