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A dual-modality intravascular imaging catheter that helps you identify lipid-core plaques that is at an increased risk of major adverse cardiac events.

See the science behind our IVUS + NIRS technology

The value of NIRS in detecting risk of MACE

Multiple studies have demonstrated that assessment of the coronary artery with the Makoto IVUS+NIRS Intravascular Imaging System is unmatched in its ability to identify the risk of MACE. The results of the landmark LP study provided clinical evidence that intravascular NIRS imaging can accurately identify both vulnerable patients and vulnerable plaques that are at significantly higher risk for subsequent NC-MACE during a 24-month period.

Vulnerable Patient Risk Identified by NIRS
Vulnerable Plaque Risk Identified by NIRS

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How Dualpro NIRS Works

Why NIRS Spectroscopy?

To identify lipids such as cholesterol

Organic molecules have unique spectroscopic signatures that can be used to detect their presence in a mixture of unknown composition. NIRS allows us to distinguish molecules, such as collagen and cholesterol, within the vessel wall and thus identify the presence of LCP.

Where does the Light Propagate?

Through blood, tissue and interstitial spaces

The microscopic mirrors at the tip of the Dualpro™ catheter are designed to deliver near-infrared light to the vessel wall and collect the diffusely reflected light. The light propagates through blood and tissue by scattering and absorption, even in the presence of calcium or stents, to interrogate the plaque for its chemical fingerprint.

How are the Spectra Interpreted?

With the aid of advanced algorithms

Advanced algorithms analyze the returned light and calculate the probability of the presence of a lipid core plaque. Our algorithms have been validated in a large prospective histology study providing you with information you can trust.

200,000 NIRS Spectra

Approximately 1,300 NIRS spectra per millimeter are acquired as the catheter scans the vessel.¹

Analysis of Acquired Data

The acquired NIRS signals are analyzed and each spectrum is assigned a probability score, from 0 to 1, based on the likelihood of the presence of LCP.

Color Based on Probability

All probability scores, low to high, are mapped on a continuous color scale from red to yellow. Scores above 0.6 appear orange to yellow in the chemogram and contribute to the Lipid Core Burden Index (LCBI).

Chemogram Display

The chemogram is automatically generated within seconds, creating a map of the LCP location within the vessel wall. This color-coded map can be interpreted quickly, permitting informed treatment decisions.

Data you can trust:
Nearly 2,500 artery cross-sections were histologically and spectrally analyzed to validate lipid core plaque detection by NIRS. The red and yellow colors on the chemogram help differentiate normal or fibrotic plaque that is presumed to be stable (left) from those that contain lipid core plaques (right).²

¹ In a 150mm scan at
² Detection of lipid core coronary plaques in autopsy specimens with a novel catheter-based near-infrared spectroscopy system, Gardner er al, JACC Cardiovasc Imaging, 2008

Dualpro IVUS+ NIRS Technical Specifications

Physical Parameters

*The Makoto Intravascular Imaging System™ is intended for ultrasound examination of coronary and peripheral intravascular pathology. Intravascular ultrasound imaging is indicated in patients who are candidates for transluminal coronary and peripheral interventional procedures. The System is not indicated for use in the cerebral vessels. See product instructions for full product description, contraindications, warnings, and instructions.

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