Objective To investigate the difference between single lumen endotracheal intubation of thoracoscope and traditional double lumen endotracheal intubation of thoracoscope in process of thymectomy. Methods From January 2010 to June 2014, clinical data of 30 cases with thymectomy under single lumen endotracheal intubation of thoracoscope (group A) and 30 cases with thymectomy under traditional double lumen endotracheal intubation thora-coscope (group B) were analyzed. Results There were no death patients in both groups. Group A:endotracheal intu-bation time (2.67 ± 0.72) min, surgery time (48.37 ± 4.64) min, the bleeding (26.17 ± 9.62) ml; Group B:endotracheal intubation time (5.55 ± 0.71) min, surgery time (52.10 ± 5.68) min, the bleeding (33.00 ± 7.94) ml. Conclusion Compared with traditional double lumen endotracheal intubation under thoracoscope, the single lumen endotracheal intubation of thoracoscope showed that intubation time was significantly shorter, and reduced the oc-currence of postoperative complications, the operative field was exposed more completely, reduced operation time and blood loss.

BACKGROUND:MXene nanoparticles have considerable application prospects as effective functional components of skin wound dressings due to their unique properties of conductivity,hydrophilicity,antibacterial activity,and biocompatibility. OBJECTIVE:To review the synthesis methods,functional properties,and application of MXene nanoparticles in skin injury repair. METHODS:"MXene,nanoparticles,nanomaterials,bioactive nanoparticles","wound dressing,wound dressing,wound repair materials","wound repair,wound healing,wound surface"were used as Chinese search terms to search Wanfang and CNKI databases."MXene,nanoparticles,nano-materials,bioactive nanoparticles","wound dressing,wound healing material","wound healing,wound repair,wound"were used as English search terms to search the PubMed database.Finally,88 articles were included for review analysis. RESULTS AND CONCLUSION:(1)MXene synthesis can be divided into two methods:bottom-up synthesis and top-down synthesis.The synthesized MXene can be further modified to enhance biocompatibility for better application in biomedicine.(2)MXene has a series of excellent properties such as hydrophilicity,antibacterial,photothermal properties,electrical conductivity,and good biocompatibility,all of which make it the basis for excellent skin repair materials.(3)At present,many scholars have developed new composite materials for wound dressings.Currently,these composite materials are based on MXene nanomaterials and make full use of its excellent characteristics as mentioned above,which play a role in local skin wound sterilization,drug delivery,and sustained release,active regulation of cytokines,and can integrate the advantages of other biologically active agents.It plays a better role in wound healing,especially in the treatment of complex chronic wounds.(4)Various composite materials such as MXene@PVA hydrogel and MXene@CH sponge developed based on various properties of MXene have shown good effects on improving tissue repair performance and repairing skin damage as drug carriers.It shows that MXenes nanoparticles are in the initial stage of development and have great prospects in the field of promoting skin repair.The characteristics and surface modification of MXenes nanoparticles have been well studied,but the molecular mechanism of dose-dependent biotoxicity is relatively incomplete.

Objective:To compare the efficacy between locking plate internal fixation combined with iliac bone graft and separate locking plate internal fixation in the treatment of comminuted proximal humeral fracture in the elderly.Methods:A retrospective cohort study was conducted to analyze the clinical data of 42 elderly patients with comminuted proximal humeral fracture admitted to Affiliated Hospital of Qingdao University from January 2018 to January 2020. There were 20 males and 22 females, aged 65-75 years [(69.5±8.5)years]. According to Neer classification, there were 26 patients with three-part fracture and 16 with four-part fracture. Eighteen patients were treated by locking plate internal fixation combined with autologous iliac bone grafting (bone grafting group), and 24 patients were treated by locking plate internal fixation alone (non-bone grafting group). The operation time, intraoperative blood loss, postoperative drainage volume, hospitalization time, and fracture healing time were documented. Shoulder joint range of motion (forward flexion, extension, internal rotation and external rotation) and degree of humeral head height loss were measured at 1, 6, 12 months after operation and at the last follow-up. The Neer score and visual analogue score (VAS) of shoulder joint were evaluated at 12 months after operation and at the