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Manfredini M, Poli PP, Creminelli L, Porro A, Maiorana C, Beretta M. Comparative Risk of Bleeding of Anticoagulant Therapy with Vitamin K Antagonists (VKAs) and with Non-Vitamin K Antagonists in Patients Undergoing Dental Surgery. J Clin Med 2021; 10:5526. [PMID: 34884228 PMCID: PMC8658703 DOI: 10.3390/jcm10235526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/22/2021] [Accepted: 11/22/2021] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES A wide variety of approaches have been proposed to manage anticoagulant drugs in patients undergoing dental surgery; vitamin K antagonists and novel direct oral anticoagulants have been used. The present study aims to explore the existing evidence concerning the management of patients in anticoagulant therapy undergoing oral surgery procedures and to give suggestions related to peri- and post-operative measures. MATERIALS AND METHODS A comprehensive search of databases was conducted to identify studies that evaluated the relationship between direct oral anticoagulants and dental procedures. The present scoping review was realized in adherence with the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines. The publications varied from randomized controlled trials (RCT) to cohort trials. Only articles written in English language and published between 2000 to 2020 were screened. The studies were included if discussing the management of a patient in anticoagulant therapy (warfarin or direct oral anticoagulants) scheduled for tooth extraction. RESULTS 33 studies were selected and included in the qualitative review. Nineteen considered anticoagulant therapy with warfarin, six considered anticoagulant therapy with new oral anticoagulants and eight compared patients taking warfarin with patients taking direct oral anticoagulants. CONCLUSIONS No case of extractive surgery should alter the posology of the drug: thromboembolic risks derived from discontinuation are heavier than hemorrhagic risks. CLINICAL RELEVANCE direct oral anticoagulants are safer in terms of bleeding and manageability and bleeding episodes are manageable with local hemostatic measures.
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Affiliation(s)
| | | | | | - Alberto Porro
- Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, University of Milan, Via della Commenda 10, 20122 Milan, Italy; (M.M.); (P.P.P.); (L.C.); (C.M.); (M.B.)
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Does Platelet-Rich Fibrin Prevent Hemorrhagic Complications After Dental Extractions in Patients Using Oral Anticoagulant Therapy? J Oral Maxillofac Surg 2021; 79:2215-2226. [PMID: 34343502 DOI: 10.1016/j.joms.2021.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 06/30/2021] [Accepted: 07/01/2021] [Indexed: 01/05/2023]
Abstract
PURPOSE The number of anticoagulated patients requiring dental extractions and other minor dentoalveolar surgical procedures has increased significantly. The purpose of this study was to determine whether the use of platelet-rich fibrin (PRF) prevents hemorrhagic complications after dental extractions in patients being treated with oral anticoagulants. METHODS A 2-phase PROSPERO-registered systematic review of published within-subject controlled trials (CRD42020186678) was conducted in accordance with the PRISMA statement. Searches were conducted through Medline via PubMed, Web of Science, LILACS, Central Cochrane, Scopus, DOSS, and Google Scholar, until May 2020. The predictor variable was the study group (PRF vs use/non-use of other hemostatic agents). The main outcome of interest was the risk of bleeding after tooth extraction and the covariates were postoperative complications. Data analysis included synthesis of results, risk of bias (RoB) evaluation, meta-analysis (random effects; I²-based heterogeneity; 95% confidence), and certainty of evidence assessment. RESULTS From a total of 216 articles, 3 articles (low-moderate RoB) were included for evaluation in this systematic review and meta-analysis. A total of 130 patients were involved. The outcomes of the meta-analysis showed that the use of PRF in extraction wounds did not reduce the risk of bleeding after extraction in anticoagulated patients (P= .330; I² = 99%). Furthermore, the use of PRF did not improve pain scores (P = .470; I² = 96%) or the risk of postoperative alveolitis (P = .4300; I² = 38%) in anticoagulated patients. The certainty of the evidence ranged from moderate to low. CONCLUSIONS The findings of this systematic review and meta-analysis suggest that PRF does not prevent hemorrhagic complications after tooth extraction in patients using oral anticoagulant therapy.
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Kubota K, Yamaga E, Ueda K, Inokoshi M, Minakuchi S. Comparison of cardiovascular response between patients on warfarin and hypertensive patients not on warfarin during dental extraction. Clin Oral Investig 2020; 25:2141-2150. [PMID: 32808177 DOI: 10.1007/s00784-020-03526-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 08/12/2020] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To evaluate cardiovascular response in patients on warfarin and hypertensive patients not on warfarin during dental extraction. MATERIALS AND METHODS This retrospective study included 53 patients who had undergone dental extraction while on warfarin (mean age 78.8 ± 6.3 years, 26 men) and 66 with hypertension who had undergone dental extraction but were not on warfarin (mean age 77.4 ± 6.8 years, 22 men). Vital signs were monitored in both groups during extraction. RESULTS The highest systolic blood pressure (SBP) values (mean 150.1 ± 21.1 mmHg) were observed in patients on warfarin before (9.0%) and after (10.3%) administration of local anesthesia (LA), during extraction (39.7%), and during (33.3%) and after (7.7%) suturing (n = 78; p < 0.01), and in hypertensive patients not receiving warfarin (160.6 ± 24.8 mmHg) before (19.2%) and after (27.3%) administration of LA, during extraction (29.3%), and during (18.2%) and after (6.1%) suturing (n = 99; p < 0.01). The highest SBP was linearly correlated with SBP before administration of LA in patients on warfarin (highest SBP = 0.9415 × SBP before LA + 23.243, R2 = 0.75481) and in hypertensive patients not on warfarin (highest SBP = 1.0027 × SBP before LA + 15.789, R2 = 0.60341). CONCLUSIONS The highest SBP was not distributed evenly between patients on warfarin and hypertensive patients not on warfarin during dental extraction and was strongly associated with SBP before LA regardless of anticoagulant status. CLINICAL RELEVANCE Thorough management of SBP is required in patients on warfarin to avoid thromboembolism and major hemorrhagic complications. Knowing the SBP value before dental treatment would help predict the risk of cardiovascular complications.
