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Qingyan Dropping Pills have the effects of relieving wind and heat, detoxifying, and promoting the pharynx. It is commonly used in traditional Chinese medicines to treat acute and chronic pharyngitis, as well as sore throats and dry throats caused by surgery. Recently, many studies have shown that Qingyan Dropping Pills have certain effects on bacteriostasis, anti-inflammatory, antioxidant, and antiviral activities. As the coronavirus disease 2019 (COVID-19) pandemic enters the post-epidemic era, the regular use of drugs for COVID-19 pandemic symptoms has become a new trend. Therefore, there is a good market prospect to explore and develop Chinese patent medicines with antiviral effects. A preliminary study on the herbal formula and material basis of Qingyan Dropping Pills revealed that they have potential for antiviral applications. In this paper, the research on the quality study and antiviral effect of Qingyan Dropping Pills was reviewed, and the research direction of its secondary development was discussed to provide ideas and references for the new use of old traditional Chinese medicines.

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Objective:To evaluate the long-term outcome of Viabahn stent graft in the treatment of complex femoropopliteal occlusive lesions.Methods:From Sep 2013 to Mar 2020, clinical data of TASC C and D femoropopliteal lesions treated with Viabahn were retrospectively analyzed. Patency rates, the freedom rate from clinically-driven target lesion revascularization (F-TLR), limb salvage and survival after five years were calculated.Results:A total of 65 patients (67 lower limbs) were included. 20 limbs were TASC C lesions, 47 limbs were TASC D lesions. The mean lesion length was (29.1±9.4) cm, including 48 chronic total occlusion (CTO) lesions (71.6%) with mean lesion length of (26.1±10.4) cm. Technique success rate was 98.6%. Mean length of stent graft was (31.3±10.1) cm.Major amputation was performed in 4.2% cases within 5 years. All-cause mortality in 5 years was 23.1%. Primary patency rates at 1,3,and 5 years were 76.8%,59.4%,50.9%, Assisted primary patency rates were 88.4%, 83.4%, 83.4% and secondary patency rates were 88.4%, 85.8%, and 85.8% . F-TLR at 1, 3 and 5 year was 88.2%,76.9%,73.1% .Conclusion:Viabahn for complex and long femoropopliteal artery occlusions is an acceptable treatment with fair long-term outcome.

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Aortic dissection (AD) is a life-threatening vascular disease due to the tearing of aortic intimal layer, leading to the formation of pseudocavity. Once the acute progression of dissection happens, serious complications such as rupture and stroke may occur. The current imaging examinations for AD are invasive and may cause adverse effects related to contrast medium, which cannot be used for large-scale screening of AD. The latest studies have found that metabolic processes and metabolites of lipids,saccarides and proteins are involved in the pathogenesis and development of AD. In this article, we review the research progress in the caracteristics of AD related metabolism,summarize changes of specific metabolites in AD,and explore the clinical implication of studies on AD related metaboliome..

