Falcon Pro | Quad

The Industry Standard for Advanced Physiologic Vascular Diagnostics

The Industry Standard for Advanced Physiologic Vascular Diagnostics

Trusted by Vascular Specialists Worldwide

The Falcon PRO and Falcon QUAD represent the next generation of physiologic vascular testing systems, combining powerful diagnostic capabilities with exceptional workflow efficiency. Designed for hospitals, vascular laboratories, vein centers, and specialty clinics, the Falcon platform streamlines ABI, TBI, segmental pressure, PVR, PPG, and Doppler examinations while delivering the reliability and clinical confidence providers depend on every day.

Designed to Meet the Demands of Modern Vascular Care

Built to support both routine vascular screening and comprehensive peripheral vascular assessments, Falcon systems help clinicians perform more studies with less setup time and greater consistency. Whether you choose the advanced capabilities of the flagship Falcon PRO or the efficiency-driven Falcon QUAD, both systems feature intuitive software, customizable protocols, and proven performance that enhance productivity while supporting accurate, repeatable vascular evaluations.

IMIUSA Falcon Pro

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The Falcon Pro records up to ten pulse volume channels and five PPG channels at the same time, so a full bilateral segmental study is captured in one pass instead of segment by segment. Fewer cuff cycles means shorter exams, less patient repositioning, and more studies in a day.

Place the color-coded cuffs, select the ABI protocol, and the system handles the rest. Cuff inflation and saving are automatic, systolic pressures are detected for you, and all sites can be measured at once. A complete ankle-brachial index study takes only a couple of minutes.

An integrated temperature sensor and five PPG channels let you record all five fingers at once, immediately after cold immersion — the moment that matters most in a Raynaud’s study. Nothing is lost while you move a sensor from digit to digit and start over.

Beyond ABI and segmental pressures, the Falcon Pro performs exercise stress testing, venous reflux, MVO/SVC, thoracic outlet syndrome, palmar arch and AV fistula, reactive hyperemia, penile function studies, and extracranial Doppler. One system covers the range of studies a busy vascular lab is asked to perform.

Choose 4 MHz and 8 MHz probes for larger, deeper vessels and the 10 MHz probe for small, shallow peripheral vessels such as the dorsalis pedis. Probes are color coded, deliver full high-resolution spectral analysis, and every study can be replayed with audible Doppler sound.

Studies run start to finish from a single key, with a dedicated remote control and foot switch keeping your hands free at the patient. New technologists get to a reliable, repeatable exam quickly, and your most experienced staff are not slowed down by the software.

Build unlimited user-defined protocols and design your own report layout with the built-in report builder. Add your logo and facility details, save time with preconfigured interpretation templates, and use side-to-side and segment-to-segment comparison charts to present findings clearly to the referring physician.

The Falcon Pro supports DICOM, HL7, GDT, and SQL, with a range of export formats and unlimited review workstations. Results move from the exam room into your record system without re-keying, and physicians can review and post-edit studies from wherever they work.

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IMIUSA Falcon Quad

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The Falcon Quad captures four pulse volume channels and four PPG channels simultaneously — everything a standard bilateral segmental or ABI study requires, in a system sized and priced for practices that do not need the Pro’s ten-channel capacity.

Cuffs inflate automatically, systolic pressures are detected automatically, and multiple sites are measured at the same time. Studies can be run with either Doppler or PPG sensors, and quality control on every blood pressure measurement helps keep results consistent across your staff.

The Quad includes the same integrated temperature sensor and PPG digit sensors used for Raynaud’s syndrome diagnosis. Waveforms and pressures are recorded from multiple digits simultaneously, so cold immersion testing is captured while the response is still there to measure.

Exercise stress testing, venous reflux, MVO/SVC, thoracic outlet syndrome, and the palmar arch test all come standard — not as paid add-ons. A smaller channel count does not mean a smaller test menu, so your diagnostic range grows as your practice does.

The Quad runs the full Falcon software: unlimited user-defined protocols, one key operation, the report builder with your own layout and logo, interpretation templates, and comparison charts. Staff trained on one Falcon system can walk up to any other and work immediately.

With DICOM, HL7, GDT, and SQL support plus unlimited review workstations, the Quad fits the same clinical workflow as the Pro. Studies reach your record system automatically and are available for physician review and post-editing from anywhere on your network.
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Compare Models

Use our comparison chart to find the Falcon system best suited to your needs.

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Falcon Enhanced Features

Segmental Blood Pressures

Perform comprehensive vascular assessments with up to 10 color-coded pressure channels for lower extremity testing, or 4 channels with the Falcon Quad, along with simultaneous PVR measurements and support for a wide range of Doppler probes and PPG sensors. Advanced post-processing tools and stress testing capabilities help clinicians achieve accurate and efficient vascular diagnoses.

