Incidence of oxygen desaturation using a high-flow nasal cannula versus a facemask during flexible bronchoscopy in patients at risk of hypoxemia: a randomised controlled trial.

BACKGROUND: Patients with obstructive sleep apnoea (OSA), male sex, obesity, older age or hypertension are prone to hypoxemia during flexible bronchoscopy. This study investigated whether using a high-flow nasal cannula (HFNC) could reduce the incidence of oxygen desaturation during bronchoscopy under deep sedation in patients at risk of hypoxemia. METHODS: A total of 176 patients at risk of hypoxemia who underwent flexible bronchoscopy under deep sedation were randomly assigned to two groups: the HFNC group (humidified oxygen was supplied via a high-flow nasal cannula at a rate of 60 L/min and a concentration of 100%, n = 87) and the facemask group (oxygen was supplied via a tight-fitting facemask at a rate of 6 L/min and a concentration of 100%, n = 89). RESULTS: Oxygen desaturation occurred in 4 (4.6%) patients in the HFNC group and 26 (29.2%) patients in the facemask group (P < 0.001). The facemask group required more jaw thrust manoeuvres than the HFNC group (43[48.3%] vs. 5[5.7%], P < 0.001). 8 patients (9.0%) in the facemask group and none in the HFNC group required bag-mask ventilation (P = 0.012). CONCLUSION: The use of an HFNC can reduce the incidence of oxygen desaturation and the requirement for airway intervention in patients at risk of hypoxemia during flexible bronchoscopy under deep sedation. TRIAL REGISTRATION: www.chiCTR.org.cn Identifier: ChiCTR2100044105. Registered 11/03/2021.

The Postoperative Lymphocyte to Monocyte Ratio Change Predicts Poor Clinical Outcome in Patients with Esophageal Squamous Cell Carcinoma Undergoing Curative Resection.

BACKGROUND: Postoperative lymphocyte to monocyte ratio (post-LMR) change (LMRc) reflects the dynamic change of balance between inflammatory reaction and immune reaction after curative operation. An elevated preoperative LMR (pre-LMR) has been shown to be a prognostic factor in patients with esophageal squamous cell carcinoma (ESCC), but the clinical value of the LMRc remains unknown. METHODS: 674 patients in ESCC undergoing curative operation were enrolled in this study. LMRc (LMRc = pre-LMR-post-LMR) was counted on the basis of data within one week before and after operation. The median of LMRc was chosen to be the optimal cut-off value to evaluate the prognostic value of LMRc. RESULTS: Kaplan-Meier curves revealed that LMRc ≤ 1.59 was significantly associated with worse overall survival (OS) (P = 0.003) and disease-free survival (DFS) (P = 0.008). Multivariate analysis suggested that LMRc could serve as an independent prognostic predictor for both OS (P = 0.006, HR = 0.687, 95% CI 0.526-0.898) and DFS (P = 0.003, HR = 0.640, 95% CI 0.476-0.859). CONCLUSIONS: LMRc is a promising prognostic predictor for predicting the worse clinical outcome in patients with ESCC undergoing curative operation.

[Effect of chemotherapy preoperatively upon early postoperative cognitive dysfunction in eldly tumor patients].

OBJECTIVE: To investigate whether preoperative chemotherapy history could influence the incidence of early postoperative cognitive dysfunction (POCD) in elderly tumor patients. METHODS: A total of 107 tumor patients (> or = 60 years old, tumor TNM stages T2 - T3, N0 - N3, ASA I -III class) undergoing elective radical surgery of gastric or colorectal cancer were selected and assigned into two groups according to preoperative chemotherapy history: with preoperative chemotherapy history group (C group, n = 52) and without preoperative chemotherapy history group (N group, n = 55). Patients in two groups received radical surgery under intravenous-inhalation general anesthesia combined with epidural anesthesia. Cognitive function was assessed using a battery of neuropsychological tests from five aspects including memory, verbal intelligence, visual-motor, executive function and motor function at 1 day preoperatively and 3 days postoperatively. RESULTS: There was no significant difference in general state of patient preoperatively health including sex ratio, body mass index, complications, cancer types and stages, ASA classification between two groups (P > 0.05). Neither significant difference was found in duration of anesthesia and surgery, intra-operative bleeding volume and transfusion volume between two groups (P > 0.05). There was no significant difference in ICU admission rate, ICU stay, incidence of complications, hospitalization duration and mortality rate between two groups (P > 0.05). Preoperative neuropsychological test score in group C was slightly lower than that in group N, but the difference was not significant (P > 0.05). Impaired incidence rate of digit-symbol substitution test, controlled oral word association test, grooved pegboard non-dominant hand test and semantic fluency test at 3 days postoperation in group C were significantly higher than those in N group (P < 0.05). Incidence of POCD at 3 days postoperation in group C was significantly higher than that in group N (42.3% vs 15.4% , P < 0.05). CONCLUSION: Chemotherapy preoperatively could increase the incidence of early postoperative cognitive dysfunction in elderly with tumor.

Effect of anesthetic methods on postoperative CD3+, CD4+ and CD4+CD25+ in patients with lung cancer undergoing radical operation.

Effects of anesthesia methods on immune function in patients with lung cancer undergoing radical operation were investigated. A total of 122 patients undergoing radical resection of lung cancer who were treated in Zhejiang Cancer Hospital from September 2013 to April 2016 were randomly divided into the combined anesthesia group and the intravenous anesthesia group, with 61 cases in each group. The patients in the combined anesthesia group were given intravenous combined epidural anesthesia. Patients in the intravenous anesthesia group were given intravenous anesthesia. The change of CD3+, CD4+ and CD4+CD25+ at time-point T0 (before anesthesia), T1 (the time of anesthesia), T2 (after operation), T3 (24 h after operation), T4 (72 h after operation) were compared between the two groups. The levels of CD3+, CD4+ and CD4+CD25+ at T1, T2, T3 and T4 in the combined anesthesia group were higher than that in the intravenous anesthesia group (P<0.05). Αfter starting anesthesia, the levels of CD3+, CD4+ and CD4+CD25+ began to decrease in both groups. The levels of CD3+, CD4+ and CD4+CD25+ at T2 and T1 were lower than those at T0 (P<0.05). The levels of CD3+, CD4+ and CD4+CD25+ at T2 were lower than T1 (P<0.05). After T3, the levels of CD3+, CD4+ and CD4+CD25+ began to increase in both groups. Τhe levels of CD3+, CD4+ and CD4+CD25+ at T3 and T4 were higher in both groups than those at T2 and T1 (P<0.05), and the levels of CD3+, CD4+ and CD4+CD25+ at T4 were higher in both groups than those at T3, but the levels of CD3+, CD4+ and CD4+CD25+ at T3 and T4 were lower than those at T0 (P<0.05). Intravenous combined epidural anesthesia can maintain a relatively stable immune function compared with simple intravenous anesthesia patients.