Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing.

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Abstract Text:

J ,T Mantoni,B Belhage,F C Pott,J ,T Mantoni,B Belhage,F C Pott,

Continuous positive airway pressure (CPAP) is a treatment modality for pulmonary oxygenation difficulties. CPAP impairs venous return to the heart and, in turn, affects cerebral blood flow (CBF) and augments cerebral blood volume (CBV). We considered that during CPAP, elevation of the upper body would prevent a rise in CBV, while orthostasis would challenge CBF. To determine the body position least affecting indices of CBF and CBV, the middle cerebral artery mean blood velocity (MCA V(mean)) and the near-infrared spectroscopy determined frontal cerebral hemoglobin content (cHbT) were evaluated in 11 healthy subjects during CPAP at different body positions (15 degrees head-down tilt, supine, 15 degrees, 30 degrees and 45 degrees upper body elevation). In the supine position, 10 cmH(2)O of CPAP reduced MCA V(mean) by 9 +/- 3% and increased cHbT by 4 +/- 2 micromol/L (mean +/- SEM); (P < 0.05). In the head-down position, CPAP increased cHbT to 13 +/- 2 micromol/L but left MCA V(mean) unchanged. Upper body elevation by 15 degrees attenuated the CPAP associated reduction in MCA V(mean) (-7 +/- 2%), while cHbT returned to baseline (1 +/- 2 micromol/L). With larger elevation of the upper body MCA V(mean) decreased progressively to -17 +/- 3%, while cHbT remained unchanged from baseline. These results suggest that upper body elevation by approximately 15 degrees during 10 cmH(2)O CPAP prevents an increase in cerebral blood volume with minimal effect on cerebral blood flow.

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Publishing Authors By Initials

J ,T Mantoni,B Belhage,FC Pott,J ,T Mantoni,B Belhage,FC Pott,

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: European journal of applied physiology

VOLUME: 101

Page Numbers: 369-75

Journal Abbreviation: Eur. J. Appl. Physiol.

ISSN: 1439-6319

DAY: 19

MONTH: 07

YEAR: 2007

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 100954790

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing.

AFFILIATION: Bispebjerg Hospital Research Unit for Anaesthesia and Intensive Care, Department of Anaesthesia, Bispebjerg Hospital, University of Copenhagen, 2400, Copenhagen NV, Denmark. jakob.hoejlund@gmail.com

Country: Germany

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Eur J Appl Physiol

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing Related Publications

• Comparison of primary lung tumor incidences in the rat evaluated by the standard microscopy method and by multiple step sections.
• Distribution of collagen type I and type III and of two collagenous components of basement membranes in the human liver.
• Hot topic--cerebral hemodynamics in the heat.
• Influence of upper body position on middle cerebral artery blood velocity during continuous positive airway pressure breathing.
• Part III: 7th Walter Hubert lecture. Pott and the prospects for prevention.
• Percivall Pott (1714-1788) and chimney sweepers' cancer of the scrotum.
• Percivall Pott and cancer scroti.
• Potential health risks from the use of fibrous mineral absorption granulates.
• THE CLASSIC: Farther Remarks on the Useless State of the Lower Limbs, in Consequence of a Curvature of the Spine: Being a Supplement to a Former Treatise on that Subject.
• Voluntary respiratory control and cerebral blood flow velocity upon ice-water immersion.
• [Demonstration of air inclusions in human hair by light and UV microscopy (author's transl)]
• [Evaluating the task or..........self-evaluation in the task]
• [Fiber as a carcinogenic agent]
• [Quality determines what is real]
• [Reiter syndrome and other forms of sero-negative arthritis. Pathogenesis determined? Consequences for medical practice]