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US 12,213,729 B2Granted
Catheter and recanalization catheter system
AssigneeAsahi Intecc Co., Ltd.
InventorsOsamu Katoh, Wayne Ogata, Yukiko Hase, Kensuke Sakata, Takayuki Hori
Life of this patent
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Abstract
A catheter comprises a shaft, an extended shaft portion, and an electrode disposed on an outer circumferential surface of the shaft. The shaft has a first lumen and a second lumen that is arranged adjacent to the first lumen. The extended shaft portion is provided on a distal end portion of the shaft, has the first lumen, and has a distal end portion located on a distal end side of a distal end portion of the second lumen, in the shaft.
Claims20
A catheter comprising:
- an outer shaft;
- a first inner shaft having a first lumen;
- a second inner shaft having a second lumen arranged adjacent to the first lumen in a radial direction of the outer shaft,
- a plasma guide wire configured to be inserted into the second lumen and slidably disposed therein, and including a distal-end tip made of a metal material having electrical conductivity;
- wherein
- an extended shaft portion of the first inner shaft that is provided on a distal end side of a distal end face of the outer shaft extends in a longitudinal direction of the first inner shaft, the extended shaft portion including (i) the first lumen and (ii) a distal end portion located on a distal end side of a distal end portion of the second lumen;
- and
- an electrode disposed on an outer circumferential surface of the outer shaft, wherein
- the electrode generates plasma between the electrode and the distal-end tip of the plasma guide wire, and
- the surface area of the electrode is larger than the surface area of the distal-end tip of the plasma guide wire.
7 more elements
A catheter comprising:
- a shaft having a first lumen and a second lumen arranged adjacent to the first lumen in a radial direction of the shaft;
- an extended shaft portion that is provided on a distal end portion of the shaft and extends in a longitudinal direction of the shaft, the extended shaft portion having the first lumen and a distal end portion located on a distal end side of a distal end portion of the second lumen in the shaft;
- a plasma guide wire configured to be inserted into the second lumen and slidably disposed therein, and including a distal-end tip made of a metal material having electrical conductivity;
- and
- an electrode disposed on an outer circumferential surface of the shaft, wherein
- the electrode is located on a proximal end side of the extended shaft portion and generates plasma between the electrode and a distal end portion of the plasma guide wire, and
- the surface area of the electrode is larger than the surface area of the distal-end tip of the plasma guide wire.
4 more elements
A catheter comprising:
- a shaft having a first lumen and a second lumen arranged adjacent to the first lumen in a radial direction of the shaft, the shaft having an opening that is provided at a distal end of the shaft and communicates with the second lumen;
- an extended shaft portion that is provided on a distal end portion of the shaft and extends in a longitudinal direction of the shaft, the extended shaft portion having the first lumen and a distal end portion located on a distal end side of a distal end portion of the second lumen in the shaft;
- and
- an electrode located on a proximal end side of the extended shaft portion and disposed on an outer circumferential surface of the shaft, wherein
- the second lumen is configured such that a plasma guide wire is inserted into the second lumen and protrudes from the opening of the shaft,
- the first lumen of the extended shaft portion is configured such that a sensor is slidably movable in the first lumen of the extended shaft portion to obtain information for generation of an image of biological tissue of a target site, and
- the plasma guide wire includes a distal-end tip made of a metal material having electrical conductivity to generate plasma between the electrode and the distal-end tip to cause ablation of the target site.
4 more elements
Dependencies are inferred from the claim text.