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IJAR.2018.309

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Type of Article:  Original Research

Volume 6; Issue 3.3 (Septmber 2018)

Page No.: 5678-5681

DOI: https://dx.doi.org/10.16965/ijar.2018.309

VARIATIONS IN THE ORIGIN OF SUPERIOR LARYNGEAL ARTERY: A CADAVERIC STUDY

M.Gayathri 1,  C.Subadha *2.

1,*2 Assistant Professor, Department of Anatomy, Govt. Dharmapuri Medical College, Dharmapuri , Tamilnadu, India.

Address for Correspondence: Dr.C.Subadha, Assistant Professor, Department of Anatomy, Govt.Dharmapuri Medical College, Dharmapuri – 636701, Tamilnadu, India. Phone : 9443982393  E-Mail: subadha99@gmail.com

ABSTRACT:

Background: The superior laryngeal artery (SLA) is the dominant arterial supply of the laryngeal muscles, mucosa and glands. Knowledge of variations in the origin of superior laryngeal artery will be very useful during reconstructive surgeries of the larynx, partial laryngectomy, laryngeal transplantation, and also during procedures like super-selective intra-arterial chemotherapy for laryngeal and hypolaryngeal cancers. However, relatively few studies have been done on the superior laryngeal artery in comparison to its clinical importance. The present study was aimed at documenting the prevalence of variable origin of the superior laryngeal artery within the carotid triangle.

Materials and methods:  Seventy hemi-necks obtained from 35 cadavers were dissected and studied for variations in the origin of superior laryngeal artery. Dissection method was employed for this study. The infrahyoid group of muscles were identified and reflected. The sternocleidomastoid muscle and superior belly of omohyoid were displaced laterally. The fascia was removed from the lobes of the thyroid gland exposing its arteries and veins, studied the origin of STA and its branches, especially superior laryngeal artery.

Results: It was observed that the superior laryngeal artery took origin from superior thyroid in 92.8% cases. Variable origin from the bifurcation of common carotid artery was noted in 4.28% cases. SLA was found to arise from the external carotid artery in 2.85% cases. All the variations that were observed were unilateral.

Conclusion: These findings may provide further insight to the anatomists, radiologists and surgeons and can help improve performances during surgical manipulations of the larynx.

Key words: Superior laryngeal artery, Superior thyroid artery,Common carotid artery, laryngectomy, External carotid artery.

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Cite this article: M.Gayathri, C.Subadha. VARIATIONS IN THE ORIGIN OF SUPERIOR LARYNGEAL ARTERY: A CADAVERIC STUDY. Int J Anat Res 2018;6(3.3):5678-5681. DOI: 10.16965/ijar.2018.309