Unitary Pressure-Sensing Patient Monitor
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Solution Overview
Problem
Current monitoring systems for patients confined to beds or wheelchairs are either invasive, prone to false alarms, costly, or difficult to maintain, and do not effectively alert caregivers when patients attempt to leave their designated areas without assistance, posing risks of falls and injuries.
Innovation Solution
A unitary, pressure-sensing system that includes a weight-sensitive switch and a battery-powered audible alarm encapsulated in a single, waterproof, and antimicrobial unit, which emits an alarm when a patient removes their weight from the switch, providing a reliable and discreet notification to caregivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic tab alarms with tether cords are used to monitor patient location, then the system can detect when a patient moves from their designated area, but the tether cord becomes tangled with the patient's arms and legs and the control unit can easily be dropped on the floor
Solution Approach 1:
The patent removes the tether cord and external control unit from the system. Instead, the monitoring function is integrated directly into the seat cushion itself, which eliminates the tangling problem and drop risk while maintaining patient movement detection capability.
Solution Approach 2:
The patent combines the control unit, alarm mechanism, and weight-sensitive switches into a single integrated seat cushion unit. This merging eliminates the need for external components connected by tether cords, thereby preventing tangling and accidental drops while preserving monitoring functionality.
2Reliability
If infrared light sensors are used to monitor patient location from a distance, then the system can detect patient movement, but the sensors must be positioned far away causing delayed detection and can be falsely tripped by caregivers
Solution Approach 1:
The patent divides the monitoring function into multiple weight-sensitive switches distributed across the seat cushion surface. This segmentation allows for precise localization of patient movement and eliminates the need for distant positioning, thereby reducing detection delay while preventing false alarms from caregiver movement.
Solution Approach 2:
The patent replaces the optical infrared detection system with a mechanical weight-sensitive switch system. This substitution enables direct contact-based detection at the patient's location, eliminating detection delays associated with distant positioning and preventing false tripping by caregivers who do not apply significant weight.
3Reliability
If mechanical restraints are used to physically confine a person to a bed or wheelchair, then the patient remains confined to the designated area, but the restraints may cause additional injury by binding the patient and affect patient dignity
Solution Approach 1:
The patent implements a monitoring system that detects patient movement and alerts caregivers without requiring physical restraints. The system serves the confinement function through electronic monitoring and alarm notification, eliminating the need for mechanical restraints that cause injury and compromise patient dignity.
4Reliability
If a unitary pressure-sensing system with multiple internal switches is used to monitor patient position, then the system can reliably detect patient movement without false alarms, but the device complexity increases
Solution Approach 1:
The patent combines multiple weight-sensitive switches, control circuitry, alarm mechanisms, and power sources into a single integrated seat cushion unit. This merging approach maintains the reliability benefits of multiple sensors while reducing overall system complexity by eliminating external components and interconnections.
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 effectively alerts caregivers to a patient's attempt to leave their bed or wheelchair without assistance, reducing the risk of falls and injuries, while being easy to use, cost-effective, and minimizing the risk of cross-contamination and component loss.
Implementation Method 1
A weight-sensitive switch and battery-powered audible alarm are encapsulated within a cover member to form a unitary, pressure-sensing system
Data Source
AI summary
A unitary patient monitoring system (100) includes an alarm, such as a loudspeaker (203) and a weight sensitive switch (201). Each component is encapsulated in a cover member (101), which can be configured as a T-shape. The alarm is actuated when a user removes his weight from the weight sensitive switch (201). Where the alarm is a loudspeaker (203), an audible alarm is emitted by the loudspeaker (203) when a user gets up off the unitary patient monitoring system (100). Optional features of the unitary patient monitoring system (100) include an interrupt switch (212) for temporarily rendering the alarm inactive and a master switch (211) for turning the unitary patient monitoring system (100) ON and OFF. The unitary patient monitoring system (100) can be configured to turn ON automatically when a user sits on the unitary patient monitoring system (100) as well.