Chinese Expert Consensus on Critical Care Ultrasound Applications at COVID-19 Pandemic

The spread of new coronavirus (SARS-Cov-2) follows a different pattern than previous respiratory viruses, posing a serious public health risk worldwide. World Health Organization (WHO) named the disease as COVID-19 and declared it a pandemic. COVID-19 is characterized by highly contagious nature, rapid transmission, swift clinical course, profound worldwide impact, and high mortality among critically ill patients. Chest X-ray, computerized tomography (CT), and ultrasound are commonly used imaging modalities. Among them, ultrasound, due to its portability and non-invasiveness, can be easily moved to the bedside for examination at any time. In addition, with use of 4G or 5G networks, remote ultrasound consultation can also be performed, which allows ultrasound to be used in isolated medial areas. Besides, the contact surface of ultrasound probe with patients is small and easy to be disinfected. Therefore, ultrasound has gotten lots of positive feedbacks from the frontline healthcare workers, and it has played an indispensable role in the course of COVID-19 diagnosis and follow up

A conditional role-involved purpose-based access control model

This paper presents a role-involved conditional purpose-based access control (RCPBAC) model, where a purpose is defined as the intension of data accesses or usages. RCPBAC allows users using some data for certain purpose with conditions. The structure of RCPBAC model is defined and investigated. An algorithm is developed to achieve the compliance computation between access purposes (related to data access) and intended purposes (related to data objects) and is illustrated with role-based access control (RBAC) to support RCPBAC. According to this model, more information from data providers can be extracted while at the same time assuring privacy that maximizes the usability of consumers' data. It extends traditional access control models to a further coverage of privacy preserving in data mining environment as RBAC is one of the most popular approach towards access control to achieve database security and available in database management systems. The structure helps enterprises to circulate clear privacy promise, to collect and manage user preferences and consent

Thrombotic Thrombocytopenic Purpura Revisited: Upshaw Schulman Syndrome in a 20-Year-Old Male

Case Report A 20-year-old male with no significant past medical history presented to an outside hospital with a two-week history of progressive fatigue, malaise and decreased appetite. Prior to these events, he had been in his usual state of health with normal exercise tolerance and energy level. Upon development of his symptoms, the patient felt as though he had developed an upper respiratory infection (URI). The URI symptoms eventually resolved; however complaints of fatigue and malaise still remained. He then developed progressive dyspnea on exertion and tea-colored urine. The patient reported a singular febrile episode to 38.9˚C associated with nonbilious vomiting two days prior to admission. Upon further questioning, he admitted to a twenty-pound weight loss over the last month. The patient’s mother also noticed unprovoked bruising on his forearms bilaterally. He denied night sweats, gingival bleeding, epistaxis, hematuria, or melena