Objective To observe the effect of tongue-drawing at lateral position in nasogastric intubation for senile patients with conscious disorders. Methods One hundred senile patients with conscious disorders were randomly divided into observation group and control group with 50 cases in each group. The patients in the control group were given routine nasogastric intubation while those in the observation group were given nasogastric intubation by tongue drawing at the lateral position. The two groups were compared in terms of success rate of intubation, the rate of adverse reactions and intubation effects. Result Compared with the control group, the observation group showed significantly higher in one-time intubation success rate , comfort rate and lower rate of adverse reaction (all P<0.01). Conclusions The nasogastric intubation by tongue-drawing at lateral position is superior to the routine intubation. It can improve the success rate of one-time intubation, decrease the rate of adverse reactions and relieve the pains of patients.

Objective: To evaluate the effects of repeated ultraviolet A (UVA) radiation on DNA damage, repair and replication processes in human skin fibroblasts, and to explore their mechanisms. Methods: Fibroblasts were isolated from the circumcised foreskins of 3 children in the Department of Urological Surgery, Third Affiliated Hospital, Sun Yat-sen University, and subjected to a primary culture. Cultured human skin fibroblasts of 3rd-10th passages were divided into 2 groups: UVA group treated with repeated UVA radiation to establish a chronic photodamaged cell model, and control group receiving no treatment. Cell counting kit 8 (CCK-8) assay, β-galactosidase staining and flow cytometry were performed to assess cellular proliferative activity, and determine the proportion of photoaged cells and apoptosis rate respectively. Reverse transcription reaction was performed to establish a differentially expressed cDNA library, which was then subjected to high-throughput sequencing. The cDNA sequencing results were compared between the control group and UVA group, and the differentially expressed genes were analyzed in Kyoto Encyclopedia of Genes and Genomes (KEGG) database. The data were compared between the two groups by using two independent sample t test. Results: Compared with the control group, the UVA group showed significantly decreased cellular proliferative activity (72.0% ± 5.2% vs. 96.0% ± 3.7%, t = 6.51, P < 0.05) , but significantly increased proportion of photoaged cells (79.7% ± 5.2% vs. 6.4% ± 0.8%, t=24.12, P < 0.05) and apoptosis rate (29.0% ± 3.3% vs. 6.0% ± 5.9%, t= 5.89, P < 0.05) . Among the key enzymes involved in DNA mismatch repair, replication and base excision repair processes, the expression of DNA ligase 1 (Lig1) , ribonuclease (RNase) H2A and helicase Dna2 in the UVA group was 0.47 ± 0.13, 0.44 ± 0.07 and 0.49 ± 0.11 times (all P < 0.01) that in the control group respectively. After the UVA-induced chronic photodamage in the human skin fibroblasts, After the UVA-induced chronic photodamage in the human skin fibroblasts, Lig expression decrease could block DNA single-base excision repair, Lig and Lig1 expression decrease could block DNA multiple-base excision repair, Lig1 expression decrease could block DNA mismatch repair, and RNaseH2A, Dna2 and Lig1 expression decrease could block DNA replication. Conclusion Repeated UVA radiation can change the expression of key enzymes involved in DNA base excision repair, DNA mismatch repair and DNA replication processes in skin fibroblasts, and then affect DNA repair and DNA replication processes in skin fibroblasts.

Objective:To evaluate the efficacy and safety of Hymagic-4D multi-essence (miniHA, acetylated sodium hyaluronate, sodium hyaluronate, sodium hyaluronate cross-linked polymer) on sensitive skin.Methods:The clinical trial was conducted from April 2, 2019 to April 30, 2019 in the Cosmetic Dermatology Laboratory of the Third Affiliated Hospital of Sun Yat-Sen University. A total of 33 subjects (average age of 43±9.5) completed the trial. Subjects diagnosed as sensitive skin according to the criteria were enrolled. Hymagic-4D were randomly applied on one side of the face while macromolecular hyaluronic acid was applied on opposite side for 28 days. Skin biophysical properties, lactic test, clinical efficacy and safety were evaluated by the investigators at day 0, day 7, day 14 and day 28. Skin water content, TEWL and a*value were measured at the same time.Results:Dates showed that at day 7, day 14 and day 28, the a* values on Hymagy-4D using side were 8.54±3.08, 8.87 ±3.21 and 8.39±3.21, lower than that on the side of control 9.48±3.09, 9.51±3.30 and 9.03±2.95 ( P<0.01); skin roughness score, dryness score and erythema score on hymagy-4d using side were significantly lower than before ( P<0.01), and significantly lower than that on the control side ( P<0.01). Hydration, TEWL, pH value, L value and total score of lactic acid tingling test which were significantly improved on both facial skin compared to the baseline ( P<0.05) showed no statistical difference between two facial sides ( P>0.05) during 28-day treatment. Conclusions:This study demonstrates that Hymagic-4D has more effective in repairing skin barrier and inhibiting skin inflammation than single component hyaluronic acid on sensitive skin persons.