The functional prototype consists of a clinically usable shock wave applicator, designed for both single and tandem shock wave generation. It can be used for lithotripsy, particularly for more effective fragmentation of large choledocholithiasis that cannot be treated endoscopically, as well as for applications in oncology, orthopedics, and potentially rheumatology.
The core of the device is a shock wave generator based on the principle of multichannel discharge.
The generator is mounted on a positioning system that allows movement along the x, y, and z axes and adjustment of the tilt angle. This enables precise positioning of the generator so that the focal point is located at the desired site inside the patient’s body.
The generator reflector is covered with a metal mesh to ensure electrical safety. The entire generator is placed in an open liquid bath filled with a conductive fluid, and the unit is built into a treatment table. The patient can be positioned on the table so that the relevant part of the body is submerged in the liquid, which ensures optimal transmission of shock waves into the patient’s body.
Inside the composite anode is an ultrasound probe, which is used to target the focal point. Since it is aligned with the reflector axis, the probe continuously visualizes the focus during the procedure. The probe can be rotated or completely removed if needed.
The applicator also includes a high-voltage DC power supply, high-voltage pulse capacitors for generating HV impulses, and a spark gap switching system.
The device underwent functional and safety testing with positive results. A utility model and a PCT patent application have been filed (PCT application No. PCT/CZ2014/000162, utility model file No. PUV 2014-30492).
One of the main advantages of this globally unique applicator is the easy replacement of the composite anode, which allows changing the type of generated shock wave (single or tandem). This makes the applicator versatile and suitable for use in multiple medical fields.
In comparison with existing shock wave generators, this is a completely new and unique type of generator integrated directly into the applicator.
It allows the adjustment of the parameters and waveform of the generated shock wave — something that current devices only offer to a limited extent. Moreover, it achieves significantly higher focal pressures while maintaining a small focal size.
Because the targeting system is aligned with the applicator axis, it is easier to localize, for example, a stone (lithiasis) and to verify targeting during the procedure.