Abstract
For now, many hospitals that require nurses to move patients by hand from stretchers to a hospital bed, so a design of stretcher with auxiliary functions of lateral positioning and transferring for immobilized patients, which is a mechanical mechanism consisted of rigid rods, joints and sliders, was designed to help the nurses to move patients between beds and reduce their workload. Driven by motors, the rigid rods can be rotated, stretched or shortened so that the entire stretcher bed board can archive to a proper posture and position. In this paper, the following objectives will be achieved: (i) Create a schematic of the mechanism and describe the principles and functions (ii) the calculation of inverse kinematics, forward kinematics, dynamics (including energy), and PD control in the mechanism (iii) The motion process of simulating the mechanism using MATLAB (iv) Using MATLAB to create the plots of angle, torque, and position state (v) Using SolidWorks to construct the prototype and to implement the motion simulation of the mechanism (vi) Describe the practical application and future Extensions of this mechanism.
Highlights
Every year, there are thousands of patients around the world
There is a problem that has not been effectively solved for a long time, which is to transfer the immobilized patients smoothly and between the operating table and the stretcher, between the stretcher and the hospital bed, or between two hospital beds
For the mechanism of the Stretcher with Auxiliary Functions of Lateral Positioning and Transferring for Immobilized Patients, the free body diagram was shown in Fig. 1 below
Summary
There are thousands of patients around the world. Some of them need to lie on a bed for temporary or permanent due to loss of mobility for various reasons, such as a fracture, an anesthesia, a stroke, a mole, an amputation or other illness. In most parts of the world, moving patients between beds requires nurses to carry them by hand. In China, because of the shortage of nurses, the family members of the patients are even needed to transfer the immobilized patients. This is a common phenomenon ([1], [2]). It is very necessary to design some mechanisms to help them to achieve this task more and safely, while reducing the burden on the nurses and patients' families, when transfer the immobilized patients between beds
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