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Greetings:
I am posting a summary of the replies I received regarding pressure
transducers - specifically those that can measure pressures down to -50 mm
Hg. These replies are being attached as a separate ASCII document.
---
Scott Mclean
smclean@iastate.edu
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MESSAGE #1
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Dear Scott
We haven't tried it but the disposable transducers used in hospitals
should meet your needs. For example, COBE disposable have a pressure
range of -50 to +300 and will read between -400 and +4000. You can get an
information sheet from COBE Laboratories by calling 800-525-COBE. Why
don't you contact your cardiology dept and have them give you a discarded
one to try. Good luck.
Joyce Evans
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MESSAGE #2
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Scott
Here is one company in Germany building special pressure trancducer:
Mammendorfer Institut fuer Physik und Medizin
Hauptstrasse 3a
D-82285 Hattenhofen
Tel. ++49-8145-1018
Fax. ++49-8145-9209-33
I got a pressure trancducer to messure inside the disk, and this one
works very nice.
Try to contact Mr. Rosenheimer
Hope this is useful to you
Christian Haid
Univ.-Klinik f. Orthop.
Anichstr.35
A-6020 Innsbruck - Austria
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MESSAGE #3
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We use a Mikro-Tip Catheter Pressure Transducer to measure pressure inside
muscular compartments of the leg. I think these systems are capable of
measuring negative pressures.
Contact:
Millar Instruments, Inc.
P.O. Box 230227
Houston, Texas 77223-0227
USA
Telephone 1-800-669-2343
(713) 923-9171
FAX: (713) 923-7757
Don MacLeod
NSRCLFL@AC.DAL.CA
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MESSAGE #4
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From: "Lee, Stuart"
Subject: RE: Request: Pressure Transducer Info
We do a LOT of LBNP sessions here at NASA. The pressure transducer we use is
a Validyne. We have taken subjects to as low as -110 mmHg and it has
performed well. We even use an analog output to interface with a computer
program controller. I don't have the purchasing info off hand but I think
this can be purchased pretty easily. I have asked one of our biomedical
engineers to get some more info if possible.
Stuart Lee
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MESSAGE #5
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From: pmullin@ix.netcom.com (Paul Mullin)
Subject: Re: Request: Pressure Transducer Info
To: Scott Mclean
Scott,
I would suggest that you do some scrounging around at hospitals and
hospital supply firms in your area for used intensive care bedside
monitors. Check with the Biomedical Engineering or Clinical
Engineering Departments at the hospitals. There are also used medical
equipment dealers that handle such things.
You can get your pressure measurement needs taken care of as well as
electrocardiogram and other monitor functions. You might even get a
freebie. These units are generally set up to measure from 0-300 mm Hg
and most would work fine for a body box application.
Good Luck.
Paul Mulln (pmullin@ix.netcom.com)
-----------------------------------------------------------------------
MESSAGE #6
-----------------------------------------------------------------------
From: "Lee, Stuart"
Subject: FW: Request: Pressure Transducer Info
To: "Scott Mclean"
As an update to my earlier message, our engineers here say that the Gould
system is probably overkill and far more expensive than our Validynes. And
we actually calibrate them to -130 mmHg.
__________________________________________________ _____________________________
From: Lee, Stuart on Fri, Apr 21, 1995 11:38 AM
Subject: RE: Request: Pressure Transducer Info
To: Scott Mclean
We do a LOT of LBNP sessions here at NASA. The pressure transducer we use is
a Validyne. We have taken subjects to as low as -110 mmHg and it has
performed well. We even use an analog output to interface with a computer
program controller. I don't have the purchasing info off hand but I think
this can be purchased pretty easily. I have asked one of our biomedical
engineers to get some more info if possible.
Stuart Lee
I am posting a summary of the replies I received regarding pressure
transducers - specifically those that can measure pressures down to -50 mm
Hg. These replies are being attached as a separate ASCII document.
