Percutek Tycheseal — Detailed Product Review

The Percutek platform at a glance

Beijing Percutek Therapeutics is a medical device manufacturer focused on the endovascular treatment of aortic disease. Its Tycheseal stent-graft family covers the two core endovascular indications on a single platform: the AAA system for abdominal aortic and aortoiliac aneurysms (EVAR) and the TAA system for thoracic aortic aneurysm and Stanford Type B dissection (TEVAR). The platform has a growing international footprint; in Türkiye it is represented by Korvia Medikal.

• Manufacturer: Beijing Percutek Therapeutics Inc.
• Indication coverage: EVAR (abdominal aorta) and TEVAR (thoracic aorta) in one platform
• Türkiye representation: Korvia Medikal
• Shared design language: soft multifilament polyester graft fabric, optimized stent-spring spacing, hydrophilic-coated delivery systems with tip-capture proximal fixation

What sets Percutek apart: key design advantages

Percutek Tycheseal is positioned as a next-generation, complex anatomy-focused EVAR/TEVAR technology — built upon decades of global experience with EVAR and TEVAR systems and clinical experience from thousands of cases. Rather than offering simply a comparable graft, the platform aims to provide engineering advantages in challenging anatomies where conventional solutions may be limited: short proximal necks, severe angulation, proximal sealing challenges, bird-beak configuration, graft migration, endoleaks and deployment difficulties have all served as design reference points. The features below reflect the manufacturer's design goals and test data.

• Complex-anatomy applicability: designed for short proximal necks (anchoring zone from 10 mm) and severe angulation (suprarenal ≤ 60°, infrarenal ≤ 75°)
• Precision Positioning System: the unique “=” marker at the lower edge of the supporting stent indicates the starting point of the graft fabric, with clear fluoroscopic visibility for accurate proximal anchoring in short, angulated necks
• Waveform proximal sealing: the M-shaped proximal reinforcement is designed to enhance proximal sealing and significantly reduce the risk of Type I endoleak
• Secure sealing in the arch: the dual-segment, multi-peak small-wave proximal design enhances conformity to the aortic wall and helps reduce bird-beak formation
• Superior conformability: the non-connecting-bar design with a variable-height, multi-peak structure enables 360° self-conformability and optimal apposition in challenging anatomies
• 12 mm distal high-angle design: engineered to minimize the risk of D-Sine formation and support conformability in tortuous anatomy
• Advanced graft fabric: seamless, multifilament, double-layer integrated weave with uniform density and an ultra-thin 0.11 mm profile — balancing strength, flexibility and conformability
• Proven mechanical durability: no wire fracture or structural degradation in accelerated fatigue testing over 400 million cardiac cycles, corresponding to roughly 10 years of simulated use
• Controlled deployment: designed to prevent the windsock effect during placement, with repositioning possible until the third stent spring is released
• Comprehensive portfolio: bare-stented and non-bare-stented configurations across a wide size range, addressing a broad variety of clinical scenarios

TAA thoracic system (TEVAR): design review

The thoracic stent graft is designed for the endovascular treatment of diseases of the descending thoracic aorta, including aneurysm and dissection. The design pairs flexibility with controlled radial force, so the graft can follow the curve of the aortic arch region while still sealing in relatively short landing zones.

• Short and long stent springs with optimized spacing for flexibility along the aortic curve
• Soft, seamless multifilament polyester graft fabric
• Proximal and distal stent springs with differentiated radial force
• Dedicated proximal and distal sealing-spring configurations, designed to seal in aortic necks from 10 mm
• Multi-peak proximal and distal stent design, intended to help prevent Type I endoleak and reduce secondary entry tears in dissection
• Connector-free, variable-height stents that self-conform 360° to the vessel wall

TAA delivery system and size portfolio

The delivery system is built for predictable, staged deployment. The proximal end of the graft is held by a tip-capture mechanism, allowing the graft to be repositioned until the third stent arch is released — a meaningful margin of control when landing close to the arch vessels. Straight and tapered configurations cover a wide anatomical range.

• Introduction profile from 18 Fr (configuration-dependent); 830 mm working length
• Sheath catheter with full hydrophilic coating
• Tip-capture proximal fixation; repositionable until the third stent arch is released

AAA abdominal system (EVAR): design review

The abdominal system is a three-part modular stent graft for infrarenal abdominal aortic and aortoiliac aneurysms. Its signature feature is active proximal fixation: a laser-cut proximal spring with anchoring hooks engages the aortic wall above the aneurysm, supporting positional stability in short and angulated necks.

• Three-part modular design (bifurcated main body plus iliac legs) to manage complex aortoiliac anatomy
• Laser-cut proximal spring with hooks for active fixation
• Proximal waveform sealing designed to help reduce Type I endoleak risk
• Optimized stent-spring spacing and soft multifilament polyester fabric
• Anatomical envelope: proximal neck ≥ 10 mm, infrarenal angulation ≤ 75°, proximal aortic diameters 20–32 mm, iliac diameters 8–20 mm

AAA delivery system and modular portfolio

The AAA system is delivered through a low-profile, fully hydrophilic-coated catheter with tip-capture proximal fixation. The modular portfolio — main bodies, iliac legs, aortic extensions and elongation pieces — lets the physician assemble a device matched to each patient's anatomy.

• Low-profile introduction from 16 Fr for the main body (limbs lower); 750 mm working length
• Sheath catheter with hydrophilic coating; tip-capture proximal fixation

Graft material: why multifilament polyester?

Woven polyester is one of the longest-established materials in vascular grafts. Tycheseal uses a soft multifilament polyester weave: the soft fabric conforms to the vessel wall and follows the stent springs without kinking, while the seamless, low-profile construction keeps bulk out of the delivery system. Combined with optimized spring spacing, the fabric is intended to support both flexibility and durable exclusion of the aneurysm sac.

What this review means in practice

Specifications describe a device; outcomes come from matching the device to the right patient with the right plan. Whether a Tycheseal system suits a given anatomy is always the treating physician's decision, based on cross-sectional imaging and the manufacturer's instructions for use. Korvia supports that decision in Türkiye with case planning, device sizing, procedural readiness, on-site clinical support and continuous product availability.