Patient Support Stabilization for CPR
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Solution Overview
Problem
Existing patient support apparatuses are not ideally suited for stabilizing patients during cardiopulmonary resuscitation (CPR), as they lack sufficient rigidity and stability when the backrest is reclined.
Innovation Solution
Incorporation of a backrest support member and a leg rest support member that can be selectively deployed to provide additional support and stability, along with an expandable base, to maintain the backrest and leg rest in a stable position during CPR, utilizing actuators and a control system to automate the deployment in emergency situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest is made pivotable between upright and reclined positions, then the adaptability of the patient support apparatus is improved, but the stability of the backrest in the reclined position deteriorates
Solution Approach 1:
The backrest support member is designed to dynamically change its state between stowed and deployed positions based on the backrest angle. When the backrest is reclined beyond a threshold angle, the support member automatically deploys to provide stabilization, transitioning from a static structure to a dynamic one that adapts to operational requirements.
Solution Approach 2:
The backrest stabilization function is segmented into a separate backrest support member that can independently deploy when needed. This segmentation allows the backrest to maintain its primary function of providing support while adding stabilization capability through the separate support member, resolving the contradiction between adaptability and stability.
2Stability of the object's composition
If a backrest support member is deployed to stabilize the backrest, then the stability of the patient support apparatus is improved, but the device complexity increases
Solution Approach 1:
The backrest support member is pre-configured and pre-positioned within the backrest assembly. When stabilization is needed, the member is quickly deployed from its pre-stowed position rather than requiring complex assembly procedures. This preliminary preparation reduces the operational complexity of adding stabilization functionality.
Solution Approach 2:
The backrest support member is designed to automatically deploy when the backrest reaches a predetermined reclined angle, eliminating the need for manual intervention or complex control systems. The self-activating mechanism reduces operational complexity while maintaining stability functionality.
3Ease of operation
If the backrest support member is made manually movable between stowed and deployed positions, then the ease of operation is improved, but the reliability of automatic stabilization deteriorates
Solution Approach 1:
The backrest support member incorporates a self-activating mechanism that automatically deploys when the backrest reaches a predetermined reclined angle. This automatic deployment ensures reliable stabilization without requiring manual operation, resolving the contradiction between ease of operation and reliability of automatic stabilization.
Solution Approach 2:
The system uses the backrest angle itself as feedback to trigger the support member deployment. When the backrest reaches the threshold angle, the mechanical feedback automatically activates the support member, ensuring consistent and reliable stabilization while maintaining operational simplicity.
Data Source
AI summary
A patient support apparatus includes a base, a seat supported by the base and a backrest pivotable between an upright position and a reclined position. In one embodiment, a backrest support member is coupled to the backrest and is adapted to move between a stowed position in which the backrest support member does not support the backrest and a deployed position in which the backrest support member does support the backrest. Movement to the deployed position occurs in response to activation of an emergency control. In other embodiments, the base includes a portion that moves into an extended position underneath the backrest when the backrest is in the reclined position. Movement of the base portion to the extended position also occurs in response to activation of an emergency control.