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Objective:To explore the clinical characteristics and prognosis of newly diagnosed CD5-positive diffuse large B-cell lymphoma (DLBCL).Methods:The clinical data of 19 newly diagnosed CD5-positive DLBCL patients in Tenth People's Hospital of Tongji University and Ninth People's Hospital of Shanghai Jiao Tong University School of Medicine between January 2015 and December 2018 were retrospectively analyzed. Their clinical characteristics and laboratory indexes were observed; Kaplan-Meier method was used for survival analysis, and Cox proportional risk model was used to make multifactor analysis of the prognostic factors.Results:The median age of 19 newly diagnosed CD5-positive DLBCL patients was 63 years (34-76 years). All 19 patients included 13 cases with Ann Arbor Ⅲ-Ⅳ stage; 12 cases with lactate dehydrogenase higher than the normal value limit, 9 cases with international prognostic index scores ≥ 4, 13 cases with B symptoms, 10 cases with Ki-67 positive index ≥ 80%, 15 cases with more than 1 lymph extra nodal organ involvement and 8 cases with tumor mass (mass diameter ≥ 7 cm). The 2-year progression-free survival (PFS) rate was 47.4% and 2-year overall survival (OS) rate was 63.2%. Univariate analysis showed that Ann Arbor stage, tumor mass, lymph extra nodal involvement and ≥ 4 courses of intrathecal injection were associated with OS (all P < 0.05). Multivariate analysis showed that Ann Arbor stage (stage Ⅰ-Ⅱ vs. stage Ⅲ-Ⅳ: HR = 0.158, 95% CI 0.031-0.803, P = 0.026), tumor mass (tumor diameter < 7 cm vs. tumor diameter ≥ 7 cm: HR = 0.076, 95% CI 0.009-0.637, P = 0.018)and ≥ 4 courses of intrathecal injection (yes vs. no: HR = 9.130, 95% CI 1.062-78.157, P = 0.044) were independent influencing factors for OS. Conclusions:Newly diagnosed CD5-positive DLBCL is highly aggressive and susceptible to extra nodal infiltration. Ann Arbor stage Ⅲ-Ⅳ, tumor mass, and not receiving ≥ 4 courses of intrathecal injection are independent risk factors affecting the prognosis of CD5-positive DLBCL patients.

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Objective:To investigate the effects of curcumin on proliferation, cell cycle, and apoptosis of human thyroid cancer TPC-1 cells.Methods:Logarithmic growth phase TPC-1 cells were treated with 0.0, 7.5, 15.0 and 22.5 μmol/L curcumin for 48 h. Cell proliferation levels were determined using the methylthiazolyl tetrazolium (MTT) assay. Cell cycle and apoptosis levels were measured using flow cytometry. Western blot method was used to determine the expression levels of B cell lymphoma-2 (Bcl-2) and Bcl-2-associated X protein (Bax).Results:The inhibition rates of cell proliferation in 7.5, 15.0 and 22.5 μmol/L curcumin groups were higher than that of 0.0 μmol/L curcumin group ( P < 0.05); the proportion of G0/G1 phase was higher than that of 0.0 μmol/L curcumin group, but the proportions of G2/M and S phase were lower than those of 0.0 μmol/L curcumin group ( P < 0.05); the cell apoptosis rate was higher than that of 0.0 μmol/L curcumin group [(14.13 ± 0.57)%, (25.27 ± 0.62)%, (36.01 ± 0.84)% vs (8.48 ± 0.43)%, P < 0.05]; the protein expression of Bcl-2 was lower than that of 0.0 μmol/L curcumin group, and protein expression of Bax was higher than that of 0.0 μmol/L curcumin group ( P < 0.05). Conclusion:Curcumin can inhibit the proliferation of TPC-1 cells, block the cell cycle in G0/G1 phase, and promote cell apoptosis by downregulating Bcl-2 expression and upregulating Bax expression.

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Objective:To evaluate the mid-term outcome of drug coated balloon (DCB) in the treatment of femoropopliteal artery occlusive disease(FPOD). Methods Clinical date of FPOD patients receiving DCB treatment at Renji Hospital from Dec 2016 to Dec 2020 were retrospectively analyzed . The primary patency, primary assisted patency, secondary patency, free from clinically-driven target lesion revascularization (F-TLR) and the safety outcomes such as perioperative adverse events, major amputation rate and all-cause mortality were calculated. Results:One hurdred and seventy two patients (191 lower limbs) received DCB treatment. Among them, 13 lesions were TASC A (6.8%), 38 lesions were TASC B (19.9%), 98 lesions were TASC C (51.3%), and 42 lesions were TASC D (22.0%). One hundred and twenty six lesions were de novo lesions (66.0%), 33 lesions were in-stent restenosis (17.3%, ISR), and 32 lesions were both de novo lesions and ISR (16.8%). The average length of lesions was (27.8±10.4) mm. Fourty-eight lesions were mildly calcified (25.1%), 20 lesions were moderately calcified (10.5%), and 25 lesions were severely calcified (13.1%). Among de novo lesions, 97 lesions were chronic total occlusion (CTO) lesions (61.4%), and the average length of CTO lesions was (17.2±12.4) cm. The technical success rate was 97.4%.The provisonal stent rate was 22.0%. 12 month and 24 month after operation, the primary patency rate was 68.4% and 55.9%, the primary assisted patency rate was 78.8% and 69.8%, the secondary patency rate was 95.8% and 91.5%, and the F-TLR rate was 85.3% and 81.9%. The de novo lesion subgroup had a 24-month postoperative primary patency rate of 62.7%, while the in-stent restenosis subgroup had a rate of 44.9%.All cause mortality was 13.4% and major amputation rate was 4.7%. Chronic limb-threatening ischemia ( P=0.046) and CTO lesions length ≥15 cm ( P=0.006) were independent risk factors affecting the primary patency rate. Conclusion:DCB is a safe and effective endovascular intervention therapy for the treatment of femoropopliteal artery disease.

