The following are multiple choice questions (with answers) about medical knowledge.   A possible role for fondaparinux as a bridging agent in the perioperative setting is explored. Anticoagulation guidelines provide minimal direction on the perioperative use of fondaparinux. Fondaparinux's extended half-life of 17-21 hours complicates its use as a perioperative bridging therapy. The ideal time for discontinuation before surgery is an issue, particularly in surgeries with a high bleeding risk or in which neuraxial anesthesia is used. Guidance for perioperative bridging with fondaparinux must be derived from pharmacokinetic data, surgical prophylaxis trials, case reports, and anesthesia guidelines. Published trials used fondaparinux sodium 2.5 mg daily for venous thromboembolism prophylaxis in surgical patients, and the majority avoided its use before surgery in patients receiving neuraxial anesthesia. Three case reports cited the use of fondaparinux sodium as perioperative bridge therapy; one used a 2.5-mg dose, and the other two used a full treatment dose of 7.5 mg. Furthermore, professional anesthesia guidelines conflict in their recommendations regarding the timing of drug administration with neuraxial catheter use. For these reasons, it may be optimal to avoid fondaparinux use before surgery. In some instances, the use of low-molecular-weight heparin or inpatient use of i.v. unfractionated heparin is not possible, is contraindicated, or has limited efficacy, such as a patient with history of heparin-induced thrombocytopenia or antithrombin III deficiency. Fondaparinux may have a role in bridge therapy for these patients.   **Question:** Is there a role for fondaparinux in perioperative bridging?   (A) Yes   (B) No   (C) Maybe
['(B) No <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Yes \n (B) No \n (C) Maybe <> possible answers', "A possible role for fondaparinux as a bridging agent in the perioperative setting is explored. Anticoagulation guidelines provide minimal direction on the perioperative use of fondaparinux. Fondaparinux's extended half-life of 17-21 hours complicates its use as a perioperative bridging therapy. The ideal time for discontinuation before surgery is an issue, particularly in surgeries with a high bleeding risk or in which neuraxial anesthesia is used. Guidance for perioperative bridging with fondaparinux must be derived from pharmacokinetic data, surgical prophylaxis trials, case reports, and anesthesia guidelines. Published trials used fondaparinux sodium 2.5 mg daily for venous thromboembolism prophylaxis in surgical patients, and the majority avoided its use before surgery in patients receiving neuraxial anesthesia. Three case reports cited the use of fondaparinux sodium as perioperative bridge therapy; one used a 2.5-mg dose, and the other two used a full treatment dose of 7.5 mg. Furthermore, professional anesthesia guidelines conflict in their recommendations regarding the timing of drug administration with neuraxial catheter use. For these reasons, it may be optimal to avoid fondaparinux use before surgery. In some instances, the use of low-molecular-weight heparin or inpatient use of i.v. unfractionated heparin is not possible, is contraindicated, or has limited efficacy, such as a patient with history of heparin-induced thrombocytopenia or antithrombin III deficiency. Fondaparinux may have a role in bridge therapy for these patients. \n   Is there a role for fondaparinux in perioperative bridging? <> context@"]