Methods and apparatus for buffering parenteral solutions
First Claim
1. A method for buffering an anesthetic cartridge, said method comprising:
- providing a buffer cartridge having a septum and a plunger;
providing a first anesthetic cartridge having a septum and a plunger;
attaching the buffer cartridge to one end of a cartridge connector so that a first end of a transfer needle penetrates the septum of the buffer cartridge;
attaching the first anesthetic cartridge to another end of the cartridge connector so that a second end of the transfer needle and a first end of an exhaust needle penetrate the septum of the anesthetic cartridge, wherein a second end of said exhaust needle opens to a sealed interior waste chamber in the cartridge connector; and
advancing the plunger on the buffer cartridge to transfer a volume of buffer from the buffer cartridge into the anesthetic cartridge and a volume of anesthetic from the anesthetic cartridge into the sealed interior waste chamber.
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Accused Products
Abstract
A system for transferring solutions from a first cartridge into a second cartridge comprises a cartridge holder, a plunger driver, and a cartridge connector. The cartridge connector carries a transfer needle and an exhaust needle. The cartridge holder positions the first cartridge against the cartridge connector so that the transfer needle penetrates the first cartridge septum. The second cartridge is removably inserted into another end of the cartridge connector so that both the transfer needle and the exhaust needle penetrate the second cartridge septum. The plunger driver is disposed to advance a plunger on the first cartridge to transfer solution from the first cartridge into the second cartridge thus displacing solution from the second cartridge through the exhaust needle. The cartridge connector includes a sealed interior waste chamber for receiving the solution from the second cartridge.
54 Citations
23 Claims
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1. A method for buffering an anesthetic cartridge, said method comprising:
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providing a buffer cartridge having a septum and a plunger; providing a first anesthetic cartridge having a septum and a plunger; attaching the buffer cartridge to one end of a cartridge connector so that a first end of a transfer needle penetrates the septum of the buffer cartridge; attaching the first anesthetic cartridge to another end of the cartridge connector so that a second end of the transfer needle and a first end of an exhaust needle penetrate the septum of the anesthetic cartridge, wherein a second end of said exhaust needle opens to a sealed interior waste chamber in the cartridge connector; and advancing the plunger on the buffer cartridge to transfer a volume of buffer from the buffer cartridge into the anesthetic cartridge and a volume of anesthetic from the anesthetic cartridge into the sealed interior waste chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for transferring a volume of a solution from a first cartridge having a septum to another solution in a second cartridge having a septum, said device comprising:
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a cartridge holder having a proximal end, a distal end, and a chamber for removably holding the first cartridge; a plunger driver attachable to the proximal end of the cartridge holder and having a piston rod which engages a plunger on the first cartridge; and a cartridge connector having a proximal end attachable to the distal end of the cartridge holder, a distal end adapted to engage a septum end of the second cartridge, and a sealed interior waste chamber, said cartridge connector including a transfer needle and an exhaust needle which extend distally to penetrate the septum end of the second cartridge, wherein the transfer needle extends proximally to penetrate the septum of the first cartridge and the exhaust needle terminates in the sealed interior waste chamber. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A cartridge connector for providing fluid transfer paths between a first cartridge having a septum and a second cartridge having a septum, said cartridge connector comprising:
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a body having a first end, a second end and a sealed interior waste chamber; a transfer needle having a first end exposed at the first end of the body and a second end exposed at the second end of the body, wherein both the first and second ends of the transfer needle are capable of penetrating a cartridge septum; and an exhaust needle having a first end exposed at the first end of the body and a second end terminating in the sealed interior waste chamber, wherein the first end of the exhaust needle is capable of penetrating a cartridge septum. - View Dependent Claims (20, 21, 22, 23)
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Specification