Your doctor has requested a Lacrimal Duct scan. The information below will answer some of the questions you may have.
A lacrimal duct scan is a simple and painless way of taking pictures of your nasolacrimal drainage system, using a small amount of radioactive tracer. It helps to assess if there is any functional or mechanical obstruction of the lacrimal duct.
When you arrive in the department, a technologist will explain the entire procedure to you and then give you the opportunity to ask any questions. If you wear eyeglasses or contact lenses, you will be asked to remove them. The technologist will then administer a small drop of radioactive tracer in each of your eyes. There are no known side effects from these radiotracer drops. After the eye drops are administered, you will be asked to sit in front of a special detector, called a gamma camera. The technologist will then take a series of images of your eye. The entire procedure will take about 1 hour.
- Bring your Health card.
- No special preparation is required. You will be able to eat, drink and take your medications as usual on the day of your scan.
- If you have had a CT scan with contrast to evaluate your eyes, then we will need to wait for 2 weeks before booking this test.
- Please leave all valuables at home.
- Please notify our booking office at the time of scheduling your appointment if you have any concerns regarding claustrophobia, sitting still, have a language barrier or any other special needs, so that appropriate arrangements can be made ahead to provide you with the best possible care.
This test is completely painless.
The eye drops contain a small amount of radioactive tracer which emits gamma rays (these are similar to X-rays). The radiation dose is very low and will disappear by itself after two days. The results of your scan will give your doctor useful information about your condition and will help them plan your treatment. The benefits of having the scan far outweigh any potential risk from the small radiation dose.
No special precautions are needed after the scan. If you are travelling across any borders in the seven days after your scan, please ask us for further advice. Border crossings and airports have very sensitive radiation detectors which may pick up tiny amounts of radioactivity remaining after your scan. We will give you a letter that you can show to customs officials at border crossings or airports.
Please tell us if you are pregnant or breastfeeding.
Breastfeeding must be interrupted for up to 12 hours after the exam, during which time milk should be pumped and discarded. Prepare for your exam accordingly.
A specially trained doctor will examine the pictures. This is normally done soon after the end of the scan. A report is then sent to the doctor who asked us to do the scan. Your doctor will normally receive the report within one week. You will also have access to the report on MyChart as soon as it is released.
If you have questions about the scan results or report, please contact your doctor directly. They are best able to interpret the report for you.
No. This test is paid for by the healthcare system. The test costs several hundred dollars, so please notify the department at 613-761-4831 if you cannot make your appointment.
If you cannot make your appointment, it is important that you notify the department at 613-761-4831 as soon as possible. Failure to make your appointment results in wasting of expensive materials that are ordered especially for your appointment and also reduces availability to other patients. Missed appointments may also result in delays of your treatments.