Leak Testing to Prevent Fluid Invasion
As we have learned so far, flexible endoscopes are subject to severe damage from fluid invasion. Fortunately, endoscope manufacturers have developed a tool for inspecting scopes for leaks, so we can prevent or minimize effects of fluid invasion. Leak testing allows a user to find potential leaks prior to immersing the scope in fluid. When performed correctly, and at the correct point in every reprocessing cycle, leak tests can eliminate all but the most extreme circumstances for fluid invasion. This, in turn, helps decrease scope damage and cross contamination of patients.
There are two different leak testing methods: The handheld method may also be referred to as manual or dry leak testing; the automated method may also be called mechanical or wet testing. A handheld leak test uses a hand-held bulb and pressure gauge, and the scope might not immersed in fluid. An automated leak test uses an automated pressure delivery system and the scope is totally immersed. A “positive leak test” is one in which a leak was found. If no leak is found, the scope is said to have had a “negative leak test”. You might also say that a scope has “passed” a test (no leak) or “failed” it (leak).
The steps for each type of leak test should be carefully followed. Eliminating steps or performing some steps out of sequence may cause a false reading (and failure to detect a leak). A leak test should be performed after each procedure and prior to immersing the endoscope in fluid. Remember, a leak can occur at almost any point in the daily life cycle of the scope.Next Page: Handheld Leak Testing
