Defibrillator protection test

[subbash]

Dear All,

We want to certify our ECG device as per IEC60601-2-25 standard.

I would like to know about the availability of any test equipment to perform the Defibrillator protection test.

If anyone has dealt with this test, please share your experience and also how the test was carried out.

Please also provide some inputs about Energy reduction test.





Thanks in advance.

 

[MedMartin]

Hi subbash,

We perform the test regularly on devices accompanying the development.

Here are commercial testers:
Zeus Version 2 (25/400) Defibrillations-Simulator - MedTec & Science GmbH
D5-PF

You can build your own test setup, if you want . The setup like the tests is described in detail in the standard 60601-1.

Best regards
Martin

 

[subbash]

Dear MedMartin,

Thank you for your time in replying to my query. I will look into the option of building our own test setup.

The ECG cables we are using currently, does not contain any protection resistors. We have provided a 10Kohm resistor (suitable for withstanding defibrillator pulses) on board along with MAX30034 Defibrillator protection IC.

Based on your experience, Do we need to use ECG cables which contain protection resistors...?

Thanks and Regards,

Subbash

 

[MedMartin]

Hi Subbash,

there is no need for protection in the cable if you have protection on the board. You have to provide clearance and creepage for the defibrillator protection of 4mm. And the resistors have to be pulse rated for the test pulse.

10 kOhm is a common value for defibrillator protection resistors.

The connector from cable to device may need a larger connector if protection is not in the cable (high pulse voltage ...).

Best regards
Martin

 

[subbash]

Dear Mr. Martin,


Thank you for your guidance. I did not understand the 4mm distance. Is it the distance between the on board ECG Connector pins and the Defibrillator protection resistor. Can you please provide some info related to the optimal size of connector.



Any links that can provide information related to above questions would also be fine.



Thanks and Regards,
Subbash

 

[MedMartin]

Dear Subbash,

there was already a discussion of this topic on this forum. See the thread
Defib Protected Applied Parts: 4mm clearance/creepage?

from post 9 on.

In my opinion the 4 mm should also be applied to ECG input pins.
Others have more liberal approaches as you can read in the thread (post 10).

Best regards,
Martin

 

[Pads38]

For those looking for detailed information on defib testing, Cove member Peter Selvey has an article here:

Defibrillator Proof Testing — MEDTEQ