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Electromagnetic DSWL
Double Shockwave Lithotripsy

Duet Magna introduces the combination of electromagnetic technology and the double shockwave concept, allowing for some clear and unique advantages in the field of shockwave lithotripsy.

Reducing Kidney Damage

An Indiana University study on Double Shockwave Lithotripsy (performed on the Duet Magna's predecessor device) showed a 5-fold reduction in kidney damage*.  "The lesion produced by 2400 SWs (1200 SWs/head, power lever 10) at120 SWs/min in alternating mode was quite low (0.22 ±0.09% FRV) and compares favorably with the lesion (1.08 ±0.38% FRV) produced by 2400 SWs delivered with the HM3 Lithotripter at 120 SWs/min (23kV)…" *Handa et al. Journal of Urology, February 2009


The Butterfly Focal Area

magna2_768The Duet Magna is equipped with two reflectors and performs Double Shockwave Lithotripsy (DSWL) from these two sources.

DSWL results in the formation of a unique Butterfly Focal Area that concentrates pressure to the stone from two different angles, and spreads the "head and tail" of the shock wave volume to reduce the risk of kidney damage.

In fact, the Duet Magna roughly converts the focal volume to a sphere, which is considered the ideal focal volume for lithotripsy.   The Butterfly Focal Area is superior to the conventional ellipsoid, or "cigar", that only utilizes the central section of the focal area.  This renders the "head and tail" of the focal area useless in terms of stone disintegration and only contributes to kidney damage.

Distribute the Energy to Reduce Renal Damage

The Duet Magna, like its predecssor, the electro-hydraulic Duet, causes significantly less kidney damage than treamtents with a single reflector. The clear advantage of Double Shockwave Lithotripsy lies in the fact that the total number of shocks is divided between two areas of the kidney so that only half of the shocks propagated towards the stone pass through the lower part of the kidney, while the other half pass through the upper part.

C-arm Options

A variety of fluoroscopy units can be used with Magna for stone localization, 3Dscope dedicated systems or general purpose C-arms.

C-arms from a variety of manufacturers can easily be coupled to the Duet Magna, and can be used for lithotripsy as well as for traditional urological procedures.

Direx offers 3DScope Premium, a dedicated, motorized, remote controlled unit, with high quality digital imaging.



Ultrasound Options

  • Mechanically built with required height and length to match the focal point of Magna, it interconnects mechanically as a single unit.
  • Motorized rotation movement for fast and precuse localization.
  • Remote controlled from Magna console, thus allowing treatments with minimal possible radiation to the operators.
  • Foldable arm leading to easy transportation for mobile systems


Urological Procedure Options

The treatment table enables comfortable shockwave lithotripsy treatments, as well as other urological procedures. The table is electrically operated on three axes, plus the Trendelenburg movement.




"In-Line/On-Line" Ultrasound

Idemagna5_882ally, ultrasound localization should be applied by presenting an image that coincides with the shockwave delivery path.  Magna's special design allows in-line ultrasound image acquisition without stopping the treatment session.  On-line imaging allows continuous monitoring and control of the stone fragmentation process without stopping the treatment.  Ultrasound and X-ray imaging can be operated and viewed simultaneously with the dedicated Duet Magna image processing software.


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