Tenotomy (Tendon Fenestration) Therapy

Tenotomy involves fenestration of the tendon, similar to acupuncture, which aims to help your body heal by stimulating tendon healing. A radiologist will use a small needle to gently poke the torn or inflamed tendon with the help of image-guided technology. This is used to treat chronic tendon inflammation, or small tendon tears. Tenotomy can be combined with platlet-rich plasma or prolotherapy injections to accelerate healing.


  • You must have an ultrasound of the area of concern prior to your injection.
  • Arrive 15 minutes prior to your appointment.
  • Wear comfortable clothing.
  • If you are on anticoagulation drugs (Plavix, Coumadin, Warfarin etc.) you may need to have an international normalized ratio (INR) test and stop your medication prior to the procedure. Please inform our booking coordinator so that they can discuss this in more detail prior to your appointment.


  • We may provide you with a comfortable clinic gown to change into (depending on the area being treated).
  • A technologist will explain the consent form, procedure details, and answer any questions.
  • We will then escort you to our treatment suite where you will be greeted by the radiologist who will clean the skin and inject a local anesthetic, similar to the freezing you get at the dentist.
  • Ultrasound will be used to target the area and perform the tenotomy.
  • Once completed you will be assessed post-injection and if there are no concerns, you will be free to leave.


  • Avoid any strenuous activity for five days post-injection. A gradual return to activity is advised depending on the underlying problem. Tenotomy is gentle, but may temporarily weaken the tendon and put it at risk of rupturing, so your return to activity is best guided by a physiotherapist.
  • If possible, please avoid anti-inflammatory medication for two weeks (such as ibuprofen – Advil). It may interfere with the effectiveness of your injection.
  • We will schedule a follow-up ultrasound at six months to evaluate how the tendon is healing.
  • Pain may increase for a few days post-injection as the body mounts an inflammatory response, but this should subside.


Results vary from weeks to months depending on the joint or body part involved, severity of the disease, and the cause of your pain. Some patients get complete relief that is permanent, while others have no significant effect. If an injection does not help relieve your pain, then you may need further evaluation.


This exam is covered under your Alberta Health Care Plan. It is not currently offered at our Saskatchewan clinic.

To help limit the spread of COVID-19, Mayfair has temporarily closed a number of clinics and limited service offerings. Learn more

For Your Appointment

Please ensure that you bring your requisition with to your appointment.



15-20 minutes


How long does the procedure take to work?

There may be mild tenderness or bruising at the site of your injection. As the tendon begins to heal, your pain should gradually decrease, but may take a few weeks to notice a difference. Take Tylenol or anti-inflammatories if pain persists.

How long will the treatment last?

The goal of the injection is to permanently strengthen the tendon.

How many procedures can I have and how often?

We will arrange a follow-up ultrasound to re-assess the tendon after three months to ensure the tendon is healing and your symptoms are improving.

What are the side effects?

A common side effect of an injection is mild pain or bruising around the area. Over-the-counter pain medication or icing the area can help. Very rare side effects may include infection or further tearing of the tendon.