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Affiliation(s)
- Kazumasa Kubota
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.
| | - Eijiro Yamaga
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Kaori Ueda
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Masanao Inokoshi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Shunsuke Minakuchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
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de Almeida Barros Mourão CF, Miron RJ, de Mello Machado RC, Ghanaati S, Alves GG, Calasans-Maia MD. Usefulness of platelet-rich fibrin as a hemostatic agent after dental extractions in patients receiving anticoagulant therapy with factor Xa inhibitors: a case series. Oral Maxillofac Surg 2019; 23:381-386. [PMID: 31102080 DOI: 10.1007/s10006-019-00769-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
PURPOSE To evaluate the clinical outcomes of platelet-rich fibrin (PRF) application for hemostasis after dental extraction in patients receiving anticoagulant therapy with factor Xa inhibitors. METHODS In total, 25 patients receiving anticoagulant therapy with rivaroxaban or apixaban who required routine dental extraction were evaluated. In all patients, PRF was used for hemostasis in addition to adapting sutures. Bleeding was subjectively assessed using a sterilize gauze pad at 24, 48, and 72 h after the procedure. RESULTS All invited participants (n = 25) consented to participate. The PRF clots successfully arrested bleeding after extraction in all patients, with no complications at any time point after the procedure. Favorable soft tissue healing was observed during suture removal at 10 days after the procedure in all patients, with no signs of infection or late healing. CONCLUSIONS The results of this case series indicate that PRF is a promising natural hemostatic agent for the management of bleeding after dental extraction in patients receiving factor Xa inhibitor therapy. Further controlled clinical studies with larger patient samples are necessary to clarify the findings of this case series.
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Affiliation(s)
- Carlos Fernando de Almeida Barros Mourão
- Department of Molecular and Cell Biology, Institute of Biology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
- Department of Oral Surgery, Dentistry School, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
| | - Richard J Miron
- Department of Periodontology, University of Bern, Bern, Switzerland
| | | | - Shahram Ghanaati
- Department of Maxillofacial, Clinic for Maxillofacial and Plastic Surgery, Johann Wolfgang Goethe University, Frankfurt Am Main, Germany
| | - Gutemberg Gomes Alves
- Department of Molecular and Cell Biology, Institute of Biology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Mônica Diuana Calasans-Maia
- Department of Oral Surgery, Dentistry School, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
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Rocha AL, Oliveira SR, Souza AF, Travassos DV, Abreu LG, Ribeiro DD, Silva TA. Bleeding assessment in oral surgery: A cohort study comparing individuals on anticoagulant therapy and a non-anticoagulated group. J Craniomaxillofac Surg 2019; 47:798-804. [PMID: 30792032 DOI: 10.1016/j.jcms.2019.01.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/15/2019] [Accepted: 01/31/2019] [Indexed: 01/19/2023] Open
Abstract
Some prospective studies have been designed specifically to investigate perioperative bleeding in dental surgery. The quantitative assessment of intraoperative blood loss can be useful for indicating the real risk of bleeding complications, especially in medically compromised individuals. The aim of this study was to evaluate the pattern of bleeding in individuals under vitamin K antagonist (VKA) therapy and non-anticoagulated individuals submitted to dental extractions. Perioperative bleeding was evaluated by using a total collected bleeding corrected by absorbance reading (dental bleeding score). 138 procedures were performed. When the perioperative dental bleeding score was correlated with the number of extracted teeth, the quantity of bleeding was found to be directly proportional to the procedure. Extractions of two or more teeth presented higher scores than single extractions (p = 0.003). In a comparative analysis between the VKA and non-anticoagulated groups, no significant difference in the scores was found. The previous history of complications in dental procedures (p = 0.001) and the use of additional hemostatic measures were higher in the VKA group (p = 0.017). VKA therapy did not impact significantly the volume of blood lost during dental extractions. Perioperative bleeding assessment might be a useful parameter for evaluating patients under antithrombotic treatment.
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Affiliation(s)
- Amanda Leal Rocha
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Sicilia Rezende Oliveira
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Alessandra Figueiredo Souza
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Denise Vieira Travassos
- Department of Community and Preventive Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Lucas Guimarães Abreu
- Department of Pediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Daniel Dias Ribeiro
- Department of Hematology, Faculty of Medicine, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Tarcília Aparecida Silva
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Minas Gerais, Brazil.
