Implanted medication infusion device
First Claim
1. In an implantable medication infusion device, the combination of, a medication reservoir having a movable wall portion, a pressure stabilizing chamber in communication with said movable wall portion and filled with a fluid having a pressure which is greater than the pressure of the body in which said device is implanted, a solenoid operated pulsatile pumping unit having an inlet communicating with said reservoir through an inlet valve;
- and a flow restrictor positioned between said pumping unit and a catheter outlet, said flow restrictor permitting; and
continuous flow of medication to said catheter outlet at a safe value rate in the event said inlet valve remains open.
2 Assignments
0 Petitions
Accused Products
Abstract
An implantable positive pressure medication infusion device is provided which is programmable over a wide dynamic range and yet the maximum flow of medication into the body, in the event the inlet valve of the device leaks or fails in the valve open position, is limited to a safe value which is much lower than the maximum programmable infusion rate of the device. An auxiliary flow restrictor is also provided which bypasses the programmable pumping unit and assures a minimum flow of medication into the body in the event of failure of the programmable pumping unit or its electronic drive. An arrangement is also provided for detecting catheter clogging or failure of the programmable pumping unit in either a positive or negative pressure device.
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Citations
20 Claims
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1. In an implantable medication infusion device, the combination of, a medication reservoir having a movable wall portion, a pressure stabilizing chamber in communication with said movable wall portion and filled with a fluid having a pressure which is greater than the pressure of the body in which said device is implanted, a solenoid operated pulsatile pumping unit having an inlet communicating with said reservoir through an inlet valve;
- and a flow restrictor positioned between said pumping unit and a catheter outlet, said flow restrictor permitting; and
continuous flow of medication to said catheter outlet at a safe value rate in the event said inlet valve remains open. - View Dependent Claims (2, 3, 4, 9)
- and a flow restrictor positioned between said pumping unit and a catheter outlet, said flow restrictor permitting; and
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5. In an implantable medication infusion device, the combination of, a medication reservoir having a movable wall portion, a pressure stabilizing chamber in communication with said movable wall portion and filled with a fluid having a pressure which is greater than the pressure of the body in which said device is implanted, a solenoid operated pulsatile pumping unit having an inlet communicating with said reservoir through an inlet valve;
- a first flow restrictor positioned between said pumping unit and a catheter outlet, and a second flow restrictor connected across said inlet valve, said second flow restrictor providing a predetermined continuous minimum flow of medication from said reservoir through said second and first flow restrictors to said catheter outlet during periods when said pumping unit is not operating.
- View Dependent Claims (6, 7, 8, 10, 11)
- 12. In an implantable medication infusion device, the combination of a medication reservoir, means for supplying medication from said reservoir to a catheter outlet port, said catheter outlet port including an inwardly extending shoulder, and a quick detachable outlet port connector having a connector body adapted to fit into said catheter outlet port in fluid sealing relation thereto and having a pair of spring arms provided with outwardly extending lug portions on the free ends thereof which are adapted to engage said shoulder and hold said connector securely within said outlet port, said spring arms being inwardly deflectable to disengage said lug portions from said shoulder, thereby to permit said connector to be quickly removed from said outlet port.
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17. In an implantable medication infusion device, the combination of, a medication reservoir having a movable wall portion, a pressure stabilizing chamber in communication with said movable wall portion and filled with a fluid having a pressure which is greater than the pressure of the body in which said device is implanted, a solenoid operated pulsatile pumping unit having an inlet communicating with said reservoir through an inlet valve;
- a first flow restrictor positioned between said pumping unit and a catheter outlet, and a second flow restrictor connected between said reservoir and said catheter outlet, said second flow restrictor providing a predetermined continuous minimum flow of medication from said reservoir to said catheter outlet during periods when said pumping unit is not operating.
- View Dependent Claims (18, 19, 20)
Specification