My original question had nothing to do with SAR, because I'm talking about devices which deliver rf power "galvanically" to the patient skin, by means of an electrode.
Is it reasonable to assume that for frequencies above 100 kHz, a direct application of rf current to the human skin is very unlikely (or unable) to cause ventricular fibrillation? Paolo Peruzzi From: "Garnier, David S (GE Healthcare)" <[email protected]> To: "Paolo Peruzzi" <[email protected]> Sent: Thu, 8 Feb 2007 09:47:52 -0500 Subject: RE: effects of high frequency currents on human body > What kind of device are we talking about? I know the folks > in MRI are concerned about SAR... There was concern about > generating SAR numbers for wireless ECG telemetry... > > Regards, > > dave garnier > > David Garnier > e GE HealthCare > ___________________________________________ > > David S. Garnier > Quality Assurance Technician > Quality-DI RA-EMC > 3000 N. Grandview Ave - M/S W-1250 > Waukesha, Wi. 53188 > Tel: 262.312.7246 > Cel: 414.899.7580 > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Paolo > Peruzzi > Sent: Thursday, February 08, 2007 3:50 AM > To: [email protected]; E-mail > Subject: effects of high frequency currents on human body > > Dear all, > I'm looking for a guidance on the effects of currents on the human body > for frequencies above 100 kHz and up to tens of MHz. > I've read IEC 60479-2 and ICNIRP guidelines, but none of them seems > to give satisfactory information to set a reasonably safe > current/voltage/power limit for an equipment intended to delivery rf > or shortwave current to a patient by means of a bipolar or unipolar electrode. > A lot of systems recently have appeared on the market for medical and > aesthetic applications, but it looks like high frequency electrical > features are up to the manufacturer, with no real regulatory constraint. > > Regards, > > Paolo Peruzzi > Regulatory Medical R&D > El.En. S.p.A. > Via Baldanzese, 17 > 50041 Calenzano (FI) > Italy > > Tel. +39 055 8826807 > FAX +39 055 8832884 > http://www.elengroup.com/ > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
