Microaccess Kit Comprising A Tapered Needle
AssigneeTerumo Medical Corporation
InventorsYasutake Yamada, Linda E. Trask
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Abstract
The present technology is directed to introducer needle assemblies comprising a tapered needle; as well as to kits comprising a tapered needle, a guidewire and a dilator and sheath; as well as to methods of introducing a dilator to the interior of a patient's body as part of an interventional procedure.
Claims27
An introducer needle assembly comprising a needle with a hollow lumen therethrough, the needle comprising a proximal portion having a proximal outer diameter and proximal inner diameter, and a distal portion having a distal outer diameter and a distal inner diameter, the needle being tapered between the proximal portion and the distal portion such that the proximal outer diameter is greater than the distal outer diameter.
A hollow needle for accessing the interior of a human, the hollow needle comprising;
- a distal tip for penetrating a site on skin of said human, a distal portion having an outer diameter and an outer surface and a proximal portion having an outer diameter and an outer surface, the outer diameter of the distal portion is smaller than the outer diameter of the proximal portion, a tapered portion smoothly varying an outer diameter from the outer diameter of the proximal portion to the outer diameter of the distal portion,
- the outer diameter of the proximal portion being greater than the outer diameter of the distal portion.
A method of introducing a dilator to the interior of a patient's body, the method comprising the steps of:
- (a) providing a guide wire comprising an elongated body and an outer diameter;
- (b) providing a hollow needle comprising a distal portion having an outer diameter and an inner diameter and a proximal portion having an outer diameter and an inner diameter, the outer diameter of the proximal portion being greater than the outer diameter of the distal portion, the inner diameter of the distal portion and the inner diameter of the proximal portion being greater than the outer diameter of the guide wire;
- (c) providing an introducer, the introducer comprising a sheath including a body, a distal portion, a distal tip and a lumen therethrough and a dilator including a body, a distal tapered portion, a distal tip and a lumen therethrough;
- the lumen of the dilator having an inner diameter greater than the outer diameter of the guide wire, the sheath being removably engaged to the dilator and the distal tapered portion of the dilator projecting from the distal tip of the sheath, the distal tip of the dilator having an outer diameter smaller than the outer diameter of the proximal portion of the hollow needle;
- (d) inserting the hollow needle through a site on a skin so as to make a hole in the skin;
- (e) placing the guide wire through the hollow needle and into an interior lumen;
- (f) removing the hollow needle while leaving the guide wire in place;
- (g) advancing the introducer over the guide wire through the lumen of the dilator and into the interior lumen so that the distal tapered portion of the dilator can easily insert and expand the hole made by the hollow needle;
- and,
- (h) removing the dilator and the guide wire, leaving the sheath inserted into the hole through its distal tip.
A kit for accessing the interior of a human, the kit comprising:
- a guide wire comprising an elongated body and an outer diameter;
- a hollow needle comprising a distal portion having an outer diameter and an inner diameter and a proximal portion having an outer diameter and an inner diameter, the outer diameter of the proximal portion is greater than the outer diameter of the distal portion, the inner diameter of the distal portion and the inner diameter of the proximal portion are greater than the outer diameter of the guide wire;
- and
- an introducer comprising a sheath including a body, a distal portion, a distal tip and a lumen therethrough and a dilator including a body, a distal tapered portion, a distal tip and a lumen therethrough, the lumen of the dilator having an inner diameter greater than the outer diameter of the guide wire, the sheath removably engaged the dilator and projected the distal tapered portion of the dilator from the distal tip of the sheath, the distal tip of the dilator having an outer diameter smaller than the outer diameter of the proximal portion of the hollow needle.
A kit for an interventional procedure, the kit comprising:
- (a) a hollow needle having a proximal portion and a distal portion, wherein the hollow needle tapered from its proximal portion to its distal portion;
- (b) a guide wire;
- and
- (c) an introducer comprising a dilator and a sheath removably engaged to the dilator.
Dependencies are inferred from the claim text.