J Anesth Perioper Med. 2014;1(1):5-14. https://doi.org/10.24015/ebcmed.japm.2014.0003
From the 1Affiliated Hospital of Luzhou Medical College, Luzhou, China; 2Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, China.
Correspondence to Dr. Ru-Rong Wang at firstname.lastname@example.org.
EBCMED ID: ebcmed.japm.2014.0003 DOI: 10.24015/ebcmed.japm.2014.0003
One-lung ventilation (OLV) is routinely used in esophagectomy to facilitate surgery. Lung injury may be induced by a "multiple-hit" mechanism. The aim of this study was to determine whether combined intervention using continuous positive airway pressure (CPAP) and air reinflation can reduce lung injury after OLV.
Patients scheduled for esophagectomy were enrolled in this prospective study. These patients were assigned randomly to four different groups. In the control group (N=24), the collapsed lung was reinflated with 80% oxygen. In the air reinflation group (N=25), room air was used to regain two- lung ventilation. In the CPAP group (N=24), 5 cm H2O CPAP was administered to the contralateral lung during OLV. In the CPAP+AIR group (N=24), the contralateral lung received CPAP during OLV, and room air was used for reinflation of the lung. Plasma malondialdehyde (MDA), superoxide dismutase (SOD), tumor necrosis factor α (TNF- α), interleukin-1β (IL-1β), interleukin-6 (IL-6), and interleukin-8 (IL-8) levels were measured at baseline (10 minutes after two lung ventilation) and 3 hours after reinflation. Bronchoalveolar lavage fluid (BALF) was obtained 30 minutes after lung re-expansion for measurements of surfactant apoprotein A (SP- A) and surfactant apoprotein C (SP- C). Computerized tomography was used to precisely detect micro- atelectasis on the fourth postoperative day.
Compared with the control group, CPAP and combined intervention increased arterial oxygen pressure levels 60 minutes after OLV (164±43 vs. 217±43; 164±43 vs. 216±52, P<0.05). The plasma MDA level in the air reinflation group was lower and SOD level was higher than those in the control group 3 hours after lung reinflation (P<0.05). The CPAP group had a lower plasma IL-8 level, a less atelectasis and a higher SP-A level in BALF (P<0.05) as compared to the control group. In the CPAP+AIR group, the plasma levels of MDA, IL-6, and IL-8, and atelectatic area reduced (7.9±3.9% vs. 4.4%±3.3%, P<0.05), while levels of SOD, SP-A, and SP-C increased (P<0.05) when compared with the control group.
CPAP combined with air reinflation increased arterial oxygen pressure levels during OLV, reduced oxidative stress and inflammation, and minimized atelectasis following esophagectomy.
Declaration of Interests
All authors have no financial support and potential conflicts of interest for this work.
This work was supported by National Natural Science Foundation of China (81170077), and scientific research fund of Sichuan provincial education department 14ZB0151, and Luzhou municipal science and technology bureau.
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