Objective To observe the role of preoperative lung function test in predicting the risk of postoperation pulmonary complications in patients with chronic obstructive pulmonary disease (COPD) accepting non chest operations. Methods 80 patients accepting non-invasive chest operations during Oct 2006 to May 2013 in the third affiliated hospital of SYSU were studied retrospectively. All the patients accepted lung function test 1 week before operation. Based on the lung function records, patients were divided into 2 groups. 40 of them in COPD group, 40 in control group. The incidence rate of postoperation pulmonary complications in different group and the relationship between the severity of lung function decreasing and the rate of postoperation pulmonary complications were investigated. The differences of the American Society of Anesthesiologists (ASA) Physical Status Classification, body mass index, smoking index, length of stay, hospitalization costs between the 2 groups were also studied. Results The incidence rate of postoperation pulmonary disease in COPD group was 30% (12/40) while the rate in control group was 12.5% (5/40), the statistic difference was significant (P = 0.046). There was remarkable relationship between the severity of lung function decreasing and the rate of postoperation pulmonary complications(P=0.005), patients with mild to moderate lung function decreasing would be safer in operation, but patients with severe lung function decreasing would be in high risk(r=-0.451). Patients in COPD group were older than the control group, but there were no significant difference on body mass index, smoking index, length of stay, hospitalization costs between the 2 groups (P > 0.05). There was no relationship between ASA physical status classification and postoperation pulmonary complications. Conclusion Incidence of postoperation pulmonary complications in patients with COPD is high, which mainly manifests as pneumonia. It was important to test the lung function before non-invasive chest operations, especially in patients with COPD(P>0.05).

Objective To compare the clinical features and prognosis between dermatomyositis-associated interstitial lung disease (DM-ILD) and idiopathic pulmonary fibrosis (IPF).Methods Patients with interstitial lung disease with dermatomyositis (DM-ILD) or idiopathic pneumonia fibrosis (IPF) from January 2003 to March 2014 in the third affiliated hospital of Sun Yat-sen University were included.Results Among the 64 patients enrolled,44 were DM-ILD and 20 were IPF.IPF was more common in the elderly (P =0.000),men (P =0.004) and smokers (P =0.000),and its high-resolution computed tomography (CT) mostly showed grid shadow (P=0.014) and honeycomb shadow (P=0.000).DM-ILD usually had cough symptoms (P =0.025).High-resolution CT showed patchy (P =0.048) and banded (P =0.000).Glucocorticoid (P =0.000) and immunosuppressive agents (P =0.000) were commonly used in the treatment of DM-ILD.However,there was no significant difference in 90d mortality between the two groups (P ＞ 0.05).Conclusions IPF is more common in the elderly,men and smokers,and its high-resolution CT mostly shows grid shadow and honeycomb shadow,distribution is diffuse.DM-ILD often has cough symptoms,and its high resolution CT is mostly plaques and streaky shadows.Glucocorticoids and immunesuppressants are commonly used in DM-ILD,but there is no significant difference in 90-day mortality between them.

Objective To explore the application potential of forced expiratory volume in three second/forced vital capacity (FEV3/FVC) in early lung diseases,such as early airway obstruction and mild gas trap.Methods A total of 288 patients (excluding those with restrictive ventilation dysfunction) who underwent pulmonary function examination in the pulmonary function room of our hospital from January 2014 to October 2017 were collected.288 patients were divided into three groups.Group A:FEV3/FVC and forced expiratory volume in one second/forced vital capacity (FEV1/FVC) were normal;Group B:FEV3/FVC decreased alone;Group C:FEV1/FVC decreased.The general data and pulmonary function indexes of the three groups were compared.Results Compared with group A,group B had lower FEV1 ％ and diffusion capacity for carbon monoxide of the lung (DLCO％),but higher total lung capacity (TLC％),residual volume (RV％) and RV/TLC.Compared with group B,group C had higher TLC ％,RV％,RV/TLC％,while FEV1％,DLCO％ reduce more remarkably.There were significant differences in the three groups of small airway function (P ≤ 0.01).FEV3/FVC was positively correlated with max expiratory at 50％ FVC (MEF50％),max expiratory at 75％ FVC (MEF25％) and maximal mid expiratory flow (MMEF％).The correlation coefficients were respectively 0.613,0.610,0.608 (P ≤0.01).When FEV3/FVC serves as an indicator to determine airway obstruction,the specificity of it is 45.7％,sensitivity 98.5％,and negative predictive value 99％,positive predictive value 35.5％.Conclusions FEV3/FVC individual decline is the indication of early lung diseases such as mild airway obstruction,mild gas trap and diffuse disorder.

Objective: To evaluate the effect of plasma exchange combined with high-dose continuous venovenous hemodiafiltration method (CVVHDF) in the treatment of patients with acute-on-chronic liver failure with stage III-IV hepatic encephalopathy and the feasibility of pre-operative preparation for liver transplantation. Methods: Clinical data of 14 cases of medical intensive care unit of our hospital with acute-on- chronic liver failure accompanied with stage III-IV hepatic encephalopathy that underwent plasma exchange combined with high-dose CVVHDF from March 2015 to September 2017 were retrospectively summarized. The indexes of liver and kidney function, blood coagulation function, arterial blood PH, lactic acid and blood ammonia were monitored before and after treatment. Heart rate, blood pressure, APACHE II score, and consciousness recovery time were observed. Student’s t- test was used to compare the mean values between the two groups. Results: Serum total bilirubin (t = 9.43, P < 0.01), serum creatinine (t = 3.40, P < 0.01), serum ammonia (t = 10.64, P < 0.01), prothrombin activity (t = 9.19, P < 0.01), serum lactate (t = 9.25, P < 0.01), heart rate (t = 4.47, P < 0.01), and mean arterial pressure (t = 4.41, P < 0.05) were significantly improved in 14 patients before and after treatment. In addition, respiratory rate (t = 6.01, P < 0.01) and APACHE II score (t = 7.19, P < 0.01) were significantly improved (P < 0.05). Eight patients with stage III hepatic encephalopathy were treated with intermittent plasma exchange combined with CVVHDF for 3 to 14 days, and six patients with stage IV were transformed to stage III to II. Liver transplantation was successfully performed on 14 patients with shortest time duration of 3days, and longest time duration of 1 month. Conclusion Plasma exchange combined with CVVHDF can significantly improve liver and kidney functions, reduce blood ammonia level and improve mental health in patients with hepatic failure accompanied with stage III-IV hepatic coma. In addition, it also effectively increases the average arterial pressure, maintain stability of vital signs, maintain fluids, electrolytes and acid-base balance, create a stable internal environment for liver transplantation before operation, and extend time for liver transplantation.