Comparison Of Doppler Indices of Superior Thyroid Artery Between Normal and Pathological Thyroid

Mythreesha; Mohd Abdul Umran Khan

Mythreesha Assistant Professor, Department of Radio-Diagnosis, Vydehi institute of medical science and research institute. Whitefield. Bangalore, India.
Mohd Abdul Umran Khan Assistant Professor, Department of Pediatrics, Dr VRK Women�s Medical College Aziznagar, Moinabad, Telangana, India

Keywords: Thyroid ultrasonography, superior thyroid artery Doppler, Graves� disease, thyroiditis

Abstract

Background: Thyroid ultrasonography is the initial imaging modality for thyroid anatomy assessment whereas the hormonal profile helps with the functional status of the gland. Doppler parameters along with conventional B-mode ultrasonography will help identify and distinguish various thyroid pathologies. There are more evidences on doppler parameters of inferior thyroid artery and very rare on superior thyroid artery. Aims and objectives: To study the normal ranges of Doppler indices (PSV, PI, RI) of superior thyroid artery in normal population and to compare the Doppler indices (PSV, PI, RI) of superior thyroid artery in normal population and those with pathological thyroid (either abnormal TFT or abnormal thyroid ultrasonography or both). Methodology: This prospective observational comparative study was conducted by including the patients of all ages and either gender. Those with abnormal thyroid profile or sonography been considered as pathological group and without any observed changes as control group. They were subjected for superior thyroid artery doppler. All the obtained parameters were compared between these two groups. Results: 31 patients in each group were included. There was no significant difference in age of the participants in both group but cases group had female predominance. Of all the thyroid pathology, 32.3% (10/31) with thyroiditis was the commonest followed by Graves disease among 25.8%. We observed significant higher TSH in cases group. PSV and RI were significantly increased doppler parameter among pathological thyroid group than controls. Whereas between the Graves disease and thyroiditis, mean PSV on either lobe as well as overall was significantly higher in Graves disease than for the thyroiditis cases. Conclusion: We interpret that PSV cannot be alone used to differentiate between normal and pathological thyroid status. However, it can be vital in differentiation Graves disease from thyroiditis.

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