Darrin:
That article was written 20 plus years ago. At that time, a "late" ICG was
defined as absence of dye
in the visible retinal vasculature. The disk and vessels were black (against a
lighter choroid). This
usually meant going out 20 - 30 minutes. Not my idea or impression, but
popularized in the literature.
This was maximum information for several pathologies. At the time, I was
involved in a later published
article on the "other" eye on CSC patients. Their hot spots were defined very
late.
The protocol for ICG seems to follow the presumed diagnosis rather than a
cookie cutter timeline, just
like fluorescein angiography. I would not take most patients out to thirty
minutes these days. Usually the
retina doc does a lookie lou at 10-12 minutes and calls the end or extend.
the old Kirby Miller
-----Original Message-----
From: Darrin Landry <darrin@xxxxxxxxxxxxxxxx>
To: optimal <optimal@xxxxxxxxxxxxx>
Sent: Thu, Nov 17, 2016 11:22 am
Subject: [optimal] ICG
On a different note,
The OPS website still has the old Kirby Miller article about ICG angiography.
Back when he wrote this (I don't know the year), as he states, we take ICG
images out to at least 30 minutes, sometimes up to an hour.
Now, I haven't taken an ICG past 25 minutes since the mid 1990s. We now know
that ICG is a different animal than FA, and we don't wait to see what leaks.
Instead, it's a great marker to identify findings early in the process- such as
feeder vessels, RAP, and in the later (3-5 minutes) phases, PCV.
Having said that, how many people take ICG out more than 5 minutes? 10 minutes?
more?
Just curious- perhaps the article needs to be updated? (I would be more than
happy to oblige)
thanks
Darrin
Darrin A Landry, CRA, OCT-C
Ophthalmic Consultant
Bryson Taylor, Inc.
207-838-0961
www.brysontaylor.com