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Gastric cancer is the most prevalent gastrointestinal tumor in China， threatening the life and health of patients. Surgery is one of the available therapies， which， however， induces postoperative gastrointestinal dysfunction （PGD） and other common complications. The pathogenesis of PGD is still unclear and no efficient targeted drug is available. In addition， the limited treatment measures fail to effectively improve gastrointestinal function. As a result， patients generally suffer from low quality of life and poor prognosis. In Chinese medicine， PGD belongs to the categories of "vomiting"， "stuffiness and fullness"， "regurgitation"， "abdominal distension"， "intestinal impediment"， and "intestinal accumulation". In recent years， there has been an explosion of research on the PGD of gastric cancer in Chinese medicine， and many research results have been obtained. On this basis， this study introduced PGD in modern medicine， and causes and pathogenesis， syndrome differentiation-based treatment， and clinical studies of PGD. It was found that diverse internal and external treatments are available in Chinese medicine for PGD such as internal use of Chinese medicine， Chinese medicine enema， auricular point seed-embedding， acupuncture， and moxibustion， which feature ease of implementation， small side effects， definite efficacy， and significant effect in combination with other therapies. This paper summarized the ideas and measures for treatment of PGD of gastric cancer by Chinese medicine， the research outcomes， limitations， and research directions， which can serve as a reference for further research on treatment of PGD of gastric cancer by Chinese medicine.

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Objective:To evaluate the efficacy and safety of drug-coated balloon (DCB) with paclitaxel in the treatment of femoropopliteal artery in-stent restenosis.Methods:From Dec 2016 to Jul 2020, clinical and follow-up data of femoropopliteal artery in-stent restenosis (ISR) treated with paclitaxel DCB were retrospectively analyzed.Results:Firty-two patients (56 lower limbs) with femoropopliteal artery ISR underwent DCB therapy. According to Rutherford classification, 1 case was R2 (1.7%), 9 cases were R3 (23.2%), 23 cases were R4 (41.1%), 15 cases were R5 (26.8%) and 4 cases were R6 (7.1%). According to Tosaka classification of ISR, 46 (81.2%)limbs were Tosaka Ⅱ, 10(17.9%)limbs were Tosaka Ⅲ Mean lesion length of ISR was (240±122)mm. Bail-out stent implantation was performed in 25% cases. The median follow-up time was 18 months. The all-cause mortality rate was 11.8%, the major amputation rate was 5.9%, the primary patency rate was 53.4%, the primary assisted patency rate was 67.1%, the secondary patency rate was 93.2%, and the F-TLR was 77.2%.Conclusion:DCB is a safe and effective endovascular therapy for femoropopliteal artery ISR.

