At UHN, we strive to deliver Compassionate Care & Caring. Learn more about the services and supports that are available to you throughout your journey.
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University Health Network has grown to be one of the largest research and teaching hospital networks in Canada - pioneers in improving the lives of patients. Our long history of health professions education at Toronto General, Toronto Western, Princess Margaret and Toronto Rehab hospitals has consistently advanced the science of education.
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Toronto, Ontario, Canada. The scope of research and complexity of cases at UHN has made us a national and international
source for discovery, education and patient care.
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The Non-Invasive Diagnostic Vascular Lab provides non-invasive diagnostic ultrasound tests on arteries and veins, which our doctors use to confirm a diagnosis and determine a course of treatment. These tests may also be used to track disease progression over time.
There are generally two kinds of arterial vascular disease: occlusive and aneurysmal. In the occlusive form, blood flow is reduced because of plaque that has formed in the arteries. This causes reduced blood flow to tissues beyond the blockage. In aneurysmal disease, the wall of an artery weakens, which allows it to become larger and rupture is a possibility.
We also consult and manage the venous disease, thoracic outlet syndrome and AV malformations.
The Non-Invasive Diagnostic Vascular Lab at Toronto General Hospital is an Intersocietal Accreditation Commission Vascular Testing (ICAVL) accredited laboratory. We provide excellent quality care using state-of-the-art equipment.
Our staff has extensive experience with advanced non-invasive vascular evaluation in patients with highly complex vascular diseases. We provide a clinical teaching environment to national and international vascular residents.
The Patient & Family Education Program at UHN offers valuable resources to help you understand your condition.
Watch these videos to find out how we're building a better endograft to improve the treatment for patients with abdominal aortic aneurysms. Each video shows a different treatment option.
More information on cardiac and heart health:
Visit our Health Information section to find dedicated resources to help you understand your condition.
Find the information you're looking for.
Someone will call you to give you a time for your appointment at the Non-Invasive Diagnostic Vascular Lab.
The first person you meet at the Non-Invasive Diagnostic Vascular Lab is the receptionist. To sign in with the receptionist you will need your health card (OHIP card). If you do not have an OHIP card, please bring another form of government-issued photo ID (such as a driver's license, passport, or other provincial health card).
First appointments take longer than follow-up appointments.
The average Non-Invasive Diagnostic Vascular Lab appointment can take 60 minutes per test required. If you are scheduled to be seen in the clinic after your Lab appointment you will proceed to
Vascular Clinic otherwise you will be informed that you may leave.
We do everything that we can to stay on time. Unfortunately, your appointment may be delayed by unforeseen circumstances. We recommend that you come prepared for delays.
At the end of your first appointment, the doctor will review your test. The results will be mailed to the referring physician. The referring physician will determine the next step in treatment and notify you appropriately.
If you are unsure about what your next steps are, don't be afraid to ask a member of your team. We are here to help you.
The Vascular Lab Secretary will call you the day before your scheduled visit to remind you of your appointment. If you have changed your phone number please ensure you notify us so we can update our records.
If you are unable to keep your scheduled appointment please contact the Non-Invasive Diagnostic Vascular Lab Secretary at 416 340 3589 as early as possible. If you do not have an answering machine for us to leave a message – you may need to call us.
Dr. Kenneth Wayne JohnstonPhone: 416 340 3552
Staff Physicians or Specialists
Dr. J. JaskolkaPhone: 416 340 2769
Dr. Thomas LindsayPhone: 416 340 4620
Vascular Technologists are medical professionals that collaborate with physicians to diagnose blood vessel problems in patients using colour doppler ultrasound.
You will be contacted with information about your first appointment.
Please bring the following to your appointment. Not all of these items may be needed for your appointment. Our clinic or your referring doctor will let you know what you must bring.
Please arrive 15 minutes before your appointment.
When you arrive, you will sign in with the receptionist. You will need your health card (OHIP card) to sign-in. If you do not have an OHIP card, please bring another form of government-issued photo ID, such as a driver’s license or passport.
You may be given a Measuring Health Equity Questionnaire to fill out. This form contains questions about your background. We collect this information to find out who we serve and what unique needs you may have. The form is voluntary and you can choose ‘prefer not to answer’ to any or all questions. However, the information you choose to give us will help us improve the quality of care for you and others.
First appointments take longer than follow-up appointments. Your first appointment can take 2 hours or more. Follow-up appointments usually take 15 to 30 minutes. We do everything we can to stay on time but sometimes unforeseen circumstances may delay your appointment.
At the end of your first appointment, the nurse or doctor will give you a contact list for your health care team. If you don’t get a contact list, feel free to ask for it.
After every appointment, a member of your health care team will tell you about your next visit. Be sure you understand what is going to happen next. For example, know the time and place of your next visit or if someone will call you with this information.
If you are unsure about what your next steps are, don’t be afraid to ask a member of your team. We are here to help you.
We understand that reaching us by phone can sometimes be difficult. Often our phone lines are busy or are turned over to the message centre so our staff can prepare for clinic visits or help other patients. We make every effort to return your call within 24 hours. Our staff will try to reach you 2 times. If we are not able to reach you directly you may need to call us again.