In medicine, if not a problem, then the task of disinfecting catheters and similar equipment, which is designed for long contact with the human body. When the catheter is inserted, the skin is broken, a hole in the protection is formed in a direct sense, which creates a risk of infection. Columbia University offered the technology of sterilization of catheters right at the time of operation, without harm to the patient.
Ultraviolet radiation is detrimental to microbes, this fact, but it is dangerous for human eyes and skin too. Therefore, direct disinfection through exposure to UV light from living people is not recommended. However, scientists from Columbia University managed to find a narrow band of the spectrum, when UV radiation still kills germs, but is too weak to penetrate the dead outer skin layer or the mucous membrane of the eye. Weapons against bacteria, harmless to humans.
But how to apply UV rays exactly to the wound, to a tiny area already filled with a catheter installed there? Through a modified optical fiber, flexible and with such a reflection coefficient that the light is partially radiated outward as it passes through the fiber. When the fibers were poured through a tube with microbial cultures resistant to methicillin Staphylococcus aureus, after the UV radiation was applied, the bacteria died out along the entire length of the fibers. It only remains to mount the fiber into the catheter itself and periodically switch on ultraviolet light to sterilize the puncture in the patient's skin.
While scientists are just getting ready for experiments on animals, plus they reflect on how to make generators of special UV radiation compact and cheap. However, the discovery itself inspires – a new method of sterilization can give impetus to the creation of new medical instruments.js.src = “&version=v2.8”; 'script', 'facebook-jssdk'));