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Objective: Taxifolin is a natural flavonoid compound that can be isolated from onions, grapes, oranges and grapefruit. It also acts as a medicine food homology with extraordinary antioxidant and anti-inflammatory activity. This study aims to explain the protective effects and potential mechanisms of taxifolin against inflammatory reaction. Methods: Levels of interleukin (IL)-6, IL-1β and intracellular reactive oxygen species (ROS) were assessed in different time after the treatment of taxifolin in RAW264.7 cells induced by lipopolysaccharide (LPS). Subsequently, the mRNA and protein levels of inducible nitric oxide synthase (iNOS), vascular endothelial growth factor (VEGF), cyclooxygenase (COX)-2, tumor necrosis factor (TNF)-α and the phosphorylation expression levels of the MAPK signal pathway were also evaluated. A silico analysis was used to explain the binding situation for the investigation of taxifolin and MAPK signal pathway. And then MAPK inhibitors were used to reveal the expression level of iNOS, VEGF, COX-2 and TNF-α in RAW264.7 cells. Results: It was demonstrated that cell inflammatory damage induced by LPS was significantly alleviated after the treatment of taxifolin. Then, the mRNA and protein levels of iNOS, VEGF, COX-2 and TNF-α were reduced and the phosphorylation expression levels of the MAPK signal pathway were down-regulated remarkably as well. In silico analysis, taxifolin could form a relatively stable combination with MAPK signal pathway. MAPK inhibitors showed increasing or decreasing effect in the mRNA levels of iNOS, VEGF, COX-2 and TNF-α, which suggesting that taxifolin down-regulated iNOS, VEGF, COX-2 and TNF-α expressions were not entirely through the MAPK pathway. Conclusion: This finding demonstrated that taxifolin improved the inflammatory responses that partly involved in the phosphorylation expression level of MAPK signal pathway in RAW264.7 cells exposed to acute stress.

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Objective:To evaluate the efficacy and safety of drug-coated balloon (DCB) with paclitaxel in the treatment of femoropopliteal arteriosclerosis obliterans (ASO).Methods:From Dec 2016 to Dec 2018, clinical data of femoropopliteal artery disease patients treated with paclitaxel DCB in Renji Hospital, School of Medicine, Shanghai Jiaotong University were retrospectively analyzed.Results:A total of 83 patients (95 lower limbs) underwent DCB therapy. Including 50 chronic total occlusion (CTO) lesions (52.6%) with mean lesion length of (18.35±10.61) cm. Twenty-four lesions (25.3%) were moderately or severely calcified. Bail-out stent implantation was performed in 29.5% cases. The mean follow-up time was 17.5 months. Twelve months after intervention, the all-cause mortality rate was 6.0%, the major amputation rate was 4.3%, the primary patency rate was 60.6%, the primary assisted patency rate was 72.4%, the secondary patency rate was 83.4%, and the freedom rate from clinically-driven target lesion revascularization(F-TLR) was 77.0%. Moderate to severe calcification was an independent risk factor for the primary patency of DCB therapy.Conclusion:DCB is a safe and effective endovascular therapy for femoropopliteal artery disease.

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Immune checkpoints are the crucial regulators of immune system and play essential roles in maintaining self-tolerance, preventing autoimmune responses, and minimizing tissue damage by regulating the duration and intensity of the immune response. Furthermore, immune checkpoints are usually overexpressed in cancer cells or noninvasive cells in tumor tissues and are capable of suppressing the antitumor response. Based on substantial physiological analyses as well as preclinical and clinical studies, checkpoint molecules have been evaluated as potential therapeutic targets for the treatment of multiple types of cancers. In the last few years, extensive evidence has supported the immunoregulatory effects of traditional Chinese medicines (TCMs). The main advantage of TCMs and natural medicine is that they usually contain multiple active components, which can act on multiple targets at the same time, resulting in additive or synergistic effects. The strong immune regulation function of traditional Chinese medicine on immune checkpoints has also been of great interest. For example,

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Brain image segmentation algorithm based on deep learning is a research hotspot at present. In this paper, firstly, the significance of brain image segmentation and the content of related brain image segmentation algorithm are systematically described, highlighting the advantages of brain image segmentation algorithms based on deep learning. Then, this paper introduces current brain image segmentation algorithms based on deep learning from three aspects: the brain image segmentation algorithms based on problems existent to brain image, the brain image segmentation algorithms based on prior knowledge guidance and the application of general deep learning models in brain image segmentation, so as to enable researchers in relevant fields to understand current research progress more systematically. Finally, this paper provides a general direction for the further research of brain image segmentation algorithm based on deep learning.

