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Aural Impressions
Describes BSA procedure for taking an Aural impression
| Question | Answer |
|---|---|
| Explanation should include... | Procedure you will use, Warning of fullness in the ear and muffled sound, cough reflex on insertion of otostop, Enhancement of tinnitus, Not talking, Raising hand if discomfort CONSENT |
| Audiologist should ask... | Recent ear infections or pain and Ear surgery, |
| First thing to do? | Wash hands |
| Next? | Otoscopy |
| Contraindications for taking an aural impression | post operative ears, active infection, (perforation),Excessive wax, foreign object,(stenosis) |
| What should be placed on the shoulder? | Towel or tissue |
| What should you do in the case of excess hair? | Trim with a pair of round nosed scissors o flatten stubble with petroleum jelly |
| What should you be wary of when using petroleum jelly? | Allergies and crating a air tight seal leading to barotrauma |
| What should happen to the hearing aid? | Placed behind ear during impression taking |
| What size otostop? | Select size from indications during otoscopy, |
| Before insertion of the otostop? | Knot strings |
| How to put in? | Place in the external auditory meatus and loop strings over the pinna, push in gently with the earlight |
| How to check it is far enough? | Check with otoscope |
| What should you see? | Flush with the sides of the ear canal - no gaps and beyond the second bend |
| Condensation impression material is? | Large amount of silicone and small amount of coloured putty from tube |
| Addition impression material is? | Two components in equal parts |
| Why is addition preferred? | Easier mixing, long term stability, better flow properties (too much hardener) |
| What should the material look like after mixing? | Smooth continuous colour with no marbling, not too dark with condensation as causes it to harden too quickly |
| What to do before inserting the syringe into the ear? | Squeeze material all the way down the syringe and expel some onto the tissue |
| Where do we start the impression? | In the ear canal close to the otostop |
| How do we fill the concha? | expel material until the inferior edge of the Concha is filled and then move up to the Crus of Helix to fill the superior portion |
| What happens if the concha is overfilled? | The weight of expelled material will distort the shape of the pinna and the impression will be wrong |
| What happens if the concha is underfilled? | The manufacturer will find it hard to place the antihelix, which may result in an uncomfortable earmold |
| How do we know when the impression has set? | When a fingernail makes no mark |
| How to take the impression out? | Pull back pinna, twist towards nose, and ease out |
| What next? | Check the ear with an otoscope to see if all has been removed and evaluate impression |
Created by:
Youworktoohard
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