GGC Medicines - Referral of Patients to Anticoagulant Clinic (2024)

    N.B. If a patient has been on warfarin pre-admission, see guideline on Appropriate and Safe Conversion from Warfarin to a DOAC.

    Introduction

    Patients being discharged from hospital on vitamin K antagonists (warfarin or acenocoumarol) will usually be in an unstable phase of anticoagulation. It is therefore essential that the transition of anticoagulant monitoring from hospital care to the community or outpatient clinic is well organised and clearly documented for the patient and clinical staff involved.

    Anticoagulant service providers

    All NHSGGC adult patients taking, or to be commenced on, a vitamin K antagonist (VKA) must be referred to Glasgow and Clyde Anticoagulation Service (GCAS, see Appendix 6 for contact details)before discharge from hospital for their ongoing dosing and monitoring. GPs should not be asked to undertake routine INR monitoring. A referral should be made for all vitamin K antagonist-treated patients regardless of whether their anticoagulation is considered stable or not.

    For patients resident outwith NHSGGC, please contact the patient's GP to identify the most appropriate anticoagulant provider for their Health Board. Information may also be available from GCAS (see Appendix 6 contact details).

    Referral to GCAS

    Referrals should be made electronically via TrakCare for all VKA patients, whether they are started on treatment prior to or during hospital admission, or if they are still to commence on it as an outpatient.

    • Ensure that the request form contains as much information as possible to facilitate ongoing dosing and monitoring which includes:
      • Indication for warfarin / acenocoumarol, target INR and intended duration of treatment
      • Details of the last 3-5 most recent INRs, warfarin doses and dates (if available)
      • Details of anything that may affect anticoagulant control e.g. interacting medications
      • If the patient is on low molecular weight heparin bridging therapy
      • If the patient is on antiplatelet medication, which one and if this has to continue with VKA or not.
      • Referring consultant, ward and contact details. Failure to provide these details may result in delay in executing the referral within the 1 hour window.

    GCAS aim to process referrals within 1 hour of referral during the working week (Mon–Fri 9am-4pm). Weekend / out-of-hours referrals will be processed on the next working day. GCAS staff will phone the ward with an appointment for the patient, but if the patient has already been discharged then GCAS staff will require telephone contact details for the patient in order to appoint them.

    Prior to discharge

    Key recommendations are as follows:

    • Appointment – ensure referral is made via TrakCare to ensure prompt follow up is arranged for all patients discharged on a VKA (this will usually be scheduled for 3-7 days following discharge).
    • Home visits / transport - if the patient is housebound or is unable to attend a clinic appointment due to lack of transport (or friends / relatives providing transport), a home visit can be arranged. Contact GCAS office (see Appendix 6 for contact details) for NHSGGC patients or their GP if resident outwith NHSGGC.
    • Issue patient with a yellow anticoagulant booklet. Ensure the booklet includes:
      • Patient's details
      • 3-5 most recent INR results (where available) and associated VKA doses (including dose at discharge) to allow safe dosing at their first post-discharge anticoagulant clinic visit
      • Details of the next anticoagulant appointment if available at time of discharge, otherwise GCAS staff will contact the ward and patient directly. Therefore ensure patient contact details are provided on the referral form.
    • Patient education – ensure patient understands indication, interacting factors, bleeding risks and doses of VKA to be taken until first anticoagulant appointment.
    • Ensure patients are discharged with a sufficient supply of VKA.

    Patients already on Vitamin K antagonist prior to this admission

    • These patients can often be discharged in a less stable anticoagulant state and sometimes on a different dose. They may be on new medicines which could interact with VKA.
    • They will already have an existing anticoagulant clinic appointment but you must make a new referral to GCAS using the TrakCare form to obtain an updated appointment and ensure that their appointment is within 3-7 days of discharge.
    • Update the yellow booklet with appointment details and include 3-5 of the most recent INR results and corresponding VKA doses from their inpatient stay.

    Patients to be commenced on warfarin as an outpatient

    • Patients requiring elective initiation of warfarin (e.g. asymptomatic atrial fibrillation) can be referred to their local hospital anticoagulant clinic for this to be commenced as an outpatient. Use the electronic referral form on TrakCare (see details above) to make the referral.
    • On the referral form where it says 'when was the anticoagulation started', click on the spy glass and select option 'to be commenced at the anticoagulation clinic'. Include the same referral information as for inpatient referrals (see above).
    • It is recommended that such patients do not start anticoagulant therapy in advance of their first anticoagulant clinic appointment. GCAS will contact the patient directly with their anticoagulant clinic appointment and endeavour to appoint these patients within 2 weeks of referral.

