Use of Bemiparine as a Prophylactic Antithrombotic Agent, in Patients Undergoing Microsurgery for Head and Neck Reconstruction

Study Overview
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Brief Summary
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A comparative study to reveal if the use of Bemiparine (Hibor) versus Enoxaparin (Clexane) as an antithrombotic agent, shows an advantage on the rate of thrombotic and haemorrhagic events in microsurgicals free flaps during head and neck reconstruction.

Detailed Description
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This is an observational post-authorization study on a group of patients undergoing microsurgery on the Oral and Maxillofacial Surgery and Plastic and Reconstructive Surgery Service at Ramon y Cajal Hospital, Madrid for processes that require reconstruction with a flap microvascular. A group of 67 patients treated according protocol postoperative prevention of deep vein thrombosis with Bemiparina will be compared with data collected retrospectively from a group of 134 patients treated previously with an earlier protocol with enoxaparin as main antithrombotic agent.

Official Title
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Use of Bemiparine as a Prophylactic Antitrombotic Agent, in Patients Undergoing Microsurgery for Head and Neck Reconstruction

Conditions
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Patients Undergoing Microvascular Surgery

Intervention / Treatment
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* Drug: Bemiparine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients that will undergo reconstructive surgery for defects in any part of the body, especially in head and neck, after cancer, traumatic or infectious pathology, which will require the use of techniques of microsurgery. Patients who have given their informed consent Patients in which it has been decided to use thromboprophylaxis with bemiparina before proposing them to participate in the study. Exclusion Criteria: Patients not eligible for repair through the use of free flaps, and therefore the use of Microsurgical techniques for vascular anastomosis Patients with an underlying pathology that may interfere to a clinically significant or contraindicated the use of Bemiparina, such as: serious hepatic or renal insufficiency, uncontrolled arterial hypertension, history of gastroduodenal, thrombocytopenia, nephrolithiasis or uretrolitiasis and vascular disease ulcer of choroid and retina. Refusal of the patient or their family members to participate in the study. Pregnancy and breastfeeding Known hypersensitivity to study drugs or any of its components
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Retrospective control<br>Patients who had received enoxaparine as antithrombotic according to a protocol for prevention of postoperative deep venous thrombosis | |
| Prospective Cohort<br>Patients who will receive bemiparine 3500 UI as antithrombotic according to a protocol for prevention of postoperative deep venous thrombosis | Drug: Bemiparine<br>* Bemiparine 3500 UI as antithrombotic according to a protocol for prevention of postoperative deep venous thrombosis<br>* Other names: Hibor (3500UI/0,2ml);|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To compare the use of Bemiparine, against Clexane as an antithrombotic agent | Incidence thrombotic complications and bleeding | 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of deep vein thrombosis and pulmonary embolism |  | 24 months | 
| Incidence of postsurgery hemorrhagic strokes with both drugs |  | 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Bemiparine, Antithrombotic microsurgery protocol, Comparative study, Anticoagulant microsurgery protocol