PerQseal® Elite Venous Clinical Study (ELITE-Venous)

This study is a prospective, multicentre, single-arm study to investigate the safety and efficacy of the PerQseal Elite in up to 97 patients at up to 12 European investigational sites. The study shall not be blinded prior to, during or post the procedure. Patients undergoing a percutaneous catheter-based venous interventional procedure (e.g., mitral valve repair, leadless pacemaker implantation, circulatory assist or ECMO via large bore femoral vein catheter) requiring a venotomy created by 14 to 22F sheaths (venotomies up to 26F), via the common femoral vein will be screened against the study inclusion/exclusion criteria.

All subjects shall have a 30-minute, 60-minute, pre-discharge (~48 hours), 30-Days ± 7-Days and 180-Days ± 30-Days follow-up assessments.

All safety data from the study will be assessed by the Data Safety Monitoring Committee on a continuous basis.

Inclusion criteria

• Age ≥ 19 years.
• Clinically indicated for a percutaneous venous interventional catheter-based procedure, e.g., mitral valve edge to edge repair, left atrial appendage device closure, leadless pacemaker implantation, patent foramen ovale closure or use of a circulatory assist device or extracorporeal oxygenation using a common femoral venotomy created by a 14 to 22F sheath (venotomy up to 26F).
• Subject is willing and able to provide appropriate study-specific informed consent, follow protocol procedures, and comply with follow-up visit requirements.
• Females who are not pregnant or lactating and not planning to become pregnant for the duration of the study.

Baseline Exclusion Criteria:

• Evidence of current systemic bacterial or cutaneous infection, including groin infection,
• Known bleeding diathesis, unstable INR, definite or potential coagulopathy, platelet count < 100,000/μl or subjects on long term anticoagulants with an INR > 2.2 within 12 hours prior to index procedure,
• Significant anaemia (example: haemoglobin < 8 g/dL or haematocrit < 22%), within 24 hours prior to index procedure,
• Known type II heparin-induced thrombocytopenia,
• Documented right ventricular dysfunction < 13%,
• Ipsilateral or contralateral lower extremity amputation,
• Previous groin surgery within the region of the ipsilateral vessel access,
• Common femoral vein diameter stenosis > 50% or previous bypass surgery/stent placement in the common femoral vein of target leg,
• Known existing nerve damage in the target leg,
• Nephrotic syndrome or renal insufficiency (Glomerular Filtration Rate ≤ 30 ml/min or baseline serum creatinine > 2.5 mg/dl) or on renal replacement therapy or albumin level < 3.5 g/dl or symptoms of pitting oedema,
• Systolic pulmonary artery pressure > 60 mmHg
• Known allergy to any of the materials used in the PerQseal Elite device (refer to Investigator's Brochure),
• Subject is unsuitable for surgical repair of the target leg access site,
• Subject has undergone a percutaneous procedure greater than 8F sheath in the target vessel, within the 90-days prior to index procedure,
• Subject has undergone a percutaneous procedure of 8F sheath or less using an absorbable intravascular closure device for haemostasis, in the target vessel, within the 90-days prior to index procedure,
• Subject has undergone a percutaneous procedure of 8F sheath or less using a suture mediated closure device or manual/mechanical pressure for haemostasis in the target vessel, within the 30-days prior to index procedure,
• History of DVT or pulmonary embolism or venous thrombotic event,
• Splenectomy or suffering psoriasis or paraesthesia of the ipsilateral leg,
• Further planned endovascular/catheter-based procedure in the target leg in the 30-days following the index procedure,
• Subject is enrolled in another investigational medical device or drug study,
• Subject has been previously enrolled in this clinical study,
• Subject is unable to maintain ipsilateral leg still during the index procedure (restless leg syndrome),
• Current COVID-19 infection (with or without symptoms), recent positive test for COVID-19 within two weeks, or recent exposure to a person with COVID-19 infection within two weeks.

Procedural Exclusion Criteria:

• Anatomically the common femoral vein is substantially posterior to the femoral artery, confirmed by Duplex ultrasound,
• Initial common femoral venous access achieved other than with the use of an ultrasound guided access approach,
• If the venous access is, or suspected of being, via an artery,
• Difficult dilation during initial target femoral vein access (e.g., that damages or kinks dilators) while step-dilating up to the large-bore device,
• During venous puncture, the target femoral vein suspected to have experienced a posterior venous wall needle puncture or underwent > one needle puncture during the primary procedure, with a needle larger than a micropuncture needle (> 21 gauge or > 0.819 mm diameter). (Note: not an exclusion if micropuncture technique under ultrasound guidance used for femoral vein access [Ref. 30, 31]),
• Subject has a tissue tract (i.e., estimated distance from skin entry point to venous anterior surface at venotomy) expected to be greater than 8 cm,
• Significant blood loss requiring transfusion of blood products during primary procedure or within 30-days prior to index procedure,
• Activated clotting time (ACT) > 250 seconds immediately prior to sheath removal or if ACT measurements are expected to be > 250 seconds for more than 24 hours after index procedure,
• Target puncture site is in a vascular graft,
• Target venotomy greater than 26F,
• Target femoral vein diameter is less than 7 mm, based on Duplex ultrasound or angiography,
• Evidence of venous diameter stenosis > 20% within 15 mm proximal or distal to venotomy site based on Duplex ultrasound or angiography,
• Target venotomy has been made in the superficial femoral vein, profunda femoris vein (deep femoral vein), great saphenous vein or located less than 15 mm distal (cranial) to the bifurcation of either the profunda femoris or great saphenous vein and common femoral vein,
• Target venotomy located behind (posterior) or above (cranial) to the inguinal ligament based upon bony landmarks (above femoral head on A-P projection),
• Subjects with an acute haematoma > 4 cm diameter, arteriovenous fistula, pseudoaneurysm or intraluminal thrombosis at the target access site identified intra-procedurally,
• Evidence of bleeding around the primary procedure sheath (VARC type 1/BARC type 2 or higher),
• Intra-procedural (angiographic or Duplex ultrasound) evidence of venous laceration, dissection or stenosis within the femoral vein that would preclude use of the PerQseal Elite device,