Open AccessInfluence of intra-abdominal pressure on the amplitude of fluctuations of cerebral hemoglobin concentration in the respiratory band
Author(s) -
Piotr Sawosz,
Michał Kacprzak,
Przemyslaw Pulawski,
Magdalena Morawiec,
Karolina Bejm,
Magdalena Bielacz,
Roman Maniewski,
Adam Liebert,
Wojciech Dąbrowski
Publication year - 2019
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.10.003434
Subject(s) - medicine , cerebral perfusion pressure , abdominal cavity , oxygenation , hemoglobin , anesthesia , respiration , perfusion , breathing , venous return curve , cardiology , cerebral blood flow , hemodynamics , surgery , anatomy
An intra-abdominal pressure (IAP) is correlated with cerebral perfusion, in a mechanism of reducing venous outflow. The elevated intra-abdominal pressure leads to an increase in the intracranial pressure and a decrease in the cerebral perfusion pressure. We studied the relationship between the IAP and the cerebral oxygenation with the use of the near infrared spectroscopy technique during a gynecological surgery. The changes in hemoglobin concentrations were analyzed in the time-frequency domain in the frequency band related to respiration. The measurements were carried out in 15 subjects who underwent laparoscopic surgery. During the laparoscopy, the intra-abdominal cavity was insufflated with CO 2 , which caused a controlled increase in the IAP. It was observed that the amplitudes of respiration-related waves present in hemoglobin concentration signals show an increase of 1.5 to 8.5 times during elevation of the IAP by 15 mmHg.