SU1648405A1 - Appliance for removing calculi from the ureter - Google Patents

Abstract

This invention relates to medicine, namely to urology, and is intended to remove stones from the ureter. In order to simplify the construction, the ureter dilator is made in the form of removable telescopically placed on the guide tube 1 of additional tubes 3 with conical working ends. 2 Il.

Description

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This invention relates to urology and is intended to remove stones from the ureter.

The purpose of the invention is to simplify the design.

FIG. 1 shows a stone extraction device, operating position, a soft loop version; figure 2 - the same version of the basket.

The stone extraction device comprises a guide tube 1 with a device 2 for gripping stones, which can be made in the form of a loop or in the form of a basket.

Additional tubules 3, ureteral dilators, are removably and telescopically mounted on the guide tube 1. The tubules 3 are made of fluoroplastic (Teflon) material and have a truncated cone shape at the end.

At the same time, the end of one tube is 0.5-0.7 cm from the other. The outer diameter of the first tube is 0.3-0.4 cm, the inner diameter is 0.2-0.3 cm, and its wall thickness is 0.05. cm.

The diameter of each subsequent tube is thus increased by 0.1-0.5 cm. The number of tubes clad one over another depends on the cross-section of the calculus.

The device works as follows .I

After determining the shape and size of the stone, an appropriately sized soft or metal loop or basket is selected. 1-2 or 3 Teflon tubes 3 are sequentially put on guide tube 1 from such a calculation so that the outer diameter of the last tube is closer or even larger than the stone's diameter, the device is inserted into the ureter. Thanks to the tubules 3, a dilatation of the ureter lumen below the stone occurs, Teflon slides easily along the mucous membrane, carries the stone behind the stone and does not injure the wall of the ureter,

The use of the device reduces the complications associated with the retraction of ureteral stones.

Claims (1)

The device allows simultaneous use of both forced traction and the constant loop method. At the same time, the time for the stones to move away during the operation of soft loops is reduced by a factor of 2 to 3. Apparatus of the Invention A device for extracting stones from the ureter, comprising a guide tube with a device for gripping a stone and an ureter dilator, characterized in that, in order to simplify the design, the expander is made in the form of removable tubules that are telescopically placed on the guide tube with tapered working ends.