ABI & TBI Measurement

Fast and accurate Ankle-Brachial Index (ABI) and Toe-Brachial Index (TBI) measurements can be performed using either Doppler or PPG technology. All measurements are automatically saved and transferred directly to an interactive summary screen, helping to streamline workflow and improve reporting efficiency.

Doppler Probes

The system includes standard 4 MHz and 8 MHz Doppler probes, as well as a unique 10 MHz probe designed specifically for evaluating small peripheral vessels. High-resolution Doppler spectral analysis is supported through dedicated vascular software and advanced processing algorithms, providing reliable diagnostic information.

PPG Sensors

The system features five independent PPG ports for simultaneous finger and toe measurements and includes an integrated temperature sensor (useful for Raynaud’s diagnosis). Finger clip and toe clip sensors are provided for routine examinations, while disc sensors with adhesive stickers are available for venous reflux testing.

Proven Durability and Reliability

Built around 10 independent pressure channels utilizing IPU technology and five dedicated PPG ports, the system is engineered for long-term reliability. High-quality Doppler probes help minimize downtime, and the platform has been successfully deployed worldwide for more than a decade with an exceptionally low failure rate.

Seamless Network Connectivity

The platform offers true plug-and-play installation and supports automated DICOM Worklist and Storage, Structured Reporting, and HL7 integration. Unlimited review stations allow clinicians to remotely analyze and interpret studies, while remote final reporting capabilities support efficient collaboration across multiple locations.

Optimized Clinical Workflow

Dedicated examination protocols can be configured to meet specific clinical requirements, and an intuitive protocol builder makes it easy to create, modify, and standardize testing procedures across departments.

Ease of Use

A large touch-screen interface and intuitive software design help reduce the learning curve for new users. Additional convenience is provided through wired and wireless remote controls, as well as optional footswitch operation.

Dedicated Specialty Testing

The system supports a wide range of specialty studies, including Thoracic Outlet Syndrome (TOS), Raynaud’s Phenomenon, Penile Function and Erectile Dysfunction testing, Allen’s Test (Palmar Arch Test), Venous Reflux, Venous Capacitance and Outflow evaluations, and Pulse Wave Velocity assessments.

Comprehensive Reporting

A customizable report builder allows facilities to create reports tailored to their specific needs. Organizations can incorporate their own branding and logos, while preconfigured interpretation templates help improve consistency and reporting efficiency.

Research and Data Analysis Tools

Integrated research features include built-in statistical analysis tools, on-screen graphing capabilities, and segment filtering functions. Data can be exported in multiple formats, including PDF, Excel, Word, JPEG, VSX, and video clips, making it easy to share and analyze results.

Dedicated Customer Support

Customers benefit from local representatives located throughout the United States, access to multiple Registered Vascular Technologists (RVTs) on staff, and rapid service support through a complete inventory of parts and accessories maintained in Buffalo, New York.

Falcon Applications for Vascular Diagnosis

Imagine what you would like to have in your ideal PVD system and discover it in the FALCON!

ABI, the Ankle Brachial Index, is the most popular application for fast and simple screening of a physiological vascular pathology. With this test pressure cuffs are placed on the 2 ankles and on 1 or 2 brachial segments.

The IMUSA FALCON/Pro allows to perform the ABI test with either Doppler or PPG sensors. In addition, the Falcon allows to perform simultaneous measurements in all sites under certain conditions for rapid measurements.

Prior to segmental cuff inflation, a reference signal is identified distal to the cuff location. When the cuff pressure exceeds the systolic pressure, the reference signal waveforms should disappear. Then, the cuff pressure is slowly deflated at constant bleeding rate, and the first occurrence of the return of the reference signal waveform marks the systolic pressure.

The ABI is defined as the ratio of the higher brachial pressure to each of the ankle pressures. A ratio of around 1 is considered normal, while lower values indicate various levels of significant peripheral arterial disease (PAD) according to international guidelines.

IMUSA Falcon PVD Clinical Applications – Ankle Brachial Index

Above is an example of a ABI test performed on a patient using IMUSA FALCON/Pro. The sensor used in this case is 8 MHz Doppler probe.

The Segmental Blood Pressure (SBP) tests require the placement of dedicated pressure cuffs on the various limb segments, which typically include the 2 brachial segments, the thighs (some protocols divide the thigh into 2 separate segments), the segment below the knees, the ankles and the toes.

Additional segments can be measured, such as the digits for diagnosis of the Raynaud’s Syndrome.