last follow-up. The complications were observed.Results:All patients were followed up for 12-24 months [(18.5±3.8)months]. There were no significant differences in operation time, intraoperative blood loss, postoperative drainage volume and hospitalization time between the two groups (all P>0.05). The fracture healing time in bone grafting group was (3.1±0.7)months, shorter than (4.2±0.9)months in non-bone grafting group ( P<0.05). In the two groups, the postoperative shoulder joint range of motion and degree of humeral head height loss increased significantly over time (all P<0.05). At 1, 6, 12 months after operation and at the last follow-up, the shoulder forward flexion range of motion in bone grafting group was (136.2±7.4)°, (139.3±6.9)°, (146.6±6.1)° and (148.4±4.7)°, higher than that in non-bone grafting group [(134.5±6.7)°, (136.5±7.0)°, (137.9±9.2)° and (138.3±7.9)°]; the shoulder extension range of motion in bone grafting group was (37.1±6.3)°, (40.5±4.4)°, (43.1±3.1) ° and (46.6±4.2)°, higher than that in non-bone grafting group [(35.5±4.6)°, (37.9±5.1)°, (41.3±2.5)° and (43.9±3.1)°]; the shoulder internal rotation range of motion in bone grafting group was (50.5±3.2)°, (54.1±5.6)°, (56.6±4.2)° and (58.9±3.6)°, higher than that in non-bone grafting group [(46.9±5.1)°, (50.3±4.2)°, (53.5±2.7)° and (55.4±5.1)°]; the shoulder external rotation range of motion in bone grafting group was (52.2±3.6)°, (55.6±4.3)°, (58.7±4.4)° and (60.2±5.6)°, higher than that in non-bone grafting group [(50.1±4.7)°, (52.6±5.7)°, (55.3±3.2)° and (57.3±4.1)°] ( P<0.05 or 0.01). At 1, 6, 12 months after operation and at the last follow-up, the degree of humeral head height loss in bone grafting group was (0.8±0.1)mm, (1.1±0.2)mm, (1.4±0.3)mm and (1.6±0.3)mm, smaller than that in non-bone grafting group [(1.1±0.2)mm, (1.4±0.3)mm, (1.7±0.6)mm and (2.0±0.5)mm] ( P<0.05 or 0.01). In the two groups, the postoperative shoulder joint range of motion and degree of humeral head height loss increased significantly over time (all P<0.05). There was no significant difference in Neer score of shoulder joint between the two groups before operation ( P<0.05). At 1, 6, 12 months after operation and at the last follow-up, the Neer score of shoulder joint in bone grafting group was (80.2±5.4)points, (82.1±5.0)points, (85.4±5.8) points and (90.3±4.6)points, higher than that in non-bone grafting group [(75.6±5.1)points, (80.4±5.5)points, (83.5±2.2)points and (87.4±4.8)points] ( P<0.05 or 0.01). There was no significant difference in VAS between the two groups before operation, at 1, 6, 12 months after operation or at the last follow-up (all P>0.05). The complication rate was 11.1% (2/18) in bone grafting group and was 20.8% (5/24) in non-bone grafting group ( P<0.05). Conclusions:For comminuted proximal humeral fractures in the elderly, locking plate internal fixation combined with autogenous iliac bone grafting can accelerate fracture healing, improve shoulder joint range of motion, promote functional recovery, and reduce complications in comparison with locking plate internal fixation alone.

PURPOSE: This study aimed to identify potential epidermal growth factor receptor (EGFR) gene mutations in non-small cell lung cancer that went undetected by amplification refractory mutation system-Scorpion real-time PCR (ARMS-PCR). MATERIALS AND METHODS: A total of 200 specimens were obtained from the First Affiliated Hospital of Guangzhou Medical University from August 2014 to August 2015. In total, 100 ARMS-negative and 100 ARMS-positive specimens were evaluated for EGFR gene mutations by Sanger sequencing. The methodology and sensitivity of each method and the outcomes of EGFR-tyrosine kinase inhibitor (TKI) therapy were analyzed. RESULTS: Among the 100 ARMS-PCR-positive samples, 90 were positive by Sanger sequencing, while 10 cases were considered negative, because the mutation abundance was less than 10%. Among the 100 negative cases, three were positive for a rare EGFR mutation by Sanger sequencing. In the curative effect analysis of EGFR-TKIs, the progression-free survival (PFS) analysis based on ARMS and Sanger sequencing results showed no difference. However, the PFS of patients with a high abundance of EGFR mutation was 12.4 months [95% confidence interval (CI), 11.6−12.4 months], which was significantly higher than that of patients with a low abundance of mutations detected by Sanger sequencing (95% CI, 10.7−11.3 months) (p < 0.001). CONCLUSION: The ARMS method demonstrated higher sensitivity than Sanger sequencing, but was prone to missing mutations due to primer design. Sanger sequencing was able to detect rare EGFR mutations and deemed applicable for confirming EGFR status. A clinical trial evaluating the efficacy of EGFR-TKIs in patients with rare EGFR mutations is needed.
