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Hello,
I could use some help understanding the single fault safety requirements surrounding the use of a small touchscreen in a medical device (such as the touchscreen in your smartphone).
A touchscreen input device has a single chip which monitors and communicates when the user touches the screen. I don't think it would be possible to find such a chip and screen that could be considered "component with high-integrity characteristic", and it is easy to imagine a scenario where a touch event is incorrectly reported.
I could use some help understanding the single fault safety requirements surrounding the use of a small touchscreen in a medical device (such as the touchscreen in your smartphone).
A touchscreen input device has a single chip which monitors and communicates when the user touches the screen. I don't think it would be possible to find such a chip and screen that could be considered "component with high-integrity characteristic", and it is easy to imagine a scenario where a touch event is incorrectly reported.
- Does this mean that a normal capacitive touchscreen cannot be used to control a device which is in direct contact with a patient and could harm him if operated incorrectly?
- Would you therefore need to employ a second touch technology such as resistive or infrared?
- What if there is an emergency stop button alongside the screen?
- Any examples of touchscreen used in patient critical medical devices?