Does depth of the frontal sinus affect near-infrared spectroscopy measurement?

Frederik Holmgaard; Anne G Vedel; Annika Langkilde; Jens C. Nilsson; Hanne Berg Ravn

doi:10.1177/0267659116649425

Does depth of the frontal sinus affect near-infrared spectroscopy measurement?

Frederik Holmgaard^*, Anne G Vedel, Annika Langkilde, Jens C. Nilsson, Hanne Berg Ravn

^*Corresponding author for this work

Department of Clinical Medicine

Abstract

Near-infrared spectroscopy (NIRS) is a non-invasive method that reflects real-time cerebral oxygenation (rSO₂) by the use of two adhesive optodes placed on the forehead of the patient. Frontal sinuses vary anatomically and a large frontal sinus might compromise the NIRS signal since the NIRS optodes are placed at the skin surface superficial to the underlying frontal sinus. The aim of this case-series was to elucidate whether there is a difference in the obligate changes in rSO₂ during cardiac surgery between patients with a small as opposed to a large anterior-posterior distance of the frontal sinus based on magnetic resonance imaging. Two matched groups with small (n = 5) vs. large (n = 5) frontal sinus (3.2 vs. 18.1 millimeters) in this case-series showed no difference in obligate changes of rSO₂ (p = 0.54).

Original language	English
Journal	Perfusion
Volume	31
Issue number	8
Pages (from-to)	659-661
Number of pages	3
ISSN	0267-6591
DOIs	https://doi.org/10.1177/0267659116649425
Publication status	Published - 2016

Keywords

cardiac surgery
cerebral oximetry
frontal sinus
magnetic resonance imaging
near-infrared spectroscopy
signal interference
sinus frontalis

Access to Document

10.1177/0267659116649425

Cite this

@article{f1c7d445e8b043638ca4b4557bf46c2c,

title = "Does depth of the frontal sinus affect near-infrared spectroscopy measurement?",

abstract = "Near-infrared spectroscopy (NIRS) is a non-invasive method that reflects real-time cerebral oxygenation (rSO2) by the use of two adhesive optodes placed on the forehead of the patient. Frontal sinuses vary anatomically and a large frontal sinus might compromise the NIRS signal since the NIRS optodes are placed at the skin surface superficial to the underlying frontal sinus. The aim of this case-series was to elucidate whether there is a difference in the obligate changes in rSO2 during cardiac surgery between patients with a small as opposed to a large anterior-posterior distance of the frontal sinus based on magnetic resonance imaging. Two matched groups with small (n = 5) vs. large (n = 5) frontal sinus (3.2 vs. 18.1 millimeters) in this case-series showed no difference in obligate changes of rSO2 (p = 0.54).",

keywords = "cardiac surgery, cerebral oximetry, frontal sinus, magnetic resonance imaging, near-infrared spectroscopy, signal interference, sinus frontalis",

author = "Frederik Holmgaard and Vedel, {Anne G} and Annika Langkilde and Nilsson, {Jens C.} and Ravn, {Hanne Berg}",

year = "2016",

doi = "10.1177/0267659116649425",

language = "English",

volume = "31",

pages = "659--661",

journal = "Perfusion",

issn = "0267-6591",