Complications of ventilation tubes: - Dr. Nassem Talaat
Complications of ventilation tubes: - Dr. Nassem Talaat
Complications of ventilation tubes: - Dr. Nassem Talaat
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Blood Supply<br />
a- Arterial<br />
b- Venous: pharyngeal & pterygoid plexus ……… common facial ……IJV<br />
Nerve supply<br />
a- Motor: Cranial accessory (11), via vagus (10).<br />
b- Sensory glosso pharyngeal n. (9).<br />
Lymphatic drainage: retropharyngeal & lateral pharyngeal then UDCLN<br />
Waldayer’s ring :<br />
Def : ring <strong>of</strong> subepithelial lymphoid tissue that surrounds the pharynx<br />
Consists <strong>of</strong> :<br />
- Nasopharyngeal tonsil. -Tubal tonsils around orifice <strong>of</strong> E.T.<br />
- Palatine tonsils (the largest). -Lingual tonsils.<br />
- Discrete lymphoid nodules on lateral & posterior pharyngeal walls<br />
Characterized by :<br />
- lymphoid tissue lie in direct contact e mucosa<br />
- No afferent<br />
- <strong>Dr</strong>ain to retropharyngeal & UDCLN<br />
* Anatomy <strong>of</strong> the palatine tonsils<br />
- Two ovoid masses <strong>of</strong> lymphoid tissue lying in tonsillar fossa on each side <strong>of</strong><br />
oropharynx<br />
- Tonsillar fossa lies between ant. pillar , post. pillar & postero lat. third <strong>of</strong> the<br />
tongue<br />
- Tonsil has two surfaces :<br />
. Lat. surface covered by tonsillar capsule, which separates it from sup.<br />
constrictor muscle ( bed )<br />
. Med. Surface is free & covered by st. sq. epithelium that invaginates to form 12-<br />
15 crypts, largest is called crypta magna which is present near upper pole
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