scholarly journals Management of anticoagulated patients in dentoalveolar surgery: a retrospective study comparing Bridging with heparin versus unpaused vitamin K antagonist medication.

2021 ◽  
Author(s):  
Mayte Buchbender ◽  
F Rößler ◽  
Marco Kesting ◽  
Gesche Frohwitter ◽  
Werner Adler ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Prothrombin Time ◽  
Vitamin K ◽  
Tooth Extraction ◽  
Postoperative Bleeding ◽  
Vitamin K Antagonist ◽  
Control Group ◽  
Risk For Bleeding ◽  
Tooth Removal ◽  
Anticoagulated Patients

Abstract Background: The aim of this study was to investigate the occurrence of postoperative bleeding following dentoalveolar surgery in patients with either continued vitamin K antagonist medication or perioperative bridging using heparin. Methods: A retrospective study was performed analyzing patients who underwent tooth extraction between 2012 and 2017. Patients were retrospectively allocated into two comparative groups: un-paused vitamin K antagonist medication versus bridging using heparin. A healthy, non-anticoagulated cohort with equivalent surgery served as a control group. Main outcome measures were: the occurrence and frequency of postoperative bleeding, the number of removed teeth, the surgical technique of tooth removal (extraction/ osteotomy/ combined extraction and osteotomy) and the prothrombin time. Results: In total, 475 patients were included in the study with 170 patients in the group of un-paused vitamin K antagonist medication VG, 135 patients in the Bridging group BG and 170 patients in the control group CG. Postoperative bleeding was significant: CG vs.VG p=0.004; CG vs. BG p<0.001, BG vs.VG p<0.001. A significant correlation of number of the extracted teeth in the BG (p=0.014) and no significance in VG (p=0.298) and CG (p=0.210) and in the BG vs. VG and CG with p<0.001 in terms of surgical intervention extraction. No difference observed in terms of prothrombin time. Conclusion: Bridging with heparin increases the risk for bleeding compared to un-paused vitamin K antagonist medication. The perioperative management of anticoagulated patients requires a well- coordinated interdisciplinary teamwork to minimize or at best avoid both: postoperative bleeding and thromboembolic incidences. Key words:

scholarly journals Management of anticoagulated patients in dentoalveolar surgery: a retrospective study comparing bridging with heparin versus unpaused vitamin K antagonist medication

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Mayte Buchbender ◽  
Felix Rößler ◽  
Marco R. Kesting ◽  
Gesche Frohwitter ◽  
Werner Adler ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Prothrombin Time ◽  
Vitamin K ◽  
Tooth Extraction ◽  
Postoperative Bleeding ◽  
Vitamin K Antagonist ◽  
Control Group ◽  
Risk For Bleeding ◽  
Tooth Removal ◽  
Anticoagulated Patients

Abstract Background The aim of this study was to investigate the occurrence of postoperative bleeding following dentoalveolar surgery in patients with either continued vitamin K antagonist medication or perioperative bridging using heparin. Methods A retrospective study was performed analyzing patients who underwent tooth extraction between 2012 and 2017. Patients were retrospectively allocated into two comparative groups: un-paused vitamin K antagonist medication versus bridging using heparin. A healthy, non-anticoagulated cohort with equivalent surgery served as a control group. Main outcome measures were: the occurrence and frequency of postoperative bleeding, the number of removed teeth, the surgical technique of tooth removal (extraction/osteotomy/combined extraction and osteotomy) and the prothrombin time. Results In total, 475 patients were included in the study with 170 patients in the group of un-paused vitamin K antagonist medication VG, 135 patients in the Bridging group BG and 170 patients in the control group CG. Postoperative bleeding was significant: CG versus VG p = 0.004; CG versus BG p < 0.001, BG versus VG p < 0.001. A significant correlation of number of the extracted teeth in the BG (p = 0.014) and no significance in VG (p = 0.298) and CG (p = 0.210) and in the BG versus VG and CG with p < 0.001 in terms of surgical intervention extraction. No difference observed in terms of prothrombin time. Conclusions Bridging with heparin increases the risk for bleeding compared to un-paused vitamin K antagonist medication. The perioperative management of anticoagulated patients requires a well-coordinated interdisciplinary teamwork to minimize or at best avoid both: postoperative bleeding and thromboembolic incidences.

scholarly journals Management of Anticoagulated Patients in Dentoalveolar Surgery: A Retrospective Study Comparing Bridging Versus Unpaused Vitamin K Antagonist Medication.

