![]() ![]() Vasomotor reactivity (VMR) and autoregulation define the physiological compensatory mechanisms when flow is impaired. Furthermore, the embolic travel in the depth and time domains can be viewed for additional discrimination from artifact events. Each embolic event can be further analyzed with extremely high temporal and depth resolutions, and the specifications of each event displayed in a special screen. The test can be performed unilaterally or bilaterally, with automatic count of high intensity transient signals (HITS) which are considered as embolic events. The Viasonix Dolphin is ideal for PFO examinations, with a dedicated PFO protocol. ![]() If embolic events are found in the recorded cerebral blood flow, typically the middle cerebral artery (MCA), then this is an indication of the existence of PFO in the patient. TCD can easily identify the existence of PFO by injecting micro-bubbles (air mixed saline) to the patient vein (typically the antecubital vein), while the Doppler signal is recorded during the Valsalva maneuver. If the hole fails to close naturally after birth it is called PFO. While this hole exists in everyone before birth, it most often closes shortly after birth. PFO is a hole between the left and right atriums of the heart. Transcranial Doppler is very useful in the identification of patent foramen ovale (PFO). Thus, even after the measurement is freezed the examiner can scroll back and view signals from any depth and replay the spectrum from any depth, even if it is different than the original set depth. This significantly reduces the risk of missing a valid blood flow signal and reaching an erroneous clinical diagnosis. The Viasonix Dolphin special m-mode option allows the examiner to view flows at all depths along the ultrasound beam. In order to accept the absence of a Doppler signal in any vessel, a prior valid measurement must be identified in the same vessel to ensure that the access temporal window is fine. Note that there are countries in which the use of TCD for diagnosis of brain death is not accepted.įor determination of brain death, the characteristic waveforms should be displayed in all intracranial vessels. TCD can detect the different stages of brain death through analysis of the particular waveforms: a sharp systolic peak followed by near zero diastolic velocities systolic spikes followed by retrograde diastolic velocities short spikes and ultimately, no signals at all. ![]() Or schedule a free demonstration to fully assess each feature and to see how easily this ultramodern and comprehensive diagnostic system will adapt to and integrate with your existing workflows and speed up your ABI tests. Palmar Arch Test and Arteriovenous (AV) Fistula Examinationsġ Dedicated cerebrovascular function measurements are available in the Viasonix Dolphin range of Transcranial Doppler (TCD) systems, also available from MedTech Edge.Īll tests and measurements available on the Falcon/PRO support dedicated protocols and reports that are fully customisable and configurable to your needs.Ĭontact us to learn more about the specific features of the Falcon/PRO ABI machine and vascular diagnostic system. Maximal Venous Outflow (MVO) and Segmental Venous Capacitance (SVC) Determination The use of Doppler to measure the distal waveform is the gold standard for ABI measurements, with PPG sensors a suitable secondary method for measurements at specific locations.ĪBI tests and SBP measurements are not the only vascular diagnostics possible with the Falcon/PRO, routine and specialty tests also supported include Like the pressure cuffs, the Doppler probes and all the PPG sensors are colour-coded for ease of use. The device also has five PPG channels, and you can use disk, finger, or toe clips, with simultaneous finger and toe measurements possible. The device supports three Doppler probes at 4 MHz, 8 MHz, and 10 MHz frequencies, with the 10 MHz probe ideally suited for examining more superficial peripheral blood vessels. However, being a complete vascular diagnostics system, the Falcon/PRO also includes Doppler ultrasound and Photoplethysmography (PPG) functionality. Although cuff inflation and deflation can be automated, you are still able to customise the inflation pressure and the deflate rate to ensure optimal measurements with each test. The Falcon/PRO supports an unlimited number of protocols that you can build, configure, or edit as needed. Once placed, all that is left to do is select the ABI protocol and the device automatically performs the relevant tests. The tubes used to connect pressure cuffs are colour-coded, allowing for uncomplicated placement on right and left brachial and ankle sites. With the Falcon/PRO a standard ABI test can be completed in minutes. A key requirement with ABI tests is for them to be simple and fast to carry out, but with accurate results delivered every time.
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