COVID-19 is a virus of the coronavirus class, which are RNA viruses with protective protein shells that are transmitted between humans, animals and birds. This class of viruses causes respiratory and other diseases. The symptoms of the disease are similar to those of influenza, but the disease devel

The most common type of examiner used to examine the retina at the back of the eye consists of a concave mirror that reflects a small light from within the instrument. The doctor examines the eye by looking directly into the patient's eye through a monocular eyepiece. This is possible by rotating th

A tracheal intubation is a flexible plastic tube that is passed through the mouth into the trachea (windpipe) to help the patient breathe. The tracheal intubation tube is then connected to a ventilator that delivers oxygen to the lungs. The process of inserting the tube is called endotracheal intuba

A urine bag is a sterile plastic bag for collecting urine. Indwelling catheterization is one of the most common and frequently applied nursing operations in order to accurately record urine volume and solve the patient's difficulty in urination, and the urine collection bag is a necessary item for i

Cotton roll is made of skimmed cotton gauze processing, good breathability, strong water absorption, easy to use, fully automatic equipment folding, stacking piece evenly and neatly. Cotton roll is a more traditional disposable medical material, most used in the pharmaceutical and health industry. T