Constrictions of esophagus
From Incisor tooth(as on endoscopy)
- Cricopharyngeal constricion-15cm(Narrowest part of GIT other than Appendix)
- Constriction at crossing of aortic arch-25cm
- Left main bronchus-28cm
- Diaphragmatic hiatus-40cm
Sites of narrowing of ureter
- Uretero pelvic Junction
- Crossing of iliac artery
- Juxtaposition of vasdeferens/broad ligament
- Uretero vesical junction
- Ureteric Orifice
Esophagus has 4 areas of constriction whereas ureter has 5.
Cricopharyngeal sphincter=Ureteropelvic jn
Crossing of arch of aorta=Crossing of iliac artery
Left main bronchus=vasdeferens/broad ligament
Diaphragmatic hiatus=Ureterovesical jn.
Cricopharyngeal sphincter is the commonest site of foreign body
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