EHL-System

EHL-System

Lithotron EL 27 Compact

EHL Features

✓ Highest efficiency compared to other technologies, short operation times

✓ Stones are normally disintegrated with only a few shock waves

✓ Security: shock waves destroy hard objects and treat soft tissue with care✓ Highly localized energy transfer compared to laser and extracorporal shock waves

✓ Endoscope protection through rounded probe tips; no breaking problem compared to laser fibers

✓ Controlled energy levels: 3 intensities (up to 950 mJ) adjusted to usage in gastroenterology and urology

✓ Very fast pulses, sharply rising amplitudes for most effective stone fragmentation

✓ Automatic pulse frequency (10-40 Hz)

✓ Automatic probe type recognition ✓ Automatic probe depletion recognition

✓ Single and continuous pulses controlled by footswitch

✓ Dimensions: 320 x 120 x 240 mm; 7,5 kg

EHL Broschüre D

EHL Brochure EN

 

EHL Probes

✓ All flexible EHL probes can be ordered sterile or non-sterile

✓ Probes are highly flexible but keep their position

✓ Precisely worked probe tip for reproduceable shock waves

✓ Rounded probe tips help insertion in endoscope and protect the endoscope

✓ Centered plasma helps maintain distance to tissue (advantage bipolar over coaxial electrodes)

✓ Dedicated gastroenterology probes for use with Mother-Babyscope, SpyGlass®, cholangioscope or ultraslim gastroscope (endoscopic retrograde cholangiopancreatography, ERCP).

Sondenbeiblatt EHL

Technology EHL (Electrohydraulic Lithotripsy)

EHL_Grafik2_Deutsch

Disintegration of renal and urinary calculi (common bile duct stones, bladder stones, kidney stones) by a shock wave that results from an intracorporeal electric discharge.

Technology EHL
The probe is advanced to the stone through the working channel of an endoscope. The position is monitored via direct endoscopic view and via x-ray. A controlled, very fast electric discharge centered at the tip of the probe generates a spark plasma.

The way it works
The double effect of micro-shock waves and the micro-high-speed water jet destroys stones with maximum effectiveness. Thanks to the minimized pull phase and the short range of the micro shock wave, the surrounding tissue is protected.

Veterinary-Medicine

We are still new in the field of veterinary medicine, but the first customers are already using our EHL technology to effectively fragment stones in animals. This technology enables a gentle and precise treatment of stones.

Our EHL technology is suitable for large animals such as horses and cows as well as for small animals such as dogs and cats and can be used successfully to treat urinary stones in particular.

Thanks to its precision, EHL technology enables targeted fragmentation of urinary stones, leaving healthy tissue unaffected.

Although new to veterinary applications, we bring their expertise from other fields to the development of innovative animal health solutions.

We work closely with veterinarians to optimise the effectiveness of EHL technology and offer tailored solutions for different animal species.

The company continuously invests in research and development to further improve the EHL technology and to open up the new field of application of veterinary medicine.

Service

EL27 Wandfoto A1 DISPA 300

For the devices Lithotron EL 27 Compact, Lithotron EL 28-X1 as well as the previous models we offer the safety check (STK) as well as repairs.

All service and equipment repair is performed directly at the manufacter Walz Elektronik GmbH in Rohrdorf by experienced technicians.

Training services are offered. Please ask us for details and quotes using the contact form. We will gladly provide an individual solution for you.

Videos

EHL in slow motion

Electro hydraulic Lithotripsy in slow motion filmed with a high-speed camera.

Hands-On Walz EHL Lithotron

Professor Hagenmüller introduces the Walz Lithotron and EHL technology. He demonstrates its application in a live procedure with percutane cholangioscopy in the bile duct.

Peeling raw eggs to show sensitive stone fragmentation with Walz EHL devices

We can peel raw eggs without damaging the thin skin underneath the eggshell. Our EHL-devices fragment hard substances. They are ideal for fragmenting stones in gastroenterology and urology. Body tissue is treated with care. Also at higher power levels.

Fragmentation of a bilestone using direct peroral cholangioscopy with EHL-technology

Comminution of a large concrement in the biliary tract with a view impacts.

J.H. Moon, Soon Chung Hyang University School of Medicine, Bucheon/Seoul, Korea

Fragmenting a stone in a basket

In the laboratory a stone is caught in a basket. Our new 2,4F (0,031 inch) Walz-EHL probe is advanced through the guidewire-channel and the stone is fragmented.

Walz Lithotron EL 27 product presentation

Karl-Heinz Marx, sales manager Germany, Austria and Switzerland presents the Walz Lithotron EL 27 Compact.

Huge concrement in the duodenum

After 2 hours of unsuccessful trial with a stone laser the huge concrement is fragmented with Walz EHL in just 20 minutes.

Copyright: PD Dr. med. Brigitte Schumacher, Evangelisches Krankenhaus, Düsseldorf, Germany

Concrement in the gall bladder, Live-demonstration during Endo Club Nord

Concrement in the gall bladder, Live-demonstration during Endo Club Nord

Copyright: Prof. Dr. med. Friedrich Hagenmüller, Asklepios Klinik Altona, Hamburg, Germany

Concrement in the bile duct

An incarcerated stone in the hepatic fork is fragmented by Walz EHL. Access via direct cholangioscopy.

