Infusion pump with dual position syringe locator
First Claim
1. In an infusion pump having a pump housing defining a syringe chamber adapted for receiving and supporting a syringe barrel with a piston plunger received therein, wherein the infusion pump includes first means for retaining the syringe barrel in a first position within the syringe chamber, the improvement comprising:
- second means for removable insertion into the syringe chamber for retaining the syringe barrel in a second position within the syringe chamber.
6 Assignments
0 Petitions
Accused Products
Abstract
An improved infusion pump is provided for controlled delivery of medication from a syringe to a patient, wherein a pump housing includes a syringe chamber and associated lock members for receiving and supporting the syringe in one of two different positions. The syringe includes a medication-containing barrel connected to a luer fitting at a nose end thereof by a luer neck of reduced cross sectional size. In one position, the syringe seats into the chamber with the luer neck protruding through an outlet port of mating size and with the luer fitting disposed outside the housing, such that the housing defines a lock member engaged axially between the syringe barrel and luer fitting to secure the barrel against axial displacement. In another position, a retainer key is adapted for installation into the syringe chamber at a position spaced inboard from the outlet port and defines an alternative lock member for axially securing the syringe with the luer fitting disposed inside the housing. In either position, a syringe piston plunger is controllably advanced by the pump into the barrel to deliver medication from the nose end of the syringe for administration to a patient via the luer fitting and infusion tubing or the like connected thereto.
718 Citations
19 Claims
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1. In an infusion pump having a pump housing defining a syringe chamber adapted for receiving and supporting a syringe barrel with a piston plunger received therein, wherein the infusion pump includes first means for retaining the syringe barrel in a first position within the syringe chamber, the improvement comprising:
second means for removable insertion into the syringe chamber for retaining the syringe barrel in a second position within the syringe chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An infusion pump assembly, comprising:
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a syringe having a syringe barrel adapted to receive a selected medication, a piston plunger slidably received into an aft end of said barrel and adapted for advancement into said barrel to dispense the medication through a nose end of the barrel, a luer fitting, and a luer neck of reduced cross sectional size joined between said barrel nose end and said luer fitting; an infusion pump including a pump housing defining an elongated syringe chamber with an outlet port at one end thereof, said syringe being receivable into said chamber syringe in a first position with said luer neck seated within said outlet port such that a portion of said housing defining said outlet port extends into axial engagement between said barrel nose end and said luer fitting to retain said syringe in said first position with said luer fitting disposed at the exterior of said housing; a retainer key for insertion into said chamber at a position spaced inboard from said outlet port; and means for securing said retainer key within said chamber, said syringe being receivable into said chamber in a second position with said luer neck seated within said retainer key such that said retainer key extends into axial engagement between said barrel nose end and said luer fitting to retain said syringe in said second position with said luer fitting disposed within said chamber. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An infusion pump assembly, comprising:
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a syringe having a syringe barrel adapted to receive a selected medication, a piston plunger slidably received into an aft end of said barrel and adapted for advancement into said barrel to dispense the medication through a nose end of the barrel, a luer fitting, and a luer neck of reduced cross sectional size joined between said barrel nose end and said luer fitting; and an infusion pump including a pump housing defining an elongated syringe chamber with an outlet port at one end thereof, said housing defining first means axially engageable between said barrel nose end and said luer fitting for supporting said syringe barrel against axial displacement within the pump chamber, with said luer fitting disposed outside the pump housing; said pump having further including second means adapted for removable seated insertion into the pump chamber and being axially engageable between sid barrel nose end and said luer fitting for supporting said syringe barrel against axial displacement within the pump chamber with said luer fitting disposed inside the pump housing.
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Specification