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Paper Information

Journal:   JOURNAL OF KERMANSHAH UNIVERSITY OF MEDICAL SCIENCES (BEHBOOD)   Winter 2002 , Volume 5 , Number 3; Page(s) 16 To 21.
 
Paper: 

THYROID GLAND'S MORPHOLOGY AND APPLIED SURGERY (TEHRAN 1994-1995)

 
 
Author(s):  MEHRANNIA T.*, MEHRANNIA K., MOHAMMADI Y.
 
* Anatomy Department, School of Medicine, Kermanshah UMSHS, Kermanshah
 
Abstract: 

History & Objective: Considering the relation of recurrent laryngeal - nerve with the inferior thyroidal artery and their impacts on thyroid gland surgery, the present study was designed to study both the structural and anatomical changes of the thyroid gland in 100 cadavers in Tehran's Legal Medicine Center from 1994 to 1995.
Materials & Methods: The data of this descriptive study included information about: weight- length, width, and isthmus of thyroid gland. Further information about thickness of capsule, the condition of the inferior laryngeal nerve with respect to nearby structures and the condition of the superior laryngeal nerve was collected.
Results: Analysis of the data showed 26 of the cases was females and 74 were males, between 20 and 65. The average weight of thyroid gland was 21.9±4.49 gm. The average length and width of each lobe were 5.26±0.46 and 2.60±0.46 respectively. The average length of isthmus was 1.04±0.18cm. In 7% of the cases, the recurrent laryngeal nerve passed through branches of the inferior thyroidal artery (4% on the left & 3% on the right). In 42%, the nerve was on the right and in 27% on the left, passing in front of inferior thyroidal artery. Recurrent laryngeal nerve in 59% of the cadavers was on the left and in 55% of them was on the right, passing through Berry ligament.
Discussion: This study indicated that the dissection of the recurrent laryngeal nerve in the surgery of thyroid gland protects this nerve from damaging. Since recurrent laryngeal nerve innervate all muscles except the Cricothyroid gland muscle, any damage to this nerve will stop the larynx from functioning and impaires the activity of the vocal cards on the affected side. Findings the exact location and path of the recurrent laryngeal nerve can minimize the damage to it.

 
Keyword(s): THYROID GLAND, MORPHOLOGY, RECURRENT LARYNGEAL NERVE, THYROIDAL ARTERY, APPLIED SURGERY
 
References: 
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