Injectors and syringe interfaces for syringes of variable size

• US 7,192,417 B2
• Filed: 09/03/2002
• Issued: 03/20/2007
• Est. Priority Date: 09/05/2001
• Status: Expired due to Fees

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Parks, Robert, Reilly, David M., Goodworth, Matthew, Thompson, Jeffrey John, Beale, Matthew, Degentesh, Drew
• Primary Examiner(s): Lucchesi; Nicholas
• Assistant Examiner(s): Ahmed; Aamer S.
• Application Number:
  US10/233,844
• Publication Number:
  US 20030045789A1
• Time in Patent Office: 1,659 Days
• Field of Search: 604/151, 604/131, 604/134, 604/154, 604/155, 604/181, 604/187, 600/432
• 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

A syringe interface for attaching syringes to a drive mechanism which includes a drive member to impart motion to a syringe plunger includes a plurality of syringe mount apertures having different dimensions to attach each of a plurality of syringes to the syringe interface. Each of the syringes for attachment to the syringe interface includes at least one mounting flange, and each of the plurality of syringes has a different mounting flange dimension. Each of the plurality of syringe mount apertures is in general alignment with an axis of the drive member. A syringe drive mechanism includes a syringe interface as described above. The syringe drive mechanism can further include a sensing system to sense which size of the plurality of syringes is mounted on the syringe interface. The syringe drive mechanism can also include a processor and a memory which are in operative communication with the drive member. The memory includes a control program stored therein. The processor is in communication with the sensing system so that the control program controls the drive member according to the syringe sensed to be attached to the syringe interface. A powered injector includes a drive member and a drive to deliver power to the drive member. A processor of the powered injector is in communication with the drive and with a memory in which at least one control program is stored. The control program includes instructions for control of the drive. The powered injector further includes a syringe interface as described above for attaching syringes to the powered injector so that the drive member can impart motion to a plunger slidably positioned within each of the syringes. The powered injector further includes a sensing system to detect which of the syringes is attached to the syringe interface. The sensing system is in communication with the processor so that the control program controls the drive in a manner determined by the syringe detected to be attached to the syringe interface.

Claims

1. A syringe interface for attaching a plurality syringes having different barrel diameters to a drive mechanism including a drive member, each of the syringes including at least one mounting flange, the at least one mounting flange of syringes of different barrel diameters extending radially outward to different extents, the syringe interface including a plurality of syringe mount apertures having different dimensions to attach each of the plurality of syringes to the syringe interface, each syringe mount aperture being positioned at a different axial position on the syringe interface such that the syringe mount apertures having a larger diameter are positioned forward of the syringe mount apertures having a smaller diameter each of the plurality of syringe mount apertures having an axis in general alignment with an axis of the drive member, each of the syringe mount apertures of the syringe interface comprising at least one retaining flange, the retaining flange of each syringe mount aperture projecting radially inward to a different radial position to cooperate with the at least one mounting flange of one of the syringes, each of the retaining flanges of each of the syringe mount apertures being in general alignment about the circumference of the syringe.

2. The syringe interface of claim 1 wherein each syringe mount aperture includes a set of a plurality of retaining flanges, each set of retaining flanges extending radially inwardly to create a unique aperture dimension, each set of the retaining flanges of each of the syringe mount apertures being in general alignment about the circumference of the syringe, each syringe mount aperture further including at least one mounting slot between the retaining flanges to allow passage of each mounting flange on one of the syringes therethrough, each of the mounting slots of each of the syringe mount apertures being in general alignment about the circumference of the syringe, the mounting flanges on the syringe being rotatable relative to the retaining flanges of the syringe mount aperture to be positioned in abutting cooperation with the retaining flanges of the syringe mount aperture.

3. The syringe interface of claim 2 wherein each set of retaining flanges includes two retaining flanges positioned generally opposite of each other, two generally opposing mounting slats being positioned between the retaining flanges of each set of retaining flanges to cooperate with two generally opposing mounting flanges on one of the syringes.

4. The syringe interface of claim 3 wherein at least one of set of retaining flanges is movable in an axial direction relative to another set of retaining flanges.

5. The syringe interface of claim 4 including a first inner set of retaining flanges for cooperation with a first syringe and a second outer set of retaining flanges for cooperation with a second syringe, the second syringe having a diameter larger than the first syringe, the first inner set of retaining flanges being movable in an axial direction when contacted by the second syringe to allow the second syringe to move rearward to cooperate with the second outer set of retaining flanges.

6. The syringe interface of claim 5 wherein the first inner set of retaining flanges is biased in an axial forward position.

7. The syringe interface of claim 2 wherein each set of retaining flanges is positioned at a different axial position, the aperture dimension created by each of the sets of retaining flanges decreasing when moving axially rearward.

8. The syringe interface of claim 1 including a generally cone-shaped threaded flange to cooperate with a corresponding threaded flange on each of the plurality of syringes.

9. A syringe drive mechanism including a drive member and a syringe interface for attaching a plurality of syringes having different barrel diameters to the syringe drive mechanism, each of the syringes including at least one mounting flange, the at least one mounting flange of syringes of different barrel diameters extending radially outward to different extents, the syringe interface including a plurality of syringe mount apertures having different dimensions to attach each of the plurality of syringes to the syringe interface, each syringe mount aperture being positioned at a different axial position on the syringe interface such that the syringe mount apertures having a larger diameter are positioned forward of the syringe mount apertures having a smaller diameter each of the plurality of syringe mount apertures having an axis in general alignment with an axis of the chive member, each of the syringe mount apertures of the syringe interface comprising at least one retaining flange, the retaining flange of each syringe mount aperture projecting radially inward to a different radial position to cooperate with the at least one mounting flange of one of the syringes, each of the retaining flanges of each of the syringe mount apertures being in general alignment about the circumference of the syringe.