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da Silva R, Gadelha T, Luiz R, Torres S. Intra-alveolar epsilon-aminocaproic acid for the control of post-extraction bleeding in anticoagulated patients: randomized clinical trial. Int J Oral Maxillofac Surg 2018; 47:1138-1144. [DOI: 10.1016/j.ijom.2018.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 02/14/2018] [Accepted: 02/23/2018] [Indexed: 10/17/2022]
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Secondary Bleedings in Oral Surgery Emergency Service: A Cross-Sectional Study. Int J Dent 2018; 2018:6595406. [PMID: 29971108 PMCID: PMC6008757 DOI: 10.1155/2018/6595406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 03/23/2018] [Accepted: 04/04/2018] [Indexed: 11/17/2022] Open
Abstract
Introduction Bleeding after dental surgery is still a common cause for emergency presentation in patients using anticoagulants. Our aim was to analyze pertinent characteristic features on the one hand and to bare existing problems in handling on the other. Materials and Methods The study included 76 patients. We documented basic data, anticoagulant medication, type of surgery, and tooth socket sutures in respective patients. Results The vast majority of patients took a coumarin derivative (41) and acetylsalicylic acid (27). Nine (12%) of the patients had to be hospitalized due to ongoing bleeding despite local haemostyptic steps and/or circulatory dysregulation. Most patients could be successfully treated in outpatient settings. No statistically significant correlation between bleeding, level of INR value, number of extracted teeth, and sewed alveoli could be shown. Sixty-five percent of cases with tooth extractions did not have suture of tooth sockets. Eighty-seven percent of the patients denied being informed about possible self-treatment options by their surgeon/dentist, and none of the patients got presurgical-fabricated bandage plate(s). Conclusions Patients taking coumarin derivative currently, furthermore, represent the biggest anticoagulant after-bleeding group in dentoalveolar surgery. The major part of after-bleedings (90%) can be handled in an outpatient setting with simplest surgical interventions. Unfortunately, the biggest part of the patient collective got no suture, no prefabricated dental bandage plate(s), and no explanation by their dentist how to handle in case of after-bleeding. Therefore, dental practitioners should furthermore get enlightenment on how to prevent after-bleeding situations.
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Tranexamic acid as a local hemostasis method after dental extraction in patients on warfarin: a randomized controlled clinical study. Clin Oral Investig 2018; 22:2281-2289. [DOI: 10.1007/s00784-017-2327-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 12/21/2017] [Indexed: 10/18/2022]
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Lillis T, Didagelos M, Lillis L, Theodoridis C, Karvounis H, Ziakas A. Impact of Post-Exodontia Bleeding in Cardiovascular Patients: A New Classification Proposal. Open Cardiovasc Med J 2017; 11:102-110. [PMID: 29204220 PMCID: PMC5688390 DOI: 10.2174/1874192401711010102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/11/2017] [Accepted: 09/15/2017] [Indexed: 11/22/2022] Open
Abstract
Background: Exodontia (dental extraction), being the most frequent minor surgical procedure in the general population, inevitably involves a large number of patients on antithrombotic medication. Current experience shows that there is a degree of confusion in managing these patients. Description: Post-exodontia bleeding, a natural consequence of every dental extraction with no or minor clinical significance in the vast majority of cases, often appears to be of major concern to both patients and healthcare practitioners (dentists or physicians), either because of the alarming nature of oral bleeding itself or because of the distorted perception about its importance. These concerns are enhanced by the lack of a universal standardized definition of post-exodontia bleeding and by the fact that all currently available post-exodontia bleeding definitions bear intrinsic limitations and tend to overestimate its clinical significance. Conclusion: In order to overcome the aforementioned issues, this article presents an overview of post-extraction bleeding and proposes a classification, based on the well-recognized Bleeding Academic Research Consortium (BARC) bleeding definition, aiming at reducing heterogeneity in this field.
