CW Mode is used for acoustic orientation and display of Doppler signals from the region of interest. In PW mode, Doppler shift and FFT information results only from the sample volume selected. You have the ability of toggling 4 MHz and 8 MHz transducers between PW and CW operation.
Available with 2 and 2,9 meter cable length.

2 MHz DWL® Ultrasound Probes PW

The 2 MHz probe is used primarily in transcranial investigations to insonate the main arteries of the brain, the so-called "Circle of Willis".
The 2 MHz probe can penetrate to a depth of approx. 30-150 mm.

1 MHz DWL® Ultrasound Probes PW

Using 1 MHz probes it is possible to examine patients with hyperostoses and those with complicated windows.
The benefit of a 1 MHz probe compared with a 2 MHz probe lies in the ability to take measurements at high flow velocities at greater depths, e.g. in the case of vasospasm or deep-seated stenoses of the basilar artery.
The 1 MHz probe can penetrate to a depth of approx. 30-150 mm.

2+2.5 MHz DWL® Ultrasound Probe PW 2

The 2+2.5 MHz probe was especially developed for the transcranial discrimination of emboli in the Circle of Willis. Unlike other probes, that probe offers a greater bandwidth of 2 MHz to 2.5 MHz, enabling investigations in dual-frequency mode.
The 2+2.5 MHz probe can penetrate to a depth of approx. 30-150 mm.
N.B.
The multi-frequency 2+2.5 MHz is meant for exclusive use with the Software Module Embolism-Differentiation and is currently not licensed for use in the USA.

4 MHz DWL® Ultrasound Probes PW & CW

The 4 MHz probe reaches all arteries and veins located within the penetration depth of this frequency, e.g. extracranial carotids, femoral artery, brachial artery.
The 4 MHz probe can penetrate to a depth of approx. 12-30 mm.
Note for German doctors:
When carrying out diagnosis with 4 MHz probes the Health Insurance accepts only CW-application!
4 MHz DWL® Ultrasound Probes

8 MHz DWL® Ultrasound Probes PW & CW

Using the 8 MHz probe it is possible to insonate all peripheral arteries and veins located within the penetration depth of this frequency, e.g. the supratrochlear artery, radial artery, ulnar artery.
The penetration depth here is approx. 6-20 mm.
Note for German doctors
The Health Insurance only accepts CW-application with this probe, too!

5-12 MHz linear array 3
For carotis duplex in B-mode, Color-Doppler- and Triplex-Mode.

16 MHz DWL® Ultrasound Probes

16 MHz probes are used to measure blood flow conditions in the microvascular region. It is not only possible using the 16 MHz frequency to detect the blood flow in vessels near to the surface (non-invasive investigation), it is also possible invasively to place the probe directly on the wall of the vessel to be investigated, for example in case of anastomosis. Standard versions of the 16 MHz probes are available in diameters of 1 mm, 2 mm and 3 mm.
 

Sterile disposables 16 MHz ultrasound Doppler probe

For various intraoperative application e.g. clipping of aneurysm, disposable probes with 1,3 mm diameter are available. 16 MHz endoscopy probes are equipped with a special cable that does not roll up, and, with its diameter of 1.8 mm it is designed for the duct to be investigated.
Each of the 16 MHz probes can penetrate to a depth of approx. 0.5 mm to 8.0 mm. 16 MHz probes can penetrate to a depth of approx. 0.5 mm to 8.0 mm.

Certificate for resterilizable medical devices can be downloaded here

Probe Navigator

Designed for the safe insertion and navigation of 16 MHz probes the cable of the probe navigator is led through the shaft and handle in order that vision is not restricted in the operating area. Guides are available in various shapes and lengths. The instrument is made of stainless steel, washable, autoclaveable and offered with an optional sieve container and sterilization container.
The probe navigator is the proprietary development of DWL® in close cooperation with the Clinic of Neurosurgery at the University of Mainz and its Director, Prof. Alf Giese.