Syringe and syringe fill method

Patent metadata

Field	Value
Publication number	US-2025221892-A1
Application number	US-202519096304-A
Country	US
Kind code	A1
Filing date	Mar 31, 2025
Priority date	Nov 25, 2015
Publication date	Jul 10, 2025
Grant date	—

Abstract

A syringe for delivery of liquid to a container has a body with proximal end, a frustoconical distal end, and a cylindrical sidewall extending a longitudinal axis. The syringe includes a nozzle at a distal portion of the syringe, the nozzle having a throughbore providing fluid communication between an interior volume of the syringe and a medical connector configured to be connected to the nozzle. The nozzle includes a plurality of longitudinal ribs formed on an inner surface of the nozzle. The plurality of longitudinal ribs directs a flow of a medical fluid along an inner surface of the frustoconical distal end and along an interior surface of the cylindrical sidewall of the syringe under a Coandă effect. Syringe and methods for reducing a number of bubbles formed in a medical fluid during a syringe filling procedure are described.

First claim

What is claimed is:

1 . A method for reducing a number of bubbles formed in a fluid during a syringe filling procedure, the method comprising:
flowing the fluid past through a central bore of a nozzle of a syringe; flowing the fluid past a plurality of longitudinal ribs formed on an inner surface of the nozzle and extending radially inward from the inner surface; diverting the fluid by in a radially outward direction toward an angled portion of an inner surface of a frustoconical distal end of the syringe; inducing a Coandă effect in the fluid by the diverting and flowing steps such that the number of bubbles formed during the syringe filling procedure in reduced compared to a filling procedure that does not include the diverting and flowing steps; flowing the fluid down the inner surface of the frustoconical distal end of the syringe; flowing the fluid down an interior surface of a cylindrical sidewall of the syringe, wherein the sidewall extends between the frustoconical distal end and a proximal end; and filling an interior volume of the syringe with the fluid.

2 . The method of claim 1 , wherein the plurality of longitudinal ribs induce the diverting of the fluid in the radially outward direction.

3 . The method of claim 1 , wherein the fill rate of the syringe is increased compared to a fill rate of a syringe without the plurality of longitudinal ribs.

4 . The method of claim 1 , wherein flowing the fluid past a plurality of longitudinal ribs formed on the inner surface of the nozzle and extending radially inward from the inner surface comprises flowing the fluid between a plurality of longitudinal channels between the plurality of longitudinal ribs.

5 . The method of claim 1 , wherein the plurality of longitudinal ribs comprises a plurality of longitudinal ribs having rounded edges.

6 . The method of claim 1 , wherein the plurality of longitudinal ribs comprises a plurality of longitudinal ribs having orthogonal edges.

7 . The method of claim 1 , wherein the plurality of longitudinal ribs are configured to enhance a surface adhesion of the fluid to the inner surface of the frustoconical distal end of the syringe.

8 . A syringe for a powered fluid injector, the syringe comprising:
a proximal end, a frustoconical distal end, and a cylindrical sidewall extending between the proximal end and the distal end; a nozzle at a distal portion of the frustoconical distal end of the syringe, the nozzle having a throughbore providing fluid communication between an interior volume of the syringe and a connector configured to be connected to the nozzle; and a plurality of longitudinal ribs formed on an inner surface of the nozzle and extending radially inward from the inner surface of the nozzle; wherein the plurality of longitudinal ribs directs a flow of a fluid along the inner surface of the frustoconical distal end and along an interior surface of the cylindrical sidewall of the syringe under a Coandă effect as the syringe is being filled with the fluid.

9 . The syringe of claim 8 , wherein the plurality of longitudinal ribs are configured to enhance a surface adhesion of the fluid to the inner surface of the frustoconical distal end.

10 . The syringe of claim 8 , wherein the fluid flows between a plurality of longitudinal channels between the plurality of longitudinal ribs.

11 . A method for filing a syringe with a fluid, the method comprising:
flowing the fluid past through a central bore of a nozzle of a syringe; flowing the fluid past a plurality of longitudinal ribs formed on an inner surface of the nozzle and extending radially inward from the inner surface; diverting the fluid by in a radially outward direction toward an angled portion of an inner surface of a frustoconical distal end of the syringe; inducing a Coandă effect in the fluid by the flowing and diverting steps such that the number of bubbles formed during the syringe filling procedure in reduced compared to a filling procedure that does not include the diverting and flowing steps; flowing the fluid down the inner surface of the frustoconical distal end of the syringe; flowing the fluid down an interior surface of a cylindrical sidewall of the syringe, wherein the sidewall extends between the frustoconical distal end and a proximal end; and filling an interior volume of the syringe with the fluid.

12 . The method of claim 11 , wherein flowing the fluid past a plurality of longitudinal ribs formed on the inner surface of the nozzle and extending radially inward from the inner surface comprises flowing the fluid between a plurality of longitudinal channels between the plurality of longitudinal ribs.

13 . The method of claim 11 , further comprising enhancing a surface adhesion of the fluid to the inner surface of the frustoconical distal end of the syringe.

Assignees

• Bayer Healthcare Llc

Inventors

• Cowan Kevin
• Dedig James A
• Spohn Michael
• Mcdermott Michael

Classifications

• A61J1/201

  having one piercing end · CPC title

• A61J1/2082

  for gas filtration · CPC title

• A61J1/2037

  having valve means · CPC title

• A61J1/2075

  for external venting · CPC title

• A61J1/1406

  Septums, pierceable membranes · CPC title