Ureteric stone extractor with two ballooned catheters

Details Ureteric stone extractor with two ballooned catheters Ureteric stone extractor with two ballooned catheters

1980-03-21

1981-10-20

Michell, Robert W.

Surgery

Truss

Perineal

128328, 128349B, 128349BV, 128344, A61B 1900, A61B 1700, A61M 2500, A61M 2902

Patent

active

042954649

ABSTRACT:
A ureteric stone extractor (100) is disclosed wherein an inner dislodger catheter (101) is slidable within a relatively larger outer dialator catheter (102). The dislodger catheter (101) comprises a lumen (104) having a stiffening metal stylet (106) therein to allow it to easily pass beyond a stone arrested within a ureter. A dislodger balloon (107) is eccentrically attached to the inner catheter (101) and can be inflated once the inner catheter (101) is positioned above and beyond the arrested stone. Nylon strings (110) positioned along longitudinal axes of the dislodger balloon (107) are manipulable by an attending physician to ensure that the dislodger catheter (101) and the strings (110) entrap the stone and to apply a downward force by the dislodger balloon (107) to the stone sufficient to dislodge it from the ureteral walls. The outer dilator catheter (102) has a cylindrical dilator balloon (113) attached thereto to effect distension and dilation of the ureter below the arrested stone, thereby providing a sufficient spacial area into which the stone can be moved.

REFERENCES:
patent: 3827437 (1974-08-01), Inaba
patent: 4148319 (1979-04-01), Kasper et al.
patent: 4198981 (1980-04-01), Sinnreich
patent: 4202346 (1980-05-01), Granier
patent: 4243040 (1981-01-01), Beecher
"Some New Concepts of Stones of Uretal Stones," Progressive Surg., vol. 13, pp. 185-205, Karger, Basel, 1974.
"Cystoscopic Rx of Stones in the Ureter with Spec. Reference to Lg. Calculi, Based on 1550 Cases", Dourmashkin, R. L., pub. & date unknown.
"A Double-Balloon Ureteric Stone Extractor", The Lancet, Oct. 4, 1969, pp. 724, 725.
Advertisement of V. Mueller Div. of American Hosp. Supply Corp., pp. 400-401, pub. & date unknown.

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