Presure controlled system for filling an implantable drug infusion pump
First Claim
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1. A pressure controlled system for filling a drug infusion pump, comprising:
- a filling syringe;
a pressure control valve coupled to said filling syringe and being in fluid communication therewith;
said pressure control valve being adapted to couple to said drug infusion pump and comprising;
a valve body;
a flow passage extending through said valve body;
a flexible membrane disposed within said valve body;
said flexible membrane having a surface in fluid communication with said flow passage;
said flexible membrane being operable to expand and contract in response to pressure in said flow passage;
a mandrel coupled to said flexible membrane;
said mandrel having a first open position and a second closed position;
said mandrel being operable to move to said closed position to close said flow passage when said flexible membrane is expanded a preselected amount; and
a biasing member being operable to bias said mandrel toward said open position.
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Accused Products
Abstract
An implantable drug infusion pump filling system includes a filling syringe, a pressure control valve, a filling tube, and an implantable drug infusion pump. The pressure of the drug or agent loaded into the pump is prevented from exceeding a selected maximum pressure by the pressure control valve. The pressure control valve comprises a valve body that has an inlet passage coupled to the filling syringe, an internal chamber, and a discharge passage coupled to the pump. The inlet passage, the internal chamber, and the discharge passage form a flow passage for the flow of the drug. A mandrel is slidably disposed in the valve body. The mandrel is coupled to a flexible membrane, which is, in turn, coupled to a biasing member. When the pressure of the drug or agent acting on the flexible membrane exceeds the spring constant of the biasing member, the mandrel moves to a closed position, shutting off the flow passage.
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Citations
13 Claims
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1. A pressure controlled system for filling a drug infusion pump, comprising:
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a filling syringe; a pressure control valve coupled to said filling syringe and being in fluid communication therewith;
said pressure control valve being adapted to couple to said drug infusion pump and comprising;a valve body; a flow passage extending through said valve body; a flexible membrane disposed within said valve body;
said flexible membrane having a surface in fluid communication with said flow passage;
said flexible membrane being operable to expand and contract in response to pressure in said flow passage;a mandrel coupled to said flexible membrane;
said mandrel having a first open position and a second closed position;
said mandrel being operable to move to said closed position to close said flow passage when said flexible membrane is expanded a preselected amount; anda biasing member being operable to bias said mandrel toward said open position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A pressure controlled drug infusion pump filling system, comprising:
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an infusion pump; a filling syringe; a pressure control valve coupled to said filling syringe and to said pump, said pressure control valve being in fluid communication with said pump and with said filling syringe;
said pressure control valve comprising;a valve body; a flow passage extending through said valve body; a flexible membrane disposed within said valve body;
said flexible membrane having a surface in fluid communication with said flow passage;
said flexible membrane being operable to expand and contract in response to pressure in said flow passage;a mandrel coupled to said flexible membrane;
said mandrel having a first open position and a second closed position;
said mandrel being operable to move to said closed position to close said flow passage when said flexible membrane is expanded a preselected amount; anda biasing member being operable to bias said mandrel toward said open position. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of filling a drug infusion pump with a fluid while preventing over-pressurization of said pump, comprising the steps of:
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coupling a filling syringe containing a preselected amount of said fluid to the inlet of a pressure regulating valve; coupling the outlet of said pressure regulating valve to a hypodermic needle; inserting said hypodermic needle into said pump; and actuating said filling syringe to pass fluid through said pressure regulating valve and into said pump until the pressure of said fluid passing through said pressure regulating valve achieves a preselected maximum at which time said pressure regulating valve closes to prevent further flow of fluid into said pump.
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Specification
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Current AssigneeMedtronic Incorporated (Medtronic Plc)
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Original AssigneeMedtronic Incorporated (Medtronic Plc)
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InventorsHeruth, Kenneth T., Shoberg, Bret R.
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Primary Examiner(s)Recla, Henry J.
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Assistant Examiner(s)Douglas, Steven O.
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Application NumberUS08/422,362Time in Patent Office621 DaysField of Search141/21, 141/25, 141/26, 141/27, 141/98, 141/192, 137/505.38, 137/505.44, 604/65, 604/67, 604/82, 604/236, 604/237, 604/246, 604/247US Class Current141/21CPC Class CodesA61M 2209/04 Tools for specific apparatusA61M 2209/045 for filling, e.g. for filli...A61M 5/14276 specially adapted for impla...