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Affiliation(s)
- T Lillis
- Department of Oral Surgery, Implantology and Radiology, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - M Didagelos
- 1 Department of Cardiology, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Thessaloniki, Greece
| | - L Lillis
- 1 Department of Cardiology, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Thessaloniki, Greece
| | - C Theodoridis
- Department of Oral Surgery, Implantology and Radiology, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - H Karvounis
- 1 Department of Cardiology, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Thessaloniki, Greece
| | - A Ziakas
- 1 Department of Cardiology, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Thessaloniki, Greece
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Caliskan M, Tükel HC, Benlidayi ME, Deniz A. Is it necessary to alter anticoagulation therapy for tooth extraction in patients taking direct oral anticoagulants? Med Oral Patol Oral Cir Bucal 2017; 22:e767-e773. [PMID: 29053656 PMCID: PMC5813996 DOI: 10.4317/medoral.21942] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 09/09/2017] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND The number of patients using direct oral anticoagulants (DOACs) instead of vitamin K antagonists (VKA) is increasing and there is limited data on the safety of tooth extractions in patients taking DOACs. The aim of this study was to compare the amount of bleeding (AOB) and postoperative complications after tooth extractions between patients taking VKAs and patients taking DOACs without altering the anticoaguation therapy. MATERIAL AND METHODS The study consisted of four groups: Direct thrombin inhibitor group, factor Xa inhibitor group, warfarin group and a control group. A single tooth was extracted in each patient and routine coagulation test values were recorded prior to extraction. AOB was measured for 20 minutes after tooth extraction. The patients were evaluated on 2nd and 7th days after extraction for bleeding. Status of bleeding was classified as no bleeding, mild bleeding controlled by gauze pads, moderate bleeding controlled by hemostatic agents and severe bleeding required hospitalization. Analysis of variance, chi square test and correlation analysis were used for statistical analysis of data. RESULTS A total of 84 patients (48 male, 36 female) were included in this study. The mean age of patients was 57 (38-87) years. Mean AOB was 1388.6±913.0, 1909.29±1063.1, 3673±1415.4, 1593.33±672.5 mg for direct thrombin inhibitor, factor Xa inhibitor, warfarin and control groups respectively. Mean AOB was significantly higher for warfarin group, compared to other groups (p<0.05). The number of patients showing mild and moderate bleeding was significantly higher in warfarin group compared to other groups on the 2nd postextraction day (p=0.001). No bleeding was occurred in control group on 2nd and 7th postextraction days and no bleeding was occurred in direct thrombin inhibitor group on 7th postextraction day. The number of bleeding events among groups was not statistically significant on 7th postextraction day (p=0.251). CONCLUSIONS Patients taking warfarin had more bleeding compared to patients taking direct oral anticoagulants after tooth extractions. In patients taking direct oral anticoagulants simple tooth extractions can be safely carried out without altering the anticaogulant regimen with the use of local hemostatic agents.
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Affiliation(s)
- M Caliskan
- Oral and Maxillofacial Surgery, Faculty of Dentistry, Cukurova University, Diş Hekimliği Fakültesi, Ağiz ve Çene Cerrahisi ABD, 01330 Sariçam, Adana, Türkiye,
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Lanau N, Mareque J, Giner L, Zabalza M. Direct oral anticoagulants and its implications in dentistry. A review of literature. J Clin Exp Dent 2017; 9:e1346-e1354. [PMID: 29302288 PMCID: PMC5741849 DOI: 10.4317/jced.54004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 09/05/2017] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Four novel direct oral anticoagulants (DOACs) named dabigatran, rivaroxaban, edoxaban and apixaban have been recently introduced to overcome some of the drawbacks of existing anticoagulants. They have less interactions and do not require routine monitoring. However, there is not enough scientific data about the protocol to apply in these patients on DOACs undergoing dental treatment. Thus is necessary to evaluate the potential bleeding risk of these drugs, the possibility of thromboembolic events occurring if they are withdrawn or the need to change to heparin previously. MATERIAL AND METHODS A comprehensive search of the PubMed, Scopus and ISI Web of Science databases was conducted to identify studies that evaluated the relationship between direct oral anticoagulants and dental procedures. The quality of the reported information was assessed following the PRISMA statement. RESULTS Eleven studies that met the inclusion criteria were included in the review: 2 randomized clinical trials, 3 prospective studies, 3 retrospective studies, 2 case series and 1 case report. CONCLUSIONS DOACs are safe drugs in terms of bleeding. The possible postoperative bleeding complications are manageable with conventional haemostasis measurements. The bridging approach with heparin does not seem to be recommended. Consensus among the professionals involved in the management of the patient is fundamental in invasive dental treatments and in complex patients. Key words:Oral anticoagulants, DOAC, NOAC, dabigatran, rivaroxaban, apixaban, edoxaban, bleeding, oral surgery.