IMUSA Falcon PVD – Segmental Blood Pressures

Prior to segmental cuff inflation, a reference signal is identified distal to the cuff location. This reference signal is typically a CW Doppler measurement or a PPG (Photo-Plethysmograph, used for the digits and toes).

Above is an example of a SBP measurement taken from IMUSA FALCON/Pro system using 8 MHz CW Doppler probe.

When the cuff pressure exceeds the systolic pressure, the reference signal waveforms should disappear. Then, the cuff pressure is slowly deflated at constant bleeding rate, and the first occurrence of the return of the reference signal waveform marks the systolic pressure.

The clinician is normally interested in the ratio of the ankle systolic pressure to the brachial pressure (ABI – Ankle Brachial Index), or in significant pressure differences either in sequential segments or side-to-side differences for the same segment.

Peripheral vascular Doppler measurements are normally performed using CW (Continuous Wave) Doppler probes.

Different Probe frequencies are used depending on the target vessels: 4 or 8 MHz are used for larger and deeper vessels such as the Carotid, Femoral or Popliteal arteries, and higher 8 or 10 MHz are used for the smaller and shallower vessels such as the Dorsalis Pedis or Tibial arteries.

The main objective is to qualitatively examine the waveform shapes: a normal peripheral artery (not in the carotids) will show 3 phases during a cardiac cycle, a prominent early systolic forward flow, a late systolic reverse flow, followed by a small component of forward flow again. This signifies a healthy elastic artery. As the vessel becomes less elastic (for example due to diabetes), the third and/or second phase will disappear.

In addition, significantly high velocities may indicate the presence of a stenosis or some other obstruction to the blood flow.

The Pulse Volume Recording (PVR) test is a pneumo-plethysmographic test used for detection of the segmental volume changes in the limb which result from the flowing blood, as a function of the cardiac cycle.

Similar to the Segmental Blood Pressure (SBP) measurements, dedicated pressure cuffs are placed around all limb segments prior to initiating the test.

The cuffs are then inflated to a pressure that would occlude the venous return, yet will maintain the arterial flow un-obstructed. This pressure is typically 65 mmHg.

Once the cuff pressure is stabilized, the waveform signals which reflect the segmental volume changes can be recorded. The clinicians are normally interested in the qualitative shape of the waveforms: a “normal” PVR consists of a rapid systolic upstroke and a rapid downstroke with a prominent dicrotic notch.

With increasing arterial disease the PVR waveform becomes attenuated, the upstrokes and downstrokes are less prominent and the PVR amplitude decreases and ultimately becomes flat.

The Venous Reflux test is used to determine the competence of the superficial venous valves in the calves of the legs. This test is performed with a DC PPG sensor.

When performing Venous Reflux test, the patient is requested to sit upright with the legs not touching the ground. A Photo-plethysmograph (PPG) sensor is attached to the leg above the ankle in the region of the posterior tibial artery. When the DC signal reaches a steady state baseline, the patient is requested to perform multiple leg dorsiflexions which result in “pumping” of all of the venous blood. After the dorsiflexions the patient is requested to remain still, while the PPG DC signal returns back to the initial baseline.

Optionally, the test can be repeated with a cuff wrapped around a segment on the leg (thigh, above/below knee) acting as a tourniquet.

The duration from the end of the dorsiflexions (maximal signal change) until the signal return to baseline (VRT, Venous Recovery Time) indicates the status of the valves. A slow recovery time indicates competent valves, while a fast VRT would indicate a suspicion of valvular incompetency.

The Photo-plethysmograph (PPG) test detects changes in segmental blood volume, in a similar manner to the Pulse Volume Recording (PVR) test. The PPG technology, however, is different than the pressure-sensor based PVR technology.

With PPG, infra-red signals are transmitted to the skin and reflected back to the sensor, therefore PPG waveforms reflect local and rather shallow skin variations in blood flow.

Typical PPG measurement sites are the toes and digits, and interpretation of the signals is in a similar manner to the interpretation of the PVR waveforms.

In order to differentiate different vascular disorders, or to determine the functional severity of a stenosis, some of the tests described above are repeated after induced stress.

Typically, the patient will be requested to perform treadmill or similar activity, under the supervision of the examiner.

Most of the time the stress testing will include Segmental Blood Pressures, particularly at the ankles and brachials, and sometimes also Pulse Volume Recording (PVR) and CW Doppler measurements.

Segmental pressures are often measured at different post-stress times to determine also the recovery time from the stress effects. The clinician is particularly interested in identifying significant variants from the resting pressure indices and specifically changes in the Ankle-to-Brachial Index (ABI).