2020 ◽  
Author(s):  
Mayte Buchbender ◽  
F Rößler ◽  
Marco Kesting ◽  
Gesche Frohwitter ◽  
Werner Adler ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Prothrombin Time ◽  
Vitamin K ◽  
Tooth Extraction ◽  
Postoperative Bleeding ◽  
Vitamin K Antagonist ◽  
Control Group ◽  
Risk For Bleeding ◽  
Tooth Removal ◽  
Anticoagulated Patients

Abstract Objectives: The aim of this study was to investigate the occurrence of postoperative bleeding following dentoalveolar surgery in patients with either continued vitamin K antagonist medication or perioperative bridging using heparin. Study design: A retrospective study was performed analyzing patients who underwent tooth extraction between 2012 and 2017. Patients were retrospectively allocated into two comparative groups: un-paused vitamin K antagonist medication versus bridging using heparin. A healthy, non-anticoagulated cohort with equivalent surgery served as a control group. Main outcome measures were: the occurrence and frequency of postoperative bleeding, the number of removed teeth, the surgical technique of tooth removal (extraction/ osteotomy/ combined extraction and osteotomy) and the prothrombin time.Results: In total, 475 patients were included in the study with 170 patients in the group of un-paused vitamin K antagonist medication VG, 135 patients in the Bridging group BG and 170 patients in the control group CG. Postoperative bleeding was significant: CG vs.VG p=0.004; CG vs. BG p<0.001, BG vs.VG p<0.001. A significant correlation of number of the extracted teeth in the BG (p=0.014) and no significance in VG (p=0.298) and CG (p=0.210) and in the BG vs. VG and CG with p<0.001 in terms of surgical intervention extraction. No difference observed in terms of prothrombin time.Conclusion: Bridging increases the risk for bleeding compared to un-paused vitamin K antagonist medication. The perioperative management of anticoagulated patients requires a well- coordinated interdisciplinary teamwork to minimize or at best avoid both: postoperative bleeding and thromboembolic incidences.

scholarly journals Effectivity of a joint didactic intervention by School for Patients on inappropriate control prothrombin time anticoagulated patients. Protocol for developing a randomized and controlled clinical trial.

2020 ◽  
Author(s):  
Leovigildo Ginel-Mendoza ◽  
Alfonso Hidalgo Hidalgo-Natera ◽  
Rocio Reina-Gonzalez ◽  
Rafael Poyato-Ramos ◽  
Inmaculada Lupianez-Perez ◽  
...  
Keyword(s):  
Social Support ◽  
Clinical Trial ◽  
Prothrombin Time ◽  
Vitamin K ◽  
Oral Anticoagulant ◽  
Vitamin K Antagonists ◽  
International Normalized Ratio ◽  
Control Group ◽  
Therapeutic Level ◽  
Anticoagulated Patients

Abstract Background Oral anticoagulant drugs represent an essential tool in thrombo-embolic events prevention. Most used are vitamin K antagonists, whose plasma level is monitored by measuring prothrombin time using the International Normalized Ratio. If it takes values out of the recommended range, the patient will have a higher risk of suffering from thromboembolic or hemorrhagic complications. Previous research has shown that about 33% of total patients keep values on inappropriate level. The purpose of the study is to improve International Normalized Ratio control figures by a joint didactic intervention based on the Junta de Andalucía School for Patients method that will be implemented by anticoagulated patients themselves. Methods A randomized clinical trial was carried out at primary care centers from one healthcare area in Málaga (Andalusia, Spain). Study population: patients included in an oral anticoagulant therapy program consisting in using vitamin K antagonists. First step detection of patients on oral anticoagulation program with International Normalized Ratio control on therapeutic level during 65% or less over total time. Second step: patients with inappropriate International Normalized Ratio control were included in two groups: Group 1 or Joint Intervention Group: patients were instructed a joint didactic intervention “from peer to peer”, by a previously trained and expert anticoagulated patient. Group 2 or Control Group: Control group performed usual clinical practice: people were schedule by nurses about one time per month, except cases in which controls were inappropriate; in those circumstances patients were schedule before that period expired. In order to built the study group and the control group, 312 individuals were required (156 in each group) to detect differences in INR figures equal or higher than 15% between both groups. Study variables time on therapeutic levels before and after intervention, sociodemographic variables, vital signs, existence of cardiovascular risk factors or accompanying diseases in the clinical records, laboratory test including complete blood count, bleeding time, and prothrombin time or partial thromboplastin time and blood chemistry, other prescribed drugs, and social support. Almost-experimental analytic study with before-after statistical analysis of the intervention were made. Lineal regression models were applied on main variables results (International Normalized Ratio value, time on therapeutic level) inputting sociodemographic variables, accompanying diseases and social support.