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Affiliation(s)
- Neus Lanau
- DDS, PhD Student. Faculty of Dentistry. Universitat Internacional de Catalunya, Spain
| | - Javier Mareque
- MD, DDS, PhD. Vice-dean for Research. Faculty of Dentistry. Universitat Internacional de Catalunya, Spain
| | - Lluis Giner
- MD, DDS, PhD. Dean of the Faculty of Dentistry. Universitat Internacional de Catalunya, Spain
| | - Michel Zabalza
- MD, PhD. Faculty of Medicine and Dentistry. Universitat Internacional de Catalunya, Spain
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Souza AF, Rocha AL, Castro WH, Gelape CL, Nunes MCP, Oliveira SR, Travassos DV, Silva TA. Dental management for patients undergoing heart valve surgery. J Card Surg 2017; 32:627-632. [DOI: 10.1111/jocs.13211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Alessandra F. Souza
- Faculty of Dentistry; Department of Community and Preventive Dentistry; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Amanda L. Rocha
- Faculty of Dentistry; Department of Oral Surgery and Pathology; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Wagner H. Castro
- Faculty of Dentistry; Department of Oral Surgery and Pathology; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Claudio L. Gelape
- Faculty of Medicine; Department of Surgery; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Maria Carmo P. Nunes
- Faculty of Medicine; Department of Surgery; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Sicilia R. Oliveira
- Faculty of Dentistry; Department of Oral Surgery and Pathology; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Denise V. Travassos
- Faculty of Dentistry; Department of Community and Preventive Dentistry; Universidade Federal de Minas Gerais; Minas Gerais Brazil
| | - Tarcília A. Silva
- Faculty of Dentistry; Department of Oral Surgery and Pathology; Universidade Federal de Minas Gerais; Minas Gerais Brazil
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Effect of Low-Dose Aspirin on Bleeding Following Exodontia: A Prospective Clinical Study. J Maxillofac Oral Surg 2017; 17:350-355. [PMID: 30034154 DOI: 10.1007/s12663-017-1034-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 07/14/2017] [Indexed: 10/19/2022] Open
Abstract
Purpose This research aims to study the effects of low-dose aspirin on bleeding after exodontia and to compare statistically and analyze perioperative blood loss during exodontia in patients on aspirin therapy and healthy patients and also to discuss the various measures if required necessary for controlling postoperative bleeding in simple and uncomplicated exodontia. Materials and Methods The study included 100 patients, ranging in age from 30 to 60 years. The patients were divided into two groups, a test group consisting of 50 patients who were on a daily dose of 75-150 mg of aspirin and a control group consisting of 50 patients not on any antiplatelet therapy. All extraction procedures were performed on outpatient basis. Patients were operated under local anesthesia. Post-extraction sockets were checked for bleeding immediately (30 min) and followed up at 24, 48, and 72 h, and 1 week, after the procedure. Results Amount of intraoperative blood loss was similar in both test and control groups, and there was no excessive postoperative bleeding in any case. Out of 100 patients, only three patients of test group and two patients of control group required level II hemostatic measures and two patients of test group needed level III measures. Conclusion We could reach a conclusion and recommend that patients on long-term low-dose aspirin (75-150 mg) need not to discontinue their aspirin dose prior to routine exodontia and can be carried out safely with enhanced local hemostatic measures, if required.
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Shi Q, Xu J, Zhang T, Zhang B, Liu H. Post-operative Bleeding Risk in Dental Surgery for Patients on Oral Anticoagulant Therapy: A Meta-analysis of Observational Studies. Front Pharmacol 2017; 8:58. [PMID: 28228727 PMCID: PMC5296357 DOI: 10.3389/fphar.2017.00058] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 01/26/2017] [Indexed: 01/19/2023] Open
Abstract
Background and Objective: Minor dental surgery is invasive and hemorrhagic. Thus, in patients treated with anticoagulants, the bleeding risk related to these invasive procedures is concerning. The aim of this meta-analysis is to evaluate this risk by comparing the post-operative bleeding rates of oral anticoagulation treatment (OAT) patients (without interrupted or altered anticoagulant intake) with non-OAT patients. Methods: PubMed, Embase and the Cochrane Library were searched for eligible studies that compared the post-operative (following minor dental surgery) bleeding rates of OAT patients without interrupted or altered therapy with those of non-OAT patients. Relative risk (RR) and 95% confidence interval (CI) were calculated. Subgroup analyses were used to identify the association between the bleeding rate and different dental surgeries or anticoagulants. Results: Thirty two full text articles were assessed for eligibility and 20 studies were excluded according to the selection criteria. Finally, 12 studies and a total of 2102 OAT patients and 2271 non-OAT patients were included. A pooled analysis indicated that the post-operative bleeding risk in OAT patients is higher than that of non-OAT patients (RR: 2.794, 95% CI: 1.722-4.532, P = 0.000). The pooled RRs in the dental implant surgery and dental extraction subgroups were 2.136 (95% CI: 0.825-5.531, P = 0.118) and 2.003 (95% CI: 0.987-4.063, P = 0.054), respectively. As for the different oral anticoagulants, the pooled RR in the subgroup of new oral anticoagulants (NOACs) was 1.603 (95% CI: 0.430-5.980, P = 0.482), while the pooled RR in the vitamin K antagonists subgroup was 3.067 (95% CI: 1.838-5.118, P = 0.000). Conclusion: Under current evidence, OAT patients were under a higher post-operative bleeding risk than the non-OAT patients following minor dental surgery. For the dental implant surgeries and dental extractions, our study failed to demonstrate a higher risk of bleeding in the OAT patients compared with the non-OAT patients. Besides, The NOACs might be safer than the vitamin K antagonists in dental implant surgery. However, more well-designed studies are required for future research.
