1 / 18

MDCT Assessment of The Cochlear-Carotid Interval

H . Pı nar Gu nbey, M . D . ¹ Huseyin Aydın, M.D.² Huseyin Cetin, M.D¹ ¹ A taturk E ducation and R esearch H ospital, A nkara, ² Gulkent H ospital , Isparta T urkey. MDCT Assessment of The Cochlear-Carotid Interval . B ackground.

saman
Download Presentation

MDCT Assessment of The Cochlear-Carotid Interval

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. H.Pınar Gunbey, M.D. ¹ Huseyin Aydın, M.D.² Huseyin Cetin, M.D¹ ¹Ataturk Education and Research Hospital, Ankara,² Gulkent Hospital, IspartaTurkey MDCT Assessment of The Cochlear-Carotid Interval

  2. Background • The cochlea and the carotid canal are among a number of crucial anatomic structures that extremely close one to another in the petrous pyramid of temporal bone • Anatomic knowledge of these vital structures and relations between them provides an important key to approach this complex region

  3. This close anatomic course represents possible surgical risk during petrosectomy apporach to the clivus brainstem or the middle fossa apporach to the internal acustic meatus or most recentlly increasingly popular thecohlear implant surgery. • Especially internal carotid artery (ICA) lesion  transoperative bleeding risk  difficult to control  serius results associated with the irrigation of the central nervous system

  4. Incochlearimplantsurgery the risk of potentialinjurytothecarotidartery may be seenduringdrilling of thebasalturn of thecochleaandimproperplacement of theelectrode • The instance between the cochlea and the carotid artery may be also a possible reson for auditory and vestibular symptoms such as tinnitus and hearing loss.

  5. Purpose • investigate the normal range of the this region called ‘‘ cohlear- carotid interval’’ (CCI) in a wide population by 64-slice multi-detector computed tomography (MDCT).

  6. Materials and Method • A retrospective study who had undergone a temporal MDCT between September 2008 and March 2010 • 1105 patients (510 M and 595 F) • 0,5 mm thickness coronal images by 64-slice MDCT • The bony interval for right and left sides confirming from axial and sagittal planes of multiplanar reformat images • Measured independently by 2 observers

  7. Mann Whitney U test and Sperman correlation test were used to assess differences between readers ,sides and gentles

  8. Results Carotid-cochlear interval measures

  9. CCI measured 0.0 mm • unilateraly in 8 patients (0.7%) (Young et al.2006) • bilateraly in 2 patients (0.1%) (Modugno et al.2004) • a score of 10 in total population (0.9%) • CCI scores of total population a range of 0,0 to 6 mm for the right side (mean 0,9 ± 0.8) and 0,0 to 5.9 mm for the left side (mean 1.0 ± 0.8;)

  10. CCI dehisence

  11. 3D reconstruction

  12. Bilateral dehisence

  13. No relation CCI measures and subject gender • Positive correlation Right and left side CCI mesures

  14. Conclusion • The cochlea- carotid interval represents a wide variation independently from gender and the distance can be in microns • The dehisence can be seen unilateraly and more less bilateraly in a large population. • It is a developmental defect like superior semisircular canal dehisence and may be related with defects on maturation stages.

  15. In preoperative CT imaging special attention to this close relationship may allow the radiologist : to play a crucial role in alerting the surgeon to prevent the penetration of the carotid canal during cochlear surgery and the cochlear injury during vasculary surgery. • Possible surgical risk may result in unexpected tragic damage

More Related