Graft-port hemodialysis systems, devices, and methods
First Claim
1. An implantable port device for establishing access to a blood vessel of a patient, the device comprising:
- a tapered seat configured to receive a tip of an access tube, the seat having a proximal portion, a distal portion, and a conical surface extending between the proximal portion and the distal portion;
a guide configured to engage the tip of the access tube and to assist in directing the tip of the access tube toward the seat; and
an interface surface configured to engage (i) the blood vessel of the patient or (ii) a vascular access catheter, the interface surface having an aperture in fluid communication with the distal end of the seat;
wherein the conical surface includes a taper angle having a value within a range from about 0.5 degrees to about 4.0 degrees; and
wherein the proximal portion of the seat is configured to receive the tip of the access tube therethrough.
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Accused Products
Abstract
The present invention relates to subcutaneously implanted graft-port systems, devices and methods for establishing access to the vascular system of a patient requiring multiple blood treatments over an extended period of time. The systems, devices and methods disclosed herein reduce miscannulation, promote intra-session hemostasis, and decrease the incidence of bacteremia and sepsis among other improvements and advantages. The devices include a port with a flattened plateau-like surface for receiving an access tube. The flat surface may include a tactile or visual guide to assist with placement of the access tube into the tapered seat. Optional valve mechanisms reduce the size and form factor of the implantable graft-port device and seals the conduit of the port closed to physiologic pressures until the valve is opened upon percutaneous insertion of the access tube. The access tube does not pass into the conduit. A mismatch fit between the access tube and tapered seat causes a decrease in the cross-sectional sealing area, a reduction in the overall device size, and an increase in blood flow during treatment. Lock solutions to prevent fowling and infection are also disclosed.
84 Citations
20 Claims
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1. An implantable port device for establishing access to a blood vessel of a patient, the device comprising:
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a tapered seat configured to receive a tip of an access tube, the seat having a proximal portion, a distal portion, and a conical surface extending between the proximal portion and the distal portion; a guide configured to engage the tip of the access tube and to assist in directing the tip of the access tube toward the seat; and an interface surface configured to engage (i) the blood vessel of the patient or (ii) a vascular access catheter, the interface surface having an aperture in fluid communication with the distal end of the seat; wherein the conical surface includes a taper angle having a value within a range from about 0.5 degrees to about 4.0 degrees; and wherein the proximal portion of the seat is configured to receive the tip of the access tube therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A subcutaneously implanted graft-port device used to establish access to a blood vessel of a patient, the patient requiring repeated vascular access over a period of time, the device comprising:
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a housing having an inlet opening, an outlet opening and an interior conduit defined therein between, the conduit configured to accept a vascular blood flow;
wherein the housing includes a flat surface, the flat surface oriented nearest to and substantially parallel with a skin of the patient when the device is subcutaneously implanted;a guide located on the flat surface; a tapered seat located in the center of the flat surface;
wherein the tapered seat includes an outer perimeter, an inner perimeter smaller than the outer perimeter, and a conical surface extending between the outer and inner perimeters; and
wherein the tapered seat includes a taper of between about 2.5 degrees to 3.5 degrees from the outer perimeter to the inner perimeter, the tapered seat configured to receive an access tube first through the outer perimeter;a valve mechanism configured to seal the conduit closed to physiologic pressures while allowing the vascular blood flow until the valve is opened via percutaneous insertion of the access tube into the tapered seat by a health care professional;
wherein opening the valve allows continued vascular blood flow through the conduit, the flow unobstructed by the access tube; and
wherein the valve is closed upon removal of the access tube from the tapered seat at a treatment conclusion. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for establishing access to a blood vessel of a patient, the patient requiring repeated vascular access over a period of time, the method comprising:
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subcutaneously implanting a graft-port device, the device comprising; a housing having an inlet opening, an outlet opening and an interior conduit defined therein between, the conduit configured to accept a vascular blood flow;
wherein the housing includes a flat surface, the flat surface oriented nearest to and substantially parallel with a skin of the patient when the device is subcutaneously implanted;a guide located on the flat surface; a tapered seat located in the center of the flat surface;
wherein the tapered seat includes an outer perimeter, an inner perimeter smaller than the outer perimeter, and a conical surface extending between the outer and inner perimeters; and
wherein the tapered seat includes a taper of between about 0.5 degrees to 4.0 degrees from the outer perimeter to the inner perimeter, the tapered seat configured to receive an access tube first through the outer perimeter;a valve mechanism configured to seal the conduit closed to physiologic pressures while allowing the vascular blood flow through the conduit; percutaneously inserting the access tube into the tapered seat of the device to open the valve and allow continued vascular blood flow through the conduit, the flow unobstructed by the access tube; and removing the access tube from the tapered needle seat of the device to close the valve at a treatment conclusion. - View Dependent Claims (17, 18, 19, 20)
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Specification