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Relationship between PaO2/FiO2 and number of regions with B-line on transthoracic lung ultrasound: a prospective, observational study

 Jae Chul Koh  ;  Jung Hwa Hong  ;  Tae Dong Kweon  ;  Ju Yeon Park  ;  Eunji Ko  ;  Ji Young Kim 
 Journal of the Korean Society of Obstetric Anesthesia (대한산과마취학회지), Vol.14(2) : 187-192, 2019 
Journal Title
Journal of the Korean Society of Obstetric Anesthesia(대한산과마취학회지)
Issue Date
Anesthesiology ; Lung ; Prospective studies ; Pulmonary atelectasis ; Pulmonary ventilation ; Ultrasonography
Background: Aeration of the lungs must be monitored during general anesthesia because of the possibility of postsurgical pulmonary complications. The aim of this study was to compare PaO2/FiO2 and the number of regions with B-line on transthoracic lung ultrasonography (TLU) between the postinduction and postsurgical periods. Methods: Twenty-six adult patients undergoing major abdominal surgery were enrolled. Arterial blood gas analysis and TLU were performed 30 min after the induction of anesthesia (postinduction) and after skin closure (postsurgical period) while patients were under mechanical ventilation. TLU was performed in 12 regions (anterior, lateral, and posterior in the upper and lower regions of both lungs). The number of regions with Bline was counted. Results: Compared with postinduction values, the number of regions with B-line on TLU was increased in the postsurgical period (0.3 ± 0.5 to 1.3 ± 1.2, P < 0.001); however, PaO2/FiO2 did not significantly differ (421.3 ± 95.8 to 425.2 ± 86.0, P = 0.765). The change in PaO2/FiO2 (postinduction-postsurgical period) was significantly higher in Group B than in Group A (P = 0.028). Conclusions: Although the number of regions with B-line on TLU was increased in the postsurgical period, lung oxygenation did not differ, based on the main assessment in this study. In contrast, patients with an increased number of regions with B-line tended to show a reduction in PaO2/FiO2 during the postsurgical period. Further study seems necessary to establish the number of regions with B-line on TLU as a tool for evaluation of perioperative oxygenation.
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1. College of Medicine (의과대학) > Dept. of Anesthesiology and Pain Medicine (마취통증의학교실) > 1. Journal Papers
Yonsei Authors
Kweon, Tae Dong(권태동) ORCID logo https://orcid.org/0000-0002-5451-1856
Kim, Ji Young(김지영) ORCID logo https://orcid.org/0000-0001-5822-0338
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