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34 Cards in this Set
- Front
- Back
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what is the effective correction of a 1 mm recession in diopters and degrees?
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1 mm = 2 degrees correction = 4 PD correction
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what is the effective correction of a 1 mm resection in diopters and degrees?
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1 mm = 1 degree = 2 PD correction
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when would a SO tenotomy be useful? What is the common post-operative complication?
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- Brown Syndrome
- SO o/a - IO Palsy isolaTED - post op can mimic SO palsy |
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What is the Hurada-Ito procedure?
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SO is moved anteriorly to correct 10-15 degrees of excyclotorsion
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What is MALE used for?
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transposition of muscles with A or V patterns - medial toward apex, lateral toward ends
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What is a Z-myotomy?
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more lengthening out of a muscle (muscle is weakened by increasing the length); used when a maximally recessed muscle needs further weakening
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What is a Jensen procedure?
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works on any of the rectus muscles; 30 PD change in primary position, 20 degree rotation into field of action; use non-absorbable sutures
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What is a Knapp procedure?
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movement of 2 muscles to the insertion of the weak muscle. Result is a 38 PD correction in pp, and 25 degrees of rotation in the feild of the weak muscle. Indications: monocular elevation deficiency
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Which of the following would Knapp procedure be useful?
- IO underaction - CPEO - monocular elevation deficiency - IR overaction |
monocular elevation deficiency
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What is a Faden operation?
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use of posterior fixation sutures - reduced the effect of the muscle in its field of action without any effect in pp or the opposite gaze. Suture is placed posterior to equator of the globe
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How to surgically manage NBS?
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BMRc
Faden operation |
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how to sx manage high AC/A
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R&R with more emphasis on MRs
or BMRc |
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how to sx manage CN VI palsy
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jensen procedure
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basic OR SIMULATED exo - sx management
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R&R
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true divergence excess exo - sx managemtn
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BLRc
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Sx for accommodative eso?
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+/- BMRc with Faden operation if high AC/A
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Sx for nystagmus?
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Kestenbaum procedure (also jknown as anderson?)
shift to null point |
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When may anterior segment ischemia occur?
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tenotomy of multiple recti muscles
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Wht are the 4 strengthening procedures
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- tuck
- resection - advancement - transposition |
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when are traction sutures used?
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prevention of post-op adhesions
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when are adjustable sutures used? absorbable or non? how to determine if tweaking is needed?
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thyroid
absorbable cover test to determine |
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What is a tenotomy?
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tendon is cut, nothing removed
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What is a tenectomy?
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tendon is cut and section is removed
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What is myotomy?
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muscle is cut, nothing removed
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Wat is myectomy?
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muscle is cut and a portion removed
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What is muscel disinsertion ? What are indications?
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release tendon from insertion and no reattachment
indicated in large deviations, DVD, etc? |
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When to use Botox?
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- incomitant dev while waiting for Sx
- trial before sx - prevent contracture - blepharospasm |
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What is silicone expander used for?
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Brown syndrome - piece of Si used to lengthen tendon?
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What is extirpation?
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Cut as much of the muscle as possible back to Tenon's (weaken)
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What is denervtion?
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cauterization of the nerve itself
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How does Botulinium Toxin work?
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inhibits neuromuscular transmission
prevents release of ACh at NM junction |
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What is a resection?
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myectomy is performed and then muscle is re-inserted at original site
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What is advancement?
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Change insertion site forward
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What is a muscle tuck?
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folding of the muscle, same insertion
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