Recondition process for a medication infusion pump
First Claim
1. A method of reconditioning a medication infusion pump having a medication chamber for receiving and storing a supply of a selected medication, and a pump mechanism for delivering the medication in doses from the medication chamber to a patient, said reconditioning method comprising the steps of:
- placing a selected buffer solution into the medication chamber;
operating the pump mechanism to draw a portion of the buffer solution from the medication chamber in an amount sufficient to substantially fill internal flow passages of the pump mechanism with the buffer solution;
placing a selected rinse solution into the medication chamber; and
operating the pump mechanism to draw a portion of the rinse solution from the medication chamber and into internal flow passages of the pump mechanism, whereby the rinse solution effectively contacts and cleans internal flow passage surfaces of the pump mechanism and then intermixes within the pump mechanism with the buffer solution for neutralization thereof.
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Accused Products
Abstract
A method is provided for reconditioning a medication infusion pump by removal of accumulated medication deposits and the like to restore pump performance without requiring surgical removal of an implanted pump from a patient. The reconditioning process comprises sequential delivery of a buffer solution and a rinse solution to internal pump flow passages. The rinse solution is effective to dissolve medication deposits and the like within narrow pump flow passages before the rinse solution is neutralized by intermixing with the buffer solution. Dissolution of accumulated medication deposits results in restoration of pump performance substantially to original product specifications.
239 Citations
23 Claims
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1. A method of reconditioning a medication infusion pump having a medication chamber for receiving and storing a supply of a selected medication, and a pump mechanism for delivering the medication in doses from the medication chamber to a patient, said reconditioning method comprising the steps of:
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placing a selected buffer solution into the medication chamber; operating the pump mechanism to draw a portion of the buffer solution from the medication chamber in an amount sufficient to substantially fill internal flow passages of the pump mechanism with the buffer solution; placing a selected rinse solution into the medication chamber; and operating the pump mechanism to draw a portion of the rinse solution from the medication chamber and into internal flow passages of the pump mechanism, whereby the rinse solution effectively contacts and cleans internal flow passage surfaces of the pump mechanism and then intermixes within the pump mechanism with the buffer solution for neutralization thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. In a medication infusion pump having a medication chamber for receiving and storing a selected medication, and a pump mechanism operable to draw the medication in doses from the medication chamber and to deliver the medication to a patient, a reconditioning method for cleaning medication deposits from internal flow passages of the pump mechanism, said method comprising the steps of:
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placing a selected buffer solution into the medication chamber; operating the pump mechanism to draw a sufficient quantity of the buffer solution from the medication chamber and into the pump mechanism to substantially fill the internal flow passages of the pump mechanism with the buffer solution; removing residual buffer solution from the medication chamber; placing a selected rinse solution into the medication chamber; operating the pump mechanism to draw sufficient quantity of the rinse solution from the medication chamber to contact selected internal flow passage-defining surfaces of the pump mechanism to remove medication deposits from said selected internal surfaces, and in a quantity sufficiently less than the volumetric capacity of the pump mechanism internal flow passages whereby the rinse solution contacts and is substantially neutralized by buffer solution within the pump mechanism; and removing residual rinse solution form the medication chamber. - View Dependent Claims (21, 22, 23)
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Specification