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Objective To establish assay methods for the determination of dissolution,content and related substances of vita-min K1 self-nanoemulsifying drug delivery system(VK1-SNEDDS),and investigate the physico-chemical properties of the preparation. Methods The UV method was established to determine the dissolution of VK1-SNEDDS. The content and related substances were de-termined by HPLC. The appearance,self-emulsification time,micro-morphology,droplet size and zeta potential were also investigat-ed. Results The linearity range of established UV and HPLC methods was 0.85-20.4 and 2.16-216μg/ml,respectively,and all the recovery,precision,specificity and sensitivity met requirements. VK1-SNEDDS could disperse quickly after dilution. The transmission electron microscope(TEM)image of the optimized liquid SNEDDS showed that most of the emulsion droplets were of uniform size with no signs of coalescence. Droplet size of optimal formulation was revealed as 47.74 nm with polydispersibility index(PDI)of 0.248,and zeta potential was found to be-20.53 mV. Conclusion VK1-SNEDDS could form homogeneous and stable nanoemulsion when dilut-ed with aqueous phase and increase the dissolution of lipophilic drug. The methods are reliable,accurate and suitable for quality con-trol of VK1-SNEDDS.

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Objective@#To explore the relationship between venous blood routine test parameters and syncopal recurrence of children with vasovagal syncope (VVS).@*Method@#Sixty-three children (male 32, female 31) diagnosed as VVS in Department of Pediatrics, Peking University First Hospital from November 2010 to October 2015 were included in a case observational study.Their mean age was (11.2±2.7) years and basic treatment such as predisposing causes avoiding, standing training, autonomic nervous function exercise and oral rehydration salts were advised to them.The clinical data were obtained by out-patient visit and over telephone from December 2015 to January 2016, with a median follow-up period of 10 (4, 26) months. The effects of baseline venous blood routine test parameters, gender, age, and body mass index (BMI) on syncopal recurrence were studied via univariate and multivariate Cox regression analysis.Kaplan-Meier curve was used to evaluate the long-term prognosis.@*Result@#Among the 63 VVS children in this study, 31 cases were diagnosed as VVS vasodepressor type, 4 cases as VVS cardioinhibitory type and 28 cases as VVS mixed type, 16 cases (25%) had experienced recurrence of syncope while 47 cases (75%) had not.The result of univariate analysis of Cox regression showed that baseline platelet count (PLT) (HR=1.012, 95%CI: 1.003-1.022) had a marked impact on the survival rate.And the result of multivariate analysis of Cox regression showed that baseline hemoglobin concentration (HGB) (HR=1.055, 95%CI: 1.007-1.105), mean corpuscular hemoglobin (MCH) (HR=0.612, 95%CI: 0.423-0.884) and PLT(HR=1.015, 95%CI: 1.006-1.024) had significant effects on survival rate of VVS children.In this study, the one-year, two-year, and three-year survival rate were 83% (52/63), 79% (50/63) and 75% (47/63), respectively.@*Conclusion@#The baseline venous blood routine test parameters HGB, MCH and PLT might be the influencing factors of the syncopal recurrence of VVS children.

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Phospholipids are the major components of the biomembrane. Combining the phospholipids and the drugs to form drug-phospholipid complex can improve the solubility,stability and bioavailability of the drugs. On this basis,the nanodrug delivery system,which is constructed with the drug-phospholipid complex as an intermediate carrier,has become a research hot spot in the field of pharmaceutics. This kind of nanodrug delivery system can not only improve the solubility,stability and bioavailability of drugs,but also carry out the targeted drug delivery,decrease the drug dose and reduce the side effects,thereby it is very promising. In this review,we describe the structural composition,characteristics,forming mechanism of the drug-phospholipid complex and the research progresses in a variety of nanodrug delivery systems based on drug-phospholipid complex.

