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Bone Anchored Hearing Systems - Principles and Candidacy

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1.  From an audiological standpoint, which of the following hearing profiles are typical candidates for a BAHS device? Presbyacusis Conductive/mixed hearing loss hearing loss Unilateral profound sensorineural hearing loss Both B and C

2.  A BAHS device can only be fitted if: The patient is at least 18 years old The air-bone gap is strictly 30 dB or more The bone conduction average is below 65 dB HL Both B and C

3.  A patient with a purely sensorineural hearing loss who is extremely allergic to ear molds is: Never a candidate for BAHS A candidate for BAHS as long the average bone conduction is more than 65 dB HL A candidate for BAHS as long the average bone conduction is less than 65 dB HL Always a BAHS candidate

4.  To be a candidate for the Ponto, as an SSD patient the audiogram must show: The bone conduction average in both ears is at least 20 dB HL The patient has at least a profound sensorineural hearing loss in the worse ear The patient has normal or near normal hearing in their better ear Both B and C

5.  What are the advantages of treating a conductive hearing loss with a BAHS device over a hearing aid? Improved battery life Less gain needed (no compensation for air bone gap) which leads to better sound quality Need more gain so sounds are louder and clearer Both A and B

6.  A patient will obtain bilateral benefit when fitted with BAHS on both ears if: Both ears have a roughly similar air bone gap Air conduction thresholds are symmetrical Bone conduction thresholds are approximately symmetrical Both A and C

7.  Increasing the MFO of a BAHS device, leads to a more natural sound due to: Better utilization of patients dynamic range as more sounds are reproduced naturally Soft sounds being louder Both A and B A decreased saturation level

8.  The advantages of treating SSD with a BAHS device instead of a hearing aid are: Better localization of sound Ear canal is open Only have to wear one device Both B and C

9.  Which of the following statements are true: Direct Drive solutions lead to a 10-20 dB sound attenuation in mid-high frequencies BAHS devices which transmit sound via an implanted abutment are a Direct Drive solution Both B and D Skin Drive solutions lead to a 10-20 dB sound attenuation in mid-high frequencies

10.  The advantages of a bilateral BAHS fitting are: Less gain needs to be prescribed due to binaural summation Improved localization Better able to hear speech in noise All of the above