VENOSCREEN 
The system is for venous and arterial vascular diagnosis and based on the method of Photo-Plethysmograpy (PPG) whereby in case of the examination of veins the method is called Light-Reflection Rheography (LRR) / D-PPG.
The device is USB powered and can be used only together with an external computer on which the Windows software Cardio-Vascular-Lab is installed.
The essential features of the system are:
- Simultaneous measurement on both legs for fast diagnosis and side comparison
- Self-calibrating system to adapt the sensors to the skin and to allow also measurements through medical stockings
- Automated computer controlled measuring procedure with acoustic and visual support during exercise test
- Computer assisted evaluation and classification of measuring results
- Patient data base and capability for off-line data analysis
- Data export capability
The device can be delivered also with PPG sensors for pulse wave analysis in fingers and toes to diagnose peripheral arterial circulatory disturbances.
Measuring Method
Skin is illuminated by invisible infrared light. Blood absorbs this light significantly more than other tissue. Therefore, reflected light, measured by the sensor directly corresponds to the blood content in the examined skin area.
In light-reflection-rheography (LRR) changes in venous blood in vessels of the skin is analysed, which directly depends on the venous blood pressure in the larger vessels of the extremity.
At the beginning of the test, the muscle pump empties the veins (Tip-Toe-Test). This process and the following refilling phase are recorded and analysed and allow the diagnosis of venous insufficiencies as well as providing information about the efficiency of the muscle pump.
Device Configuration
Venoscreen is USB driven and is for use with a computer on which a windows soft-ware is is installed. The Venoscreen software controls the measurement process, automatically evaluates the results and includes a patient data base.
VENOSCREEN PLUS
The device is for venous diagnosis and based on the method of Light-Reflection Rheography (LRR) / D-PPG.
The system is designed as a stand-alone device and consists of a measuring unit including a thermal printer to print out examination protocols and a mobile colour display with touch screen to operate the measuring device and to display the measuring process and the examination results.
The unit is optimized for mobile use, extremely easy to operate and, therefore, very suitable for screening tests on varicose veins in pharmacies.
The essential features of the system are:
- Simultaneous measurement on both legs for fast diagnosis and side comparison
- Self-calibrating system to adapt the sensors to the skin and to allow also measurements through medical stockings
- Automated computer controlled measuring procedure with acoustic and visual support during exercise test
- Computer assisted evaluation and classification of measuring results
- Data base of examination results
- Protocols can be printed on thermal printer
Measuring Method
Skin is illuminated by invisible infrared light. Blood absorbs this light significantly more than other tissue. Therefore, reflected light, measured by the sensor directly corresponds to the blood content in the examined skin area.
In light-reflection-rheography (LRR) changes in venous blood in vessels of the skin is analysed, which directly depends on the venous blood pressure in the larger vessels of the extremity.
At the beginning of the test, the muscle pump empties the veins (Tip-Toe-Test). This process and the following refilling phase are recorded and analysed and allow the diagnosis of venous insufficiencies as well as providing information about the efficiency of the muscle pump.
Device Configuration
VenoScreen Plus is a ready-to-use device and consists of the measuring unit with integrated thermo printer and a mobile colour display with touch screen to operate the measuring device and to display the measuring process and the examination results. The device can be operated intuitively and easily.
VASOSCREEN PRODUCT LINE
VASOSCREEN 2000
This device is for arterial vascular diagnosis and allows a simultaneous 4-channel blood pressure measurement on arms and ankles (oscillometric method) on the basis of which the Ankle-Brachial Index (ABI) is calculated. This new approach is a very good alternative to the previously used Doppler-assisted method.
The unit can be used only together with an external computer on which the Windows software Cardio-Vascular-Lab is installed. The advantages in contrast to Doppler-assisted ABI measurement are:
- Simultaneous measurement on arms and ankles (4 cuffs) to exclude the influence of blood pressure changes during examination
- Operator independent procedure which can be easily delegated
- Examination takes less than 3 minutes
- Automated computer controlled measuring procedure
- Computer assisted evaluation and classification of measuring results including side comparison
- Patient data base and capability for off-line data analysis
- Data export capability (GDT, PDF)
- Additional options: Pulse wave velocity and pulse wave analysis
- External computer: Panel PC with touch screen or standard PC or notebook
- Combination with other VasoScreen and CardioScreen devices is possible
The Doppler-assisted ABI measurement is very time-consuming and gives reliable results only if the examination is made by an experienced operator. Additionally, the blood pressure values cannot be taken at the same time on arms and ankles so that blood pressure changes during the examination are not considered. Comparison studies have shown an excellent correlation between oscillometric and Doppler methods.
Applications
- Pulsoscillometry: To measure peripheral blood pressures, pulse wave velocities and pulse curve parameters for:
- Arterial screening for early detection of arteriosclerosis
- Diagnosis of peripheral arterial occlusive diseases (PAOD)
- Recognition of subclavian artery stenosis
- Therapy control after dilatations, vascular training or medicamentous therapy
VASOSCREEN 4000-5000
This device is designed for arterial and venous vascular diagnosis. Depending on the diagnostic needs it can be delivered with channels for Impedance Plethysmography (IPG), Photo-Plethysmography (PPG) and/or Light-Reflection Rheography (LRR/D-PPG).
In combination with the pneumatic module VasoScreen 4000 the system can be used to perform also venous and arterial Occlusion Plethysmography (VOP and AOP).
The unit can be used only together with an external computer on which the Windows software Cardio-Vascular-Lab is installed.
The advantages of the system are:
- Simultaneous measurement on both sides
- Operator independent procedure which can be easily delegated
- Automated computer controlled measuring procedure
- Computer assisted evaluation and classification of measuring results including side comparison
- Patient data base and capability for off-line data analysis
- Data export capability (GDT, PDF)
- External computer: Panel PC with touch screen or standard PC or notebook
- Combination with other VasoScreen and CardioScreen devices is possible
Applications
- IPG · Impedance-Plethysmography: for pulse wave analysis in legs, arms and head to diagnose arteriosclerotic changes, stenoses or occlusions
- PPG · Photo-Plethysmography: for pulse wave analysis in fingers and toes to diagnose peripheral circulatory disturbances with regard to functional (Raynaud) or organic origin
- AOP · Arterial-Occlusion-Plethysmography: for measuring arterial inflow in the legs after complete arterial occlusion (reactive hyperemia) to diagnose the severity of a peripheral arterial occlusive disease
- VOP · Venous-Occlusion-Plethysmography: for the measurement of venous capacity and venous outflow to diagnose deep vein thromboses (DVP) or other outflow disturbances and to evaluate their haemodynamic severity
- LRR · Light-Reflection-Rheography: for evaluation of venous pump volume and refilling time to diagnose function of venous valves and effectiveness of the venous muscle pump
