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Publication Number
US-12023098-B2
Publication Date
2024-07-02
Expiration Date
Abstract
The present invention provides a catheter for treating occlusions in body lumens. The catheter includes a catheter body that is fillable with fluid. An impactor is connected to the distal end of the catheter body and has a proximal end inside the catheter body and a distal end outside the catheter body. The catheter also includes a shock wave source configured to generate a shock wave, and a deflector coupled to the proximal end of the impactor in between the shock wave source and distal end of the catheter body. When the shock wave source generates a shock wave, the shock wave impinges on the deflector causing the deflector to advance in a forward direction in conjunction with the impactor such that the distal end of the impactor delivers a mechanical force to the occlusion to restore flow to the body lumen.
Core Innovation
A catheter for treating an occlusion in a body lumen uses a shock wave source that generates a shock wave inside a catheter body. The catheter body has a distal end and is fillable with a fluid. An impactor is connected to the distal end, with a proximal end inside the catheter body and a distal end outside the catheter body.
A deflector is coupled to the proximal end of the impactor between the shock wave source and the distal end of the catheter body. When the shock wave source generates the shock wave, the shock wave impinges on the deflector. The deflector advances in a forward direction in conjunction with the impactor such that the distal end of the impactor delivers mechanical force to the occlusion.
The disclosed system produces repeated axial oscillations, including a jackhammer effect, to mechanically rupture the occlusion and restore lumen flow. A portion of shock energy is deflected transversely to treat calcified tissue around the catheter.
Claims Coverage
The independent claim covers a shock-wave catheter architecture with four inventive elements: a fluid-fillable catheter body, an impactor with proximal and distal ends, a shock wave source configured to generate shock waves, and a deflector positioned between the shock wave source and the distal end so that shock-wave impingement advances the deflector and impactor to deliver mechanical force to an occlusion.
Deflector-driven impactor translation by shock-wave impingement
A catheter for treating an occlusion in a body lumen comprising a catheter body fillable with a fluid, an impactor connected to the distal end with a proximal end inside and a distal end outside, a shock wave source configured to generate a shock wave, and a deflector coupled to the proximal end of the impactor between the shock wave source and the distal end, wherein the shock wave impinges on the deflector causing the deflector to advance forward in conjunction with the impactor such that the distal end delivers mechanical force to the occlusion.
The independent claim defines the core inventive relationship between the shock wave source, the deflector placement, and the resulting forward advancement that couples shock-wave impingement to mechanical force delivered by the impactor to an occlusion. Dependent claim refinements described in the partial content include constrained deflector advance, high-voltage pulse and repetition-rate ranges, laser/optical-fiber shock-wave generation, and transverse deflection of a portion of shock energy.
Stated Advantages
Potential reduction in need for multiple devices by deflecting a portion of shock energy transversely to treat calcified tissue around the catheter.
Documented Applications
Treating an occlusion in a body lumen, including CTO lesions and calcified plaques, by mechanically rupturing the occlusion and restoring lumen flow.
Treating kidney stones/ureter occlusions using the shock-wave catheter to deliver mechanical force to the occlusion.
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