Adenocarcinoma/genetics ; Adenocarcinoma/pathology ; Aged ; Aged, 80 and over ; Animals ; Base Sequence ; Disease-Free Survival ; Female ; Humans ; Lung Neoplasms/genetics ; Lung Neoplasms/pathology ; Male ; Middle Aged ; Mutation/genetics ; Mutation Rate ; Real-Time Polymerase Chain Reaction/methods ; Receptor, Epidermal Growth Factor/genetics ; Sequence Analysis, DNA/methods ; Treatment Outcome

Objective To investigate the clinical therapeutic effects of lung protective ventilation and sequential recruitment maneuver (RM) on treatment of patients with severe acute pancreatitis (SAP) complicated with acute respiratory distress syndrome (ARDS). Methods Sixty patients with SAP complicated with ARDS admitted to the Department of Critical Care Medicine of the First Affiliated Hospital of Nanchang University from April 2014 to March 2016 were enrolled. They were divided into control group and experimental group by random number table, 30 patients in each group. On the basis of comprehensive treatment, the patients in control group were treated with lung protective ventilation mode: low tidal volume ventilation (6 mL/kg) + optimal end-expiratory positive pressure (PEEP) ventilation mode, when the intra-abdominal pressure (IAP) was essentially returned to a normal level (Ⅰ grade intra-abdominal hypertension), the patients in experimental group were treated by the combination with RM therapy, and the rest treatment was the same as the control group. Under the two types of ventilation strategies, the clinical effects, respiratory mechanics, hemodynamics and arterial blood gas indexes were compared between the two groups. Results The mechanical ventilation time (days: 13.82±4.40 vs. 19.87±7.40), the length of ICU stay (days:22.67±4.40 vs. 26.43±5.39) and incidence of ventilator associated pneumonia [VAP: 16.67% (5/30) vs. 26.67% (8/30)] of the experimental group were lower than those of the control group (all P < 0.05), the mortality rate of the experimental group was slightly lower than that of the control group [26.67% (8/30) vs. 30.00% (9/30)] without statistical significance (P > 0.05). Plateau pressure (Pplat) and the peak airway pressure (PIP) at each time point were decreased after treatment in both groups, while the static lung compliance (Cst), the arterial partial pressure of oxygen (PaO2) and oxygenation index (PaO2/FiO2) were increased compared with those before treatment, especially the changes at 72 hours after recruitment in the experimental group were more significant than those in the control group [Pplat (cmH2O, 1 cmH2O = 0.098 kPa):15.6±4.0 vs. 21.2±5.6, PIP (cmH2O): 18.3±5.0 vs. 25.1±5.4, Cst (mL/cmH2O): 41.2±4.8 vs. 31.2±6.0, PaO2 (mmHg, 1 mmHg = 0.133 kPa): 90.93±6.45 vs. 80.27±4.51, PaO2/FiO2 (mmHg): 238.33±18.31 vs. 185.83±11.14]. Heart rate [HR (bpm): 110.23±7.92 vs. 98.23±8.44] and the central venous pressure [CVP (mmHg): 8.62±1.52 vs. 6.32±1.42] were significantly higher than those before treatment, the mean arterial pressure [MAP (mmHg): 86.74±7.65 vs. 94.92±10.93] and cardiac output [CO (L/min): 5.32±1.36 vs. 6.42±1.32] were significantly reduced compared with those before treatment (all P < 0.05). The values of HR, MAP, CVP, CO at 5 minutes after recruitment were (97.87±5.77) bpm, (94.54±6.87) mmHg, (6.33±1.44) mmHg, (6.32±1.41) L/min, respectively. The changes of these parameters were not significant when compared with those of the basal conditions (P > 0.05) Conclusions Based on the lung protective ventilation in the early stage, sequential RM is applied in treatment of patients with SAP complicated with ARDS, after the IAP is essentially returned to a normal, which is beneficial to improving lung compliance, promoting oxygenation, shortening the time of mechanical ventilation, reducing the length of ICU stay, and decreasing the incidence of VAP without any obvious hemodynamic influence.