Effect of lung protective ventilation on perioperative pulmonary function in elderly patients received pulmonary lobectomy of lung cancer
TANG Yuru1,2 LI Hui2 SHUAI Xunjun2 HOU Nianguo2 SUN Mingjie2 XU Tangwen2 TENG Na2 AI Dengbin1,2#br#
1.Graduate School, Taishan Medical University, Shandong Province, Tai′an 271016, China;
2.Department of Anesthesiology, Municipal Hospital of Qingdao Research Center of Clinical Anesthesiology of Qingdao, Shandong Province, Qingdao 266011, China
Abstract:Objective To evaluate the effect of lung protective ventilation strategies on the pulmonary function and postoperative pulmonary complications in elderly patients with pulmonary lobectomy. Methods A total of 60 elderly patients with lung cancer of ASA physical status Ⅰ-Ⅱ, aged 62-72 year, weighing 50-80 kg, who underwent elective pulmonary lobectomy surgery in Municipal Hospital of Qingdao from January to December 2014 were seleced. All patients were divided into two groups (n=30): protective ventilation group (group PV) and conventional ventilation group (group CV) according to random number table. In group CV, patients received volume-controlled ventilation and the VT was 10 mL/kg. In group PV, patients received pressure-controlled ventilation, the VT was 6 mL/kg, and the positive end-expiratory pressure (PEEP) was 6 cmH2O. The oxygen concentration was 100%, the inhalation and exhalation rate was 1∶2, and the partial pressure of end-tidal CO2 was 35-45 mmHg. The peak inspiratory pressure (PIP) and the plateau pressure (PPleatu) were compared and analyzed at the time of double lung ventilation (TLV) 15 min (T1), one-lung ventilation (OLV) 15 min (T2), OLV 60 min (T3), and the restore TLV 15 min (T4). The time from stopping anesthetic to extubating tracheal tube was also recorded and compared. Blood samples were collected from radial artery for blood gas analysis, the PaCO2 and PaO2 were compared and analyzed at the time of T1, T2, T3, T4, 2 h after pulmonary lobectomy surgery (POD0), the morning of 1 days after surgery (POD1) and the morning of 2 days after surgery (POD2). Chest X-ray in two groups was also compared and analyzed in POD2. Results There were no significant differences between the two groups in sex, age, weight, smoking history, preoperative pulmonary function, anesthesia time, operation time, surgical approach and duration of postoperative tracheal intubation (P > 0.05). Compared with group CV, PIP, PPleatu and PaO2 were significantly decreased, PaCO2 was increased at T2, T3 in group PV, with statistically significant differences (P < 0.05). Compared with group CV, PaO2 levles were significantly increased in group PV at POD0, POD1, POD2, with statistically significant differences (P < 0.05). Compared with group CV, the incidence of postoperative pulmonary atelectasis, pulmonary infiltrates were significantly decreased in group PV (P < 0.05). Conclusion The protective lung ventilation strategy can significantly reduce intraoperative mechanical ventilation pressure, improve postoperative pulmonary oxygenation function, reduce incidence rate of postoperative atelectasis and lung tissue infiltrates of elderly patients underwent pulmonary lobectomy.