Medical device
AssigneeAsahi Intecc Co., Ltd.
InventorsRio SUGITA, Masakazu NAKADA, Makoto NISHIGISHI, Soichiro FUJIWARA
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Abstract
A medical device includes a core, a cylindrical body disposed on the outer side of the core. A hydrophilic coat layer including a first coating material disposed on an outer peripheral surface of the cylindrical body, and a hydrophobic coat layer including a second coating material disposed on a radially outward side of the hydrophilic coat layer. The hydrophilic coat layer is configured to absorb liquid. The hydrophilic coat layer may be configured to swell and be exposed on an outer surface of the hydrophobic coat layer in a presence of a liquid.
Claims20
A medical device comprising:
- a core;
- a cylindrical body disposed on an outer side of the core;
- a hydrophilic coat layer including a first coating material and disposed on an outer side of the cylindrical body;
- and
- a hydrophobic coat layer including a second coating material and disposed on an outer side of the hydrophilic coat layer,
- wherein the hydrophilic coat layer is configured to absorb liquid.
A method of operating a medical device, the method comprising:
- providing a medical device including a core, a cylindrical body disposed on the core, a hydrophilic layer disposed on the cylindrical body, and a hydrophobic layer disposed on the hydrophilic layer;
- inserting the medical device into a body lumen containing liquid;
- passing the liquid through the hydrophobic layer to the hydrophilic layer;
- and
- expanding the hydrophilic layer through the hydrophobic layer to an outer surface of the medical device.
A medical device comprising:
- a core;
- a tube disposed around the core member;
- and
- a friction-reducing coating structure disposed on the tube, the friction-reducing coating structure including:
- a hydrophilic layer configured to swell upon contact with a liquid;
- and
- a hydrophobic layer over the hydrophilic layer, the hydrophobic layer including a gap configured to permit passage of the liquid to the hydrophilic layer and to permit the hydrophilic layer to protrude through the hydrophobic layer when swollen.
Dependencies are inferred from the claim text.