biolitec® CALA SYSTEM

biolitec® LEONARDO® FPS

The special feature of the biolitec® LEONARDO® FPS laser is the Fiber protection system (FPS). With the help of this safety system FPS, the laser switches off automatically if light with a wavelength other than 1064nm is produced during the laser application via the light guide located in the fiber. These wavelengths are produced when blood or tissue is in contact with optics. This feature prevents overheating damage to tissue. The FPS thus contributes considerably to the safety of the overall system [1,3].

A major importance here is the histologically proven difference between the laser lesion and the RF lesion. Laser lesions show a transmural coagulation necrosis, that are clearly recognizable, oval to semicircular and of similar size. The RF lesion, on the other hand, shows areas with coagulation necrosis of different shapes and sizes. In some cases, the endocardium was vaporized or detached, leaving tissue flaps at the lesion margins [2].

Compared to other catheter ablations, laser treatment of long lasting persistent atrial fibrillation represents a long-term success rate of 96% due to the low risk, short treatment duration and reduced likelihood of further treatment [3].

biolitec® LEONARDO® FLOW Irrigation pump:

A high precision pump that irrigates the fiber and provides a better medium to ablate the tissue. This allows the fiber tip to be clear of any debris and reduce the chances of thrombus formation.

Touchscreen enables the pump to operate at various flow rates (1 to 60 ml/min) with following presets: Low-flow at 15 ml/min and High flow at 30ml/min. The FPS laser works only with the LEONARDO® FLOW irrigation pump.


biolitec® CALA Fiber:

A laser fiber with irrigation channels and two electrodes at the fiber end to collect intracardiac electrograms. This fiber can provide better transmural lesion and can indirectly monitor the lesion formation by the diminishing electrograms when ablating the tissue.

This fiber has proven to be reliable and efficient with good results [3].



  1. H. P. Weber, W. Kaltenbrunner, A. Heinze, K. Steinbach, Laser catheter coagulation of atrial myocardium for ablation of atrioventricular nodal reentrant tachycardia: First clinical experience, European Heart Journal, Volume 18, Issue 3, March 1997, Pages 487–495.
  2. Weber H, P, Heinze A, Enders S, Ruprecht L, Unsöld E: Laser versus Radiofrequency Catheter Ablation of Ventricular Myocardium in Dogs: A Comparative Test. Cardiology 1997; 88:346-352.
  3. Weber, H., Sagerer-Gerhardt, M., & Heinze, A. (2017). Laser catheter ablation of long- lasting persistent atrial fibrillation: Longterm results. Journal of atrial fibrillation, 10(2), 1588.