    Guideline reviewed: July 2023

    Page last updated: December 2023

    GGC Medicines - Referral of Patients to Anticoagulant Clinic (2024)

    FAQs

    What happens at an anticoagulant appointment? ›

    During a typical visit, you can expect:

    An appointment lasting 10 to 15 minutes. A finger stick blood draw to get your international normalized ratio, or INR. Discussion with a pharmacist or nurse to receive your blood test result and dosing directions, and review any issues related to taking warfarin.

    What is an anticoagulant outpatient clinic? ›

    The Anticoagulant Clinic provides specialised care for patients taking anti-clotting medication to treat and prevent blood clots by offering a monitoring and advisory service.

    What are the benefits of anticoagulation clinic? ›

    Why is anticoagulation therapy important? At the Anticoagulation Clinic, we monitor your therapy closely to help prevent problems with your blood coagulation. Coumadin (warfarin) is an anticoagulation medication, or “blood thinner,” that prevents harmful clots from forming or moving.

    Where do I get an anticoagulant alert card? ›

    All patients should carry a yellow anticoagulant alert card or a manufacturer alert card. All patients should be offered one by the pharmacist or prescriber.

    How long should a patient be on anticoagulant therapy? ›

    For primary treatment of patients with DVT and/or PE, whether provoked by a transient risk factor or by a chronic risk factor or unprovoked, using a shorter course of anticoagulation for primary treatment (3-6 months) is suggested over a longer course of anticoagulation for primary treatment (6-12 months).

    What is the test for anticoagulant therapy? ›

    Prothrombin time (PT) is the primary laboratory test for monitoring oral anticoagulant treatment but is influenced by preanalytical conditions and analytical variables, that is, thromboplastin reagents and instrumentation.

    Why are patients usually prescribed an anticoagulant in hospital? ›

    They help prevent and treat clot-based health conditions like stroke and pulmonary embolism. These medications have life-saving potential.

    What patients are on anticoagulants? ›

    Treatment with anticoagulants may be recommended if your doctor feels you're at an increased risk of developing one of these problems. This may be because you've had blood clots in the past or you've been diagnosed with a condition such as atrial fibrillation that can cause blood clots to form.

    How is anticoagulant therapy done? ›

    An IV infusion is used for rapid therapeutic anticoagulation, beginning with a bolus loading dose of 0.4 mg/kg IV followed by a maintenance dose of 15 mg · kg1 · h1, with adjustments to maintain aPTT at 1.5 to 2.5 times the median of the normal laboratory range.

    Why would a person be prescribed anticoagulants? ›

    Anticoagulants are medicines that help prevent blood clots. They're given to people at a high risk of getting clots, to reduce their chances of developing serious conditions such as strokes and heart attacks. A blood clot is a seal created by the blood to stop bleeding from wounds.

    What conditions require anticoagulation therapy? ›

    Anticoagulants are used to treat blood clots in the veins (venous thrombosis), in the lungs (pulmonary embolism), and in people with atrial fibrillation (an irregularity in heart beat).

    What do anticoagulant drugs do in the body? ›

    Anticoagulants, such as heparin or warfarin (also called Coumadin), slow down your body's process of making clots. Antiplatelets, such as aspirin and clopidogrel, prevent blood cells called platelets from clumping together to form a clot.

    What is anticoagulant clinic for? ›

    The Anticoagulant Clinic provides specialised care for patients taking oral anticoagulant medication to treat and prevent blood clots by offering a monitoring and advisory service. Anticoagulants are medicines that help prevent blood clots.

    What anticoagulant is covered by Medicare? ›

    100% of Medicare prescription drug (Part D) plans cover Xarelto, a blood thinner that reduces blood clots.

    Which anticoagulant drugs are high alert? ›

    Anticoagulant therapies such as heparin and warfarin are considered high-alert medications, due to the high potential for patient harm if used improperly.

    What to expect when taking anticoagulant? ›

    A possible side effect of anticoagulants is excessive bleeding (haemorrhage), because these medicines increase the time it takes for blood clots to form.

    What is an anticoagulation visit? ›

    During your visit to the clinic you can expect the following: Each visit will take about 15 minutes. Staff will take a small blood sample from your finger which will be used to determine how long it takes for your blood to clot (your INR result).

    Are anticoagulant injections painful? ›

    Heparin is an anticoagulant medication that is usually injected subcutaneously. Subcutaneous administration of heparin may result in complications such as bruising, haematoma, and pain at the injection site. One of the factors that may affect pain, haematoma, and bruising is injection speed.

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