Patient Turning Sheet With Dual-Friction Surfaces and Positioning Wedges
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Solution Overview
Problem
Existing devices and methods for turning and positioning bedridden patients are inefficient, time-consuming, and pose risks to caregivers, often leading to non-compliance with turning protocols and difficulty in maintaining consistent turning angles, which increases the risk of pressure ulcers, particularly in the sacral region.
Innovation Solution
A system comprising a sheet with contrasting friction surfaces and tether straps, combined with wedges, to facilitate safe and efficient patient turning and positioning, ensuring consistent angles and reducing sliding, while allowing for secure attachment to the bed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional pillows are used to support the patient during turning, then the patient can be positioned at angles, but the pillows are non-uniform and can slip out from underneath the patient, making it difficult to achieve consistent turning angles
Solution Approach 1:
The sheet has different friction characteristics on its top and bottom surfaces. The bottom surface has a low friction coefficient to allow smooth sliding of the patient during turning, while the top surface has a high friction coefficient to prevent the patient from slipping. This local differentiation of friction properties enables consistent angle positioning without requiring pillows.
Solution Approach 2:
The sheet acts as an intermediary between the patient and the bed surface. By providing a controlled friction interface, the sheet mediates the interaction between the patient and the bed, enabling stable positioning at specific angles without the need for traditional pillows that tend to slip.
2Reliability
If frequent turning of the patient is performed to prevent pressure ulcers, then patient safety is improved, but the process is difficult and time-consuming, requiring two or more caregivers
Solution Approach 1:
The sheet enables the patient to be turned by a single caregiver through a self-service mechanism. The low friction bottom surface allows the caregiver to slide the sheet and patient together with minimal effort, while the high friction top surface keeps the patient securely positioned during the turn, eliminating the need for multiple caregivers.
Solution Approach 2:
The sheet changes the friction parameter between the patient and the bed surface. By providing a low friction interface at the bottom and high friction at the top, the sheet reduces the force required to move the patient during turning, making the process faster and requiring fewer caregivers.
3Manufacturing precision
If pillows are used to support the patient during turning, then positioning is achieved, but pushing and pulling the patient's weight during turning can result in injury to caregivers
Solution Approach 1:
The sheet serves as a mediator that distributes the patient's weight and reduces the force required to move them. The low friction bottom surface allows the sheet to slide smoothly under the patient, while the high friction top surface maintains positioning, thereby reducing the physical strain on caregivers during turning.
Solution Approach 2:
The sheet changes the friction parameter to reduce the force required for turning. The low friction coefficient at the bottom surface minimizes the force needed to slide the patient, while the high friction coefficient at the top surface maintains positioning stability, thereby reducing injury risk to caregivers.
4Reliability
If the sheet bottom surface has high friction to prevent sliding, then patient stability is improved, but the sheet cannot be easily moved or repositioned
Solution Approach 1:
The sheet has differentiated friction properties: the bottom surface has low friction to enable easy repositioning and sliding during turning, while the top surface has high friction to prevent the patient from slipping. This local quality differentiation resolves the contradiction between stability and ease of movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables safe, efficient, and compliant patient turning, reducing the risk of pressure ulcers by minimizing friction and sliding, and requiring fewer caregivers, thus enhancing patient care and caregiver safety.
Implementation Method 1
The bottom surface of the sheet has a low friction surface forming at least a portion of the bottom surface
Implementation Method 2
The top surface has a high friction surface forming at least a portion of the top surface, such that the top surface provides greater slipping resistance than the bottom surface
Implementation Method 3
The support device may be a wedge having a wedge body formed at least partially of a foam or other compressible material and having a base wall, a ramp surface, and a back wall, the ramp surface joined to the base wall to form an apex and positioned at an angle of approximately 15-35 degrees to the base wall
Data Source
AI summary
A device for use with a bed having a frame and a supporting surface includes a flexible sheet with a tether strap connected to the sheet and extending from the sheet. The flexible sheet has opposed top and bottom surfaces, with the top surface having a high friction material with a higher coefficient of friction as compared to the bottom surface, which includes a low friction material. The tether strap is configured for connection to the frame of the bed to secure the sheet in place. A system incorporating the flexible sheet may also include an absorbent pad configured to be placed on the top surface of the sheet, where the high-friction top surface resists sliding of the absorbent pad, as well as one or more wedges having a base wall that the wedge rests on and a ramp surface configured to confront the sheet when the wedge is placed under the sheet. The base wall and the ramp surface may also contain high friction and low friction materials, respectively.