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Langenbeck's Archives of Surgery

, Volume 403, Issue 8, pp 1015–1020 | Cite as

Transcutaneous laryngeal ultrasonography (TLUS) as an alternative to direct flexible laryngoscopy (DFL) in the perioperative evaluation of the vocal cord mobility in thyroid surgery

  • Polina Knyazeva
  • Viktor Makarin
  • Barbara Seeliger
  • Roman Chernikov
  • Ilya Sleptsov
  • Arseny Semenov
  • Martin K. Walz
  • Pier F. Alesina
ORIGINAL ARTICLE
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Abstract

Purpose

Direct flexible laryngoscopy (DFL) is the golden standard to evaluate the vocal cord (VC) function in thyroid and parathyroid surgery pre- and postoperatively. Transcutaneous laryngeal ultrasonography (TLUS) could represent an alternative to the DFL and has been evaluated in the present study comparing the results of both methods performed at two referral centers for endocrine pathologies.

Methods

In the setting of a retrospective study, 668 patients (560 female, 118 male; mean age 50.3 ± 14.2) were included from two tertiary referral centers of endocrine surgery. In all patients, TLUS was performed pre- and postoperatively prior to transnasal DFL, which served as a golden standard. TLUS was performed by B-scan (probe 5–13 MHz, aperture 40 mm).

Results

Preoperative visualization of the vocal cords by TLUS was possible in 526 patients (78.7%). Due to the frequent thyroid cartilage calcification (TCC) in male patients, a significant difference in the visualization rate was found between female and male (88.7% vs. 26.8%) [p < 0.0001]. Additionally, the visualization rate was inversely related to the patient’s age [p < 0.001]. The sensitivity of preoperative TLUS was found to be 66.7%, the specificity 100%. DFL confirmed a postoperative palsy in 34 out of 40 patients with supposed abnormal vocal cord mobility at TLUS and demonstrated a palsy in four more cases with supposed regular mobility at TLUS. Therefore, the sensitivity of postoperative TLUS was 86%, the specificity of 99.1%, positive predictive value 89.4%, negative predictive value 98.7%.

Conclusions

TLUS could represent an alternative for the evaluation of vocal cords mobility. This method has the potential to replace the DFL in the majority of cases, especially in female patients. Nevertheless, DFL is still necessary in about 20% of the patients with failed visualization at TLUS.

Keywords

Laryngoscopy Laryngeal ultrasonography Vocal cord Thyroidectomy Evaluation Complications 

Notes

Compliance with ethical standards

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Polina Knyazeva
    • 1
  • Viktor Makarin
    • 2
  • Barbara Seeliger
    • 1
  • Roman Chernikov
    • 2
  • Ilya Sleptsov
    • 2
  • Arseny Semenov
    • 2
  • Martin K. Walz
    • 1
  • Pier F. Alesina
    • 1
  1. 1.Klinik für Chirurgie und Zentrum für Minimal Invasive Chirurgie, Kliniken Essen-MitteAkademisches Lehrkrankenhaus der Universität Duisburg-EssenEssenGermany
  2. 2.North-Western Centre of Endocrine SurgerySt. PetersburgRussia

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