Lyme disease is diagnosed clinically based on symptoms, objective physical findings (such as EM, facial palsy, or arthritis), or a history of possible exposure to infected ticks, as well as serological blood tests. The EM rash is not always a bull's eye, i.e., it can be solid red.
Rule of Thumb for Changing Filters. The rule we have followed for 18 years in the filtration industry is to change filters every 6 to 12 months. Six months is almost always optimum, especially in commercial/office settings, and twelve months is as long as you want to go no matter what.
Report Abuse. 1  Change filters regularly. Nasal Cannula should be replaced monthly. 2  No longer than 24 hours before changing. My dad had a rare form of asthma for 15 years and was on oxygen. 3  we told patients to change them every week and rinse them daily. Tubing should be changed every month OR when cinks develop. humidiifier bottle, if you have one should be filled twice daily and washed every few days.