Abstract:
OBJECTIVE:To study early direct effects of transpupillary thermotherapy (TTT) on choroidal neovascularization (CNV) and choroid. DESIGN:Retrospective, noncomparative interventional case series. PARTICIPANTS:Sixty-four eyes with subfoveal CNV. INTERVENTION:TTT was delivered using a diode laser at 810 nm through a contact lens. Exposure time was 60 seconds with a power/diameter ratio of 247 mW/mm. The end point was an invisible treatment with no color change at the retina level. MAIN OUTCOME MEASURES:Fluorescein and indocyanine green angiographic findings within 1 hour, and at 1, 2, and 4 weeks after TTT. RESULTS:Fluorescein angiography (FA) and indocyanine green angiography (ICGA) performed within 1 hour after TTT showed increased leakage of CNV and choroidal vessels. Follow-up at 1 and 2 weeks demonstrated a hypofluorescent area corresponding to the laser spot and absence of angiographic leakage seen on FA and ICGA. At 4 weeks after TTT, FA showed mottled hypofluorescence-hyperfluorescence of the TTT-treated area and absence of angiographic leakage. CONCLUSIONS:TTT induces a characteristic dynamic sequence of vascular changes. Treatment with TTT can lead to absence of angiographic (FA and ICGA) leakage for 4 weeks. Determination of the long-term efficacy and visual implications awaits the results of clinical trials.
journal_name
Ophthalmologyjournal_title
Ophthalmologyauthors
Lanzetta P,Michieletto P,Pirracchio A,Bandello Fdoi
10.1016/s0161-6420(02)01034-5subject
Has Abstractpub_date
2002-06-01 00:00:00pages
1098-104issue
6eissn
0161-6420issn
1549-4713pii
S0161-6420(02)01034-5journal_volume
109pub_type
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