MODERN SURGERIES FOR 3RD NERVE PALSY LIONEL KOWAL AUSTRALIA.

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Presentation transcript:

MODERN SURGERIES FOR 3RD NERVE PALSY LIONEL KOWAL AUSTRALIA

3rd N palsy If MR completely ‘dead’ & If LR still attached to the globe [no matter how many times it has been weakened] recurrent XT is inevitable unless globe is tethered

TETHERING THE GLOBE Superior oblique to MR insertion Creates new verticals Bind MR insertion to anterior lacrimal crest [fascia lata, periosteal flap, ….] LR can’t stretch this tissue

If MR ‘dead’, make LR totally ineffective Will get centrally positioned globe with poor horizontal movement NO possibility of XT recurrence

How to make the LR totally ineffective Remove from globe & suture to periosteum Scott, SKI, San Francisco Transpose LR to medial side of globe Taylor, Melbourne. ISA,1988 Remove muscle Tonsil snare [Sinskey] If muscle has already had multiple recessions: Anteriorly: Large anterior myectomy + miochol Via lateral orbitotomy

Lateral rectus muscle disinsertion and reattachment to the lateral orbital wall Morad Y,Kowal L, Scott AB Assaf Harofeh Medical Center, Israel Royal Victorian Eye and Ear Hospital, Australia Smith-Kettlewell Institute, CA, USA British Journal of Ophthalmology 2005;89:

LR  PERIOSTEUM Hook the LR and suture as for recession Tenotomise. Expose the periosteal edge: a few vertical snips through Tenon’s then spread with scissors. Feeling for the edge makes it easier.

LR  PERIOSTEUM Suture under direct vision or by feel. 2 bites of your favorite non- absorbable suture 6/0 Mersilene S 29 [LK] 6/0 Prolene C1 needle [AS] Dacron [YM] Novafil [AR] Close the Tenon’s defect with gut to isolate muscle from globe

LR  PERIOSTEUM Resect dead MR Leave slightly ET < 10^

RE-EXPLORE One re-exploration [to take down sup obl transposition] : lateral aspect of globe ‘clean’ No sign of any muscle

4 yo Fell from 3rd floor onto sidewalk [Morad]

Rectus Muscle Orbital Wall Fixation: A Reversible Profound Weakening Procedure Velez FG, Thacker N, Britt MT, Alcorn D, Foster RS, Rosenbaum AL J AAPOS 2004;8: … on the lateral rectus muscle in six subjects inc 3 cases of 3rd N palsy Results: 4 of 6 patients aligned within 12∆ No overcorrections.

Excise LR via lateral orbitotomy.. after multiple recessions and failed periosteal suture

PERIOSTEAL MUSCLE SUTURE HIGHLY RECOMMENDED FOR TOTAL 3rds UNUSUAL TECHNIQUE THAT YOU WILL QUICKLY FIND COMFORTABLE THANK YOU TO ALAN SCOTT