Prefillable syringes and injectors for use therewith

• US 6,322,535 B1
• Filed: 04/01/1999
• Issued: 11/27/2001
• Est. Priority Date: 11/12/1996
• Status: Expired due to Fees

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Masarik, Robert J., Rhinehart, Edward J., Hitchins, Mark W.
• Primary Examiner(s): Seidel, Richard K.
• Assistant Examiner(s): Thanh, Loan H.
• Application Number:
  US09/282,941
• Time in Patent Office: 971 Days
• Field of Search: 604/131, 604/151, 604/152, 604/181, 604/187, 604/189, 604/220-221, 604/218, 604/232
• US Class Current: 604/154
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump

Abstract

The present invention provides prefillable syringes and injectors for use therewith that expand and/or facilitate a variety of medical procedures involving the injection of a liquid medium. In several embodiments, the present syringes and injectors enable the use of current syringe materials at higher pressures than previously attainable or the use of other materials not previously usable with current high pressure-syringe and injector designs. In one embodiment, a syringe comprises an elongated cylindrical main body having a first pair and a second pair of mounting flanges encompassing collectively an arcuate length equal to at least approximately 180° of the circumference of the rear portion of the cylindrical main body for releasably mounting the syringe in a desired position relative to the front wall of the injector housing. Injectors for use with such syringes comprise a housing having a front wall and a retainer on the front wall which cooperates with the first and second pairs of mounting flanges of the syringe to releasably mount the syringe on the injector.

Claims

1. A syringe for use with an injector having at least two pairs of retaining flanges, the syringe comprising:

a main body defining an axis; and

at least two pairs of mounting flanges operably associated with the main body, a first pair of mounting flanges being positioned in a first plane substantially normal to the axis of the main body and a second pair of mounting flanges being positioned in a second plane substantially normal to the axis of the main body, the at least first and second pairs of mounting flanges being radially offset from one another and cooperable with the at least two pairs of retaining flanges to releasably engage the syringe with the injector.

2. The syringe of claim 1, further comprising a third pair of mounting flanges operably associated with the main body.

3. The syringe of claim 2 wherein the first and second pairs of mounting flanges are radially offset from the third pair of mounting flanges.

4. The syringe of claim 3 wherein the first and second pairs of mounting flanges are radially offset from the third pair of mounting flanges by approximately 90°

.

5. The syringe of claim 1 wherein the mounting flanges of the first pair of mounting flanges are positioned symmetrically about the axis of the main body and the mounting flanges of the second pair of mounting flanges are positioned symmetrically about the axis of the main body.

6. The syringe of claim 1 wherein the mounting flanges of the first pair of mounting flanges are dimensioned differently from the mounting flanges of the second pair of mounting flanges.

7. The syringe of claim 1 wherein the main body is fabricated from a material which is compatible with a liquid medium for extended periods of time.

8. The syringe of claim 1 wherein the main body is fabricated from a substantially clear material.

9. The syringe of claim 1 wherein the first pair of mounting flanges are radially offset from the second pair of mounting flanges by approximately 90°

.