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Lung ultrasound score-based perioperative assessment of pressure-controlled ventilation-volume guaranteed or volume-controlled ventilation in geriatrics: a prospective randomized controlled trial

Authors Kim YS, Won YJ, Lee DK, Lim BG, Kim H, Lee IO, Yun JH, Kong MH

Received 15 April 2019

Accepted for publication 29 June 2019

Published 18 July 2019 Volume 2019:14 Pages 1319—1329

DOI https://doi.org/10.2147/CIA.S212334

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Colin Mak

Peer reviewer comments 2

Editor who approved publication: Dr Richard Walker


Video abstract presented by Young Sung Kim.

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Young Sung Kim, Young Ju Won, Dong Kyu Lee, Byung Gun Lim, Heezoo Kim, Il Ok Lee, Jin Hee Yun, Myoung Hoon Kong

Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Korea University College of Medicine, Guro-gu, Seoul, Republic of Korea

Purpose: Recent studies have shown the potential benefits of pressure-controlled ventilation-volume guaranteed (PCV-VG) compared to volume-controlled ventilation (VCV), but the results were not impressive. We assessed the effects of PCV-VG versus VCV in elderly patients by using lung ultrasound score (LUS).
Patients and methods: Elderly patients (aged 65–90 years) scheduled for hip joint surgery were randomly assigned to either the PCV-VG or VCV group during general anesthesia. LUS and mechanical ventilator parameters were evaluated before induction, 30 mins after a semi-lateral position change, during supine repositioning before awakening, and 15 mins after arrival to the post-anesthesia care unit (PACU). Pulmonary function tests were performed before and after surgery. Other recovery indicators were also assessed in the PACU.
Results: A total of 76 patients (40 for PCV-VG and 36 for VCV) were included this study. Demographic data showed no significant difference between the two groups. In both groups, LUSs before induction were significantly lower than those at other time points. LUSs of the VCV group were significantly increased during perioperative periods compared with the PCV-VG group (p=0.049). Visualized LUS modeling suggested an intuitive difference in the two groups and unequal distribution in lung aeration. Higher dynamic compliance and lower inspiratory peak pressure were observed in the PVC-VG group compared to the VCV group (33.54 vs 27.36, p<0.001; 18.93 vs 21.19, p<0.001, respectively). Postoperative forced vital capacity of the VCV group was lower than that of PCV-VG group, but this result was not significant (2.06 vs 1.79, respectively; p=0.091). The other respiratory data are comparable between the two groups.
Conclusion: The PCV-VG group showed better LUS compared with the VCV group. Moreover, LUS modeling in both groups suggests non-homogeneous and positional change in lung aerations during surgery.
Clinical trial registration: This study was registered at the UMIN clinical trials registry (unique trial number: UMIN000029355; registration number: R000033510)

Keywords: geriatrics, hip joint surgery, mechanical ventilation, lung physiology, ultrasonography

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