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Embryological Development

Question
3 out of 71
 

True about larynx in neonate: (AIIMS Nov 2009)



A Epiglottis is large and omega shaped

B Cricoid narrowest part

C It extends C4,5,6 vertebrae

D Tongue is small in comparison to oral cavity

E Funnel shaped

Ans. A B and E. Epiglottis is large and omega shaped; Cricoid narrowest part; and Funnel shaped

Ref. Miller Anaesthesia 5th/ed p 201J0; Tuti 1 st/ed p 284; Scott-Brown's 7th/ed Vol 2 p 2131; Mohan Bansal p 67; Dhingra 6th/ed p 285

Infant's Larynx Differs from Adult in:

1. It is situated high up (C2 - C4)Q (in adults == C3 - C6)

2. Of equal size in both sixes (in adults it is larger in males)

3. Larynx is funnel shaped

4. The narrowest part of the infantile larynx is the junction of subglottic larynx with trachea and this is because cricoid cartilage is very small

5. Cartilages:

a. Epiglottis is omega shaped, soft, large and patulous,

b. Laryngeal cartilages are soft and collapse easily

c. Thyroid cartilage is flat

d. Arytenoid cartilage is relatively large

6. 6, The cricothyroid and thyrohyoid spaces are narrow

7. The submucosal tissue is thick and loose and becomes oedematous in response inflammation

8. Vocal cords are angled and lie at level of C8

9. Trachea bifurcates at level ofT9

Note

Narrowest part of adult larynx is Rima Glottidis.

Embryological Development Flashcard List

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