10. The syringe drive mechanism of claim 9 wherein each syringe mount aperture includes a set of a plurality of retaining flanges, each set of retaining flanges extending radially inwardly to create a unique aperture dimension, each set of the retaining flanges of each of the syringe mount apertures being in general alignment about the circumference of the syringe, each syringe mount aperture further including at least one mounting slot between the retaining flanges to allow passage of each mounting flange on one of the syringes therethrough, each of the mounting slots of each of the syringe mount apertures being in general alignment about the circumference of the syringe, the mounting flanges on the syringe being rotatable relative to the retaining flanges of the syringe mount aperture to be positioned in abutting cooperation with the retaining flanges of the syringe mount aperture.

11. The syringe drive mechanism of claim 10 wherein each set of retaining flanges includes two retaining flanges positioned generally opposite of each other, two generally opposing mounting slots being positioned between the retaining flanges of each set of retaining flanges to cooperate with two generally opposing mounting flanges on one of the syringes.

12. The syringe drive mechanism of claim 11 wherein at least one of set of retaining flanges is movable in an axial direction relative to another set of retaining flanges.

13. The syringe drive mechanism of claim 12 including a first inner set of retaining flanges for cooperation with a first syringe and a second outer set of retaining flanges for cooperation with a second syringe, the second syringe having a diameter larger than the first syringe, the first inner set of retaining flanges being movable in an axial direction when contacted by the second syringe to allow the second syringe to move rearward to cooperate with the second outer set of retaining flanges.

14. The syringe drive mechanism of claim 13 wherein the first inner set of retaining flanges is biased in an axial forward position.

15. The syringe drive mechanism of claim 10 wherein each set of retaining flanges is positioned at a different axial position, the aperture dimension created by each of the sets of retaining flanges decreasing when moving axially rearward.

16. The syringe drive mechanism of claim 9 including a generally cone-shaped threaded flange to cooperate with a corresponding threaded flange on each of the plurality of syringes.

17. The syringe drive mechanism of claim 9 further including a sensing system to sense which size of the plurality of syringes is mounted on the syringe interface.

18. The syringe drive mechanism of claim 17 further including a processor and a memory in operative communication with the drive member, the memory ineluding a control program stored therein, the processor being in communication with the sensing system so that the control program controls the drive member according to the syringe sensed to be attached to the syringe interface.

19. A powered injector including a drive member, a drive to deliver power to the drive member, a processor in communication with the drive, the processor also being in communication with a memory in which at least one control program is stored, the control program including instructions for control of the drive, the powered injector further including a syringe interface for attaching a plurality of syringes having different barrel diameters to the powered injector so that the drive member can impart motion to a plunger slidably positioned within eaAzh of the syringes, each of the syringes including at least one mounting flange, the mounting flanges of syringes of different barrel diameters extending radially outwardly to different extents, the syringe interface including a plurality of syringe mount apertures having different dimensions to attach each of the plurality of syringes to the syringe interface, each syringe mount aperture being positioned at a different axial position on the syringe interface such that the syringe mount apertures having a larger diameter are positioned forward of the syringe mount apertures having a smaller diameter each of the plurality of syringe mount apertures having an axis in general alignment with an axis of the drive member, each of the syringe mount apertures of the syringe interface comprising at least one retaining flange, the retaining flange of each syringe mount aperture projecting radially inward to a different radial position to cooperate with one of the mounting flanges of one of the syringes, each of the retaining flanges of each of the syringe mount apertures being in general alignment about the circumference of the syringe, the powered injector further including a sensing system to detect which of the syringes is attached to the syringe interface, the sensing system being in communication with the processor so that the control program controls the drive in a manner determined by the syringe detected to be attached to the syringe interface.

20. The powered injector of claim 19 wherein each syringe mount aperture includes a set of a plurality of retaining flanges, each set of retaining flanges extending radially, inwardly to create a unique aperture dimension, each set of retaining flanges of each of the syringe mount apertures being in general alignment about the circumference of the syringe, each syringe mount aperture further including at least one mounting slot between the retaining flanges to allow passage of each mounting flange on one of the syringes therethrough, each of the mounting slots of each of the syringe mount apertures being in general alignment about the circumference of the syringe, the mounting flanges on the syringe being rotatable relative to the retaining flanges of the syringe mount aperture to be positioned in abutting cooperation with the retaining flanges of the syringe mount aperture.

21. The powered injector of claim 20 wherein each set of retaining flanges includes two retaining flanges positioned generally opposite of each other, two generally opposing mounting slots being positioned between the retaining flanges of each set of retaining flanges to cooperate with two generally opposing mounting flanges on one of the syringes.

22. The powered injector of claim 21 wherein at least one of set of retaining flanges is movable in an axial direction relative to another set of retaining flanges.

23. The powered injector of claim 22 including a first inner set of retaining flanges for cooperation with a first syringe and a second outer set of retaining flanges for cooperation with a second syringe, the second syringe having a diameter larger than the first syringe, the first inner set of retaining flanges being movable in an axial direction when contacted by the second syringe to allow the second syringe to move rearward to cooperate with the second outer set of retaining flanges.

24. The powered injector of claim 23 wherein the first inner set of retaining flanges is biased in an axial forward position.

25. The powered injector of claim 20 wherein each set of retaining flanges is positioned at a different axial position, the aperture dimension created by each of the sets of retaining flanges decreasing when moving axially rearward.

26. The powered injector of claim 19 including a generally cone-shaped threaded flange to cooperate with a conesponding threaded flange on each of the plurality of syringes.