Anticoagulation Therapy: A Point-of-Care Guide (Point-of-Care Guides Book 2)

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In one retrospective series, data from consecutive patients who.. Oral anticoagulant therapy, antithrombotic therapy and prevention of thrombosis. In: American College of Chest Physicians evidence-based clinical practice guidelines, ninth ed. Pointof-care POCT prothrombin time monitors: is a periodical control of their. The recent emergence of portable coagulometers point of care assessment on POC testing of oral anticoagulation therapy aims.. TABLE 1. Several computer programs have been developed to guide warfarin dosing.

They are based on various 33rd Report. Technical Report Series No. Technical Report Series ; Annex 3: pp. These guidelines focus on the optimal management of anticoagulant drugs for the.. These guidelines may not include all appropriate methods of care for the clinical. Recently, to meet the need for comprehensive point-of-care PoC testing, in blood viscoelasticity during coagulation from a time series of laser speckle Fuster V.

International Normalized Range Monitoring for Anticoagulated Patients at Home

At this time, evidence also accumulated that the systematic, coordinated care with its strong support of point-of-care prothrombin time monitoring and the concept guidelines for coordinated outpatient oral anticoagulation therapy management. Publishes a monthly newsletter; Produces a monthly webinar series where. Paracetamol based medications are safe to use with warfarin. Non-steroidal anti-inflammatory medications e. Nurofen should not be used as their anti-platelet activity introduces an additive risk of bleeding in the patient taking warfarin.

Coagulation

Unless expressly advised to do so by a medical doctor, patient taking warfarin should not take aspirin. Patients requiring warfarin therapy are advised to have a healthy, varied diet. Consistency is recommended across the course of a week, but is not necessary day-to-day. For most families, a change in diet causing alteration to the INR is usually related to the child not eating due to intercurrent illness, school holidays snacking eating practices versus portions eaten when at school or overseas travel and associate changes in the kinds of food eaten.

Patients requiring a fat-free diet e. This reflects Vitamin K being a fat-soluble vitamin. Monitoring of the INR within 3 days of commencing a fat-free diet is recommended. As previously stated, infant formulas and enteral feed solutions can impact response to warfarin as they are Vitamin K fortified. Any change to the volume of feeds administered or the interval of feeding e. It is recommended that an INR test be performed 3 days post such changes. In addition, ensure there is always at least 1 hours between the administration of any vitamin K containing formula and the administration of warfarin.

Minor respiratory illnesses are unlikely to impact upon response to warfarin, provided the child continues to eat normally and does not require antibiotics. Any viral illness lasting more than 3 days should be reported to the Clinical Haematology team, to consider whether an alteration to the current management plan is required.

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Gastroenteritis, and diarrhoea in particular, can cause a significant change in response to warfarin, causing the INR to increase rapidly. Diarrhoea can cause the INR to increase rapidly within 24 hours. Families are advised to call Haematology to inform them that their child has diarrhoea if symptoms persist for more than 24 hours.

An INR should be performed within the next 24 hours and warfarin dose reduction is likely necessary. If families report such deterioration to Clinical haematology, it is wise to arrange for an INR to be performed in order to rule out a change in their management plan being necessary. The major adverse event associated with warfarin is bleeding.

Point of care learning

In an audit of bleeding events at RCH, our major bleeding rate was found to be 0. Families with a child commencing warfarin are educated regarding the use of routine first aid measures for any injury their child sustains. Should the bleeding experienced by a child on warfarin not be controlled using first aid measures, families are advised to go to Emergency for medical assessment.

For patients taking warfarin primary thromboprophylaxis having never had a blood clot , warfarin is usually withheld until the cause of bleeding is resolved. For patients at high risk of thrombosis in the setting of sub-therapeutic anticoagulation, Haematology Consultant review is required to prioritise the need for ongoing anticoagulation during an episode of bleeding. Warfarin is a vitamin K antagonist. Patients are not advised to commence vitamin or mineral supplementation at the time of commencing warfarin. It is recommended patients have the recommended three serves of dairy foods per day and participate in weight-bearing exercise as tolerated.

Patients requiring warfarin for more than 12 months should have a bone mineral density scan performed. If this scan result is within acceptable age-related parameters, repeat BMD testing should be performed every second year for as long as warfarin continues. Referral to Endocrinology may be necessary for patients with BMD results more than 2 standard deviations below age-related norms. In the setting of an elevated INR in a child who is not unwell and has no bleeding or bruising, withholding warfarin will allow the INR to slowly drift into the target range.

Vitamin K reverses the effects of warfarin. The dose to be administered and the indications for concurrent FFP or prothrombin concentrate are clinically driven and should be directed by the Clinical Haematology consultant. In the presence of a high INR results without bleeding, vitamin K can be administered sublingually, subcutaneously or intravenously at a dose range of 0.


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Daily INR monitoring is recommended. Antithrombotic therapy in neonates and children: Antithrombotic therapy and prevention of thrombosis, 9th ed: American College of Chest Physicians Evidence-based clinical practice guidelines. Developmental haemostasis: Impact for clinical haemostasis laboratories. Thrombosis and Haemostasis. An update of consensus guidelines for warfarin reversal.

Medical Journal of Australia. Recommendations for the development of a dedicated paediatric anticoagulation service. Journal of Thrombosis and Haemostasis. In press. Jones S. Thrombosis Research. Journal of Paediatrics and Child Health. Jones S, Newall F. Recommendations for point-of-care home International Normalised Ratio testing in children on vitamin K antagonist therapy.

After analysis, the handling of test results can further create transcription and interpretation errors []. Overall, as with any laboratory test, considerations for the cost effectiveness and patient benefit impact the utility of POCT [31]. A recent survey of U. Since POCT provides faster results, there is the potential for more rapid institution of therapy and beneficial patient outcomes.

Although POCT is faster, the technical performance may not be equivalent to traditional laboratory tests conducted in a central laboratory. Point-of-care testing, thus, presents the opportunity for improved care, but whether beneficial outcomes are realized depends on the balance of quality and clinical need. The convenience of POCT too often results in poor quality and over-utilization that raise the cost of care.

Stringent monitoring is required not only of POCT quality but also of utilization and clinical outcomes.