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Objective To study the effect of skin protective membrane, semi-transparent dressing and combination of the two in critically ill patients with incontinence associated dermatitis (IAD) skin protection. Methods A total of 114 patients who were admitted into ICU and NICU of Hebei Xingtai People′s Hospital from December 2013 to November 2014 were selected. These subjects were divided into 3 groups randomly. All three groups received routine skin care, on this basis, skin protective membrane group (34 cases) used skin protective membrane for skin protection, semi-transparent dressing group (40 cases) adopted semi-permeable dressing for skin protection, while the combination group (40 cases) used skin protective membrane combined with semi-transparent dressing for skin protection. The incidence, occurrence and severity of IAD in the three groups were compared. Results The incidence rate of IAD in the combination group was 20.0%(8/40), 20.6%(7/34) in the skin protective membrane group, and significantly lower than 47.5% (19/40) in the semi-transparent dressing group, the difference was significant ( χ2=9.201, P<0.05). The occurrence time of IAD in the combination group was (4.75±0.46) days, which was significantly longer than those of the skin protective membrane group [(3.86±1.35) days] and the semi-transparent dressing group [(2.74±0.73) days], the difference was significant (F=17.120, P < 0.05). The IAD severity of the combination group scored 3.63 ±0.92, which was significantly lower than those of the skin protective membrane group (5.29±1.11) and the semi-transparent dressing group (6.74±1.79), the difference was significant (F=12.240, P<0.05). Conclusions Skin protective membrane combined with semi-transparent dressing have priority in decreasing IAD incidence rate, and delaying the occurrence time of IAD, and relieving the severity of IAD, which is better than either of the two.

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Objective To investigate the effect of different additional filtration thickness of DSA on image quality and radiation dose with cerebral angiography. Methods Prospective collected 90 patients with DSA examination of the whole cerebral artery, patients were divided into A, B and C group according to the time of the examination, each group included 30 cases. Patients underwent conventional DSA, the additional filtration of group A, B and C were (1.0 mmAl+0.1 mmCu), (1.0 mmAl+0.4 mmCu) and (1.0 mmAl+0.9 mmCu), respectively. Dose area product (DAP), air kerma (AK), tube current and tube voltage of anteroposterior and lateral radiography of the whole brain were recorded, and scored the image quality. Eye lens organ dose values were obtained by using simulation phantom and LiF dosemeter under A, B and C groups with three different additional filtrations for cerebral angiography. The image quality scores and the radiation dosewere analyzed by one-way ANOVA tests or Kruskal-Wallis tests. Results The image quality comprehensive score of three groups showed significant difference (F=40.07,P<0. 01), which were (3.8±0.4), (3.6 ± 0.5) and (3.0 ± 0.6), respectively. The DAP and AK value of anteroposterior and lateral radiography of three groups also showed significant difference (P<0.05), B and C group were lower than the A group. Left and right eye lens organ dose were decreased along with the increase of the additional filtration thickness, and the difference between the 3 groups also had significant difference (P<0.01). Conclusion Both the image quality and radiation dose can acquire when conducted the whole brain DSA with 1.0 mmAl+0.4 mmCu additional filtration.

