Date: Thu Feb 8 09:47:20 2007

Author: Sam Sampere

Subject: Re: Defibrillators

Post:
Didn't you ever watch Emergency? Oh, you're too young to remember that
show. They always squirt some gel on a paddle and rub the paddles
together to distribute the gel. That gel makes good electrical contact
with the skin.

Once you do that, your water/ion-filled cells in your body, including
your heart, can conduct.

Sam

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of cablem
Sent: Thursday, February 08, 2007 9:38 AM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Defibrillators

Ok, perhaps I asked the question poorly. I don't want to know how the
device works, exactly, I want to know how the current is transported
through the body. That's the conductor? What makes the circuit?
Obviously, it has to be more than the skin. Or, is it an induction
device?

Chele


On 2/7/2007 8:02 PM, Wallin, Stephen R wrote:
> Here's another 4th ventricle
> http://en.wikipedia.org/wiki/Fourth_ventricle
> complete with its own Purkinje cells
> http://en.wikipedia.org/wiki/Purkinje_cell
> These cells are neurological pacesetters.
> Its unproven, but tasers in some cases could interfere in a
> anti-defibrillating way.
> http://en.wikipedia.org/wiki/Taser
>
> Stephen
>
> -----Original Message-----
> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu]
On
> Behalf Of Vacek Miglus
> Sent: Wednesday, February 07, 2007 2:49 PM
> To: tap-l@lists.ncsu.edu; cablem@wfu.edu
> Subject: Re: [tap-l] Defibrillators
>
> cablem wrote:
>
>> Does anyone know the science behind defibs? Do they work by the
>> conduction of electricity between the paddles or do they work by
>> induction where the mag field penetrates the skin? I've heard that
>>
> skin
>
>> is a pretty good insulator...so the first might be possible if the V
>>
> and
>
>> I are high enough to overcome the resistance. But, the second might
>> work, too. Or a combination...
>>
>> So, how do they work?
>>
>
> Nice write up in Wikipedia:
> http://en.wikipedia.org/wiki/Defibrillators
>
> The quick and dirty: discharge a Capacitor (DC) though the chest to
stop
>
> the heart from ventricular fibrillation, i.e. twitching
uncontrollably.
>
> Vacek
>
>
>
>
>
>

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Machele Kindle
Lab Manager
Physics Dept.
Wake Forest University
Winston-Salem, NC 27109

Phone: 336-758-5532
Fax: 336-758-6142


"Get Fuzzy"

Bucky, the arrogant cat: Aaaaaaaa!

Rob, the geeky owner: 11:55. Right on time for his nightly freakout.

Satchet, the lovable dog: Ever notice how he runs circles in the same
direction?

Buckey: Yaaaaaaaa!

Rob: Maybe the coriolis effect works on cats, too, eh?

Satchet: Ha, ha! I have NO idea what that means!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





Back