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Magnetic resonance imaging of guinea pig cochlea after vasopressin-induced or surgically induced endolymphatic hydrops.

Publication ,  Journal Article
Marshall, AF; Jewells, VL; Kranz, P; Lee, YZ; Lin, W; Zdanski, CJ
Published in: Otolaryngol Head Neck Surg
February 2010

OBJECTIVE: To investigate the ability to detect the in vivo cochlear changes associated with vasopressin-induced and surgically induced endolymphatic hydrops using MRI at 3 tesla (T). STUDY DESIGN: Prospective, animal model. SETTING: Animal laboratory. SUBJECTS AND METHODS: In group 1, five guinea pigs underwent post-gadolinium temporal bone MRI before and after seven and 14 days of chronic systemic administration of vasopressin by osmotic pump. In group 2, five guinea pigs underwent temporal bone MRI eight weeks after unilateral surgical ablation of the endolymphatic sac. Three-tesla high-resolution T1-weighted sequences were acquired pre- and postcontrast administration. Region of interest signal intensities of the perilymph and endolymph were analyzed manually. Quantitative evaluation of hydrops was measured histologically. RESULTS: Gadolinium preferentially concentrated in the perilymph, allowing for distinction of cochlear compartments on 3.0-T MRI. The T1-weighted contrast MRI of vasopressin-induced hydropic cochlea showed significant increases in signal intensity of the endolymph and perilymph. Surgically induced unilateral hydropic cochlea also showed increased signal intensity, compared with the control cochlea of the same animal, but less of an increase than the vasopressin group. The histological degree of hydrops induced in the vasopressin group was comparable to previous studies. CONCLUSIONS: In vivo postcontrast MRI of the inner ear demonstrated cochlear changes associated with chronic systemic administration of vasopressin and surgical ablation of the endolymphatic sac. Understanding the MRI appearance of endolymphatic hydrops induced by various methods contributes to the future use of MRI as a possible tool in the diagnosis and treatment of Ménière's disease.

Duke Scholars

Published In

Otolaryngol Head Neck Surg

DOI

EISSN

1097-6817

Publication Date

February 2010

Volume

142

Issue

2

Start / End Page

260 / 265

Location

England

Related Subject Headings

  • Vasopressins
  • Vasoconstrictor Agents
  • Prospective Studies
  • Otorhinolaryngology
  • Meniere Disease
  • Magnetic Resonance Imaging
  • Guinea Pigs
  • Gadolinium
  • Endolymphatic Sac
  • Endolymphatic Hydrops
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Marshall, A. F., Jewells, V. L., Kranz, P., Lee, Y. Z., Lin, W., & Zdanski, C. J. (2010). Magnetic resonance imaging of guinea pig cochlea after vasopressin-induced or surgically induced endolymphatic hydrops. Otolaryngol Head Neck Surg, 142(2), 260–265. https://doi.org/10.1016/j.otohns.2009.10.006
Marshall, Allen F., Valerie L. Jewells, Peter Kranz, Yeuh Z. Lee, Weili Lin, and Carlton J. Zdanski. “Magnetic resonance imaging of guinea pig cochlea after vasopressin-induced or surgically induced endolymphatic hydrops.Otolaryngol Head Neck Surg 142, no. 2 (February 2010): 260–65. https://doi.org/10.1016/j.otohns.2009.10.006.
Marshall AF, Jewells VL, Kranz P, Lee YZ, Lin W, Zdanski CJ. Magnetic resonance imaging of guinea pig cochlea after vasopressin-induced or surgically induced endolymphatic hydrops. Otolaryngol Head Neck Surg. 2010 Feb;142(2):260–5.
Marshall, Allen F., et al. “Magnetic resonance imaging of guinea pig cochlea after vasopressin-induced or surgically induced endolymphatic hydrops.Otolaryngol Head Neck Surg, vol. 142, no. 2, Feb. 2010, pp. 260–65. Pubmed, doi:10.1016/j.otohns.2009.10.006.
Marshall AF, Jewells VL, Kranz P, Lee YZ, Lin W, Zdanski CJ. Magnetic resonance imaging of guinea pig cochlea after vasopressin-induced or surgically induced endolymphatic hydrops. Otolaryngol Head Neck Surg. 2010 Feb;142(2):260–265.
Journal cover image

Published In

Otolaryngol Head Neck Surg

DOI

EISSN

1097-6817

Publication Date

February 2010

Volume

142

Issue

2

Start / End Page

260 / 265

Location

England

Related Subject Headings

  • Vasopressins
  • Vasoconstrictor Agents
  • Prospective Studies
  • Otorhinolaryngology
  • Meniere Disease
  • Magnetic Resonance Imaging
  • Guinea Pigs
  • Gadolinium
  • Endolymphatic Sac
  • Endolymphatic Hydrops