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Thyroid volume and Doppler evaluation of inferior thyroid artery in ultrasound: Comparison between current and previous users of oral contraceptives
Author(s) -
Garcia Tiago Severo,
Rech Tatiana Helena
Publication year - 2015
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.22221
Subject(s) - medicine , inferior thyroid artery , thyroid , ultrasound , doppler ultrasound , doppler effect , radiology , ultrasonography , cardiology , volume (thermodynamics) , recurrent laryngeal nerve , physics , quantum mechanics , astronomy
Background This study aimed to compare thyroid volume and Doppler sonographic evaluation of the inferior thyroid artery using ultrasound in current and previous users of oral contraceptives (OCs). Methods We evaluated 119 women who either currently use (n = 66) or have previously used OCs (n = 53) using color Doppler ultrasound for thyroid volume and resistance index, peak‐systolic, and end‐diastolic velocities of the inferior thyroid artery. Previous OC users were divided into two groups: previous OC use for <1 year and previous OC use for ≥1 year. Results A comparison of the thyroid volume revealed an increased volume in women with previous OC use for ≥1 year and in current users compared with those with previous OC use for <1 year (previous OC use for ≥1 year: 7.49 mL versus previous OC use for <1 year: 6.13 mL; p < 0.01). The relationship between OC use and an enlarged thyroid remained after adjusting for thyroid‐stimulating hormone levels ( p = 0.03). There were no differences in the inferior thyroid artery blood flow measurements. Conclusions In healthy women, current use and previous OC use for ≥1 year were associated with increased thyroid volume that was unrelated to increased blood flow in the gland. © 2014 Wiley Periodicals, Inc. J Clin Ultrasound 43:312–317, 2015