LiqMagic Coronary Intravascular Lithotripsy System

The LiqMagic Coronary Intravascular Lithotripsy (IVL) System, developed by Sonosemi Medical, achieved a notable distinction in October 2023 as China’s first domestically developed coronary shockwave treatment system to receive NMPA approval. The device addresses the clinical challenge of severely calcified coronary artery lesions that resist conventional balloon angioplasty and complicate stent deployment.

Product Overview

The LiqMagic system represents Sonosemi Medical’s entry into the intravascular lithotripsy market, a therapeutic category that has gained significant traction globally for treating calcified vascular lesions. Unlike rotational atherectomy or orbital atherectomy that mechanically debulk calcium, IVL technology uses acoustic pressure waves to fracture calcified plaque while preserving the vessel’s internal lining.

The system consists of two primary components: the LiqMagic C14 shockwave coronary balloon catheter and the ISL100 Pro intravascular shockwave therapy device (comprising a console unit and operating handle). This configuration allows operators to control energy delivery through a handheld interface while maintaining standard catheter-based workflow.

Key Features

For calcified coronary artery lesions, Sonosemi Medical’s LiqMagic system delivers 360-degree acoustic pressure waves via the C14 shockwave balloon catheter at low 4 atm inflation pressure, enabling calcium fracture without vessel intima barotrauma.

• 360-Degree Energy Delivery: Multiple miniaturized shock wave generators arranged within the balloon deliver omnidirectional pressure waves to treat circumferential calcification
• Low-Pressure Activation: Shockwave energy is released during low-pressure balloon inflation (typically 4 atm), reducing vessel trauma compared to high-pressure dilatation
• Dual Radiopaque Markers: Proximal and distal markers on the balloon enable precise fluoroscopic positioning at the target lesion
• Pulsed Delivery Mode: Intermittent energy release (approximately 10-second treatment cycles) allows controlled calcium fracture with real-time operator feedback
• Integrated Control Handle: Single-button operation through the handle simplifies the treatment protocol and reduces procedural complexity

Technical Specifications

For coronary calcium fracture before stent placement, the LiqMagic C14 catheter delivers pulsed acoustic waves controlled via the ISL100 Pro console handle, compatible with 6F guide catheters and 0.014-inch guidewires.

Clinical Applications

The LiqMagic system is indicated for preparing severely calcified coronary artery lesions prior to stent implantation. Target clinical scenarios include:

Primary Indications:

• Moderate to severe coronary artery calcification preventing adequate balloon expansion
• Lesions requiring vessel compliance modification before drug-eluting stent placement
• Cases where rotational atherectomy poses elevated risk due to vessel anatomy

Clinical Advantages:

• Effective against both superficial and deep calcium deposits (the 2021 Chinese Expert Consensus on Coronary Calcified Lesions notes IVL as the only technology effective against deep calcification)
• Shorter learning curve compared to rotational atherectomy
• Applicable to challenging anatomies including left main lesions, angulated segments, and eccentric calcification

The company reported that during its first clinical case, a single 10-second shockwave cycle achieved visible opening of a calcified stenosis, with subsequent stent implantation showing optimal expansion without significant residual stenosis.

Regulatory Status

The October 2023 NMPA approval made LiqMagic the first domestically developed coronary IVL system in China, preceding approvals for other domestic manufacturers including Lepu Medical (January 2024). As of early 2025, more than 10 Chinese manufacturers have received NMPA approval for IVL products, though the FDA had approved only one manufacturer (Shockwave Medical, now part of Johnson & Johnson) in the United States.

Clinical Background

Coronary artery calcification represents a significant procedural challenge in interventional cardiology. According to epidemiological data cited in the Chinese Expert Consensus:

• Calcification prevalence reaches approximately 50% in patients aged 40-49 and 80% in those aged 60-69
• Severe calcification accompanies 20-30% of complex coronary interventions
• Risk factors include advanced age, diabetes mellitus, and chronic kidney disease

Traditional approaches including high-pressure balloon inflation, scoring/cutting balloons, and rotational atherectomy each carry limitations. High-pressure techniques may cause dissection; atherectomy devices have learning curves and cannot address deep calcium. The consensus document characterizes IVL technology as a potential “terminator” of coronary calcified lesions due to its unique ability to treat deep calcium safely.

Frequently Asked Questions

How does the LiqMagic system treat calcified lesions?

The LiqMagic balloon catheter contains multiple shock wave generators that produce pulsed acoustic pressure waves when activated. These waves propagate through the fluid-filled balloon and into the calcified plaque, creating micro-fractures in the calcium while the low-pressure balloon inflation protects the vessel intima from barotrauma.

What is the difference between IVL and rotational atherectomy?

Rotational atherectomy uses a high-speed diamond-tipped burr to mechanically abrade calcium from the vessel surface. IVL uses acoustic energy to fracture calcium without tissue removal. IVL can treat deeper calcium deposits, has a shorter learning curve, and may reduce procedural complications, though atherectomy remains useful for heavily calcified lesions requiring luminal debulking.

Is the LiqMagic system available outside China?

As of early 2025, the LiqMagic system has received regulatory approval only in China (NMPA). Sonosemi Medical has indicated plans for international expansion and overseas clinical development, but CE Mark and FDA clearance have not been obtained.