Catheter assembly and catheter system
AssigneeTerumo Kabushiki Kaisha
InventorShota TSUMAKI
Life of this patent
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Abstract
A catheter assembly includes: a tubular catheter shaft; and an inner needle inserted into a lumen of the catheter shaft, the inner needle including an insertion distal end surrounded by a catheter distal end which is a distal end of the catheter shaft in an initial state of the catheter assembly in which the inner needle is inserted into the lumen of the catheter shaft. A wavelength conversion member is included in at least one of the catheter distal end or the insertion distal end, the wavelength conversion member including a wavelength conversion material that converts near-infrared light into visible light.
Claims10
A catheter assembly comprising:
- a tubular catheter shaft;
- and
- an inner needle inserted into a lumen of the catheter shaft, the inner needle comprising an insertion distal end surrounded by a catheter distal end which is a distal end of the catheter shaft in an initial state of the catheter assembly in which the inner needle is inserted into the lumen of the catheter shaft, wherein:
- a wavelength conversion member is included in at least one of the catheter distal end or the insertion distal end, the wavelength conversion member comprising a wavelength conversion material that converts near-infrared light into visible light.
A catheter system comprising:
- a catheter assembly comprising:
- a tubular catheter shaft, and
- an inner needle inserted into a lumen of the catheter shaft, the inner needle comprising an insertion distal end surrounded by a catheter distal end which is a distal end of the catheter shaft in an initial state of the catheter assembly in which the inner needle is inserted into the lumen of the catheter shaft, wherein:
- a wavelength conversion member is included in at least one of the catheter distal end or the insertion distal end, the wavelength conversion member comprising a wavelength conversion material that converts near-infrared light into visible light;
- and
- an irradiation unit for emitting the near-infrared light.
A method for puncturing a blood vessel, the method comprising:
- providing a catheter assembly comprising:
- a tubular catheter shaft, and
- an inner needle inserted into a lumen of the catheter shaft, the inner needle comprising an insertion distal end surrounded by a catheter distal end which is a distal end of the catheter shaft in an initial state of the catheter assembly in which the inner needle is inserted into the lumen of the catheter shaft, wherein:
- a wavelength conversion member is included in at least one of the catheter distal end or the insertion distal end, the wavelength conversion member comprising a wavelength conversion material that converts near-infrared light into visible light;
- puncturing a target site with the catheter assembly in the initial state;
- irradiating the target site with the near-infrared light, such that the wavelength conversion member emits the visible light;
- and
- determining that the catheter is not located in the blood vessel by visually recognizing the visible light generated from the wavelength conversion member;
- and
- determining that the catheter distal end is located in the blood vessel by visually recognizing that the visible light generated from the wavelength conversion member disappears.
Dependencies are inferred from the claim text.