Correlation of non-vitamin K antagonist oral anticoagulant exposure and cerebral microbleeds in Chinese patients with atrial fibrillation

2018 ◽  
Vol 89 (7) ◽  
pp. 680-686 ◽  
Author(s):  
Yannie Soo ◽  
Jill Abrigo ◽  
Kam Tat Leung ◽  
Wenyan Liu ◽  
Bonnie Lam ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
White Matter ◽  
Vitamin K ◽  
Intracerebral Haemorrhage ◽  
Oral Anticoagulants ◽  
Vitamin K Antagonist ◽  
Cerebral Microbleeds ◽  
Chinese Patients ◽  
Control Group

Background and purposeCerebral microbleeds (CMBs) are radiological markers which predict future intracerebral haemorrhage. Researchers are exploring how CMBs can guide anticoagulation decisions in atrial fibrillation (AF). The purpose of this study is to evaluate the correlation of non-vitamin K antagonist oral anticoagulants (NOAC) exposure and prevalence of CMBs in Chinese patients with AF.MethodsWe prospectively recruited Chinese patients with AF on NOAC therapy of ≥30 days for 3T MRI brain for evaluation of CMBs and white matter hyperintensities. Patients with AF without prior exposure to oral anticoagulation were recruited as control group.ResultsA total of 282 patients were recruited, including 124 patients in NOAC group and 158 patients in control group. Mean duration of NOAC exposure was 723.8±500.3 days. CMBs were observed in 103 (36.5%) patients. No significant correlation was observed between duration of NOAC exposure and quantity of CMBs. After adjusting for confounding factors (ie, age, hypertension, labile hypertension, stroke history and white matter scores), previous intracerebral haemorrhage was predictive of CMBs (OR 15.28, 95% CI 1.81 to 129.16), particularly lobar CMBs (OR 5.37, 95% CI 1.27 to 22.6). While white matter score was predictive of mixed lobar CMBs (OR 1.65, 95% CI 1.1 to 2.5), both exposure and duration of NOAC use were not predictive of presence of CMBs.ConclusionsIn Chinese patients with AF, duration of NOAC exposure did not correlate with prevalence and burden of CMBs. Further studies with follow-up MRI are needed to determine if long-term NOAC therapy can lead to development of new CMBs.

Critical Role of Factors II and X During Coumarin Anticoagulation and Their Combined Measurement with a New Prothrombin Time Variant (Fiix-PT),

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 3354-3354
Author(s):  
Pall T. Onundarson ◽  
Brynja R. Gudmundsdottir ◽  
Charles W. Francis
Keyword(s):  
Prothrombin Time ◽  
Vitamin K ◽  
Vitamin K Antagonists ◽  
Critical Role ◽  
Patent Application ◽  
Maximum Velocity ◽  
Coagulation Factors ◽  
Clot Formation ◽  
Normal Platelet ◽  
Anticoagulated Patients

Abstract Abstract 3354 Introduction: Vitamin K antagonists (VKA) are monitored with prothrombin time (PT) based assays that are equally sensitive to reductions in factors II, VII or X. However, previous studies suggest that the anticoagulant effect of VKA depends primarily on reductions in factors II and X and not VII. Aim and methods: We compared the effect of vitamin K dependent (VKD) coagulation factors on PT (Quick and Owren methods) and also on rotational thromboelastometric (ROTEM) parameters. The experiments used normal platelet poor plasma (PPP) and PPP selectively immunodepleted of individual VKD factors, with and without added platelet phospholipid or washed platelets. Results: The PT was equally sensitive to reductions in factors II, VII or X. However, ROTEM parameters correlated poorly with the PT in anticoagulated patients` plasmas. ROTEM experiments showed that the clotting time, maximum velocity of clot formation and the maximum clot firmness were more affected by reductions in FII or FX than by FVII or FIX concentrations which had little influence except at very low concentrations. We developed a modified PT that was sensitive only to reductions in factors II and X by using factor II and X (Fiix) depleted plasma in the PT system. The Fiix-PT (Fiix-INR) correlated well with PT (INR) but the Fiix-INR fluctuated less than the INR in anticoagulated patients reflecting its insensitivity to FVII. Conclusion: The ROTEM results suggest that mild to moderate reductions in factors II or X are more important in clot formation than factors VII or IX at therapeutically relevant factor concentrations. Reductions in FII and X may therefore better reflect anticoagulation with VKA than FVII or IX. FVII may be a confounding source of unwanted variation in PT-INR. The new Fiix-PT that is sensitive only to FII and FX may more accurately reflect the degree of therapeutic anticoagulation in patients treated with VKA than do the current PT assays which may overestimate the fluctuation in anticoagulation. Disclosures: Onundarson: See i. other: Patent application for Fiix method in process. Gudmundsdottir:Other, see i: patent applicaiton filed for Fiix method.

scholarly journals A gyógyszer indukálta vérzékeny betegek fogorvosi, szájsebészeti ellátása: a 2015-ös hazai szakmai ajánlás alkalmazása és értékelése

