8
Welch Allyn Ear Wash System
Using the Ear Wash System
Steps for Irrigation
It is essential to follow the technique described in this section for using
the Ear Wash System to minimize patient discomfort and avoid the risk of
perforating the tympanic membrane.
The factors determining the risk of perforating the tympanic membrane
while irrigating the ear canal are the water pressure at the point of
discharge and whether the discharged flow of water directly impinges on
the tympanic membrane.
The typical range of water pressure at the point of discharge in the ear tip
of the Ear Wash System is 10 - 13 PSI. There is great variability among
patients regarding susceptibility to perforation of healthy tympanic
membranes by pressure. Present evidence suggests that a water
pressure of 13 PSI may be capable of perforating healthy tympanic
membranes in a very small percentage of patients, estimated to be less
than.05%, if the water flow directly impacts the tympanic membrane.
This small risk is avoidable if the water flow is directed to impact the wall
of the ear canal, so that only indirect turbulent flow reaches the tympanic
membrane. This technique will also minimize patient discomfort.
Pre-Treatment Procedure
Carefully grasp the pinna and administer the ear
wax softener, which will enhance performance.
