RELATIONSHIP OF VENOUS PRESSURE TO INTRAPULMONIC PRESSURE. A COMPARISON OF CONTINUOUS POSITIVE-PRESSURE BREATHING BY MASK AND BY HELMET
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1961
- Accession Number
- AD0263398
Entities
People
- Louis F. Johnson Jr.
Organizations
- United States Air Force School of Aerospace Medicine