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Introduction: While in most countries warfarin is the preferred anti-vitamin K, fluindione, a molecule with a prolonged half-life remains largely prescribed in France. Some of its side effects, including immuno-allergic complications, remain poorly understood., Case Report: A 77-year-old woman presented with a febrile severe neutropenia of immunoallergic mechanism with a favourable outcome associated with fluindione, introduced 25 days earlier for the treatment of atrial fibrillation., Conclusion: This rare side effect is a reminder of the importance of biological monitoring in the first weeks following the introduction of fluindione and key diagnostic elements and therapeutic aspects of iatrogenic agranulocytosis., (Copyright © 2015 Société nationale française de médecine interne (SNFMI). Published by Elsevier SAS. All rights reserved.)

Purpose: More than one million patients received an oral anticoagulant treatment in France. This medication is the first aetiology of iatrogenic events. Recently, direct oral anticoagulant (DOA) provided efficacy and safety in the treatment of atrial fibrillation and venous thromboembolic events. Given the growing increase in the prescription of these molecules, with many advantages but also disadvantages, it seemed interesting to assess in routine hospital medical practice, the proportion of patients for which the initiation of AOD could be safe., Methods: This prospective, observational study was conducted in the department of internal medicine from October 2012 and September 2013. All inpatients receiving oral anticoagulant treatment have been included. Demographic data, indication of anticoagulant treatment, contraindications and interactions have been reported. From these information, we have established the percentage of patients who could benefit from DOA safely and securely., Results: Two hundred and ninety inpatients were included with a mean age of 76.3±15.2 years old. Atrial fibrillation and thromboembolic venous disease were the most prevalent indications of anticoagulant treatments (67.2% and 22.4% of cases respectively). Among all patients, 260 had an indication of DOA (89.7%), authorized by the French National health agency. Eighty percent had both indication and no contraindication for DOA. However, only 53.1% of patients neither had drug-drug interaction. Main contraindications were severe renal failure (clearance<30mL/min) in 10.7% of cases, and recent history of gastric ulcer in 15.3% of cases. The most frequent interactions with DOA were antiplatelet agent (14.5%) and amiodarone (11.6%). Almost two thirds of inpatients (65.1%) had at least one drug-drug interaction with VKA., Conclusion: These results, coming from "real life", provide that only 53.1% of inpatients under anticoagulants could receive DOA safely. Caution is warranted, and VKA still have a preponderant role among anticoagulant drugs., (Copyright © 2015 Société nationale française de médecine interne (SNFMI). Published by Elsevier SAS. All rights reserved.)

Introduction: Anticoagulation clinics and computerized management of chronic oral anticoagulation increase the time spent in the therapeutic range with both mortality and morbidity reduction. Usually, anticoagulation clinics are hospital-based medical care centers. We report the five-year results from a general medicine center (CSCTA) using a computer-assisted management., Methods: A prospective cohort observational study of 530 primary care patients that were receiving long term oral anticoagulation., Results: Cardiac arrhythmia (55%), heart valve disease and venous thrombo-embolic disease (30%) represented the most common indications of oral anticoagulation. Patients received fluindione, warfarin and acenocoumarol in 80%, 13% and 7%, respectively. The duration of treatment was at least one year in 54% of the cases, and was at least three years in 25% of the cases. The rate of patients that were in average within the therapeutic range (INR 2-3) was 72%, while 12% were under and 16% over the therapeutic range. Corresponding rates were 82, 17 and 1% respectively for all anticoagulation targets (INR 1.5-4.5). Twenty-six bleeding events (4.9 per 100 patient-years) and four thrombotic complications (0.75 per 100 patient-years) occurred. Life-threatening hemorrhage occurred in 1.3 per 100 patient-years. After the equilibration of the anticoagulation, the average delay of control between two consecutive INR was 19 days., Conclusion: The results obtained with CSCTA were similar to those reported by other anticoagulation clinics regarding hemorrhagic complications and time spent in the therapeutic range. In contrast, thrombotic events were less frequent. Because of the absence of a control group, a medico-economic analysis could not be performed.

Anti-thrombin, anti-platelet and anti-vitamin K agents are common treatments given for the prevention of thrombotic or embolic events. In oral or maxillofacial surgery, the question is whether oral anticoagulants or anti-platelets should be discontinued or not: temporary interruption could limit the risk of bleeding, but would increase the risk of thrombosis, and inversely. The best risk/benefit ratio must be achieved, but in many cases anti-platelet agents or even anti-vitamin K agents can be continued. In case of "potentially hemorrhagic" oral surgery, anti-platelet agents should be interrupted about ten days before the intervention. Anti-vitamin K agents should be interrupted four days before surgery and if required, replaced by low-molecular weight heparin at preventive or curative doses. In the very large majority of patients however, surgery (avulsion for example) can be performed without interrupting anticoagulation. Data in the literature have demonstrated that despite the theoretical risk of hemorrhage, bleeding is minimal and can be easily controlled by local treatments; the risk of thrombotic or thromboembolic events after discontinuing anticoagulation is much greater. A close collaboration between the dentist, the stomatologist, and the clinician is required to determine whether anti-thrombosis prevention should be continued and whether the anticoagulation level is adapted to the thrombotic risk. Good surgical technique and local anti-hemorrhagic treatment are essential in oral surgery, particularly in patients taking anti-platelets or oral anticoagulants.

