Fluorescein and ICG Angiography are used to image the posterior layers of the eye. Generally it allows the physician an better understanding of the disease process. This imaging procedure is conducted using a small amount of liquid dye that is injecting into a vein, similar to a blood draw with a butterfly needle.

What is indocyanine green angiography used for?

ICG is used to acquire an angiogram of the choroid. The choroid is the layer of blood vessels and connective tissue between the sclera (white of the eye) and retina. It supplies nutrients to the inner parts of the eye.

What is fluorescein angiography for the eyes?

Fluorescein angiography is an eye test that uses a special dye and camera to look at blood flow in the retina and choroid. These are the two layers in the back of the eye.

What is FA and ICG?

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A. FA is performed by injecting fluorescein into a vein and taking a series of photographs of the retina and choroid as the dye flows through the blood vessels in the eye. ICG is a fluorescent dye that binds to the proteins in plasma, enabling spectral imaging of the optical vascular system.

How do you administer indocyanine green?

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Indocyanine green is administered as a rapid IV bolus. For hepatic function studies, administer into the lumen of an arm vein as rapidly as possible, without allowing the dye to escape outside the vein. Study the patient in a fasting, basal state.

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How does fluorescein angiography work?

Fluorescein dye is injected into a vein in the arm/hand. As dye passes through the blood vessels of your eye, photographs are taken to record the blood flow in your retina. The photographs can reveal abnormal blood vessels or damage to the lining underneath the retina. The images will be captured in black and white.

Is ICG a dye?

Assessment of hepatic function Indocyanine green (ICG) clearance is the quantitative measure of hepatic function most used worldwide. ICG is a water-soluble tricarbocyanine dye that binds to albumin and distributes rapidly and uniformly in the blood after intravenous injection.

What are the three types of Ophthalmic imaging?

In the past two decades eye care has seen the emergence of three major technologies for diagnostic imaging of the posterior segment of the eye: Scanning Laser Polarimetry (SLP), Confocal Scanning Laser Ophthalmoscopy (CSLO), and Optical Coherence Tomography (OCT).

What is the purpose of the fluorescein angiography?

Fluorescein Angiography (FA) is a diagnostic procedure that uses a special camera to record the blood flow in the RETINA – the light sensitive tissue at the back of the eye. The test does not involve any direct contact with the eyes.

How do you give indocyanine green?

What is FFA in eye test?

This test involves injecting dye into the bloodstream and taking a picture of it as it runs through the eyes. It allows careful study of the retinal circulation. In most imaging techniques, the dye appears white against a darker background.

How do you dilute indocyanine green?

For ophthalmic angiograms, dilute up to 40 mg indocyanine green with 2 mL of Sterile Water for Injection (up to 20 mg/mL). For lymphatic mapping, dilute 25 mg indocyanine green with 20 mL of Sterile Water for Injection (1.25 mg/mL). Discard the solution if the product precipitates.

What is indocyanine green angiography (ICG)?

Indocyanine Green Angiography. The choroid is the layer of blood vessels and connective tissue between the sclera (white of the eye) and retina. It supplies nutrients to the inner parts of the eye. A procedure similar to fluorescein angiography, but ICG angiography uses Indocyanine Green dye, which fluoresces in the infra-red (non-visible) light.

Can the test be done with both indocyanine green and sodium fluorescein?

Sodium fluorescein is the dye used to study retinal circulation, while indocyanine green is used for choroidal circulation. Can the test be done with both dyes? What is it used for? The two tests can be carried out simultaneously. First one dye is injected and then the other.

What is the difference between fluorescein and ICG?

A procedure similar to fluorescein angiography, but ICG angiography uses Indocyanine Green dye, which fluoresces in the infra-red (non-visible) light. The infra-red wavelenths have the ability to penetrate the retinal layers making the circulation in deeper layers visible when photographed with an infra-red sensitive camera.

What is ICG angiography used for?

It supplies nutrients to the inner parts of the eye. A procedure similar to fluorescein angiography, but ICG angiography uses Indocyanine Green dye, which fluoresces in the infra-red (non-visible) light.