Simulation of Droplet Impact onto Horizontal and Inclined Solid Surfaces with Lattice-Boltzmann Method

In this paper,the lattice-Boltzmann method is used to investigate the droplet dynamics after impact on horizontal and inclined solid surface. The two-phase interparticle potential model is employed. The model is found to possess a linear relation between the macroscopic properties( surface tension σ and contact angle α)and microscopic parameters( G,G t). The flow state of the droplet on the surface is analyzed in detail,and the effects of surface characteristic,impact velocity,impact angle,the viscosity and surface tension of the liquid are investigated,respectively. It is shown that the lattice-Boltzmann method can not only track exactly and automatically the interface,but also the simulation results have a good qualitative agreement with ones of the previous experimental and numerical studies.

Meta-analysis of clinical efficacy and safety of kidney Tonifying therapy in the treatment of interstitial lung disease

Objective:To evaluate the efficacy and safety of kidney tonifying therapy in the treatment of Interstitial Lung Disease(ILD).Methods:We searched Wanfang Data,CNKI,CBM,VIP,Pub Med,EMBASE,Web of science and Cochrane Library for Randomized Controlled Trials(RCTs)of kidney tonifying therapy in the treatment of ILD.The retrieval time was from the establishment of the database to December 15,2020.Rev man 5.3 software was used to analyze and summarize the collected literature,and the methodological quality of the included studies was evaluated by the bias risk assessment scale of Cochrane Collaboration Network.Results:A total of 15 articles with 1045 patients were included.The results of meta-analysis showed that compared with the control group treated with conventional western medicine alone,kidney tonifying therapy or combined with conventional western medicine was beneficial to improve the clinical total effective rate[RR=1.33(95%CI 1.24-1.43),P<0.00001].At the same time,compared with the control group treated with routine western medicine,kidney tonifying therapy or combined with routine western medicine can improve cough and wheezing symptoms of patients[MD=-0.62(95%CI-0.78~-0.46),P<0.00001]and MD=-0.79(95%CI-0.18~-0.49),P<0.00001].However,there was no significant improvement in 6-minute walk test and lung function(DLCO%)(P>0.05);only one study reported 7 patients with adverse reactions,but after corresponding treatment,the symptoms were significantly relieved.The analysis of the characteristics of intervention measures in the treatment group showed that there were a total of 80 traditional Chinese medicines involved,of which Shu Dihuang appeared the most frequently,and the tonic drugs were used the most.The two meridians of the lung and kidney appear most frequently.Among the four qi and five flavors,warm and sweet medicines have the highest frequency.Conclusion:Adopting kidney-tonifying method or combined with conventional Western medicine treatment can improve the total clinical effectiveness of patients.Adopting kidney-tonifying method or combined with conventional Western medicine treatment to improve symptoms such as coughing and wheezing.No serious adverse reactions have been reported,and the safety is reliable.Due to the low quality of the included literature,the results of this study need to be verified by high-quality,large sample randomized controlled trials.

Respiratory Failure, Hepatic Failure, and Hemoptysis with Thrombocytopenia in a 79-Year-Old Man

To the Editor： Langerhans cell histiocytosis （LCH） is a rare disease that usually occurs in the first two decades of life. Multisystem-LCH （MS-LCH） mainly affects youth. Bone, lung, and skin are the most common systems involved. Here, we report a case from China of MS-LCH in a 79-year-old patient with bone marrow, liver, spleen, and lung involvement, but without bone and skin involvement.

Successful Treatment of Coronavirus Disease with Integrated Traditional Chinese and Western Medicine: A Case Report

Background:Coronavirus disease(COVID-19)is a new outbreak infectious disease,caused by severe acute respiratory syndrome coronavirus 2.Nearly 80,000 people have got infected in China in just 2 months.Up to now,there still has no specific effective treatment for this disease.While integrated traditional Chinese and Western medicine has definite curative effect,could significantly reduce the disease mortality and shorten the course of treatment.Case Report:Here we report a 31-year-old female case of COVID-19 in a family cluster in Beijing.She reported low fever,cough with a little white sputum,fatigue,watery diarrhea,anorexia on admission.The COVID-19 in Traditional Chinese Medicine(TCM)belonged to plagues caused by dampness toxin.The patient was treated with TCM from dampness combined with antiviral drug abidol.After four visits,the patient was significantly improved with symptoms disappearing,chest-computed tomography dissipating,viral nucleic acid turning negative.She discharged and donated 200 ml convalescent plasma after 19 days hospitalization.Conclusion:The present case demonstrated that integrated traditional Chinese and Western medicine could treat COVID-19 effectively.However,clinical randomized controlled trials are warranted to verify the precise clinical efficacy.