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Application of the potassium‐titanyl‐phosphate laser during extraocular muscle surgery: Technique and histopathology
Author(s) -
Hertle Richard W.,
Mollet Linda,
Prayer William C.
Publication year - 1994
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.1900150111
Subject(s) - potassium titanyl phosphate , histopathology , extraocular muscles , medicine , anatomy , surgery , ophthalmology , laser , pathology , optics , physics
We determined laser parameters and delivery system requirements for successful use of the potassium‐titanyl‐phosphate (KTP) laser for strabismus surgery and its histopathologic effect on extraocular muscle, tendon, sclera, and cornea of human and rabbit eyes. Enucleated cadaver eyes and exenterated rabbit orbital contents were used. Using a 200‐μm fiberoptic tip delivery system, varying laser energies were used to perform muscle insertion site and corneal damage, tenotomies, and myotomies. Pulse durations of 0.5 second and energies above 0.8 watt were needed for tenotomy or myotomy. No damage to the surrounding tissues or sclera was observed with laser tenotomy or myotomy performed 0.5 mm from the insertion site. Energy above 0.8 watt applied directly caused full thickness disruption. In comparison to scissor myotomy, the laser provided charring of the superficial tissues. This study shows that the KTP laser can be safely and accurately used for extraocular muscle tenotomy or myotomy. © 1994 Wiley‐Liss, Inc.