544 Vasculitic Subglottic Stenosis: A Question of Immunosuppression?

Introduction Subglottic stenosis (SGS) is the commonest manifestation of tracheobronchial disease in granulomatosis with polyangiitis (GPA) and carries a high degree of morbidity. Management of SGS-GPA is a double-edged sword. Delayed treatment may cause respiratory compromise and infectious complications. However, aggressive surgical management may initiate a systemic inflammatory response, reactivating the vasculitic cascade and potentially lead to long-term complications including renal vasculitis and consequential end-stage renal failure. There is currently no internationally agreed management strategy for this disease. Method This retrospective review was undertaken to analyse our unique combination of surgical dilatations and immunosuppressive-focused adjuvant management strategy between years 2011-2020. Results Sixteen of our one hundred and nine GPA patients (14.7%) had SGS and were included in our analysis. Whilst three patients (18.8%) improved solely on medical treatment, thirteen (81.3%) required combined surgery and immunosuppression (consisting of cyclophosphamide or Rituximab regimens). Thirty-nine surgical dilatations and two tracheostomies were performed over a mean 53-month follow-up period, with a calculated mean procedure rate of one every 24.8 months (2.7 - 89 months). Conclusions Our current management strategy affords a lower procedure rate at every 24.8 months compared to other published studies with combined procedure rate at every 14.9 months.

Coronary artery bypass grafting with surgical ventricular reconstruction

The increase in left ventricular volume after a myocardial infarction is a component of the remodelling process leading to heart failure and it is associated with poor clinical outcomes. Hence, the current management strategy for ischaemic left ventricular dysfunction has been aimed to reverse the remodelling process by medical therapy, devices and/or surgical strategies. Surgical ventricular reconstruction, usually combined with myocardial revascularization, has been introduced as an optional therapeutic strategy aimed to reduce the left ventricle through the exclusion of the scar tissue. Surgical ventricular reconstruction is recommended in selected heart failure patients, especially if a postoperative left ventricular end-systolic volume index less than 70 mL/m2 can be predictably achieved, because a smaller residual volume is associated with improved survival. This chapter briefly discusses the rationale to surgically reverse left ventricular remodelling, the technique, and the indications to the best of the authors’ knowledge, coming from one of the centres with the most experience in SVR worldwide.

Management strategies and prediction of COVID-19 by a fractional order generalized SEIR model

In this project, we study a class of fractional order generalized SEIR epidemic models. Based on the public data from Jan. 22th to May 15th, 2020, we reliably estimate key epidemic parameters and make predictions on the peak point and possible ending time for the target region. We analyze the current management strategy and predict the future implementation of different management strategies. Numerical simulations which support our analysis are also given.

Potential role of medicinal plants and their constituents in the mitigation of SARS-CoV-2: identifying related therapeutic targets using network pharmacology and molecular docking analyses

Since the outbreak of Coronavirus disease (COVID-19) caused by SARS-CoV-2 in December 2019, there has been no vaccine or specific antiviral medication for treatment of the infection where supportive care and prevention of complications is the current management strategy.