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Affiliation(s)
- Quan Shi
- Institute of Stomatology, Chinese PLA General Hospital Beijing, China
| | - Juan Xu
- Institute of Stomatology, Chinese PLA General Hospital Beijing, China
| | - Tong Zhang
- Institute of Stomatology, Chinese PLA General Hospital Beijing, China
| | - Bin Zhang
- Institute of Stomatology, Chinese PLA General Hospital Beijing, China
| | - Hongchen Liu
- Institute of Stomatology, Chinese PLA General Hospital Beijing, China
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16
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AAOM Clinical Practice Statement. Oral Surg Oral Med Oral Pathol Oral Radiol 2016; 122:702-704. [DOI: 10.1016/j.oooo.2016.06.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 06/10/2016] [Accepted: 06/11/2016] [Indexed: 11/22/2022]
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17
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Erden İ, Çakcak Erden E, Aksu T, Gölcük ŞE, Turan B, Erkol A, Akçakoyun M, Sayın T. Comparison of uninterrupted warfarin and bridging therapy using low-molecular weight heparin with respect to the severity of bleeding after dental extractions in patients with prosthetic valves. Anatol J Cardiol 2015; 16:467-473. [PMID: 26645263 PMCID: PMC5331392 DOI: 10.5152/anatoljcardiol.2015.6130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Objective: The management of anticoagulated patients with warfarin during dental extraction is an intricate issue. We carefully designed the current study so that the amount of bleeding was measured with objective methods and the data from the same patient in different dental extraction appointments could be compared, eliminating the bleeding diathesis differences of patients. Methods: This prospective and controlled study was conducted in 36 adult patients with prosthetic valve requiring multiple tooth extractions. The first dental extraction was performed without the discontinuation of warfarin therapy, and the second procedure was performed with a discontinuation of warfarin and bridging with low-molecular weight heparin (LMWH). The two dental extraction protocols in the same patient group were compared. The total amount of bleeding was calculated as the difference between the weights of gauze swabs used before and after the tamponade; the number of gauze swabs used for bleeding control in the first 48 h was recorded. Result: The median number of used gauze swabs was 2.5 (IQR: 1–5) and 3.0 (IQR: 2–7) in the first and second dental extraction procedures, respectively. The median bleeding time was 50.0 (IQR: 20–100) in the first procedure compared with 60.0 (IQR: 40–140) min in the second procedure. The mean amounts of bleeding were 2194±1418 mg in the first dental extraction procedure and 2950±1694 mg in the second dental extraction procedure. The median number of used gauze swabs, the median bleeding time, and the mean amount of bleeding were statistically higher in the second dental extraction procedure (p<0.001). Conclusion: Continued warfarin treatment at the time of dental extractions reduces the total amount of bleeding compared with bridging therapy in patients with prosthetic valves.
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Affiliation(s)
- İsmail Erden
- Department of Cardiology, Kocaeli Derince Training and Research Hospital; Kocaeli-Turkey.
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Shah AH, Khalil HS, Kola MZ. Dental management of a patient fitted with subcutaneous Implantable Cardioverter Defibrillator device and concomitant warfarin treatment. Saudi Dent J 2015; 27:165-70. [PMID: 26236132 PMCID: PMC4501466 DOI: 10.1016/j.sdentj.2014.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 10/18/2014] [Accepted: 11/19/2014] [Indexed: 11/16/2022] Open
Abstract
Automated Implantable Cardioverter Defibrillators (AICD), simply known as an Implantable Cardioverter Defibrillator (ICD), has been used in patients for more than 30 years. An Implantable Cardioverter Defibrillator (ICD) is a small battery-powered electrical impulse generator that is implanted in patients who are at a risk of sudden cardiac death due to ventricular fibrillation, ventricular tachycardia or any such related event. Typically, patients with these types of occurrences are on anticoagulant therapy. The desired International Normalized Ratio (INR) for these patients is in the range of 2–3 to prevent any subsequent cardiac event. These patients possess a challenge to the dentist in many ways, especially during oral surgical procedures, and these challenges include risk of sudden death, control of post-operative bleeding and pain. This article presents the dental management of a 60 year-old person with an ICD and concomitant anticoagulant therapy. The patient was on multiple medications and was treated for a grossly neglected mouth with multiple carious root stumps. This case report outlines the important issues in managing patients fitted with an ICD device and at a risk of sudden cardiac death.