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Objective To investigate the lens and pituitary dose impacted by additional filtration and collection field in head and neck DSA examinations. Methods All images were acquired by a Philips ALLura Xper FD 20 DSA machine. The combination of the different collection fields (48 cm, 42 cm, 31 cm, 22 cm) and additional filtrations (0.9 mmCu+1.0 mmAl, 0.4 mmCu+1.0 mmAl, 0.1 mmCu+1.0 mmAl) were adjusted when the anthropomorphic phantom filled with dosimeter was scanned in anterioposterior and lateral positions with 2D?DSA and 3D?DSA. The dose area product (DAP), air kerma (AK) and the radiation dose values of bilateral lens and pituitary were measured and recorded. The 2D and 3D?DSA regional absorption dose on lens and pituitary were analyzed using t' test, the correlations between DAP and AK parameters and different regional absorption doses were evaluated by Pearson rank correlation coefficient. Results Absorption doses of left lens, right lens and pituitary with 2D?DSA (n=12) were as following:(2.77 ± 0.68), (6.23 ± 3.54), (8.65 ± 2.62) mGy, while the parameters with 3D?DSA (n=12) were (1.78 ± 0.82), (2.18±1.15), (3.32±0.64) mGy, respectively;the results revealed a significant difference (t'=3.20, 3.76 and 6.85, P<0.01). DAP [(8 739±5 731) mGy·cm2] had a relationship with absorption dose of pituitary, left lens and right lens [(5.988 ± 3.299),( 2.258 ± 0.872),( 4.207 ± 3.303) mGy, r values were 0.766, 0.684, 0.727; P<0.01]. AK values was (31 ± 23) mGy and it had a relationship with pituitary absorption dose (r value was 0.894, P<0.01). The lens dose was reduced when the additional filtration was increased and the collection field was decreased, the radiation dose of the pituitary was reduced when both the additional filtration and the collection field were increased. Conclusions In the head and neck DSA examinations, the radiation dose of the lens and the pituitary had different changes with the different additional filters and collecting fields. The organ dose with 3D?DSA was significantly less than that with 2D?DSA.

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Objective To find a safer and more effective facial care method,reduce the incidence rate of facial skin injury,and improve patients' comfort level,as well as work efficiency of nursing.Methods 90 patients with orotracheal intubation were divided into the control group,transparent dressing group and skin protecting membrane group by random number table method.The control group was conducted with basic facial nursing;the transparent dressing group was applied with protective transparent dressing on the basis of basic facial nursing;the skin protecting membrane group was applied with skin protecting membrane on the basis of basic facial nursing.This research was conducted by observing and recording the incidence rate of skin injury,severity of skin injury,patients' comfort level,duration of skin care and the results.Results The incidence rate of facial skin injury was as follows:skin protecting membrane group 6.89％ (2/29)and transparent dressing group 15.15％(5/33)were better than the control group 50.00％(14/28),statistical significance was found among the three groups (X2=16.75,P ＜ 0.05);The times of facial skin nursing was as follows:the skin protecting membrane group (4.28±0.53) times was less than transparent dressing group (4.52±0.76) times and the control group (6.04±1.35) times,statistical significance was found among the three groups (Hc=32.65,P ＜ 0.05).Patients' comfort level comparison were as follows:the skin protecting membrane group was better than transparent dressing group and the control group,statistical significance was found among the three groups (Hc=22.42,P ＜ 0.05);Duration of skin care were as follows:skin protecting membrane group (10.40±1.35) minutes was less than transparent dressing group (14.09±1.27) minutes and the control group (12.35±1.28) minutes,statistical significance was found among the three groups (F=85.87,P＜ 0.05).Conclusions Skin protective membrane can effectively reduce the incidence and severity of facial skin injury on patients with orotracheal incubation,improve patients' comfort level,and greatly reduce operation time for nurses through its easer operation and less time consumption.

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Objective To establish an HPLC method for determination of related substances of dexmethylphenidate hydrochloride and their content .Methods The HPLC method was used on an Agilent ZORBAX SB-C18 column with a mo-bile phase of methanol-0.2%triethyl citrate in 25 mmol/L potassium dihydrogen phosphate ( pH was adjusted to 3.5 with phosphoric acid) (35∶65) at a flow rate of 1.0 ml/min.The detection wavelength was 209 nm and column temperature was 40℃.Results Under the selected chromatographic condition , dexmethylphenidate hydrochloride was completely separated from impurity.The limit of detection was 81.12 ng/ml.The calibration curve was linear in the range of 2-30 μg/ml ( r=0.9995).The average recovery of the method was 100.83%, and the stability of the working solution was acceptable in 12 h(RSD=0.10%).Conclusion This method is simple,specific,accurate and suitable for analyzing the related substances and their content in dexmethylphenidate hydrochloride .