On the left side is an example of a Segmental Blood Pressure measurement with induced stress (exercise in this case) performed using IMUSA FALCON Pro. The table shows blood pressure measurements in pre-exercise and post-exercise conditions. It is common to take multiple measurements (cycles) in timed intervals after performing the induced stress. The stress graph on the left side shows the recovery of each measured segment starting with pre-stress conditions until the last post-stress cycle.

The Thoracic Outlet Syndrome test is conducted in order to determine the vascular role when the patient’s symptoms are indicative of perfusion loss or neurogenic causes.

This procedure tests for intermittent perfusion loss, particularly in the arms and hands.

Either Doppler, PVR or PPG sensors detect normal resting waveforms in the digits or hands and then the patient is instructed through a sequence of positions such as: Hands-up Test, Adson or Scalene Maneuver, Costoclavicular Maneuver, Allen Test, and Provocative Elevation Test.

The clinician tries to identify a position which significantly reduces perfusion to determine whether the symptoms originate from vascular causes.

Raynaud’s disease is a rare disorder of the blood vessels, usually in the fingers and toes. It causes the blood vessels to narrow when you are cold or feeling stressed.

When this happens, blood can’t get to the surface of the skin and the affected areas turn white and blue. When the blood flow returns, the skin turns red and throbs or tingles. In severe cases, loss of blood flow can cause sores or tissue death.

Primary Raynaud’s happens on its own. The cause is not known. There is also secondary Raynaud’s, which is caused by injuries, other diseases, or certain medicines.

The test is typically performed with PPG sensors attached to fingers as well as pressure cuffs in some cases for blood pressure measurement of each finger. PPG pulse is taken simultaneously from each finger at rest and after cold immersion.

An immediate measurement after cold immersion is critical so that the effect of the cold immersion is not lost. Therefore, a system such as the IMUSA FALCON Pro is recommended for Raynaud’s Syndrome test due to its ability to measure all 5 fingers simultaneously, immediately after cold immersion.

The patient lies in a supine position with the legs slightly elevated. A venous occluding cuff is placed on the thigh and a Pulse Volume Recording (PVR) pressure cuff is placed on the calve.

Initially, the cuff acting as a sensor is measured and a baseline is determined. Then the thigh cuff is inflated to occlude the venous return (around 60 mmHg) and the changes in the sensor signal are recorded. Once a plateau is reached, the occluding cuff is rapidly deflated. The sensor signal also quickly returns back to the initial baseline. The clinician then determines MVO and SVC based on the sensor signal to determine venous functionality.

The Reactive Hyperemia test is allowed only in certain countries.

Stress testing is frequently used in peripheral vascular diagnosis to differentiate between different vascular disorders, or to determine the functional severity of an arterial stenosis. Systolic pressures are measured before and after inducing vascular stress. While typically the patient is asked to perform a physical exercise such as exercise on a treadmill, sometimes the patients have difficulties in performing exercise.

In special cases, the reactive hyperemia test (RH) can replace the standard exercise tests and induce vascular stress. RH requires to inflate a pressure cuff in order to occlude the blood flow to the limb or segment of interest for up to several minutes, and then rapidly releasing the cuff pressure in order to generate the hyperemic effect.

It is crucial that a professional examiner will be present near the patient at all time, and immediately deflate the pressure cuffs when necessary.

Penile function or impotence test is used for determination of whether penile function disorders are of vascular nature.

The IMUSA FALCON Pro allows to use a variety of tests, including the simultaneous combination of different tests. Such tests include Doppler arterial measurements in the penile vessels, blood pressure measurements with a penile pressure cuff, and PVR or PPG waveform measurements.

The results of such tests can either identify a penile vascular problem, or eliminate vascular issues as the cause of impotence.

The Palmar Arch Test (PAT), also known as Allen’s Test, is used to assess collateral blood flow to the hand before harvesting the radial or ulnar artery. The test involves placing PPG sensors on two or more fingers, recording baseline waveforms, then observing changes during and after manual artery compression. A significant drop in blood flow suggests inadequate collateral circulation, indicating the artery should not be harvested. The Falcon system enhances this process by allowing multi-digit monitoring, automated markers, and visual waveform analysis.

Extracranial examination is performed with Doppler measurements in the carotid and other extracranial vessels. These measurements focus on the measurement of peak and mean blood flow velocities in order to identify a vascular obstruction to flow, such as an arterial stenosis.

The common blood vessels during extracranial evaluation are the common, internal and external carotid arteries, as well as the subclavian artery. A measurement at the location of a stenosis will result in increased blood flow velocities.

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