eISSN: 1897-4252
ISSN: 1731-5530
Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery
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2/2023
vol. 20
 
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abstract:
Original paper

Comparison of peripheral blood saturation with brain oxygenation in patients undergoing thoracic surgery

Bartosz Kubisa
1
,
Anna Lesińska
2
,
Krzysztof Safranow
3
,
Jarosław Pieróg
1
,
Janusz Wójcik
1
,
Małgorzata Edyta Wojtyś
1
,
Tomasz Grodzki
1
,
Kajetan Kiełbowski
1

  1. Department of Thoracic Surgery and Transplantation, Pomeranian Medical University, Szczecin, Poland
  2. Department of Invasive Cardiology, District Hospital, Szczecin, Poland
  3. Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
Kardiochirurgia i Torakochirurgia Polska 2023; 20 (2): 83-93
DOI: https://doi.org/10.5114/kitp.2023.129553
Online publish date: 2023/07/26
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Introduction:
Near-infrared spectroscopy (NIRS) is a non-invasive method of regional tissue oxygenation measurement. Intraoperative use of NIRS to monitor brain oxygenation (BO) during surgery might be beneficial to identify cerebral desaturations.

Aim:
To compare peripheral blood saturation (SpO2) with BO measurements and evaluate the utility of BO in thoracic surgery.

Material and methods:
We took BO and SpO2 measurements in a group of 100 patients undergoing standard thoracic surgery. Measurements were made every 15 minutes. The Mann-Whitney U test was used to compare study groups. Spearman’s rank correlation coefficient was used to determine correlation between studied parameters.

Results:
We found a negative correlation between patients’ age and BO at the beginning of surgery. Operations lasted between 30 and 200 minutes. We found a positive correlation between BO and SpO2 between 15 and 90 minutes of surgery. Subsequently, BO remained at a low level while SpO2 returned to baseline values. Higher minimum SpO2 values were noted in patients undergoing left-sided procedures.

Conclusions:
Cerebral oxygenation does not return to baseline values until the end of the surgery as opposed to the SpO2. Furthermore, both SpO2 and BO correlate negatively with the overall duration of thoracic surgery. In addition, after 90 minutes of surgery, SpO2 stopped reflecting brain oxygenation.

keywords:

brain oxygenation, thoracic surgery, peripheral blood saturation, near-infrared spectroscopy
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