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Affiliation(s)
- Altaf Hussain Shah
- Department of Preventive Dental Sciences, Salman bin Abdulaziz University, AlKharj, Saudi Arabia
| | - Hesham Saleh Khalil
- Department of Maxillofacial Surgery, College of Dentistry, King Saud University, Saudi Arabia
| | - Mohammed Zaheer Kola
- Department of Prosthodontic Dental Sciences, College of Dentistry, Salman bin Abdulaziz University, AlKharj, Saudi Arabia
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19
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Dental surgery in anticoagulated patients—stop the interruption. Oral Surg Oral Med Oral Pathol Oral Radiol 2015; 119:136-57. [DOI: 10.1016/j.oooo.2014.10.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/06/2014] [Accepted: 10/15/2014] [Indexed: 01/12/2023]
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20
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Iwabuchi H, Imai Y, Asanami S, Shirakawa M, Yamane GY, Ogiuchi H, Kurashina K, Miyata M, Nakao H, Imai H. Evaluation of postextraction bleeding incidence to compare patients receiving and not receiving warfarin therapy: a cross-sectional, multicentre, observational study. BMJ Open 2014; 4:e005777. [PMID: 25510886 PMCID: PMC4267073 DOI: 10.1136/bmjopen-2014-005777] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
OBJECTIVES We investigated incidence and risk factors for postextraction bleeding in patients receiving warfarin and those not receiving anticoagulation therapy. DESIGN Cross-sectional, multicentre, observational study. SETTING 26 hospitals where an oral surgeon is available. PARTICIPANTS Data on 2817 teeth (from 496 patients receiving warfarin, 2321 patients not receiving warfarin; mean age (SD): 62.2 (17.6)) extracted between 1 November 2008 and 31 March 2010, were collected. Warfarin-receiving patients were eligible when prothrombin time-international normalised ratio (PT-INR) measured within 7 days prior to the extraction was less than 3.0. INTERVENTIONS Simple dental extraction was performed, and incidence of postextraction bleeding and comorbidities were recorded. PRIMARY AND SECONDARY OUTCOME MEASURES Postextraction bleeding not controlled by basic haemostasis procedure was clinically significant. RESULTS Bleeding events were reported for 35 (7.1%) and 49 (2.1%) teeth, of which 18 (3.6%) and 9 (0.4%) teeth were considered clinically significant, in warfarin and non-warfarin groups, respectively, the difference between which was 3.24% (CI 1.58% to 4.90%). The incidence rates by patients were 2.77% and 0.39%, in warfarin and non-warfarin groups, respectively (incidence difference 2.38%, CI 0.65% to 4/10%). Univariate analyses showed that age (OR 0.197, p=0.001), PT-INR (OR 3.635, p=0.003), mandibular foramen conduction anaesthesia (OR 4.854, p=0.050) and formation of abnormal granulation tissue in extraction socket (OR 2.900, p=0.031) significantly correlate with bleeding incidence. Multivariate analysis revealed that age (OR 0.126, p=0.001), antiplatelet drugs (OR 0.100, p=0.049), PT-INR (OR 7.797, p=0.001) and history of acute inflammation at extraction site (OR 3.722, p=0.037) were significant risk factors for postextraction bleeding. CONCLUSIONS Our results suggest that there is slight but significant increase in the incidences of postextraction bleeding in patients receiving warfarin. Although absolute incidence was low in both groups, the bleeding risk is not negligible.
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Affiliation(s)
- Hiroshi Iwabuchi
- Department of Oral and Maxillofacial Surgery, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
| | - Yutaka Imai
- Department of Oral & Maxillofacial Surgery, Dokkyo Medical University School of Medicine, Shimotsuga-gun, Tochigi, Japan
| | - Soichiro Asanami
- Department of Dentistry and Implant Center, Sanno Hospital, Minato-ku, Tokyo, Japan
| | | | | | - Hideki Ogiuchi
- Tokyo Women's Medical University, Shinjuku-ku, Tokyo, Japan
| | - Kenji Kurashina
- Oral & Dental Center, Aizawa Hospital, Matsumoto, Nagano, Japan
| | - Masaru Miyata
- Department of Dentistry and Oral Surgery, Ishikawa Prefectural Central Hospital, Kanazawa, Ishikawa, Japan
| | - Hiroyuki Nakao
- Department of Epidemiology, National Institute of Public Health of Japan, Wako, Saitama, Japan
| | - Hirohisa Imai
- Department of Epidemiology, National Institute of Public Health of Japan, Wako, Saitama, Japan
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21
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Abstract
Background Warfarin is one of the most common oral anticoagulants used to prevent thromboembolic episodes. The benefits of discontinuation of this drug before simple surgical procedures are not clear and this approach could be associated with complications. The aim of this study was to evaluate the risk of bleeding in a series of 35 patients (in cases where the international normalized ratio [INR] is less than 4) following simple tooth extraction without modification of the warfarin dose given to patients. Methods Thirty-five patients taking warfarin who had been referred to the Oral and Maxillofacial Department, College of Dentistry, King Saud University, for dental extractions were included in the study. Exclusion criteria included patients with an INR of ≥4 or with a history of liver disease or coagulopathies. No alteration was made in warfarin dose, and the CoaguChek System was used to identify the INR on the same day of dental extraction. Bleeding from the extraction site was evaluated and recorded immediately after extraction until the second day. Results A total of 35 patients (16 women and 19 men) aged between 38 and 57 years (mean =48.7) were included in the present study. All patients underwent simple one-tooth extraction while undergoing warfarin treatment. Oozing, considered mild bleeding and which did not need intervention was seen in 88.6% of patients. Moderate bleeding occurred in 11.4% of all cases. The INR of the patients ranged from 2.00 to 3.50, with 77.2% of patients having INR between 2.0 and 2.5 on the day of extraction. No severe bleeding which needed hospital management was encountered after any of the extractions. The patients who suffered moderate bleeding were returned to the clinic where they received local treatment measures to control bleeding. Moderate bleeding occurred only in four patients, where three had INR between 3.1 and 3.5, and one with INR less than 3. Conclusion In the present study, we have shown that simple tooth extraction in patients on warfarin treatment can be performed safely without high risk of bleeding, providing that the INR is equal or less than 3.5 on the day of extraction. A close follow-up and monitoring of patients taking warfarin is mandatory after dental extraction.
