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Urology
January 19th, 2016

Stop wasting your time and resources chasing stones.


Have you ever zeroed in on an intact stone or rogue fragment during lithotripsy and had it migrate out of view? Retropulsion, however it occurs, can prolong your procedures.1 That’s where we come in. Cook Medical has several innovative products that specifically address this frustrating phenomenon.

During laser lithotripsy, the very pulse of energy that is intended to break the stone can also cause the stone to migrate out of your field of vision. With that in mind, we designed our H-30® Holmium Laser System with a variable pulse width. In two studies, retropulsion was reduced and equivalent fragmentation occurred when a longer pulse width was used.1,2

You can bust or dust a stone with the H-30. Watch a side-by-side comparison of the laser system’s short and long pulse widths.

Another way to keep the stone where you can see it is to block its path of retreat. This can be accomplished by using the UPJ Occlusion Balloon Catheter or the NTrap® Stone Entrapment and Extraction Device.

UPJ Occlusion Balloon Catheter

UPJ Occlusion Balloon Catheter

As its name indicates, the balloon catheter is used to occlude the ureteropelvic junction (UPJ). This can help you prevent stone fragments from entering the ureter during percutaneous lithotripsy.

Similarly, the NTrap device, in addition to being used as an extractor, can be an effective tool that blocks the movement of the stone.3

NTrap Stone Entrapment and Extraction Device

NTrap Stone Entrapment and Extraction Device

A 2013 study, in which NTrap was evaluated, concluded that “it is cost-effective to use an antiretropulsion device at a retropulsion rate of greater than 6.3%.”4

We see each day and each patient as an opportunity to make a difference. Helping you minimize migration is just one of the ways that Cook Medical can bring you value.

For more information on the products listed in this post, please see their instructions for use.
H-30 Holmium Laser System
UPJ Occlusion Balloon Catheter
NTrap Stone Entrapment and Extraction Device


1Kang HW, Lee H, Teichman JM, et al. Dependence of calculus retropulsion on pulse duration during Ho: YAG laser lithotripsy. Lasers Surg Med. 2006;38(8):762-772.
2Finley DS, Petersen J, Abdelshehid C, et al. Effect of holmium:YAG laser pulse width on lithotripsy retropulsion in vitro. J Endourol. 2005;19(8):1041-1044.
3Lee MJ, Lee ST, Min SK. Use of NTrap during ureteroscopic lithotripsy for upper ureteral stones. Korean J Urol. 2010;51(10):719-723.
4Ursiny M, Eisner BH. Cost-effectiveness of anti-retropulsion devices for ureteroscopic lithotripsy. J Urol. 2013;189(5):1762-1766.