Last updated on December 2016

The Safety and Efficacy of an Extravascular Water-Soluble Sealant for Venous Access-Site Closure


Brief description of study

Evaluate the safety of the MynxGrip™ extravascular sealant for common femoral vein closure following both diagnostic and interventional procedures as assessed by clinical and imaging criteria.

Detailed Study Description

The objective of this study is to evaluate the safety of the MynxGrip™ extravascular sealant for common femoral vein closure following both diagnostic and interventional procedures as assessed by clinical and imaging criteria for venous thrombosis at the site of closure device deployment. This is a single-center prospective study of patients who are undergoing either diagnostic or interventional procedures. A total of 208 patients will be enrolled in this study and will be followed through hospital discharge for safety purposes. The primary safety endpoint will include both deep venous thrombotic and bleeding/vascular injury related complications prior to discharge. Outcomes will be assessed via clinical evaluation and imaging with clinically indicated as follow: Assessment of venous thrombosis i. Clinical: Physical exam findings consistent with venous thrombotic/thromboembolic related complication: - Redness or swelling at the venous puncture site - Increased lower extremity edema - Calf pain - New onset or worsening shortness of breath - New onset of pleuritic chest pain ii. and if clinically indicated, imaging: venous Doppler ultrasound assessment of obstructive or non-obstructive deep vein thrombosis (DVT) - Bleeding or vascular related complications i. Damage to the vessel requiring surgical repair ii. Access site bleeding requiring the need for transfusion iii. Nerve injury at access site iv. Generalized infection (septicemia with typical signs, symptoms and positive blood cultures shortly after the index procedure, and requiring treatment with intravenous (IV) antibiotics)Pseudo-aneurysms requiring invasive treatment - Device/procedure failure Device failure is defined as either the inability to deploy the device or device deployment with inadequate hemostasis requiring conversion to immediate manual pressure, or the eventual need for alternative methods to obtain hemostasis. Efficacy will be assessed by time to hemostasis; Time to hemostasis is defined as the time from advancer tube removal (i.e., device removal) to the time when hemostasis was first observed. The study will be conducted following either diagnostic or interventional procedures where venous access was required (via the common femoral vein with insertion of 5, 6, or 7F sheath). Femoral vein hemostasis will be achieved with either manual compression or the MynxGrip VCD system. To assess the primary safety outcome of venous patency and lack of occurrence of DVT, clinical assessment will be performed by the study team vascular access assessment group and when clinically indicated a duplex ultrasound will be performed on patients prior to discharge to evaluation the presence of venous thrombosis. After enrollment, subjects will be randomized 1:1 to: - Treatment Group A: Subjects will have venous hemostasis achieved using the MynxGrip vascular closure system in the common femoral vein. - Treatment Group B: Subjects will have venous hemostasis achieved using manual compression over the common femoral vein. Subjects who meet all inclusion criteria and none of the exclusion criteria, who agree to participate in this clinical study, and who sign an informed consent will be enrolled. The patient will undergo the clinically indicated procedure(s) as per standard of care. The type of procedure(s) performed will be collected within the CRF. Once all the clinically indicated procedures have been completed the following assessment will be made with respect to the inclusion criteria: - Target vein had a maximal sheath size inserted larger that 7Fr - Multiple (>1) attempts at venous access were attempted in the target vein - Patient has intra-procedural bleeding around the access site prior to sheath removal - Critically ill patients requiring intravenous vasopressors for blood pressure stabilization - Ipsilateral femoral artery puncture or sheath insertion - Glycoprotein IIb/IIIIa use - Any bleeding or vascular access-site complication evident pre-venous closure If any of the above are met, then the patient will be considered a screen failure. If one femoral vein was attempted with one or more access attempts with or without sheath insertion and then the contralateral femoral vein is used to gain venous access, the target vein for closure would become the vein with one attempt to achieve access that also fits the inclusion/ exclusion criteria above. Randomization and Enrollment Once the patient meets all the inclusion criteria and none of the exclusion criteria he/she will be considered enrolled in the study. Randomization will be performed in a block size of 4 within site to maintain the 1:1 randomization throughout the trial within two patients. Randomization will be assigned in consecutive order for the patient enrollment ID starting with 001 through 208. The randomization assignment will be stored within an opaque envelope and assigned/opened in numerical order. Study Devices/ Procedures For the randomization assignments both commercial product will be uses. Please follow the commercial IFU for deployment and/or positioning of the Mynx Vascular Closure. For manual compression please follow the local institutions standard of care for the procedure. Follow-up Patients will be followed up though hospital discharge to assess the primary safety outcome of deep vein thrombotic and/or bleeding/vascular injury related complications related to the target venous closure site. To assess this primary safety outcome of venous patency and lack of occurrence of DVT, a clinical assessment this includes the following by systematic physician assessment of the target groin. Once the patient is placed in the recovery room following the completion of the procedure, a member of the Mynx Grip study team will be called to assess the groin, which includes the information below; Assessment of Venous Thrombosis: - Comparing mid calf and mid thigh measurement prior to and post procedure. - Redness or selling at the venous puncture site - Physical exam findings consistent with venous thrombotic/thromboembolic related complications (i.e. vein engorgement, presence of chord, syenosis) - Increased lower extremity edema - New onset or worsening shortness of breath - New onset of pleuritic chest pain Bleeding or Vascular Related complications: - Damage to the vessel requiring surgical repair - Access site bleeding requiring the need for transfusion - Nerve injury at the access site - Generalized infection - Pseudo-aneurysms requiring invasive treatment In the event that the Mynx Grip study team believes that further assessment for venous thrombosis of the target femoral vein is necessary, a duplex ultrasound of the target femoral vein will be ordered. Presence of a venous thrombosis of the target vein will be assessed based on a combination of clinical symptoms and/or result of the duplex ultrasounds. Duplex ultrasounds will be submitted to and assessed by the Duplex Ultrasound Core Lab for a systematic and objective review of the presence of venous thrombosis

Clinical Study Identifier: NCT02438475

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