[Research on Rapid Detection Technology for Quality Control of Emergency Ventilator].

OBJECTIVE: In order to grasp the quality status of the first-aid ventilator in pre-hospital and field environment in time, the quality control and detection items of invasive ventilator were optimized to form a rapid detection operation process of first-aid ventilator and ensure the safety of patient treatment. METHODS: Based on the quality control detection data of invasive ventilator in hospital in recent years, methods such as narrowing the range of qualified criteria and analyzing confidence interval were adopted to extract indicators prone to deviation and verify their correlation with similar indicators, so as to form an optimized rapid detection portfolio. RESULTS: Compared with the original quality control detection procedures, the detection indicators of the rapid detection procedures were reduced from 5 categories of 24 indicators to 3 categories of 7 indicators. The detection time was shortened by 56.1% and the coincidence rate of the detection results was 100% after the actual measurement and verification. CONCLUSIONS: Under the premise of ensuring the testing quality, the operating procedure for rapid detection of emergency ventilator can greatly reduce the detection time, and realize the rapid and high frequency quality control detection, so as to ensure the quality and safety of the equipment.

LncRNA NORAD/miR-202-5p regulates the drug resistance of A549/DDP to cisplatin by targeting P-gp.

In this study, we established the DDP-resistant NSCLC cell line A549/DDP to detect the effect of NORAD on cisplatin resistance of A549/DDP cells. NORAD was highly expressed in A549/DDP cells compared with A549 cells. The MTT data showed that knockdown of NORAD enhanced the inhibition rate of cisplatin on the A549/DDP cells and decreased IC50 value. The colony formation and MTT assay suggested that cisplatin inhibited cell proliferation, and knockdown of NORAD enhanced the inhibitory effect of cisplatin on A549/DDP cells. Besides, we found that NORAD silence reduced the P-gp expression but not BCRP, LRP and MRP. Moreover, NORAD could directly bind to miR-202-5p, and ABCB1 was a target of miR-202-5p. The MTT assay found that miR-202-5p inhibitor reversed the effects of NORAD silence on cisplatin resistance of A549/DDP cells. Then, the Western blot data showed that knockdown of NORAD reduced P-gp expression, and miR-202-5p inhibitor enhanced P-gp expression. ABCB1 overexpression reversed the inhibitory effect of NORAD knockdown on A549/DDP cells. Moreover, NORAD could directly bind to miR-202-5p, and ABCB1 was a target of miR-202-5p. Inhibition of miR-202-5p and overexpression of ABCB1 eliminated the effects of NORAD silence on cisplatin resistance of A549/DDP cells. Overexpression of miR-202-5p suppressed P-gp expression in A549/DDP cells. Collectively, our data showed that NORAD could enhance the DDP resistance of A549/DDP cells and potentially increased P-gp expression by sponging the miR-202-5p.

Expression of TS, RRM1, ERCC1, TUBB3 and STMN1 Genes in Tissues of Non-small Cell Lung Cancer and its Significance in Guiding Postoperative Adjuvant Chemotherapy.

BACKGROUND: To explore the expression of TS, RRM, ERCC1, TUBB3 and STMN1 genes in the tissues of patients with non-small cell lung cancer (NSCLC) and its significance in guiding the postoperative adjuvant chemotherapy. MATERIALS AND METHODS: Real time polymerase chain reaction (PCR) was applied to detect the expression of TS, RRM, ERCC1, TUBB3 and STMN1 genes in the tissues of NSCLC patients so as to analyze the relationship between the expression of each gene and the clinical characteristics and to guide the postoperative individualized chemotherapy according to the detection results of NSCLC patients. RESULTS: Expression of TS gene was evidently higher in patients with adenocarcinoma than those with non-adenocarcinoma (P=0.013) and so was the expression of ERCC1 (P=0.003). The expression of TUBB3 gene was obviously higher in NSCLC patients in phases I/II and IV than those in phase III (P1=0.021; P2=0.004), and it was also markedly higher in patients without lymph node metastasis than those with (P=0.008). The expression of STMN1 gene was apparently higher in patients in phase I/II than those in phase IV (P=0.002). There was no significant difference between the rest gene expression and the clinical characteristics of NSCLC patients (P>0.05). Additionally, the disease- free survival (DFS) was significantly longer in patients receiving gene detections than those without (P=0.021). CONCLUSIONS: The selection of chemotherapeutic protocols based singly on patients' clinical characteristics has certain blindness. However, the detection of tumor-susceptible genes can guide the postoperative adjuvant chemotherapy and prolong the DFS of NSCLC patients.

[Technical improvement of mechanical suture of bronchial stumps in pneumonectomy].

OBJECTIVE: To prevent or reduce such postoperative complications of pneumonectomy as bronchopleural fistula and promote the curative effect of the surgery by improving the technique for handling the bronchial stumps. METHODS: In 107 patients, bronchial stapler was adopted for closure of the bronchial stump and pneumonectomy was subsequently performed on the side of the staples. A 1-0 polyester suture was used to for suture in the shape of "U" deep in the mechanical suture on the bronchial stump. The postoperative complications were observed. RESULTS: The operations were performed easily and the bronchial stumps were short and sutured firmly. No fluid retention or granuloma occurred in the stumps after the operation, nor were the complications such as intractable cough and infection of thoracic cavity observed. No bronchopleural fistula was found in these patients. CONCLUSION: This new method is safe and effective for treatment of the bronchial stumps.