DOI: http://dx.doi.org/10.18203/issn.2454-5929.ijohns20175054

Morphometric analysis of human cricoid cartilage: a cadaveric study

Viswanathan Anand, Harikesh Sharma, Ashwani Sethi, Satyanjaya Sahoo

Abstract


Background: Cricoid cartilage is the only complete ring that surrounds the airway completely. Although it is smaller than thyroid cartilage and does not house any important structures like the thyroid cartilage (vocal folds), it forms an important cog in the upper airway. Renewed interest in subglottic stenosis recently has underscored the importance of detailed knowledge of cricoid cartilage. This study aims to augment the meagre information available on this important part of upper airway.

Methods: Study design was on morphometric analysis and the setting was at tertiary health care centre. Thirty one adult human cadaveric larynges were obtained for this study. Using an electronic vernier caliper, different morphometric parameters of all the cricoid cartilages were noted down in a predesigned proforma in standard computer office software. The data thus obtained was collated and compared with existing literature.  

Results: The average inner transverse diameter (F: 15.05±1.02 mm; M: 17.52±2.64 mm) is greater than the average inner antero-posterior diameter (F: 12.71±0.45 mm; M: 14.11±2.55 mm). The average height of cricoid arch was F: 6.50±0.68 mm; M: 7.69±0.63 mm and the average height of cricoid lamina was F: 18.38±0.61 mm; M: 21.17±2.31 mm.

Conclusions: Inter specimen disparity was noted in the various dimensions measured in the cricoid cartilages. The average transverse diameter was greater than the average antero-posterior diameter giving the cartilage an ovoid shape in nearly all specimens. Morphometrical data of the cricoid cartilage may be very useful in endotracheal intubation, laryngeal microsurgery and laryngeal framework surgery. These parameters can be helpful in evaluation of subglottic stenosis and its surgical repair.

 


Keywords


Cricoid cartilage, Larynx, Morphometry

Full Text:

PDF

References


Skandalakis J. Skandalakis surgical anatomy: The embryologic and anatomic basis of modern surgery. 1st edn. Volume 1. Greece: Pashalidis Medical Publications Ltd; 2004: 234-262.

Standring S. The larynx. In: Gray’s Anatomy, The anatomical basis of clinical practice. 40th edn. Philadelphia, London: Churchill Livingstone; 2008: 577-580.

Eckel HE, Sittel C, Zorowka P, Jerke A. Dimensions of the laryngeal framework in adults. Surgical Radiologic Anatomy. 1994;16:31-6.

Jain M, Dhall U. Morphometry of the Thyroid and Cricoid cartilages in Adults. J Anatomical Soc India. 2008;57(2):119-23.

Ajmani ML. A metrical study of the laryngeal skeleton in adult Nigerians. J Anatomy. 1990;171:187-91.

Ajmani ML, Jain SP, Saxena SK. A metrical study of laryngeal cartilages and their ossification. Anatomischer Anzeiger. 1980;148(1):42-8.

Romanes GJ, Editor. Cunningham’s manual of practical anatomy. 15th edn. London: Oxford Med Publication; 2002: 157-166.

Singla RK, Kaur R, Laxmi V. Morphology and morphometry of adult human cricoid cartilage: a cadaveric study in north indian population. Int J Anatomy Res. 2015;3(1):910-4.

Zielinski R. Morphometrical study on senile larynx. Folia Morphologica, 2001;60(2):73-8.

Sprinzl G. Morphometric measurements of the cartilaginous larynx: An anatomic correlate of laryngeal surgery. Head Neck Surg. 1999;21:743-50.

Maue W, Dickson D. Cartilages and ligaments of the adult human larynx. Arch Otolaryngol. 1971;94:432-9.

Joshi M, Joshi S, Joshi S. Morphometric study of cricoid cartilages in Western India. Australasian Med J. 2011;4(10):542-7.

Chievitz JH. Uter Suchungen Uberdie Verknocherung. Arch fur Anatomie Physiologie; 1882: 303-349.

Harjeet, Jit I, Sahani D. Dimensions and weight of the cricoid cartilage in northwest Indians. Indian J Med Res. 2002;116:207-16.