Aspiration and refill kit for a medication infusion pump

A syringe assembly for use in aspirating and refilling a medication reservoir of an implanted medication infusion pump, said syringe assembly comprising:

• a hollow syringe barrel having a first connector fitting at a nose end thereof and defining a barrel port for intake and discharge of fluid from the interior of said barrel, said barrel further defining an open rear end;
• a syringe plunger having a piston slideably received into said barrel rear end, and a plunger stem connected to said piston and projecting outwardly from said barrel rear end;
• a control valve having a second connector fitting which is removably mounted onto said first connector fitting, said control valve including means for selectively opening and closing said valve;
• said plunger being movable within said barrel between an advanced position to a retracted position with said control valve closed to draw a substantial vacuum within said syringe barrel;
• and
• lock means cooperating between said barrel and plunger for retaining said plunger in said retracted position in which longitudinal movement of said plunger is completely inhibited.

A kit for aspirating residual medication from a medication reservoir within an implantable medication infusion pump having an inlet port including a self-sealing septum, said kit comprising:

• a syringe including a hollow syringe barrel having a connector fitting at a nose end thereof and defining a barrel port for intake and discharge of fluid from the interior of said barrel, said barrel further defining an open rear end, said syringe further including a syringe younger having a piston slideably received into said barrel rear end, and a plunger stem connected to said piston and projecting outwardly from said barrel rear end;
• a control valve removably mounted onto said connector fitting, said control valve including means for selectively opening and closing said valve, said plunger being movable within said barrel between an advanced position to a retracted position with said control valve closed to draw a substantial vacuum within said syringe barrel;
• lock means cooperating between said barrel and plunger for retaining said plunger in said retracted position in which longitudinal movement of said plunger is completely inhibited;
• and
• an aspiration needle adapted for mounting onto said control valve and for piercing the pump septum to access the pump reservoir, said means for opening and closing said control valve being movable to open said control valve, thereby communicating the vacuum within said syringe barrel with the pump reservoir to aspirate residual medication within the reservoir into said syringe barrel.

A kit for refilling a medication reservoir within an implantable medication infusion pump having an inlet port including a self-sealing septum, said kit comprising:

• a syringe including a hollow syringe barrel having a connector fitting at a nose end thereof and defining a barrel port for intake and discharge of fluid from the interior of said barrel, said barrel further defining an open rear end, said syringe further including a syringe plunger having a piston slideably received into said barrel rear end, and a plunger stem connected to said piston and projecting outwardly from said barrel rear end;
• a control valve removably mounted onto said connector fitting, said control valve including means for selectively opening and closing said valve, said plunger being movable within said syringe barrel with said control valve open to draw in a quantity of a selected medication to partially fill said barrel, said plunger being further movable within said barrel with said control valve closed and in a direction toward a retracted position to draw a substantial vacuum within said syringe barrel to degree the medication therein;
• lock means cooperating between said barrel and plunger for retaining said plunger in said retracted position during degassing of the medication, said lock means completely inhibiting longitudinal movement of said plunger;
• and
• a refill needle adapted for mounting onto said control valve and for piercing the pump septum to access the pump reservoir, said means for opening and closing said control valve being movable to open said control valve thereby communicating the interior of said syringe barrel with the pump reservoir to permit refilling of the pump reservoir with said selected medication.

A kit for aspirating and refilling an internal medication reservoir of an implantable medication infusion pump having an inlet port including a self-sealing septum, said kit comprising:

• a first syringe assembly comprising:
• a hollow syringe barrel having a connector fitting at a nose end thereof and defining a barrel port for intake and discharge of fluid from the interior of said barrel, said barrel further defining an open rear end;
• a syringe plunger having a piston slideably received into said barrel rear end, and a plunger stem connected to said piston and projecting outwardly from said barrel rear end;
• a control valve removably mounted onto said connector fitting, said control valve including means for selectively opening and closing said valve, said plunger being movable within said barrel between an advanced position to a retracted position with said control valve closed to draw a substantial vacuum within said syringe barrel;
• lock means cooperating between said barrel and plunger for retaining said plunger in said retracted position;
• and
• an aspiration needle adapted for mounting onto said control valve and for piercing the pump septum to access the pump reservoir, said means for opening and closing said control valve being movable to open said control valve thereby communicating the vacuum within said syringe barrel with the pump reservoir to aspirate residual medication within the reservoir into said syringe barrel;
• a guide needle adapted for insertion at least partially into said pump inlet port without piercing said pump septum, said aspiration needle being sized to fit slideably through said guide needle to pierce said pump septum;
• and
• a second syringe assembly comprising:
• a hollow syringe barrel having a connector fitting at a nose end thereof and defining a barrel port for intake and discharge of fluid from the interior of said barrel, said barrel further defining an open rear end;
• a syringe plunger having a piston slideably received into said barrel rear end, and a plunger stem connected to said piston and projecting outwardly from said barrel rear end;
• a control valve removably mounted onto said connector fitting, said control valve including means for selectively opening and closing said valve, said plunger being movable within said syringe barrel with said control valve open to draw in a quantity of a selected medication to partially fill said barrel, said plunger being further movable within said barrel with said control valve closed and in a direction toward a retracted position to draw a substantial vacuum within said syringe barrel to degas the medication therein;
• lock means cooperating between said barrel and plunger for retaining said plunger in said retracted position during degassing of the medication;
• and
• a refill needle adapted for mounting onto said control valve and for piercing the pump septum to access the pump reservoir, said means for opening and closing said control valve being movable to open said control valve, thereby communicating the interior of said syringe barrel with the pump reservoir to permit refilling of the pump reservoir with said selected medication, said refill needle being sized to fit slideably through said guide needle to pierce said pump septum.