Accession Number:

AD0263398

Title:

RELATIONSHIP OF VENOUS PRESSURE TO INTRAPULMONIC PRESSURE. A COMPARISON OF CONTINUOUS POSITIVE-PRESSURE BREATHING BY MASK AND BY HELMET

Descriptive Note:

Corporate Author:

SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Personal Author(s):

Report Date:

1961-09-01

Pagination or Media Count:

10.0

Abstract:

A study was made of the relationship of venous pressure to intrapulmonic pressure. During continuous positive-pressure breathing by mask, the superior vena cava pressure rose relatively more than did the jugular venous pressure thus an unfavorable venous pressure gradient was established for the return of blood from the head to the heart. During continuous positive-pressure breathing by helmet, the jugular venous pressure rose relatively more than did the superior vena cava pressure thus a favorable venous pressure gradient was established for the return of blood from the head to the heart. From the standpoint of pressure gradients, venous return from the head to the heart was more favorable when pressure-breathing by helmet than when pressurebreathing by mask.

Subject Categories:

  • Anatomy and Physiology
  • Life Support Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE