Questions tagged [medical]
For applications in the medical arena that will come in contact with a patient. In general these applications need to satisfy international standards such as IEC60601. These applications have stringent patient isolation constraints, capacitive leakage constraints, mode of failure constraints, and voltage or current limits that can impose considerable design limitations.
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EKG active filter designs with single power supply
This is my beginners attempt at designing a EKG. I have printed out the PCB and attached all components to it to test it out. What I have observed are the following:
1. The outputs Vout1 as well as ...
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Difficulty in gaining Class II CE certification for an aluminium single-sided PCB
We have a product that consists of an aluminium single-sided PCB with micro-controller and LEDs soldered to the copper side. The PCBA is shaped so that it can be bent to fit over the scalp of the user ...
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EFT on powersupply AC input
My system I use 110 V to 36 V power brick (medical grade), and having hybrid cable which takes this 36 V and Ethernet and goes to the system.
I am testing the EFT as per 61000-4-4 (± 2 kV, 100 kHz ...
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Medical device on patient's bed..Cannot earth the Chassis..How to provide ESD protection?
We are developing a medical device, which will sit on patient's bed. So, the medical device chassis can't be connected to earth. The powersupply of the device is isolated (2MOPP and 2 MOOP), medical ...
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Can I use USB C 3.2 Gen2 connector for power and data for a medical application?
My class 3 medical system uses 36V (~100W), 100Mbps ethernet for communication. I am planning to use USB 3.2 gen2 connector and cables to simplify my cabling in the system, and to have EMC shielding ...
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The amplification factor of the EMG circuit did not meet expectations
I've recently embarked on a project to create a DIY EMG system and have been using Multisim for simulation purposes before finalizing the PCB design. Attached is an image of my EMG circuit. In this ...
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Safety of grounded and isolated AC in medical systems
Introduction
I try to make more sense of safety and reliability of grounded and isolated electricity. I divided the problem into 3 stages:
Power-transmission line
Household electricity
Electrical ...
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How do the input current bias and the driven ground circuits in OpenBCI Ganglion work?
I am trying to understand how the OpenBCI Ganglion board works, but I can't figure out how these two sub-circuits work. I'm sorry I'm not too familiar with op-amps.
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Are rechargeable li-ion considered primary batteries if charging is not available on the device?
We are designing a one time use medical device which we would like to power using a li-ion pack that would be charged only once at the time of manufacture.
For the purposes of compliance (IEC 60601) ...
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What does 2xMOPP really mean
I am a student and I am designing a medical device that has a type CF applied part.
I know the specifications that the applied part must comply (4kV of insulation, 8mm of creepage, <10μA patient ...
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What is the ideal wireless protocol that is best suited for wireless nerve impulse transmission? [closed]
I am working to develop a way to transmit nerve impulses wirelessly (or wired) past a break in the spinal cord. What would be the ideal protocol to effectively relay the signal? Even if the device was ...
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How is a mains-connected medical device made safe against electrocuting me?
I am in physical therapy now. Some of the devices are connected to wall power, and used for muscle electrostimulation. The patient information states that no single malfunction can connect me to 230V, ...
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Any theoretical reference for empirical equation for estimating oxygen saturation (% SpO2 = 110 - 25*R)? [closed]
The empirical equation used to estimate % SpO2 is based on the observation that the ratio of the red and infrared light absorbed by arterial blood (represented by R in the equation) varies linearly ...
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What is the safest way to control another circuit?
From my custom board with an MCU I need to connect to an Interlock Pin of another circuit. I have a lot of options, but I don't know what is better.
Using an optocoupler, but I'm afraid the output ...
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Difficulties with multiplexing PPG signal in pulse oximeter
I've designed pulse oximeter circuit. When one LED lights continuously, I got perfect PPG (Photoplethysmogram) signal.
Then I measure PPG while blinking LEDS, like that:
I got stuck. There is no ...
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