X-Message-Number: 2408
From:	Ralph Merkle <>
Subject: CRYONICS: Pneumatic Vests and Cardiopulmonary Resuscitation
Date:	Wed, 15 Sep 1993 17:58:17 PDT

The Sept 9, 1993 issue of the New England Journal of Medicine, page
762-768, Vol. 329 No. 11, has an article titled:

A Preliminary Study of Cardiopulmonary Resuscitation by Circumferential
Compression of the Chest with Use of a Pneumatic Vest, by Halperin et. al.

Some quotes from the abstract:

"Methods: to produce periodic increases in intrathoracic pressure, we
developed a pneumatically cycled circumferential thoracic vest system and
compared the results of the use of this system in CPR (vest CPR) with
those of manual CPR."

"Results: In phase 1 of the study, vest CPR increased the peak aortic
pressure from 78 +/- 26 mm Hg to 138 +/- 28 mm Hg (P<0.001) and the
coronary perfusion pressure from 15 +/- 8 mm Hg to 23 +/- 11 mm Hg

"Conclusions: In this preliminary study, vest CPR, despite its late
application, successfully increased aortic pressure and coronary
perfusion pressure, and there was an insignificant trend toward
a greater likelihood of the return of spontaneous circulation
with vest CPR than with continued manual CPR.  The effect of
vest CPR on survival, however, is currently unknown and will
require further study."

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