A few differences exist for oro-velar opening,
vallecula and piriform sinus filling, and pharyngeal constriction.
The tongue was classified as Grade 1 when the
vallecula was partially visible in an examination using a 70[degrees] rigid endoscope, while the tongue was in an easy position within the mouth; it was classified as Grade 2 when the
vallecula was invisible and the tongue base touched the epiglottis; and when the tongue base pushed the epiglottis, it was classified as Grade 3.
In these cases the tracheal tube tip impacted in the
vallecula.
Causes of obstructive sleep apnoea in younger age Structure Neonates & infants Nasal Aplasia, Stenosis, Atresia, Masses Tonsils Tongue Macroglosia, Vascular malformations of the tongue and pharynx, Congenital cysts of the
vallecula of tongue.
It should be noted that in the over-60s, the swallow may only become reflexive as the bolus reaches the
vallecula (between the back of the tongue and epiglottis).
If the airway is too long it can pass into the larynx or into the
vallecula (a blind-ended pouch at the root of the tongue (Stoneham 1993), or it can cause airway obstruction if it is pressed against soft tissues.
(1) Tumour spread often occurs posteriorly and inferiorly into the
vallecula, the epiglottis and hence to the supraglottis and pre-epiglottic space (1) (Fig.
Traditionally, the main morphological differences for identifying these 11 local-used Chaihu are the characters observed from their original plants: the width of involucel bracts, the shape of leaves, the number of umbellules and the vitta number at the
vallecula and commissure of fruits; and the characters from the major morphological features of their dried roots: the shape and texture of roots, straight or detached, the color of root and cut surface, with/without fiber-like petiole residues, rich in xylem fiber or not.
The pseudomembrane covered the supraglottic structures, including the epiglottis,
vallecula and piriform sinus, the postericoid region, and glottic inlet.