Catheter integrating laser ablation and vascular shock wave plasty

Abstract

The invention discloses a catheter integrating laser ablation and vascular shock wave plasty, and belongs to the field of diagnosis. The catheter is sequentially divided into a near-end part, a contraction section, an electrode mounting section, an open section and a far-end part from the near end to the far end, at least one group of shock wave lithotripsy electrodes surround and are fixed outside the electrode mounting section, the contraction section and the open section are variable-diameter pipe sections, the far end and the near end of the balloon are respectively mounted on the contraction section and the open section, and the inner diameter of the electrode mounting section is smaller than that of the far end part; the far-end end face of the catheter is the outlet end face of the optical fiber and a blood vessel guide wire cavity; and the far end of the optical fiber arranged in the catheter is arranged on the far end face, and the near end of the optical fiber is connected with a pulse laser. According to the invention, the problem that residual eccentric and annular focuses cannot be treated when a pulse laser carries out laser ablation on a lesion narrow part is solved. After laser ablation, shock wave lithotripsy is used to change the compliance of residual calcified lesions, and the difficulty of subsequent balloon dilatation or stent implantation is reduced.

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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