Atos Medical PROVOX LaryButton Instrucciones De Uso página 12

2. Instructions for use
2.1 Preparation
Choosing correct size
Diameter: To achieve an airtight fit and good retention the
diameter of the Retention Collar of the LaryButton should exceed
the diameter of the tracheostoma entrance. This is especially
important for hands-free speech. Measure the size of the
tracheostoma (largest diameter) with a ruler and fit the Provox
LaryButton accordingly. In irregularly shaped tracheostomas,
it may be difficult to achieve an airtight fit. Selection of a too
small diameter will lead to a too loose fit; the device may fall
out or air may escape when speaking. Selection of a too wide
LaryButton may irritate or damage the tracheostoma.
Length: In most cases the shorter size where the Retention
Collar of the Provox LaryButton fits right behind the edge of
the tracheostoma will provide a correct fit. However if the
device is too short it may fall out of the tracheostoma.
To help to choose what size(s) of LaryButton to prescribe
to the patient, the clinician can use a Provox LaryButton Sizer
Kit. The Sizer Kit contains samples ("sizers") of commercially
available Provox LaryButtons.
CAUTION: During fitting always make sure that the LaryButton
does not reach the tracheal flange of the voice prosthesis.
Optimal fit and performance of the Provox LaryButton is
achieved if the patient has a so-called "tracheostoma lip" that
is situated uniformly around the tracheostoma.
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