The design and analysis of an adjustable and foldable bed for postural drainage

The objective of this research is to design and analyze the strength of an adjustable folding bed for postural drainage in patients with phlegm obstruction in the lungs and respiratory system. Using ergonomics and engineering principles to design the bed structure as a 3D CAD model in various positions using SolidWorks program, analyze the strength of the bed structure using the finite element method. The bed has been designed with an internal mechanism that can tilt the bed frame at an angle to help position the patient in various positions according to the principles of postural drainage techniques. The structure is defined as an aluminum pipe bent as designed the width x length of the model does not exceed more than a standard three-foot bed. Designed to be able to lifted and placed on the patient's bed and then adjusted the folding bed to various positions. Analysis of the strength of a bed designed by simulated burden loads. The patient's body weight was set to be 200 kg according to BS EN 60601. Design and analysis by creating a bed structure model. In the form of 3 poses: lying down, head of the bed raised, and foot of the bed raised. Then the analysis of 3 different structure sizes with diameters of 25.4 mm, 31 mm, and 38 mm to compare to find structures that are small, lightweight and strong enough. The analysis results found that the 25.4 mm bed structure is strong enough to be used in all positions. The minimum safety factor was found to be 2.99. Concluded that the bed structure size is 25.4 mm from the design according to this article can be adjusted to various positions following the principles of postural drainage and strong enough to bear the burden of the patient's weight accordance with BS EN 60601 standards.