Copyright: Prof. Dr. med. Jürgen Pohl, HSK, Wiesbaden, Germany

 

Concrement in the bile duct

Copyright: Prof. Dr. med. Jürgen Pohl, HSK, Wiesbaden, Germany

Live-demonstration Prof. Hagenmüller, Endo Club Nord 2012

Prof. Dr. med. Friedrich Hagenmüller shows the safety of Walz EHL even for sensitive tissue in an experiment on himself.

Copyright: Prof. Dr. med. Friedrich Hagenmüller, Asklepios Klinik Altona, Hamburg, Germany

Gall Stones

Gall stones – a huge variety in size, shape, colour and surface structure.

With a big thank you for a good cooperation to Mrs. Navena Widulin, Berliner Medizinhistorisches Museum der Charité – Universitätsmedizin Berlin.

Copyright Navena Widulin

Publications

Sample of scientific publications related to lithotripsy

Jae Hyung Lee, Hyung Wook Kim, Dae Hwan Kang, Cheol Woong Choi, Su Bum Park, Suk Hun Kim, Ung Bae Jeon. Usefulness of Percutaneous Transhepatic Cholangioscopic Lithotomy for Removal of Difficult Common Bile Duct Stones, Clinical Endoscopy, January 2013

Jürgen Pohl, Direct cholangioscopy with standard ultra-slim endoscopes for electrohydraulic lithotripsy of an incarcerated large bile duct stone. Video Journal and Encyclopedia of GI Endoscopy 2012

ens Cordes, Birgit Lange, Dieter Jocham, Ingo Kausch. Akzidentielle Zerstörung von Steinfangkörben. Urologische Nachrichten 01.2012

R. Jakobs. Der schwierige Gallengangsstein: Eine Herausforderung in der klinischen Praxis. J Gastroenterol Hepatol ERKR 2011; 9(1)

T. Nordmann, B. Schumacher, H. Neuhaus. Endoskopische Therapie des Bouveret-Syndroms mit Laser- und elektrohydraulischer Lithotripsie. Endo-Praxis 2011; 27(1): 14-19

Classen M., Tytgat G., Lightdale C. Gastroenterological Endoscopy, 2nd Edition, Thieme Verlag Germany, 2010, pp. 443-458

Hwa Jong Kim, Jong Ho Moon, Hyun Jong Choi, Hyun Cheol Koo, Sung Jin Park, Young Koog Cheon, Young Deok Cho, Moon Sung Lee, Chan Sup Shim. Endoscopic removal of an enterolith causing afferent loop syndrome using electrohydraulic lithotripsy. Digestive Endoscopy (2010) 22, 220-222

Hwa Jong Kim, Jong Ho Moon, Hyun Jong Choi, Hyun Cheol Koo, Sung Jin Park, Young Koog Cheon, Young Deok Cho, Moon Sung Lee, Chan Sup Shim. Endoscopic removal of an enterolith causing afferent loop syndrome using electrohydraulic lithotripsy. Digestive Endoscopy (2010) 22, 220-222

Fredrik Swahn, Gunnar Edlund, Lars Enochsson, Conny Svensson, Bo Lindberg, Urban Arnelo. Ten years of Swedish experience with intraductal electrohydraulic lithotripsy and laser lithotripsy for the treatment of difficult bile duct stones: an effective and safe option for octogenarians. Surg Endosc (2010) 24: 1011-1016

Akio Katanuma, Hiroyuki Maguchi, Manabu Osanai, Kuniyuki Takahashi. Endoscopic treatment of difficult common bile duct stones. Digestive Endoscopy (2010) 22 (Suppl. 1), S90-S97

Jong Ho Moon, Bong Min Ko, Hyun Jong Choi, Hyon Cheol Koo, Su Jin Hong, Young Kooog Cheon, Young Deok Cho, Moon Sung Lee, Chan Sup Shim. Direct Peroral Cholangioscopy Using an Ultra-Slim Upper Endoscope for the Treatment of Retained Bile Duct Stones. Am J Gastroenterol 2009; 104: 2729-2733

Schwacha H et al. Endoscopic therapy of gallstones ileus. Endoscopy 2008; 40: E185-E186

Mori A et al. Electrohydraulic lithotripsy of the common bile duct stone under transnasal direct cholangioscopy. Endoscopy 2007; 39: E63-E63

Lammert F et al. S3-Leitlinie der Deutschen Gesellschaft für Verdauungs- und Stoffwechselkrankheiten und der Deutschen Gesellschaft für Viszeralchirurgie zur Diagnostik und Behandlung von Gallensteinen. Z Gastroenterol 2007; 45: 971-1001

C.-K. Hui, K.-C. Lai, M. Ng, W.-M. Wong, M.-F. Yuen, S.-K. Lam, C.-L. Lai, B.C.Y. Wong. Retained common bile duct stones: a comparison between bilary stenting and complete clearance of stones by electrohydraulic lithotripsy. Aliment Pharmacol Ther 2003; 17: 289-296

Koch H., Rösch W., Walz V. Endoscopic lithotripsy in the common bile duct. Gastro. Endosc. 1980 Feb., 26(1), pp. 16-18

Walz V. Untersuchungen an einer Sonde zur elektrohydraulischen Lithotripsie, Diplomarbeit. Institut für biomedizinische Technik, Universität Stuttgart, Germany, August 1974