Welch Allyn Ear Wash System 29350 - User Manual - Manual (Page 11)

7
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 dis-
charge 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 mem-
branes 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.