Despite standardized tests (PT-INR) and better definition of therapeutic objectives, oral anticoagulation still leads to a significant number of hemorrhagic events. The risk is higher during the initial phase of treatment and for arterial indications, but must also be considered for other situations, including deep vein thrombosis, where the risk is less well defined. This risk can now be quantified on the basis of recent data used to identify at risk populations. The risk scores account for age, gender, associated cancer, weight, history of digestive tract bleeding or stroke, and comorbidity (recent myocardial infarction, hematocrit<30%, serum creatinine > 15 mg/l, diabetes). A high score is associated with higher risk of hemorrhagic events. Besides the patient's clinical status, the risk of hemorrhage is related to compliance, the level of anticoagulation, and drug interactions. Specialized monitoring centers provide a means of reducing the risk of morbidity and mortality. New anticoagulation agents must be developed to reduce the risk of hemorrhage which remains an important cause of morbidity and mortality, particularly in the elderly and patients at risk.

Objectives: To control whether prescriptions of curative doses of heparin (non fractioned heparins, enoxaparin, tinzaparin) in the hospital complied with the official recommendations; to provide the physicians with information adapted to the recorded misuse and to evaluate the influence of this information., Methods: A prospective study was conducted between May and October 1999 on the prescriptions of 20 residents from 6 services in 3 phases: phase P1 with initial evaluation (particularly on the indications for heparin, the molecule administered, initial dose and monitoring), phase P2 with analysis and diffusion of an adapted information and phase P3 with final evaluation., Results: 111 inpatients were included in the phase P1 (66.7% aged over 75 years, 18.9% with creatinin clearance below 30 ml/mn) and 101 inpatients were included in the phase P3 (56.4% aged over 75 years, 10.8% with renal failure). During phase P1: among the prescriptions of low molecular weight heparin (LMWH) 54.3% did not comply with the official recommendations; initial doses were too high in 15.3% of patients; mean initial doses of LMWH were not adapted to age, weight or creatinin clearance. Only 58.5% of patients had their platelets monitored. On the other hand, 15.3% of patients exhibited heparin side effects. During phase P3, the main modifications in prescriptions were a reduction in inappropriate indications for LMWH, reduction in LMWH prescriptions in patients aged over 75 or with excessive body weight or with renal failure, and increased platelet monitoring, but without significant difference. On the other hand, mean initial doses of each heparin were not modified. Heparin complications decreased but not significantly., Conclusion: This study highlights a real context of heparin prescription at curative doses, often differing from clinical studies, particularly with regards to age, renal failure and comorbidity; prescriptions often unadapted to official recommendations on indications, dose and monitoring; a real but limited influence of appropriate information for the physicians, which partially depends on the accuracy of official recommendations, particularly in patients with increased hemorrhagic risk.

Abstract: Introduction: Anticoagulation clinics and computerized management of chronic oral anticoagulation increase the time spent in the therapeutic range with both mortality and morbidity reduction. Usually, anticoagulation clinics are hospital-based medical care centers. We report the five-year results from a general medicine center (CSCTA) using a computer-assisted management. Methods: A prospective cohort observational study of 530 primary care patients that were receiving long term oral anticoagulation. Results: Cardiac arrhythmia (55%), heart valve disease and venous thrombo-embolic disease (30%) represented the most common indications of oral anticoagulation. Patients received fluindione, warfarine and acenocoumarol in 80%, 13% and 7%, respectively. The duration of treatment was at least one year in 54% of the cases, and was at least three years in 25% of the cases. The rate of patients that were in average within the therapeutic range (INR 2–3) was 72%, while 12% were under and 16% over the therapeutic range. Corresponding rates were 82, 17 and 1% respectively for all anticoagulation targets (INR 1.5–4.5). Twenty-six bleeding events (4.9 per 100 patient-years) and four thrombotic complications (0.75 per 100 patient-years) occurred. Life-threatening hemorrhage occurred in 1.3 per 100 patient-years. After the equilibration of the anticoagulation, the average delay of control between two consecutive INR was 19 days. Conclusion: The results obtained with CSCTA were similar to those reported by other anticoagulation clinics regarding hemorrhagic complications and time spent in the therapeutic range. In contrast, thrombotic events were less frequent. Because of the absence of a control group, a medico-economic analysis could not be performed. [Copyright &y& Elsevier]