---
Scott Mclean
smclean@iastate.edu
--------------------------------------------------------------------
MESSAGE #1
--------------------------------------------------------------------
Dear Scott
We haven't tried it but the disposable transducers used in hospitals
should meet your needs. For example, COBE disposable have a pressure
range of -50 to +300 and will read between -400 and +4000. You can get an
information sheet from COBE Laboratories by calling 800-525-COBE. Why
don't you contact your cardiology dept and have them give you a discarded
one to try. Good luck.
Joyce Evans
-------------------------------------------------------------------
MESSAGE #2
-------------------------------------------------------------------
Scott
Here is one company in Germany building special pressure trancducer:
Mammendorfer Institut fuer Physik und Medizin
Hauptstrasse 3a
D-82285 Hattenhofen
Tel. ++49-8145-1018
Fax. ++49-8145-9209-33
I got a pressure trancducer to messure inside the disk, and this one
works very nice.
Try to contact Mr. Rosenheimer
Hope this is useful to you
Christian Haid
Univ.-Klinik f. Orthop.
Anichstr.35
A-6020 Innsbruck - Austria
-----------------------------------------------------------------------
MESSAGE #3
-----------------------------------------------------------------------
We use a Mikro-Tip Catheter Pressure Transducer to measure pressure inside
muscular compartments of the leg. I think these systems are capable of
measuring negative pressures.
Contact:
Millar Instruments, Inc.
P.O. Box 230227
Houston, Texas 77223-0227
USA
Telephone 1-800-669-2343
(713) 923-9171
FAX: (713) 923-7757
Don MacLeod
NSRCLFL@AC.DAL.CA
-----------------------------------------------------------------------
MESSAGE #4
-----------------------------------------------------------------------
From: "Lee, Stuart"
Subject: RE: Request: Pressure Transducer Info
We do a LOT of LBNP sessions here at NASA. The pressure transducer we use is
a Validyne. We have taken subjects to as low as -110 mmHg and it has
performed well. We even use an analog output to interface with a computer
program controller. I don't have the purchasing info off hand but I think
this can be purchased pretty easily. I have asked one of our biomedical
engineers to get some more info if possible.
Stuart Lee
-----------------------------------------------------------------------
MESSAGE #5
-----------------------------------------------------------------------
From: pmullin@ix.netcom.com (Paul Mullin)
Subject: Re: Request: Pressure Transducer Info
To: Scott Mclean
Scott,
I would suggest that you do some scrounging around at hospitals and
hospital supply firms in your area for used intensive care bedside
monitors. Check with the Biomedical Engineering or Clinical
Engineering Departments at the hospitals. There are also used medical
equipment dealers that handle such things.
You can get your pressure measurement needs taken care of as well as
electrocardiogram and other monitor functions. You might even get a
freebie. These units are generally set up to measure from 0-300 mm Hg
and most would work fine for a body box application.
Good Luck.
Paul Mulln (pmullin@ix.netcom.com)
-----------------------------------------------------------------------
MESSAGE #6
-----------------------------------------------------------------------
From: "Lee, Stuart"
Subject: FW: Request: Pressure Transducer Info
To: "Scott Mclean"
As an update to my earlier message, our engineers here say that the Gould
system is probably overkill and far more expensive than our Validynes. And
we actually calibrate them to -130 mmHg.
__________________________________________________ _____________________________
From: Lee, Stuart on Fri, Apr 21, 1995 11:38 AM
Subject: RE: Request: Pressure Transducer Info
To: Scott Mclean
We do a LOT of LBNP sessions here at NASA. The pressure transducer we use is
a Validyne. We have taken subjects to as low as -110 mmHg and it has
performed well. We even use an analog output to interface with a computer
program controller. I don't have the purchasing info off hand but I think
this can be purchased pretty easily. I have asked one of our biomedical
engineers to get some more info if possible.
Stuart Lee