Pleural pressure from abdominal to pulmonary rib cage: sweep of the lung border

E. Agostoni, L. Zocchi, P. G. Agostoni, P. T. Macklem

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Pleural pressure was measured by a capsule placed in the superior part of right 8th or 9th intercostal space of dogs in left lateral posture. Transit of lung border was observed through endothoracic fascia at sides of the capsule. During inspiration the capsule membrane faced sequentially: diaphragm, lung border, lung; vice versa during expiration. Pressure on the diaphragm at end expiration was -5.3 ± 0.5 cm H2O, reflecting outward recoil of the rib cage. At transit of lung border during inspiration (bor. I) a marked negative pressure spike occurred; a smaller spike occurred at expiratory transit (bor. E). These spikes should reflect pleural liquid pressure at lung border. At bor. I lung volume and radial displacement of rib 9 or 10 were greater during active than passive ventilation, whereas at bor. E they were similar under both conditions. Hence, during spontaneous inspiration displacement of lung border lags behind lung and rib expansion. Speed of lung border (assessed from duration of negative spike) ranged from 0.8 to 2.3 cm/sec during spontaneous breathing. On average it was similar at bor. I and bor. E, while air flow was greater at bor. I.

Original languageEnglish
Pages (from-to)105-115
Number of pages11
JournalRespiration Physiology
Volume75
Issue number1
DOIs
Publication statusPublished - 1989

Fingerprint

Pressure
Lung
Capsules
Ribs
Diaphragm
Rib Cage
Fascia
Posture
Ventilation
Respiration
Air
Dogs
Membranes

Keywords

  • Apposition zone
  • Dog
  • Lung zone
  • Pleural liquid pressure
  • Pleural surface pressure

ASJC Scopus subject areas

  • Physiology
  • Pulmonary and Respiratory Medicine

Cite this

Pleural pressure from abdominal to pulmonary rib cage : sweep of the lung border. / Agostoni, E.; Zocchi, L.; Agostoni, P. G.; Macklem, P. T.

In: Respiration Physiology, Vol. 75, No. 1, 1989, p. 105-115.

Research output: Contribution to journalArticle

Agostoni, E. ; Zocchi, L. ; Agostoni, P. G. ; Macklem, P. T. / Pleural pressure from abdominal to pulmonary rib cage : sweep of the lung border. In: Respiration Physiology. 1989 ; Vol. 75, No. 1. pp. 105-115.
@article{cc6a7fb53ccc4139ba7c788abbc7144b,
title = "Pleural pressure from abdominal to pulmonary rib cage: sweep of the lung border",
abstract = "Pleural pressure was measured by a capsule placed in the superior part of right 8th or 9th intercostal space of dogs in left lateral posture. Transit of lung border was observed through endothoracic fascia at sides of the capsule. During inspiration the capsule membrane faced sequentially: diaphragm, lung border, lung; vice versa during expiration. Pressure on the diaphragm at end expiration was -5.3 ± 0.5 cm H2O, reflecting outward recoil of the rib cage. At transit of lung border during inspiration (bor. I) a marked negative pressure spike occurred; a smaller spike occurred at expiratory transit (bor. E). These spikes should reflect pleural liquid pressure at lung border. At bor. I lung volume and radial displacement of rib 9 or 10 were greater during active than passive ventilation, whereas at bor. E they were similar under both conditions. Hence, during spontaneous inspiration displacement of lung border lags behind lung and rib expansion. Speed of lung border (assessed from duration of negative spike) ranged from 0.8 to 2.3 cm/sec during spontaneous breathing. On average it was similar at bor. I and bor. E, while air flow was greater at bor. I.",
keywords = "Apposition zone, Dog, Lung zone, Pleural liquid pressure, Pleural surface pressure",
author = "E. Agostoni and L. Zocchi and Agostoni, {P. G.} and Macklem, {P. T.}",
year = "1989",
doi = "10.1016/0034-5687(89)90090-X",
language = "English",
volume = "75",
pages = "105--115",
journal = "Respiration Physiology",
issn = "0034-5687",
publisher = "Elsevier BV",
number = "1",

}

TY - JOUR

T1 - Pleural pressure from abdominal to pulmonary rib cage

T2 - sweep of the lung border

AU - Agostoni, E.

AU - Zocchi, L.

AU - Agostoni, P. G.

AU - Macklem, P. T.

PY - 1989

Y1 - 1989

N2 - Pleural pressure was measured by a capsule placed in the superior part of right 8th or 9th intercostal space of dogs in left lateral posture. Transit of lung border was observed through endothoracic fascia at sides of the capsule. During inspiration the capsule membrane faced sequentially: diaphragm, lung border, lung; vice versa during expiration. Pressure on the diaphragm at end expiration was -5.3 ± 0.5 cm H2O, reflecting outward recoil of the rib cage. At transit of lung border during inspiration (bor. I) a marked negative pressure spike occurred; a smaller spike occurred at expiratory transit (bor. E). These spikes should reflect pleural liquid pressure at lung border. At bor. I lung volume and radial displacement of rib 9 or 10 were greater during active than passive ventilation, whereas at bor. E they were similar under both conditions. Hence, during spontaneous inspiration displacement of lung border lags behind lung and rib expansion. Speed of lung border (assessed from duration of negative spike) ranged from 0.8 to 2.3 cm/sec during spontaneous breathing. On average it was similar at bor. I and bor. E, while air flow was greater at bor. I.

AB - Pleural pressure was measured by a capsule placed in the superior part of right 8th or 9th intercostal space of dogs in left lateral posture. Transit of lung border was observed through endothoracic fascia at sides of the capsule. During inspiration the capsule membrane faced sequentially: diaphragm, lung border, lung; vice versa during expiration. Pressure on the diaphragm at end expiration was -5.3 ± 0.5 cm H2O, reflecting outward recoil of the rib cage. At transit of lung border during inspiration (bor. I) a marked negative pressure spike occurred; a smaller spike occurred at expiratory transit (bor. E). These spikes should reflect pleural liquid pressure at lung border. At bor. I lung volume and radial displacement of rib 9 or 10 were greater during active than passive ventilation, whereas at bor. E they were similar under both conditions. Hence, during spontaneous inspiration displacement of lung border lags behind lung and rib expansion. Speed of lung border (assessed from duration of negative spike) ranged from 0.8 to 2.3 cm/sec during spontaneous breathing. On average it was similar at bor. I and bor. E, while air flow was greater at bor. I.

KW - Apposition zone

KW - Dog

KW - Lung zone

KW - Pleural liquid pressure

KW - Pleural surface pressure

UR - http://www.scopus.com/inward/record.url?scp=0024574829&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024574829&partnerID=8YFLogxK

U2 - 10.1016/0034-5687(89)90090-X

DO - 10.1016/0034-5687(89)90090-X

M3 - Article

C2 - 2717809

AN - SCOPUS:0024574829

VL - 75

SP - 105

EP - 115

JO - Respiration Physiology

JF - Respiration Physiology

SN - 0034-5687

IS - 1

ER -