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Radio frequency ablation catheter with reticulated pipe type support structure and radio frequency ablation device

A technology of radiofrequency ablation and stent structure, applied in the fields of radiofrequency ablation catheters and radiofrequency ablation equipment, can solve problems such as poor adaptability of curved blood vessels, and achieve the effects of good coverage, good coverage and good scalability

Inactive Publication Date: 2014-12-24
SHANGHAI GOLDEN LEAF MED TEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, existing radiofrequency ablation catheters generally have poor adaptability to curved blood vessels, and most radiofrequency ablation catheters cannot adhere to the wall at all in curved blood vessels. Therefore, if the new radiofrequency ablation catheter can improve the coverage of curved blood vessels at the same time It will greatly expand the application range of radiofrequency ablation, and at the same time improve the effect of radiofrequency ablation, which has a positive effect on the promotion of radiofrequency ablation

Method used

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  • Radio frequency ablation catheter with reticulated pipe type support structure and radio frequency ablation device
  • Radio frequency ablation catheter with reticulated pipe type support structure and radio frequency ablation device
  • Radio frequency ablation catheter with reticulated pipe type support structure and radio frequency ablation device

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no. 1 example

[0044] Such as Figure 2a and Figure 3a As shown, in the first embodiment, before assembling the mesh tube stent, the mesh tube 1 is first shaped into a central cylinder with both ends contracted (see FIG. 2 ). Specifically, a transition area with a certain inclination angle is provided between the middle cylindrical section (area A) and the contraction sections (ΦB section) at both ends, preferably the inclination angle of the transition area is between 10° and 90° , and, the two ends of the transition region respectively transition with the cylindrical section and the constricted section through circular arcs, and the diameter of the constricted section is equivalent to the diameter of the ablation catheter; The connecting pipe 4 and the second connecting pipe 5 are fixed, so that after assembly, the overall shape of the mesh tubular stent presents a cylindrical shape as shown in 1.

[0045] Figure 2a , Figure 2b , Figure 3a and Figure 3b They are schematic struct...

no. 2 example

[0058] Such as Figure 12 and Figure 13 As shown, the shaped form and assembled form of the mesh tube in this embodiment are different from those of the first embodiment. Before assembling, the mesh tube of the mesh-shaped support is first shaped into a cylindrical shape, and the two ends of the mesh tube are not pre-shrinked, so that when the first connecting tube and the second connecting tube are used to adjust the two ends of the mesh tube After assembly, the overall shape of the tubular stent 10 presents Figure 13 The cylindrical shape shown in the middle protrudes and naturally shrinks at both ends. After the tubular stent 10 expands and adheres to the wall in the blood vessel, multiple electrodes 2 distributed in the middle section of the tubular stent 10 can adhere to the wall at the same time under the action of the vessel wall. Moreover, since the drum-shaped mesh tube is continuously squeezed by the blood vessel wall during the expansion process, the effect of ...

no. 3 example

[0066] In the above-mentioned first embodiment and the second embodiment, the mesh tubes are shaped before being assembled. In the third embodiment provided by the present invention, the mesh tube is not specially shaped before being assembled into a mesh-like bracket. When the radiofrequency ablation catheter protrudes from the sheath, the mesh-shaped stent cannot expand naturally. At this time, by pulling the central wire, it can also ensure that the multiple electrodes set in the middle section adhere to the wall at the same time, and, after the mesh-shaped stent expands and adheres to the wall , the axial projections of the plurality of electrodes do not overlap in the axial direction of the tubular stent, and the circumferential projections of the plurality of electrodes are evenly distributed on the circumferential section of the tubular stent.

[0067] The radio frequency ablation catheter provided by the present invention has been introduced above, and the present inve...

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Abstract

The invention provides a radio frequency ablation catheter with a reticulated pipe type support structure and a radio frequency ablation device. The radio frequency ablation catheter comprises the reticulated pipe type support arranged at the front end of the catheter. The reticulated pipe type support comprises reticulated pipes, one ends of all reticulated pipes are gathered to form a far end of the reticulated pipe type support, and the other ends of all reticulated pipes are gathered to form a near end of the reticulated pipe type support. The middle section of the reticulated pipe type support has a shrinking state and an expanding state, and one or more electrodes are fixed on the middle section of the reticulated pipe type support. The reticulated pipe type support in the radio frequency ablation catheter is good in flexibility, and can well cover blood vessels of different thicknesses and bent blood vessels. When the reticulated pipe type support expands in different blood vessels with the thicknesses being 4-12 mm, all the electrodes can be completely attached to the walls of the blood vessels. Meanwhile, when the reticulated pipe type support expands in a bent blood vessel, all the electrodes also can be attached to the wall of the blood vessel.

Description

technical field [0001] The invention relates to a radiofrequency ablation catheter, in particular to a radiofrequency ablation catheter with a network-like stent structure, and also to a radiofrequency ablation device including the radiofrequency ablation catheter, which belongs to the technical field of medical devices. Background technique [0002] In the radiofrequency ablation system, the radiofrequency electrode is a key device for contacting or approaching the treated human tissue and releasing radiofrequency energy. Radio frequency electrodes are used to convert radio frequency signals into temperature fields, and treat human tissues through thermal effects. During the operation, whether the radiofrequency electrode adheres to the wall has a decisive effect on the therapeutic effect of radiofrequency ablation. [0003] In the radiofrequency ablation catheter, the radiofrequency electrode is installed on the stent at the front end of the radiofrequency ablation cathet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/12
CPCA61B18/1492A61B2018/00083A61B2018/00214A61B2018/00267A61B2018/00577A61B2018/00821A61B2018/00916A61B2018/1467
Inventor 董永华沈美君吉亮施政民
Owner SHANGHAI GOLDEN LEAF MED TEC
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