Distance between Anterior Commissure and the First Tracheal Ring: An Important New Clinical Laryngotracheal Measurement

Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_IJOTO-27-3_003

تاریخ نمایه سازی: 11 بهمن 1400

Abstract:

Introduction: The distance between the anterior commissure of the larynx and the first tracheal ring (AC.T. distance) is of great importance in laryngotracheal surgeries.  The amount of narrowing of the subglottic airway is used as a quantitative mean to determine whether the lesion is subglottic or has extended to the trachea and therefore helps in the prediction of the final prognosis.   Materials and Methods: In this study, the larynx was exposed by direct laryngoscopy under general anesthesia. The case was considered to be difficult because the exposure did not optimally reveal the anterior commissure, therefore a cricoid tape or anterior commissure laryngoscope was used. A zero degree Hopkins lens was used to view the anterior commissure and the first tracheal ring. Special markers were used to mark the two points with the distance between those being considered as the AC.T. distance. The relationship between AC.T. distance and the patient's age, sex, BMI, and laryngeal exposure condition during laryngoscopy was also studied.   Results: Eighty-two patients participated in this study. The mean AC.T. distance was measured and was found to be ۳۲.۶۷±۳.۳۴ mm in males and ۲۹.۸۰± ۳.۰۰ mm in females. This difference was statistically significant between the two groups (P<۰.۰۵). There was no statistically significant relationship between BMI, age, laryngeal exposure condition, and the AC.T. distance.    Conclusion:  The AC.T. distance was measured to be around ۳ cm; with males measuring greater than females. However, future studies may lead to a more accurate practical scale for laryngotracheal surgeries due to possible technical or human errors, in addition to racial differences.

Authors

Ehsan Khadivi

Sinus and Surgical Endoscopic Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Mohammad Ali Zarringhalam

Department of Otorhinolaryngology-Head & Neck Surgery, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Kamran Khazaeni

Department of Otorhinolaryngology-Head & Neck Surgery, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Mehdi Bakhshaee

Sinus and Surgical Endoscopic Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

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