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Affiliation(s)
- Walid Ahmed Abdullah
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia ; Department of Oral and Maxillofacial Surgery, College of Dentistry, Mansoura University, Mansoura, Egypt
| | - Hesham Khalil
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia
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Ohba S, Yoshimura H, Matsuda S, Kobayashi J, Kimura T, Aiki M, Nagase J, Ishimaru K, Sano K. Risk factors for postoperative hemorrhage after minor oral surgery in patients treated with antithrombotic agents. Odontology 2014; 103:227-32. [PMID: 24614985 DOI: 10.1007/s10266-014-0150-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Accepted: 01/17/2014] [Indexed: 11/25/2022]
Abstract
It has been proposed that minor oral surgery can be performed safely in patients taking antithrombotic therapy without interrupting treatment; however, there is little evidence-based guidance about how to manage postoperative hemorrhage in patients taking antithrombotics, and few randomized trials that help to inform the risk-benefit ratio of continuing or suspending antithrombotic therapy. The aim of this study was to identify risk factors for postoperative hemorrhage to create a protocol for patients undergoing minor oral surgery with antithrombotic therapy. One hundred and two patients were enrolled, who subsequently underwent 142 minor oral surgical procedures while taking antithrombotic therapy. Demographic details including age and sex, laboratory coagulation investigations, and episodes of postoperative hemorrhage were recorded. The prothrombin time-international normalized ratio (PT-INR) of participants taking warfarin was <3.0 in all cases (mean 1.89 ± standard deviation 0.52; range 1.11-2.82). The activated partial thromboplastin time (APTT) was significantly associated with postoperative hemorrhage, which was significantly increased in patients taking warfarin alone or in combination with an antiplatelet agent compared with an antiplatelet agent alone. In 7 cases, postoperative hemorrhage continued for 4 days and more, requiring additional local hemostatic management. Our findings suggest that minor oral surgery can be performed under antithrombotic therapy without the need of discontinuing the antithrombotic agents. Local hemostatic materials did not suppress postoperative hemorrhage. APTT is a possible prediction factor for postoperative hemorrhage in such patients and, therefore, should be determined prior to minor oral surgery in addition to PT-INR value.
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Affiliation(s)
- Seigo Ohba
- Division of Dentistry and Oral Surgery, Department of Sensory and Locomotor Medicine, Faculty of Medical Sciences, University of Fukui, 23-3 Shimoaizuki, Matsuoka, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan,
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23
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Okamoto T, Ishikawa I, Kumasaka A, Morita S, Katagiri S, Okano T, Ando T. Blue-violet light-emitting diode irradiation in combination with hemostatic gelatin sponge (Spongel) application ameliorates immediate socket bleeding in patients taking warfarin. Oral Surg Oral Med Oral Pathol Oral Radiol 2014; 117:170-7. [DOI: 10.1016/j.oooo.2013.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 09/05/2013] [Accepted: 09/09/2013] [Indexed: 10/25/2022]
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Herlich A. Anesthetic emergencies in oral surgery: malignant hyperthermia, endocrinopathy, and neurologic events. Oral Maxillofac Surg Clin North Am 2013; 25:507-14, vii. [PMID: 23664228 DOI: 10.1016/j.coms.2013.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Despite the impressive safety of office-based anesthesia, serious emergencies still occur. Early and appropriate treatment is likely to improve outcomes. This article discusses selected emergencies with backgrounds and rationale for emergent treatment.
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Affiliation(s)
- Andrew Herlich
- Department of Anesthesiology, University of Pittsburgh School of Medicine, 1400 Locust Street, Suite 2192, Pittsburgh, PA 15219, USA.
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Johnson D, Gegel B, Burgert J, Gasko J, Cromwell C, Jaskowska M, Steward R, Taylor A. The Effects of QuikClot Combat Gauze, Fluid Resuscitation, and Movement on Hemorrhage Control in a Porcine Model. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/927678] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to compare the effectiveness of QuikClot Combat Gauze (QCG) compared to a control group on hemorrhage control; the amount of crystalloid volume infusion on rebleeding; the effect of movement on hemorrhage. This was a prospective, experimental design. Swine were randomly assigned to either the QCG () or the control group (). Investigators transected the femoral artery and vein in each swine. After one minute of uncontrolled hemorrhage, the hemostatic agent, QCG, was placed into the wound followed by standard wound packing. The control group underwent the same procedures but without a hemostatic agent. After five minutes of direct pressure, a standard pressure dressing was applied. After 30 minutes, dressings were removed, and the wound was observed for rebleeding for 5 minutes. If hemostasis occurred, 5 liters of crystalloid was given over 5 minutes, and the wound was observed for rebleeding for 5 additional minutes. If no bleeding occurred, the extremity on the side of the injury was moved. There were significant differences in the amount of hemorrhage (), the amount of fluid administration (), and the number of movements () between the QCG and control.
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Affiliation(s)
- Don Johnson
- US Army Graduate Program in Anesthesia, TX 79920, USA
| | - Brian Gegel
- US Army Graduate Program in Anesthesia, TX 79920, USA
| | - James Burgert
- Brooke Army Medical Center and Northeastern University, 360 Huntington Avenue, Boston, MA 02115-5000, USA
| | - John Gasko
- US Army Graduate Program in Anesthesia, TX 79920, USA
| | | | | | | | - Alexis Taylor
- US Army Graduate Program in Anesthesia, TX 79920, USA
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