blood pressure
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Posts: 46,084
I am rebuilding a blood pressure exhibit at our sciece museum but
would like to know where and if I can get the a sensor. Interfacing
the BS2 to one of the commercial units is rather a mystery.
Any idea where I can find cuffs, pressure sensors, and also if there
is any way of getting other medical sensors such as heart rate, pulse
oximeter etc.
Al
would like to know where and if I can get the a sensor. Interfacing
the BS2 to one of the commercial units is rather a mystery.
Any idea where I can find cuffs, pressure sensors, and also if there
is any way of getting other medical sensors such as heart rate, pulse
oximeter etc.
Al
Comments
I've seen something years ago, it worked with a light and a LDR. The light
was on one side of a finger, and the LDR on the other side.
I think that the blood pulses generate a light variation you may use.
Maybe I could find this out of my (very) old books... Let me know if you're
interested.
Best regards,
Phil.
Original Message
From: <alnajjar@s...>
To: <basicstamps@egroups.com>
Sent: Saturday, January 13, 2001 5:13 AM
Subject: [noparse][[/noparse]basicstamps] blood pressure
> I am rebuilding a blood pressure exhibit at our sciece museum but
> would like to know where and if I can get the a sensor. Interfacing
> the BS2 to one of the commercial units is rather a mystery.
>
> Any idea where I can find cuffs, pressure sensors, and also if there
> is any way of getting other medical sensors such as heart rate, pulse
> oximeter etc.
>
>
> Al
>
>
>
>
>
light dependent resistor. Suggest you amplify signal with op amp and filter
out noise and artifacts from finger movements. Pulse oximeters are available
on the medical marketplace and you may be able to located a used model and
interface it to your existing system. Obtaining an ECG signal may be a bit
more difficult (but not impossible) and we designed a specialized chair at
the University of Missouri that was intended for mass screening that took
ECG's while the patient sat it in. A physical/ohmic connection is required
and ECG's are usually obtained in low electrical noise and somewhat
controlled environments. Do you have any experience in the use of Parallax
products? I don't and would like to talk with someone about them Where are
you located? Please Advise. Thanks, Burt
I know that oximeter work somewhat like that. This instrument measure
oxygen content in the blood, and an LED light transmission is measured
and calibrated.
Many thanks
--- In basicstamps@egroups.com, "Philippe Derenne" <derennep@s...>
wrote:
> Hi Al,
>
> I've seen something years ago, it worked with a light and a LDR. The
light
> was on one side of a finger, and the LDR on the other side.
> I think that the blood pulses generate a light variation you may
use.
> Maybe I could find this out of my (very) old books... Let me know if
you're
> interested.
>
> Best regards,
>
> Phil.
>
>
Original Message
> From: <alnajjar@s...>
> To: <basicstamps@egroups.com>
> Sent: Saturday, January 13, 2001 5:13 AM
> Subject: [noparse][[/noparse]basicstamps] blood pressure
>
>
> > I am rebuilding a blood pressure exhibit at our sciece museum but
> > would like to know where and if I can get the a sensor.
Interfacing
> > the BS2 to one of the commercial units is rather a mystery.
> >
> > Any idea where I can find cuffs, pressure sensors, and also if
there
> > is any way of getting other medical sensors such as heart rate,
pulse
> > oximeter etc.
> >
> >
> > Al
> >
> >
> >
> >
> >
with interfacing, limited experience with Micro-controllers and BS2.
I do know all the necessary stuff in electronics to "fuge" it.
I am the VP of exhibits at a Science Center here and get to play with
hundreds of cool stuff and have the money to make new ones. This is
not unlike the St. Louis Science center. Incidently, I am building
few exhibits for them for fun!
I am not sure how I can help, but send me an e-mail on my personal
address.
I would really like to know about your ECG chair, sounds like a cool
exhibit to have here!
Al
--- In basicstamps@egroups.com, burtsz@a... wrote:
> Hi Al, Suggest using red led to shine through finger to photo
transistor or
> light dependent resistor. Suggest you amplify signal with op amp
and filter
> out noise and artifacts from finger movements. Pulse oximeters are
available
> on the medical marketplace and you may be able to located a used
model and
> interface it to your existing system. Obtaining an ECG signal may
be a bit
> more difficult (but not impossible) and we designed a specialized
chair at
> the University of Missouri that was intended for mass screening that
took
> ECG's while the patient sat it in. A physical/ohmic connection is
required
> and ECG's are usually obtained in low electrical noise and somewhat
> controlled environments. Do you have any experience in the use of
Parallax
> products? I don't and would like to talk with someone about them
Where are
> you located? Please Advise. Thanks, Burt
it is a good idea to check into what FDA regulations will govern its use.
This is especially true for ECG due to electrode contact, and the
possibility of current delivered to the subject through the electrodes
through equipment failure. This is considered by the FDA a Class II device.
Total current leakage should be < 50 uA. Circuitry from power supplies to
isolation amplifier chips should be UL2601 approved. Circuit boards should
have a 4 mm air gap separating isolated human circuitry (ground planes,
etc.) from other circuitry, among many other things.
Been there done that,
Dennis
WSR, Inc (OEM for medical diagnostic equipment)
Pasadena CA
Original Message
From: burtsz@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=146XnvTHIn3r6fQoYKD1IQcHrXLDzciw8OAU5NY7SxBLsNME_pL3VyXVpXgIzuXD1aGJvcY]burtsz@a...[/url
Sent: Sunday, January 14, 2001 11:42 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] blood pressure
Hi Al, Suggest using red led to shine through finger to photo transistor or
light dependent resistor. Suggest you amplify signal with op amp and filter
out noise and artifacts from finger movements. Pulse oximeters are
available
on the medical marketplace and you may be able to located a used model and
interface it to your existing system. Obtaining an ECG signal may be a bit
more difficult (but not impossible) and we designed a specialized chair at
the University of Missouri that was intended for mass screening that took
ECG's while the patient sat it in. A physical/ohmic connection is required
and ECG's are usually obtained in low electrical noise and somewhat
controlled environments. Do you have any experience in the use of Parallax
products? I don't and would like to talk with someone about them Where are
you located? Please Advise. Thanks, Burt