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Wang N, Ye Y, Lin H, Sun T, Hu Y, Shu Y, Tong J, Tao Y, Zhao Z. Effects of pressure-controlled ventilation targeting end-inspiratory flow rate on pulmonary complications and inflammation levels in patients undergoing spinal surgery in the prone position: a randomized clinical trial. BMC Anesthesiol 2024; 24:59. [PMID: 38336616 PMCID: PMC10854117 DOI: 10.1186/s12871-024-02439-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
BACKGROUND This study assessed the impact of pressure-controlled ventilation (PCV) focusing on end-inspiratory flow rate on the incidence of postoperative pulmonary complications (PPCs) and inflammation levels in patients undergoing spinal surgery in the prone position. METHODS A total of 187 patients who underwent posterior spinal surgery were enrolled and randomly divided into 3 groups: 61 in the volume-controlled ventilation (VCV) group (group V), 62 in the PCV-volume-guaranteed (VG) group (group P1), and 64 in the PCV-VG end-expiratory zero flow rate group (group P2). Indicators including tidal volume (VT), peak airway pressure (Ppeak), and dynamic lung compliance (Cdyn) were recorded. The Ppeak, Cdyn, PETCO2, and oxygenation index (PaO2/FiO2) after intubation (T0), after prone position (T1), 60 min after prone position (T2), and after supine position at the end of surgery (T3) of the three groups were collected. RESULTS In the within-group comparison, compared with T0, Ppeak increased at T1 - 2 in groups V and P1 (P < 0.01), whereas it decreased at T1 - 3 in group P2 (P < 0.01). Cdyn decreased at T1 - 2 and PaO2/FiO2 increased at T1 - 3 in all three groups (P < 0.01), and PaO2/FiO2 increased at T1 - 3 (P < 0.01). Compared with group V, Ppeak decreased at T0 - 3 in group P1 (P < 0.01) and at T1 - 3 in group P2 (P < 0.01), while Cdyn increased at T0 - 3 in groups P1 and P2 (P < 0.01). Compared with group P1, Ppeak was elevated at T0 (P < 0.01) and decreased at T1 - 3 (P < 0.05), and Cdyn was elevated at T0 - 3 in group P2 (P < 0.01). The total incidence of PPCs in group P2 was lower than that in group V (P < 0.01). Compared with the preoperative period, serum interleukin 6 (IL-6) and C-reactive protein (CRP) levels were increased at 24 and 72 h after surgery in group V (P < 0.01), whereas that was increased at 24 h after surgery in group P1 and group P2 (P < 0.01). Compared with group V, serum IL-6 and CRP levels were reduced at 24 h after surgery in groups P1 and P2 (P < 0.01 or < 0.05). CONCLUSION In patients undergoing spinal surgery in the prone position, PCV-VG targeting an end-inspiratory zero flow rate lowers the incidence of PPCs and inflammation levels.
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Affiliation(s)
- Na Wang
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Yong Ye
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Hui Lin
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Tingting Sun
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Yue Hu
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Yuanhang Shu
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Jing Tong
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China
| | - Yong Tao
- Department of Anesthesia Operation, The First People's Hospital of Shuangliu District, Chengdu, West China Airport Hospital of Sichuan University), No. 120 of Chengbei Street, Dongsheng Town, Shuangliu District, Chengdu, 610200, Sichuan, China.
| | - Zeyu Zhao
- Department of Anesthesiology, Sichuan Provincial Rehabilitation Hospital Affiliated Chengdu University of Traditional Chinese Medicine, No.81 of Bayi Road, Yongning Street, Wenjiang District, Chengdu, 611135, Sichuan, China.
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Niyatiwatchanchai N, Thengchaisri N. Effects of pressure- and volume-controlled ventilation on the work of breathing in cats using a cuffed endotracheal tube. Vet World 2021; 14:2568-2573. [PMID: 34840479 PMCID: PMC8613800 DOI: 10.14202/vetworld.2021.2568-2573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/24/2021] [Indexed: 11/21/2022] Open
Abstract
Background and Aim: Mechanical ventilation is essential for supporting patients’ respiratory function when they are under general anesthesia. For cats with limited lung capacity, the different effects of volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) on respiratory function remain elusive. The objective of the present study was to compare the efficacy of VCV and PCV in cats under general anesthesia using a cuffed endotracheal tube (ETT). Materials and Methods: Twelve healthy cats were randomly allocated to either a VCV or PCV group. Five tidal volumes (6, 8, 10, 12, and 14 mL/kg) were randomly applied to assess the efficacy of VCV, and respiratory rates were adjusted to achieve a minute ventilation of 100 mL/kg/min. Peak inspiratory pressures (4, 5, 6, 7, and 8 mmHg) were randomly applied to assess the efficacy of PCV, and respiratory rates were adjusted to achieve a minute ventilation of 100 mL/kg/min. Blood pressure, gas leakages, and end-tidal CO2 were recorded from 60 trials for airway control during the use of VCV or PCV. Data were compared using Fisher’s exact test with a significance level of p<0.05. Results: Leakages did not differ between VCV (1/60 events) and PCV (0/60 events; p=0.500). Hypercapnia was identified when using VCV (6/60 events) less frequently than when using PCV (7/60 events; p=0.762), but did not reach statistical significance. Hypotension (mean arterial blood pressure <60 mmHg) occurred less frequently with VCV (0/60 events) than with PCV (9/60 events; p=0.003). Moreover, VCV provided a significantly lower work of breathing (151.10±65.40 cmH2O mL) compared with PCV (187.84±89.72 cmH2O mL; p<0.05). Conclusion: VCV in cats using a cuffed ETT causes less hypotension than PCV. It should be noted that VCV provides a more stable tidal volume compared with PCV, resulting in a more stable minute volume. Nonetheless, VCV should not be used in patients with an airway obstruction because higher peak airway pressure may occur and lead to lung injury.
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Affiliation(s)
- Nutawan Niyatiwatchanchai
- Surgery Unit, Kasetsart University Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, 10900, Thailand
| | - Naris Thengchaisri
- Department of Companion Animal Clinical Sciences, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, 10900, Thailand.,Tippimarn Veterinary Hospital, Chulabhorn Royal Academy, 906/1 Pong Ta Long Subdistrict, Pak Chong District, Nakhon Ratchasima, 30130, Thailand
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