The volume of the extra and intrapulmonary segments of the pulmonary artery in intact dogs

M. Friedman, Adam Wanner

Research output: Contribution to journalArticle

Abstract

The relative contributions of the extra and intrapulmonary segments of the pulmonary artery to the total pulmonary arterial blood volume (VPA) at functional residual capacity (FRC) and during lung inflation were investigated in anesthetized intact dogs. VPA was determined by an ether pneumotachographic method and the volume of the extrapulmonary segment (VPAep) by an angiographic technique. The volume of the intrapulmonary segment (VPAiP) was calculated by subtraction of VPAep from VPA. Using transvenous phrenic nerve stimulation, changes in transmural pulmonary arterial pressure and transpulmonary pressure (PTP) were measured during open airway lung inflation. Some of the dogs were then subjected to hypoxia by breathing mixtures of 7-10% oxygen in nitrogen and repeat measurements taken. The results indicate that VPA is evenly distributed between the extra and intrapulmonary segments of the pulmonary artery and that this relationship is not affected by either lung inflation or hypoxia.

Original languageEnglish
JournalFederation Proceedings
Volume35
Issue number3
StatePublished - Dec 1 1976

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Pulmonary Artery
Dogs
Economic Inflation
Lung
Functional Residual Capacity
Phrenic Nerve
Blood Volume
Ether
Arterial Pressure
Respiration
Nitrogen
Oxygen
Pressure
Hypoxia

ASJC Scopus subject areas

  • Medicine(all)

Cite this

The volume of the extra and intrapulmonary segments of the pulmonary artery in intact dogs. / Friedman, M.; Wanner, Adam.

In: Federation Proceedings, Vol. 35, No. 3, 01.12.1976.

Research output: Contribution to journalArticle

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