System and method for syringe engagement with injector

Patent metadata

Field	Value
Publication number	US-2019231975-A1
Application number	US-201916253539-A
Country	US
Kind code	A1
Filing date	Jan 22, 2019
Priority date	Jan 31, 2018
Publication date	Aug 1, 2019
Grant date	—

Abstract

A fluid injector including an injector housing with at least one syringe port for receiving a syringe, and a locking mechanism associated with the at least one syringe port for securing the syringe within the at least one syringe port. The locking mechanism is configured for engaging at least one syringe retaining member of the syringe to releasably lock the syringe within the at least one syringe port. The at least one syringe retaining member rotationally guides the syringe into self-orienting alignment with the locking mechanism and is rotated by the locking mechanism into fully locked position after axial installation of the syringe into the at least one syringe port. The locking mechanism also axially ejects the syringe from the locking mechanism upon rotation of the syringe during removal.

First claim

1 . A medical fluid injector comprising:
an injector housing; at least one syringe port in the injector housing for receiving a proximal portion of a syringe; and a locking mechanism associated with the at least one syringe port for releasably locking the syringe within the at least one syringe port by releasably engaging at least one syringe retaining member of the syringe, the locking mechanism comprising:
a locking ring rotatable between a first locked position and a second insertion/removal position for insertion or removal of the syringe from the locking mechanism;
a biasing mechanism for biasing the locking ring in the first locked position; and
at least one guide second member on the locking ring, the at least one guide second member having a ramp surface for interacting with the at least one syringe retaining member of the syringe to rotate the locking ring from the first locked position to the second insertion/removal position as the syringe is inserted into the at least one syringe port.

2 . The medical fluid injector of claim 1 , wherein the at least one guide second member on the locking ring interacts with the at least one syringe retaining member of the syringe to rotate the locking ring from the first locked position to the second insertion/removal position when the syringe is rotated while in a locked position in the locking mechanism.

3 . The medical fluid injector of claim 2 , wherein a ramp surface of the at least one second guide member interacts with the at least one syringe retaining member of the syringe to axially eject the syringe from the locked position when the locking ring is rotated into the second insertion/removal position.

4 . The medical fluid injector of claim 1 , wherein the locking ring further comprises a stop surface at least partially extending from the proximal end of the ramp surface to the distal surface of the locking ring, wherein the stop surface prevents rotation of the syringe relative to the locking mechanism when the syringe is locked within the mechanism.

5 . The medical fluid injector of claim 1 , wherein the at least one syringe port further comprises a sidewall having a plurality of recesses and at least one first guide member extending radially inward from the side wall and positioned between each adjacent recesses of the plurality of recesses.

6 . The medical fluid injector of claim 5 , wherein the at least one first guide member comprises one or more guiding surfaces for guiding the at least one syringe retaining member into self-orienting alignment with the locking ring.

7 . The medical fluid injector of claim 5 , wherein the at least one first guide member comprises a first guiding ramp and a second guiding ramp, wherein the first guiding ramp and the second guiding ramp are inclined toward a first adjacent recess and a second adjacent recess, respectively, on each side of the at least one first guide member.

8 . The medical fluid injector of claim 5 , wherein the at least one first guide member has a proximal surface for abutting against a base surface the at least one syringe retaining member when the syringe is locked within the locking mechanism to prevent distal movement of the syringe when locked in the locking mechanism.

9 . The medical fluid injector of claim 1 , wherein the biasing mechanism is a spring.

10 . The medical fluid injector of claim 1 , wherein the locking mechanism further comprises at least one sensor for detecting an angular position of the locking ring based on an orientation of a sensor pickup on the locking ring relative to the at least one sensor.

11 . The medical fluid injector of claim 10 , wherein the at least one sensor is an optical sensor, a Hall Effect sensor, or a combination thereof.

12 . The medical fluid injector of claim 10 , wherein the sensor pickup is a magnet.

13 . The medical fluid injector of claim 1 , wherein the at least one injector port comprises a barcode reader system for reading at least one identification tag on the proximal portion of the syringe.

14 . A fluid injector comprising an injector housing with at least one syringe port for receiving a syringe, the injector housing comprising:
a locking mechanism associated with the at least one syringe port for securing the syringe within the at least one syringe port, the locking mechanism configured for engaging at least one syringe retaining member of the syringe to releasably lock the syringe within the at least one syringe port, wherein the at least one syringe retaining member rotationally guides the syringe into self-orienting alignment with the locking mechanism and axially ejects the syringe from the locking mechanism upon rotation of the syringe.

15 . The fluid injector of claim 14 , wherein the locking mechanism comprises:
a housing having a central opening configured to receive the proximal end of the syringe; a locking ring disposed within the housing, the locking ring rotatable between a first locked position and a second insertion/removal position with rotation of the syringe about a longitudinal axis; and a biasing mechanism for biasing the locking ring in the first locked position.

16 . The fluid injector of claim 15 , wherein the biasing mechanism is a spring.

17 . The fluid injector of claim 14 , wherein the locking mechanism further comprising at least one sensor for detecting an angular position of the locking ring based on orientation of a sensor pickup on the locking ring relative to the at least one sensor.

18 . The fluid injector of claim 17 , wherein the at least one sensor is an optical sensor, a Hall Effect sensor, or a combination thereof.

19 . The fluid injector claim 14 , wherein the at least one syringe port further comprises a sidewall having a plurality of recesses and at least one first guide member positioned between each adjacent recesses of the plurality of recesses.

20 . The fluid injector of claim 19 , wherein the at least one first guide member comprises one or more guiding surfaces for guiding the at least one syringe retaining member into self-orienting alignment with the locking ring.

Assignees

• Bayer Healthcare Llc

Inventors

• Capone Christopher
• Wlodarczyk Jaroslaw

Classifications

• A61M5/31511

  Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence) · CPC title

• A61M2205/3317

  Electromagnetic, inductive or dielectric measuring means · CPC title

• A61M5/14546 Primary

  Front-loading type injectors · CPC title

• A61M5/14566

  with a replaceable reservoir for receiving a piston rod of the pump · CPC title

• A61M2005/323

  Connection between plunger distal end and needle hub proximal end, e.g. stud protruding from the plunger · CPC title