Touch-Sensitive Medical Device Control Surface Hygiene
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Solution Overview
Problem
Conventional medical device control elements are difficult to clean and disinfect due to dirt and bacteria accumulation, limit multifunctionality, require precise manual adjustment, and can be hard to read, posing risks of short circuits and operator distraction.
Innovation Solution
A touch-sensitive control element with sensors beneath a protective cover allows easy cleaning, enables multifunctionality by detecting finger position for various device settings, and displays current values for quick and intuitive adjustments using capacitive sensors and light-emitting diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional switches, levers, pushbuttons or rotary knobs are used for controlling medical devices, then individual functions can be controlled, but dirt and bacteria collect on the interfaces making cleaning and disinfection difficult
Solution Approach 1:
The patent replaces mechanical control elements (switches, levers, pushbuttons, rotary knobs) with a touch-sensitive sensor system. The control surface is made smooth and continuous without mechanical interfaces, allowing easy cleaning while maintaining control functionality through capacitive or resistive touch sensing.
Solution Approach 2:
The patent introduces a protective cover or membrane as an intermediary layer between the user's finger and the sensor. This cover can be easily disassembled and cleaned, preventing direct contact between contaminants and the sensor while still allowing touch detection through the cover material.
2Device complexity
If conventional control elements are used, then simple control is achieved, but only individual functions can be controlled simultaneously
Solution Approach 1:
The patent implements a universal control surface where different zones or patterns on the same continuous surface control different functions. The touch-sensitive sensor array can detect various touch patterns (single touch, multi-touch, sliding gestures) to control multiple device functions simultaneously, making the control element versatile while maintaining simplicity.
Solution Approach 2:
The patent divides the control surface into multiple sensing zones or regions, each associated with different device functions. By detecting which zone is touched and the characteristics of the touch, the system can control multiple functions independently through a single unified interface.
3Measurement precision
If linear adjustment of current value is used, then precise control is achieved, but the operator must grip and move the control element from current position to target position causing distraction
Solution Approach 1:
The patent allows the operator to pre-select a target position on the control surface and then simply touch or move to that position without needing to manually traverse from the current value position. The system automatically interpolates the value change, reducing the physical movement required and minimizing operator distraction.
Solution Approach 2:
The patent uses visual display elements (such as LED indicators or graphical interfaces) that show the current value and target position, allowing the operator to see the relationship between control position and device parameter without having to physically trace the adjustment path. This visual copying of information reduces cognitive load and maintains operator focus on the primary task.
4Device complexity
If conventional control elements are used, then basic control is achieved, but they are difficult to read and may transmit short circuits to the operator
Solution Approach 1:
The patent introduces a non-conductive cover or membrane as an intermediary between the operator's finger and the electrical components. This cover provides electrical isolation, preventing short circuits from reaching the operator while still allowing capacitive or resistive touch sensing to function through the insulating material.
Solution Approach 2:
The patent replaces direct electrical contact mechanisms with field-based sensing (capacitive or resistive fields that can detect touch through non-conductive materials). This substitution eliminates exposed electrical contacts that could cause short circuits while maintaining the ability to detect and respond to user input.
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 solution provides a hygienic, easy-to-clean interface that allows simultaneous control of multiple device functions with intuitive adjustments, reducing operator distraction and risk of electrical hazards while ensuring easy readability and quick setting of parameters.
Implementation Method 1
capacitive detection of the finger position of an operator above a parameter field
Implementation Method 2
light-emitting diodes
Data Source
Figure 1~1a
Figure 2~3
AI summary
The present invention relates to a control element and a method for inputting values on a medical device (1), comprising a touch-sensitive sensor (19) and a control surface (22), wherein the sensor (19) is mounted below a cover (20) forming the control surface (22), detects the presence or absence of a control element (11), and generates a contact value (17). A display (14) of the control element shows a current value (16), which can be changed to a set value (15) by means of the contact value (17) of the sensor (19). Advantageously, the current value (16) can be changed by touching the control surface (22) at any point or at a point corresponding to the set value (15), depending on the manner in which the control surface (22) is touched.