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The 2.7mm telescope within a exam/protection sheath has an outer diameter of 3.5mm. This is suitable for tracheoscopy in snakes, lizards and chelonians over 4kg.
Blockage of the trachea in reptiles for the purposes of endoscopy is well tolerated by anaesthetized reptiles, and there is no need to provide alternative ventilation (c.f. air sac intubation in birds).
For smaller reptiles, smaller diameter telescopes (1.9mm) or semi-rigid endoscopes (1mm) are available. The unprotected 2.7mm telescope can also be used with extreme caution, making sure that the reptile's head and neck are fully extended and straight.
Always use a mouth gag to guard against a lightly anesthetized reptile from biting down on the scope.
Normal trachea in a Boa constrictor snake.
Severe granulomatous pneumonia in a Ball python due to Mycobacteria spp.
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