The Warfarin Clinic in the Mater Hospital is a service that provides helpful information, monitoring and warfarin dosing to a large number of patients who take anticoagulation medicine for a number of conditions.

We monitor patients on warfarin therapy for many different reasons, including: 

  • Atrial fibrillation
  • Mechanical valve replacements
  • Pulmonary embolism
  • Deep venous thrombosis
  • Congenital heart disease
  • Cerebral vascular accident
  • Antiphospholipid syndrome

We give patients their warfarin dose according to their individual target range, using the computer-assisted dosing (DAWN AC) system. Patient records are kept on our system and each patient also keeps their own record in their printed yellow record book.

Information for patients

At your first appointment at the clinic, we will talk to you about your warfarin therapy, answer any questions you may have and we'll also give you helpful information on your therapy that you can take away with you. We will also provide you with ongoing information throughout your therapy.

What we do at the clinic

Patients come to us for information and warfarin therapy monitoring. We also provide each patient with their individual warfarin doses, and we print the details of their dosage into their yellow record book. We have educated some patients to self-test their international normalised ratio (INR) using a CoaguChek XS machine. This is a blood test that checks how long it takes for blood to clot. The patients contact the clinic with the results from their self-test and we dose them accordingly.

Our clinic team

Consultant haematologist: Dr Fionnuala Ní Áinle
CNM2: Orla Wardick/Cathy Curran
Staff nurses: Vigi Thomas and Loreto Cayao
Clinic secretary: Ann Murphy
Phlebotomy staff provided by Siobhan Fitzpatrick (phlebotomy manager) 


All of our staff regularly attend anticoagulation conferences and are members of the special interest group CLOT (Clinical Leaders of Thrombosis). Cathy Curran has attended Birmingham University for anticoagulation training.
We have contributed to an information poster called “Know Your Vitamin K”, which has been distributed nationally.

Our consultants

Referral information

We only accept referrals from consultants within the hospital. We don’t accept direct GP referrals.

Your appointment

We will contact you with the date and time of your first appointment. Subsequent appointments will be printed into your yellow record book, along with your warfarin doses.

If you need to reschedule your appointment, please call the clinic on (01) 803 4452, (01) 803 4427 or (01) 803 4426.