Pressure jacket having syringe retaining element

Patent metadata

Field	Value
Publication number	US-2019192770-A1
Application number	US-201716331366-A
Country	US
Kind code	A1
Filing date	Sep 14, 2017
Priority date	Sep 16, 2016
Publication date	Jun 27, 2019
Grant date	—

Abstract

A pressure jacket configured for connecting to an injector head of a fluid injector has an open distal end, an open proximal end, and a sidewall defining a throughbore extending between the distal end and the proximal end along a longitudinal axis. The throughbore is configured for receiving at least a portion of a syringe. The pressure jacket has at least one syringe retaining element positioned at least partially within the throughbore. The at least one syringe retaining element is configured for engaging at least a portion of the syringe during pressurized delivery of fluid from the syringe to prevent or limit a distal movement of the syringe relative to the pressure jacket.

First claim

1 . A pressure jacket configured for removably connecting to an injector head of a fluid injector, the pressure jacket comprising:
an open distal end, an open proximal end, and a sidewall defining a throughbore extending between the distal end and the proximal end along a longitudinal axis, the throughbore configured for receiving at least a portion of a syringe; and at least one syringe retaining element positioned at least partially within the throughbore; wherein the at least one syringe retaining element is configured for engaging at least a portion of the syringe during pressurized delivery of fluid from the syringe to prevent or limit a distal movement of the syringe relative to the pressure jacket.

2 . The pressure jacket of claim 1 , wherein the at least one syringe retaining element comprises at least one expansion pocket recessed radially outward into an interior surface of the sidewall of the pressure jacket.

3 . The pressure jacket of claim 2 , wherein a volume of the at least one expansion pocket is selected to prevent plastic yield of a sidewall of the syringe during the pressurized delivery of fluid from the syringe exceeding a predetermined threshold pressure.

4 . The pressure jacket of claim 2 , wherein a volume of the at least one expansion pocket is selected to maintain a predetermined axial restraining force due to radial expansion of at least a portion of a sidewall of the syringe into the at least one expansion pocket during the pressurized delivery of fluid from the syringe.

5 . The pressure jacket of claim 2 , wherein the at least one expansion pocket is circumferentially continuous or discontinuous around a circumference of the interior sidewall of the pressure jacket.

6 . The pressure jacket of claim 2 , wherein the at least one expansion pocket comprises a plurality of expansion pockets axially offset from each other along the longitudinal axis of the pressure jacket.

7 . (canceled)

8 . The pressure jacket of claim 1 , wherein the at least one syringe retaining element comprises at least one protrusion protruding radially inward from an interior surface of the sidewall of the pressure jacket.

9 . The pressure jacket of claim 8 , wherein the at least one protrusion is circumferentially continuous or discontinuous around a circumference of the interior surface of the sidewall of the pressure jacket.

10 . A pressure jacket configured for removably connecting to an injector head of a fluid injector, the pressure jacket comprising:
an open distal end, an open proximal end, and a sidewall defining a throughbore extending between the distal end and the proximal end along a longitudinal axis, the throughbore configured for receiving at least a portion of a syringe; at least one syringe retaining element positioned at least partially within the throughbore; and at least one actuation mechanism operatively connected to the at least one syringe retaining element, wherein the at least one actuation mechanism is configured to move the at least one syringe retaining element relative to the pressure jacket between a disengaged position to permit a distal movement of the syringe within the throughbore and an engaged position to limit or prevent the distal movement of the syringe during pressurized delivery of fluid from the syringe.

11 . The pressure jacket of claim 10 , wherein the at least one actuation mechanism is axially or radially movable relative to the pressure jacket to move the at least one syringe retaining element between the disengaged position and the engaged position.

12 . (canceled)

13 . The pressure jacket of claim 10 , wherein the at least one syringe retaining element comprises a plurality of radially extendable and retractable fingers, wherein the plurality of radially extendable and retractable fingers extend radially inward from an interior surface of the sidewall of the pressure jacket in the engaged position and retract into a pocket recessed into the interior surface of the sidewall of the pressure jacket in the disengaged position.

14 . The pressure jacket of claim 13 , wherein a distal end of at least a portion of the plurality of radially extendable and retractable fingers has a retaining lip configured to engage at least a portion of a distal end of the syringe when the plurality of radially extendable and retractable fingers are in the engaged position.

15 . The pressure jacket of claim 10 , wherein the at least one syringe retaining element comprises a spring having a first end connected to at least a portion of the pressure jacket and a second end connected to the at least one actuation mechanism.

16 . The pressure jacket of claim 15 , wherein the spring is biased to the engaged position.

17 . The pressure jacket of claim 10 , wherein the at least one syringe retaining element comprises a compressible ring positioned within a pocket recessed into an interior surface of the sidewall of the pressure jacket.

18 . The pressure jacket of claim 17 , wherein the at least one actuation mechanism compresses the compressible ring in the engaged position to move at least a portion of the compressible ring radially inward out of the interior surface of the sidewall of the pressure jacket.

19 . The pressure jacket of claim 10 , wherein the at least one syringe retaining element comprises a sleeve positioned within the throughbore of the pressure jacket between an interior surface of the sidewall of the pressure jacket and an exterior surface of the syringe.

20 . A fluid injector for delivering fluid to a patient, the fluid injector comprising:
at least one injector head; and at least one pressure jacket removably connected to the at least one injector head, the at least one pressure jacket having an open distal end, an open proximal end, and a sidewall defining a throughbore extending between the distal end and the proximal end along a longitudinal axis, the throughbore configured for receiving at least a portion of a syringe; and at least one syringe retaining element positioned at least partially within the throughbore, wherein the at least one syringe retaining element is configured for engaging at least a portion of the syringe during pressurized delivery of fluid from the syringe to prevent or limit a distal movement of the syringe relative to the at least one pressure jacket.

21 . The pressure jacket of claim 8 , wherein the at least one protrusion comprises a plurality of protrusions axially offset along the longitudinal axis of the pressure jacket.

22 . The pressure jacket of claim 1 , wherein at least one syringe retaining element comprises at least one expansion pocket recessed radially outward into an interior surface of the sidewall of the pressure jacket and at least one protrusion protruding radially inward from an interior surface of the sidewall of the pressure jacket.

Assignees

• Bayer Healthcare Llc

Inventors

• Spohn Michael
• Cowan Kevin
• Tucker Barry
• Johnston Gregory
• Mcdermott Michael
• Dedig James

Classifications

• A61M5/007

  for contrast media · CPC title

• A61M2005/14553

  comprising a pressure jacket · CPC title

• A61M5/14546 Primary

  Front-loading type injectors · CPC title