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Three types of muscle weakening surgeries?
Three types of muscle strengthening surgeries?
What is recession surgery?
- weakening- slackening of muscle
- insertion of muscle is moved to point closer to its point of origin in same plane
What is myectomy surgery?
- reduces action of muscle by reducing number of contractile element
- making cuts into the muscle
What is tenotomy/tenectomy surgery?
- tenotomy- tendon is cut
- tenectomy- part of the tendon is excised
- SO muscle
- parsympathomimetic: miotic, increases accom
- use: ST with low AC/A
- side effects: iris cysts, transient myopia, HA
What is resection surgery?
- shortens muscle length by excising part of muscle
- excessive can limit movement of globe in opp direction
- portion of muscle is folded- decreasing length
insertion of muscle is move closer to the limbus away from point of origin in the same plane
- moving insertion of muscle to change its primary/2ndy action
- A or V syndromes
What are some surgical complications?
- loss of muscle
- perforation of globe
- scleral wound
What are some anaesthesia complications?
- cardiac arrest
Post op complications?
- minor conj redness
- chronic inflamm of conj
- excessive scar tissue
- granuloma on muscle
- corneal dellen
- suture reactions
- consecutive strab
- blocks release of ACh
- sx: inject into ipsi ant to weaken and lengthen muscle to prevent contracture
- ST: MR
- XT: LR