2016 ◽  
Vol 157 (43) ◽  
pp. 1722-1728
Author(s):  
Dénes Lukács ◽  
Nóra Stáczer ◽  
László Vajta ◽  
Lajos Olasz ◽  
Árpád Joób-Fancsaly ◽  
...  
Keyword(s):  
Antiplatelet Therapy ◽  
Vitamin K ◽  
Dental Treatment ◽  
Oral Anticoagulant Therapy ◽  
Vitamin K Antagonists ◽  
Oral Anticoagulants ◽  
Postoperative Bleeding ◽  
Bleeding Risk ◽  
Night Duty ◽  
Anticoagulated Patients

Introduction: In 2015 a new Hungarian guideline was published regarding dental treatment and management of anticoagulated patients in agreement of the Hungarian Association of Oral and Maxillofacial Surgeons and the Dental Implantology Association of Hungarian Dentists. Aim: The aim of the authors was to evaluate the efficiency and safety of local hemostatic measures recommended by the guideline in anticoagulated patients. Method: In these patients, postoperative bleeding episodes were examined after dental and oral surgical treatments, retrospectively. Results: Overall 263 bleeding risk cases were treated; 138 patients with vitamin K antagonists, 97 patients with antiplatelet therapy and 6 patients with novel oral anticoagulants. Six patients (2.3%) had minor postoperative bleeding after the “one hour control”, while one patient needed a night duty support (0.5%). In contrast, 86 patients who were treated in rural practices neglecting the guideline attended the night duty with postoperative bleeding (3 patients treated with vitamin K antagonists, 24 patients taking low molecular weight heparin, 30 patients receiving antiplatelet therapy and one patient on novel oral anticoagulant therapy. Conclusions: The Hungarian guideline can be applied safely, without increasing the risk of postoperative bleeding, however, rural dental practices are frequently unprepared for these treatments. Orv. hetil., 2016, 157(43), 1722–1728.

scholarly journals Prolonged Prothrombin Time After Discontinuing Vitamin K Antagonist

2017 ◽  
Vol 63 (9) ◽  
pp. 1442-1444
Author(s):  
Mark W M Schellings ◽  
Moniek P M de Maat ◽  
Sacha de Lathouder ◽  
Floor Weerkamp
Keyword(s):  
Prothrombin Time ◽  
Vitamin K ◽  
Vitamin K Antagonist ◽  
Prolonged Prothrombin Time

scholarly journals Safety and efficacy of a strategy of vitamin K antagonist reversal with prothrombin complex concentrates compared to vitamin K in patients with hip fracture

2021 ◽  
Vol 64 (3) ◽  
pp. E330-E338
Author(s):  
Lucille Jay-Caillierez ◽  
Arnaud Friggeri ◽  
Anthony Viste ◽  
Mathilde Lefevre ◽  
Evelyne Decullier ◽  
...  
Keyword(s):  
Hip Fracture ◽  
Vitamin K ◽  
Study Groups ◽  
Hospital Length ◽  
Vitamin K Antagonist ◽  
Hospital Length Of Stay ◽  
Red Blood Cell Transfusion ◽  
Control Group ◽  
Number Of Patients ◽  
Hemorrhagic Complications

Background: Increased preoperative delay in patients with hip fractures may be responsible for increased morbidity and mortality. We hypothesized that a strategy of reversal of vitamin K antagonist (VKA) by prothrombin complexes concentrates (PCCs), as compared to vitamin K, is safe and reduces preoperative delay and hospital length of stay (LOS). Methods: In this pilot study, we reviewed the records of patients admitted to a university-affiliated hospital for hip fracture between Jan. 1, 2012, and Dec. 31, 2016, who were taking VKA. Patients were stratified according to reversal strategy (vitamin K v. PCC). Adverse effects, time to surgery, LOS and mortality were collected from the electronic medical record and were compared between the 2 study groups and a control group not treated with VKA. Results: A total of 141 patients were included in the study: 65 in the vitamin K group, 26 in the PCC group and 50 in the control group. The median preoperative delay in the PCC group (20 h [interquartile range (IQR)] 13–25 h]) and the control group (20 h [IQR 15–33 h]) was lower than that in the vitamin K group (45 h [IQR 31–52 h]) (p < 0.001). Patients in the PCC group had a shorter median hospital LOS than those in the vitamin K group (6 d [IQR 4–9 d] v. 8 d [IQR 6–11 d], p < 0.05). No difference was observed in the proportion of patients who received a red blood cell transfusion, or had thrombotic or hemorrhagic complications. No difference in mortality at 12 months was observed between the groups. Conclusion: In patients with hip fracture, the use of PCCs as compared to vitamin K to reverse the effect of VKA significantly reduced preoperative delay and hospital LOS, and was not associated with an increase in the rates of thrombotic or hemorrhagic complications. Prospective studies involving a greater number of patients are required to confirm these promising results.

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