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. 2018 Feb;32(2):96-99.
doi: 10.1089/end.2017.0626. Epub 2018 Jan 9.

Preclinical Testing of a Combination Stone Basket and Ureteral Balloon to Extract Ureteral Stones

Rustin Massoudi  1 , Thomas J Metzner  1 , Buzz Bonneau  2 , Tin C Ngo  1   3 , Rajesh Shinghal  4 , John T Leppert  1   5
Affiliations

Preclinical Testing of a Combination Stone Basket and Ureteral Balloon to Extract Ureteral Stones

Rustin Massoudi et al. J Endourol. 2018 Feb.

Abstract

We have developed the Peralta Stone Extraction System to increase the safety of ureteral stone extraction. The device combines a nitinol stone basket and low-pressure balloon into a single device. After visualization, the stone is captured in the tipless nitinol basket and enveloped by a low-pressure balloon. We tested the performance of device prototypes in a porcine model using stone mimics with diameters ranging from 4.2 to 6.2 mm. Stones extracted with the device required less force when compared with stones in a standard ureteral stone basket. The force reduction was most pronounced for stones greater than 4.2 mm in diameter, and when traversing a ureteral stenosis model. In conclusion, a combination stone basket and balloon device may provide a new and safer way to extract ureteral stones.

Keywords: calculus; nephrolithiasis; surgical procedures; ureteral; ureteroscopy.

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Conflict of interest statement

B.B.: CEO, Calcula Technologies. T.C.N.: Investment interest in Calcula Technologies. R.S.: Investment interest in Calcula Technologies. J.T.L.: Investment interest in Calcula Technologies. No competing financial interests exist for the authors R.M. and T.J.M.

Figures

<b>FIG. 1.</b>
FIG. 1.
The Peralta Stone Extraction System incorporates a tipless nitinol stone basket and a low-pressure balloon that can surround the captured stone for safe extraction.
<b>FIG. 2.</b>
FIG. 2.
The Peralta Stone Extraction System is seen in (A). The four-wire tipless nitinol basket can be used to surround and capture the stone (B). The ureteral balloon is then inflated to 1 ATM (C). The stone and basket can then be withdrawn into the everted balloon, with the option of deflating the balloon (D).
<b>FIG. 3.</b>
FIG. 3.
Images showing the bovine ureter model with a stone secured within the Peralta device (A), and the stenosis model created using orthodontic bands placed around the bovine ureters (B).
<b>FIG. 4.</b>
FIG. 4.
Comparison of force required to extract intact ureteral stones using a standard tipless stone basket and the Peralta Stone Extraction System.
See this image and copyright information in PMC

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