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nosoccermom

Induction and pacemakers?

7 years ago

Does anybody have the latest info?

At first glance at the research, recommendations are to stay away about 22" (60 cm) from induction if one has a PM. However, that's research that may be outdated and not apply to the new PMs.

Comments (6)

  • 7 years ago

    "If it's one of the newer pacemakers, it's way outdated info."

    No it Isn't. You can't make a blanket statement about it. Here is a recent caution.

    http://www.wwl.nhs.uk/Specialities/Cardiology/pacemaker_faq.aspx


    I would check with the pacemaker company and get the opinion of the physician that put it in, which may be different. Appliance companies address this but they often blow it off. There can be a big difference in the way the pacemaker/ICD is made and what happens when it is exposed to a strong magnet. I would also consider the underlying reason why you have a pacemaker. You can find scholarly papers that say there is no problem and you can find them that say keep 24" away.


    Personally, I have a couple of induction plates, not a range. My DH has a pacemaker but is not completely dependent on it. I would keep them 24" away from him. I have a friend that is dependent on his pacemaker and I would not use them if he were here. I work in the health care field and I would ere on the side of caution because things happen that aren't supposed to.


    "DH's pacemaker is over 25 years old"

    That is amazing. My job used to involve pacemaker placements and generator changes. I don't think I have ever seen one that old that was still working but I have heard of it. We did have people come in with old pacemakers that were no longer working. I think they got away from follow up. My husband is on his fourth generator since 2003. One was defective. The technology is amazing but the price might be shorter battery life.

    nosoccermom thanked wekick
  • 7 years ago

    Obviously, I'd check with the physician and the manufacturer; however, it's just interesting that this doesn't come up in the discussion of induction.

  • 7 years ago

    It was beaten to death ca. 2007, and took a while to rise from the dead. :)

    One might expect such a powerful electromagnetic source (the coil handling kilowatts of ca. 40 kHz power) to have a wide-ranging effect on sensitive electronics. However, the coil frequency, combined with the magnetic susceptibility of the pan over the coil, tends to keep down propagation of EM waves. When I examined the field around a pan on my first induction cooktop, I was surprised that the loop "antenna" I used at the end of a 'scope probe had such a weak signal, and this was at the edge of the coil. A few inches away the signal was negligible. Now, one can always in principle build an antenna farm big enough to pick up a signal, but for a pacemaker the contest is between high sensitivity and small size (way under a wavelength of induction power at ~7.5 km).

    The information above is intended to provide insight. Only the pacemaker manufacturer can establish safe operating requirements.

    nosoccermom thanked kaseki
  • 7 years ago

    “When I examined the field around a pan on my first induction cooktop,”

    You can’t count on people having the pan perfectly centered or even on the burner.

    nosoccermom thanked wekick
  • 7 years ago

    Modern induction hob circuits use means such as examining the ringing response of the coil circuit to ensure that there is a suitable pan in place forming the other part of the anticipated circuit. Otherwise, there might be issues of circuit cooling or a higher than desired field inside the cooktop. Also, it would be a safety hazard if a powered up hob that was fully exposed had a magnetically susceptible utensil dropped onto it. An attempt to grab the quickly heated utensil could leave a permanent memory in one's hand.

    A decentered pan will still tend to "attract" the field lines of the hob. Without a pan and pan detect circuit the field lines would be toroidal about the coil, and would not extend out far from it (ignoring self-canceling quantum mechanical virtual paths).

    Nonetheless, if the hob circuit is testing for a pan that is missing the circuit will be intermittently pulsing and in my view one wouldn't want to be leaning closely over it with a pacemaker. See my last paragraph in my comment above.