A catheter integrating laser ablation and shock wave angioplasty

Abstract

The invention discloses a catheter for integrated laser ablation and vascular shock wave angioplasty, which belongs to the field of diagnosis; wherein the catheter is sequentially divided into a proximal part, a contraction section, an electrode installation section, an open section and a distal end from the proximal end to the distal end At least one set of shock wave lithotripsy electrodes is surrounded and fixed outside the electrode installation section. The contraction section and the open section are variable diameter tube sections. The distal and proximal ends of the balloon are respectively installed on the contraction section and the open section. The inner diameter of the electrode installation section is less than The inner diameter of the distal part; the distal end face of the catheter is the exit end face of the optical fiber and the vascular guide wire lumen; the distal end of the optical fiber arranged in the catheter is arranged on the distal end face, and the proximal end of the optical fiber is connected with the pulse laser. The invention solves the problem that the remaining eccentric and annular lesions cannot be treated when the pulse laser performs laser ablation on the stenosis of the lesion. After laser ablation, shock wave lithotripsy was used to change the compliance of residual calcified lesions, which reduced the difficulty of subsequent balloon dilatation or stent implantation.

Description

technical field [0001] The invention belongs to the technical field of diagnosis, in particular to a catheter integrating laser ablation and blood vessel shock wave angioplasty. Background technique [0002] Percutaneous Coronary Intervention (PCI) is a minimally invasive procedure to dredge the narrowed or even occluded coronary artery lumen through catheter technology, thereby improving the blood perfusion of the myocardium. Traditional treatments include balloon angioplasty or stent implantation. However, coronary artery calcification increases the difficulty of interventional therapy, increases the immediate complications of surgery and the incidence of early and late major adverse cardiovascular events. The reason is that calcified lesions are high-resistance lesions, and the balloon requires very high pressure (sometimes the pressure can reach 10 to 15 standard atmospheres, or even 30 standard atmospheres). Such pressure usually significantly increases the probabilit...

AI Technical Summary

Problems solved by technology

As a result, the diseased tissue outside the section of the catheter still cannot be treated; in severe cases, the calcified lesion is still ring-shaped, and the subsequent balloon expansion will still face high-resistance calcified lesions

[0006] In order to solve the above problems, the present invention discloses a catheter system for laser ablation and shock wave angioplasty. The optical fiber is in a straight line tightening state at the electrode installation section, and the optical fiber at the far end of the electrode installation section changes its direction through the bending part and is re-directed. Arrangement; solves the problem of the consistency of the cross-sectional area of ​​the catheter after the combination of the two treatment techniques of laser ablation and shock wave angioplasty, and also solves the problem of laser ablation on the optical waveguide (optical fiber) through redistribution in the distal part ) coverage requirements

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