Implantable therapeutic substance delivery system with catheter access port control and method of use
First Claim
1. A human implantable liquid therapeutic substance delivery system comprising:
- a delivery device including;
a housing defining a discharge outlet;
a reservoir maintained by the housing for containing the therapeutic substance;
an access port assembly fluidly connected to the discharge outlet via a fluid pathway;
a flow restrictor mechanism fluidly connected between the discharge outlet and the access port assembly so as to establish, relative to the discharge outlet, an outflow fluid flow direction and an inflow fluid flow direction, the flow restriction mechanism configured to have flow restriction characteristics in the outflow direction that differ from flow restriction characteristics in the inflow direction; and
a refill port assembly apart from the access port assembly and fluidly connected to the reservoir.
1 Assignment
0 Petitions
Accused Products
Abstract
A drug pump including a housing, reservoir, access port, flow restrictor mechanism, and refill port. The housing defines a discharge outlet, and maintains the reservoir in fluid communication with the refill port. The access port is fluidly connected to the discharge outlet. The flow restrictor mechanism is fluidly connected between the discharge outlet and the access port, positioned to establish outflow and inflow directions. The flow restrictor mechanism has flow restriction characteristics in the outflow direction that differ from flow restriction characteristics in the inflow direction. The flow restrictor mechanism partially restricts fluid flow in the outflow direction such that a clinician can sense a difference between an available injection rate through the access port as compared to through the refill port. Further, the flow restrictor mechanism does not overtly impede fluid withdrawal procedures via the access port.
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Citations
23 Claims
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1. A human implantable liquid therapeutic substance delivery system comprising:
a delivery device including;
a housing defining a discharge outlet;
a reservoir maintained by the housing for containing the therapeutic substance;
an access port assembly fluidly connected to the discharge outlet via a fluid pathway;
a flow restrictor mechanism fluidly connected between the discharge outlet and the access port assembly so as to establish, relative to the discharge outlet, an outflow fluid flow direction and an inflow fluid flow direction, the flow restriction mechanism configured to have flow restriction characteristics in the outflow direction that differ from flow restriction characteristics in the inflow direction; and
a refill port assembly apart from the access port assembly and fluidly connected to the reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of percutaneously performing a liquid substance exchange with an implantable therapeutic substance delivery device including a housing maintaining a reservoir for containing the therapeutic substance, a refill port assembly fluidly connected to the reservoir, and an access port assembly fluidly connected to a discharge port, the method comprising:
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providing a flow restrictor mechanism fluidly connected between the access port assembly and the discharge outlet, the flow restrictor mechanism adapted to present a restriction to fluid flow from the access port assembly to the discharge port;
providing a liquid supply assembly including a needle fluidly connected to a supply of liquid, the needle terminating in a needle tip;
percutaneously delivering the needle tip through a septum associated with one of the refill port assembly and the access port assembly;
initiating injection of liquid through the needle;
determining whether the needle tip is disposed within the refill port assembly or the access port assembly based upon a sensed resistance to fluid flow through the needle tip while injecting the liquid through the needle; and
determining whether to move the needle tip from the port assembly within which the needle tip is currently positioned based upon the sensed resistance to fluid flow. - View Dependent Claims (16, 17, 18)
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19. A human implantable therapeutic substance delivery system comprising:
a delivery device including;
a housing defining a discharge outlet;
a reservoir maintained by the housing for containing the therapeutic substance;
an access port assembly fluidly connected to the discharge outlet via fluid pathway;
a refill port assembly apart from the access port assembly and fluidly connected to the reservoir; and
flow restriction means for partially restricting a rate of fluid flow across the fluid pathway at least in a direction from the access port assembly to the discharge outlet, the flow restriction means adapted to permit fluid flow from the discharge outlet to the access port assembly. - View Dependent Claims (20, 21, 22, 23)
Specification