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Study of the Feasible Size of a Bone Conduction Implant Transducer in the Temporal Bone

Författare och institution:
Sabine Reinfeldt (Institutionen för signaler och system, Medicinska signaler och system, Chalmers); Per Östli (Institutionen för signaler och system, Medicinska signaler och system, Chalmers); Bo Håkansson (Institutionen för signaler och system, Medicinska signaler och system, Chalmers); Hamidreza Taghavi (Institutionen för signaler och system, Medicinska signaler och system, Chalmers); Måns Eeg-Olofsson (Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för öron-, näs- och halssjukdomar); Joacim Stalfors (Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för öron-, näs- och halssjukdomar)
Publicerad i:
Otology and Neurotology, 36 ( 4 ) s. 631-637
ISSN:
1531-7129
E-ISSN:
1537-4505
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2015
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Hypothesis: The aim was to assess the temporal bone volume to determine the suitable size and position of a bone conduction implant (BCI) transducer. Background: A BCI transducer needs to be sufficiently small to fit in the mastoid portion of the temporal bone for a majority of patients. The anatomical geometry limits both the dimension of an implanted transducer and its positions in the temporal bone to provide a safe and simple surgery. Methods: Computed tomography (CT) scans of temporal bones from 22 subjects were virtually reconstructed. With an algorithm in MATLAB, the maximum transducer diameter as function of the maximum transducer depth in the temporal bone, and the most suitable position were calculated in all subjects. Results: An implanted transducer diameter of 16 mm inserted at a depth of 4 mm statistically fitted 95% of the subjects. If changing the transducer diameter to 12 mm, a depth of 6 mm would fit in 95% of the subjects. The most suitable position was found to be around 20 mm behind the ear canal. Conclusion: The present BCI transducer casing, used in ongoing clinical trials, was designed from the results in this study, demonstrating that the present BCI transducer casing (largest diameter [diagonal]: 15.5 mm, height: 6.4 mm) will statistically fit more than 95% of the subjects. Hence, the present BCI transducer is concluded to be sufficiently small to fit most normal-sized temporal bones and should be placed approximately 20 mm behind the ear canal.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
MEDICIN OCH HÄLSOVETENSKAP ->
Klinisk medicin ->
Oto-rino-laryngologi
Nyckelord:
Bone conduction, implant, Computed tomography, Maximum size, Temporal bone, Transducer
Postens nummer:
213128
Posten skapad:
2015-02-25 15:25
Posten ändrad:
2016-06-28 13:58

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