Multi-section foldable ureter plugging device

Abstract

The invention discloses a multi-section foldable ureter plugging device belonging to the technical field of medical equipment. The technical key points are as follows: the multi-section foldable ureter plugging device comprises a guide pipe, wherein a guide wire is arranged in the guide pipe in a penetrating manner, a thready plugging structure is formed at the free end of the guide pipe, and consists of a first positioning ring, a connecting ring and metal filaments, the first positioning ring is fixed on the guide wire, the connecting ring is sheathed at the periphery of the guide wire between the first positioning ring and a guide pipe, and the metal filaments are uniformly distributed along the circumferential direction of the guide wire and are connected between the first positioning ring, the connecting ring and the free end of the guide pipe; and the guide wire at the fixed end of the guide pipe is pulled, and the alls sections of the metal filaments can retract along the axial direction of the guide pipe so as to form a plurality of circular or elliptical plugging nets. The multi-section foldable ureter plugging device has the advantages that the structure is compact, the expanding diameter of the plugging structure can be adjusted according to demands so as to adapt to the structure of the expanded ureter, the operation is convenient and the using effect is good, and is used for ureteroscopic lithotripsy.

Description

technical field [0001] The invention relates to a medical device, more specifically, to a multi-section folded ureteral occluder. Background technique [0002] Ureteral calculus is one of the common diseases in the urinary system. Obstruction by calculi often leads to damage to renal function, and in severe cases, it can lead to renal failure. Ureteroscopic lithotomy is currently one of the most important methods for dealing with ureteral calculi, and has the advantages of less surgical trauma and faster recovery. [0003] However, because ureteral stone obstruction often leads to the expansion of the ureter and kidney above the obstruction, when ureteroscopy is used to remove the stone, it is necessary to flush water retrogradely during the operation to ensure a clear surgical field of view, but the stone often drifts into the kidney with the retrograde water flow, thus Affect the removal of stones. On the other hand, the mechanical force generated during lithotripsy ...

AI Technical Summary

Problems solved by technology

[0005] (1) The mesh stone basket is easy to cause stones to move during the placement process;

[0006] (2) Ureteral stones vary in size and shape, and the mesh basket cannot catch all stones;

[0007] (3) After the stone is trapped in the mesh basket, the stone is located inside the basket, and it is impossible to perform effective lithotripsy under the endoscope.

[0009] (1) The diaphragm enters the ureter in an unfolded state, and has a large volume. It is not easy to pass through the stone to reach the proximal end of the ureter, and it is easy to cause the stone to move during the placement process;

[0010] (2) When the diaphragm is compressed, a plug-like object is formed, which is irregular in shape and cannot completely seal the ureter;

[0011] (3) The diameter of the embolus is fixed when the diaphragm is compressed, and it cannot effectively block the severely dilated ureter

[0013] (1) The steel wire naturally expands to form a mesh, but the diameter is relatively fixed, and it is difficult to effectively block the ureter with different expansion degrees;

[0014] (2) During the crushing process of the steel wire mesh, the movement of stones may cause the wire mesh to compress and deform to the side (flattening, etc.), which cannot effectively seal

[0015] On the other hand, due to stone obstruction, the hydroureter above the obstruction is expanded, and the degree of ureter expansion is different from top to top. The renal pelvis and calyces and the upper ureter are severely expanded, resulting in different shapes of the ureter above the stone obstruction. The current ureteral occluder cannot Suitable for the needs of dilated ureter structure

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