Subconjunctival THC:YAG laser thermal sclerostomy.
Ophthalmology
; 98(9): 1394-9; discussion 1399-400, 1991 Sep.
Article
en En
| MEDLINE
| ID: mdl-1945315
ABSTRACT
A THCYAG laser (thulium, holmium, chromium-doped YAG crystal) was used to create thermal sclerostomies in 21 glaucomatous eyes of 19 patients. The laser is a long-pulsed (300 microsec), compact, self-contained, solid state laser operating in the near infrared (2.1 mu). A 1-mm conjunctival stab incision was made 12 mm away from the sclerostomy site to allow entry of a specially designed 22-gauge (712 mu) optic probe that delivers energy at a right angle to the long axis of the fiber. Probe insertion produced minimal disturbance of the conjunctiva. Pulse energies of 80 mJ to 120 mJ were used with a repetition rate of 5 pulses/second. Total energy levels to produce full-thickness sclerostomies ranged from 1.4 to 4.8 J. Subconjunctival 5-fluorouracil injections were administered in 15 eyes. At 3 months the mean intraocular pressure of successful cases (16) was 14 mmHg (range, 9 to 22 mmHg). Of successful cases, the mean intraocular pressure at 6 months was 13 mmHg (range, 2 to 22 mmHg). Five cases failed within the initial 3 months, and 3 additional cases failed by 6 months. The authors conclude that this full-thickness sclerostomy technique may simplify filtering surgery without anterior chamber instrumentation and with minimal conjunctival trauma.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Esclerostomía
/
Glaucoma
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Conjuntiva
/
Terapia por Láser
Tipo de estudio:
Observational_studies
/
Prognostic_studies
Límite:
Adult
/
Aged
/
Aged80
/
Child
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Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Ophthalmology
Año:
1991
Tipo del documento:
Article