Parenteral fluid medication reservoir pump

• US 5,368,588 A
• Filed: 02/26/1993
• Issued: 11/29/1994
• Est. Priority Date: 02/26/1993
• Status: Expired due to Term

• Current Assignee: David S. Bettinger
• Original Assignee: David S. Bettinger
• Inventors: Bettinger, David S.
• Primary Examiner(s): WEISS, JOHN
• Application Number:
  US08/023,130
• Time in Patent Office: 641 Days
• Field of Search: 604/132, 604/131, 604/892.1, 604/891.1, 604/890.1, 424/420, 424/421, 424/423, 424/424, 424/425, 222/386.5
• US Class Current: 604/891.1
• CPC Class Codes: A61K 9/0024 Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue compositions for intravenous administration, normal injectable solutions or dispersions for, e.g. subcutaneous administration A61K9/0019; brain implants A61K9/0085; (coated) prostheses, catheters or stents A61L
• CPC Class Codes: A61M 31/002 Devices for releasing a drug at a continuous and controlled rate for a prolonged period of time artificial gland structures or devices A61F2/022; intra-uterine contraceptive devices A61F6/14; tampons for introducing into the vagina A61F13/20, A61L15/00; suppositories or bougies for intra-vaginal or intra-uterine application A61K9/02; physical forms of medicinal preparations for sustained or differential drug release A61K9/20, A61K9/50
• CPC Class Codes: A61M 5/152 pressurised by contraction of elastic reservoirs containers for dispensing contents by contraction of an elastic bag provided therein, in general B65D83/0061

Abstract

A parenteral fluid medication pump comprises a reservoir filled with fluid medication. The medication is continuously discharged over an extended period into the patient. The continuous discharge is obtained by a shrink polymer wall for the reservoir which is powered by the relaxation of forces which are internal to the shrink polymer. In the principal embodiment the device pumps from a reservoir which is surgically implanted and internal to the patient. A reservoir depletion warning for surgically implanted pumps which creates a physiological indicator is also taught. In other embodiments the device is capable of magnetic, external-triggered disablement.

Claims

1. A disposable parenteral fluid medication pump comprising an elongated reservoir having an enclosing wall;

said reservoir having at least one closable outlet through which a flowable fluid is induced to administer a medication; and

wherein said wall is made of shrink polymer material which when activated results in a reduction in the interior volume of said reservoir forcing said flowable fluid through said outlet; and

wherein said shrink polymer material is activated by heat, aging, light, chemical agent, oxygen, or a combination.

2. The pump of claim 1 wherein the pump is made of age activated, shrink polymers which are bio-compatible with surgical implantation in a patient for such periods as are required for complete dispensing of medication.

3. The pump of claim 1 wherein the reservoir outlet is mounted in communication with a means for continuous administering medication by attaching a hollow tube to said outlet for site-targeting and multi-drug sequencing.

4. The implant pump of claim 2 wherein said pump has a disabling device comprising a plug having a magnetic core.

5. The pump of claim 1 wherein the reservoir is charged by the insertion of a container, prefilled with the medication to be administered.

6. The pump of claim 1 wherein the opposing internal walls in the post dispensing state are adjacent and parallel to minimize residual undispensed charge.

7. A disposable parenteral fluid medication pump comprising an elongated reservoir of small diameter having an enclosing wall;

said reservoir having at least one closable outlet through which a plurality of medications are induced in a linear sequence to achieve a preprogrammed regimen; and

wherein said reservoir wall is made of shrink polymer material which when activated results in a reduction in the interior volume of said reservoir forcing said medications through said outlet; and

wherein said shrink polymer material is activated by heat, aging, light, chemical agent, oxygen, or a combination.