Pressure-regulating fluid transfer systems and methods

Patent metadata

Field	Value
Publication number	US-2023075991-A1
Application number	US-202218050235-A
Country	US
Kind code	A1
Filing date	Oct 27, 2022
Priority date	Jul 19, 2013
Publication date	Mar 9, 2023
Grant date	—

Abstract

Various systems and methods for the pressure-regulated transfer of medical fluids are disclosed. The system can include an adapter assembly that connects with a medical container and with a syringe assembly. The syringe assembly can include a first reservoir and a second reservoir. In various embodiments, when the adapter assembly and the syringe assembly are coupled, the first reservoir and the container can exchange regulating fluid and the second reservoir and the container can exchange medical liquid from the medical container.

First claim

1 . A pressure-regulating syringe assembly configured to couple with a flexible medicinal container containing a liquid, the pressure-regulating syringe assembly comprising:
an elongate body comprising a rigid sidewall; a first fluid reservoir located inside the elongate body, the first fluid reservoir configured to contain a volume of regulating fluid, the first fluid reservoir having a sidewall that is bounded by the rigid sidewall of the elongate body; and a second fluid reservoir located inside the elongate body, the second fluid reservoir configured to provide medical liquid to the flexible medicinal container; wherein pressure-regulating syringe assembly is configured such that, when the syringe assembly is coupled with the flexible medicinal container in an inverted position such that an upper surface of the liquid in the flexible medicinal container is above the syringe assembly, medicinal liquid can be introduced into the flexible medicinal container from the second fluid reservoir without forming a vacuum in the first fluid reservoir and without drawing ambient air into the first reservoir.

2 . The pressure-regulating syringe assembly of claim 1 , wherein the flexible medicinal container comprises an IV bag.

3 . The pressure-regulating syringe assembly of claim 1 , wherein the first fluid reservoir does not comprise a flexible bag.

4 . A method of transferring fluid, the method comprising:
connecting an adaptor with a variable volume medical container comprising readily flexible walls, the variable volume medical container containing a diluent liquid; connecting a syringe unit with the adaptor, the syringe unit comprising a rigid tube comprising a rigid sidewall; positioning the adaptor and syringe unit below an upper surface of the diluent liquid; depressing a plunger of the syringe unit; expelling medical liquid from a medical liquid reservoir of the syringe unit; introducing the medical liquid into the liquid diluent in the variable volume medical container while maintaining substantially ambient pressure in a regulating reservoir of the syringe unit, at least part of the regulating reservoir being bounded by the sidewall of the rigid tube.

5 . The method of claim 4 , further comprising:
mixing the medical liquid and the diluent liquid in the variable volume medical container to form a mixed liquid; retracting the plunger; expelling the mixed liquid from the variable volume medical container; and receiving the mixed liquid in the medical liquid reservoir of the syringe unit while maintaining substantially ambient pressure in the regulating reservoir of the syringe unit.

6 . The method of claim 4 , further comprising expanding the variable volume medical container in response to introducing the medical fluid into the liquid diluent in the variable volume medical container.

Assignees

• Icu Medical Inc

Inventors

• Chhikara Bhupinder
• Lingutla Srinath
• Eads Brandon

Classifications

• A61M5/162 Primary

  Needle sets, i.e. connections by puncture between reservoir and tube {; Connections between reservoir and tube (in jet-action syringes A61M5/30; connectors for tubes having sealed ends and a needle for piercing them A61M39/14)} · CPC title

• A61M2005/3128

  Incorporating one-way valves, e.g. pressure-relief or non-return valves · CPC title

• A61M2005/31598

  having multiple telescopically sliding coaxial pistons encompassing volumes for components to be mixed · CPC title

• A61M2005/1623

  Details of air intake · CPC title

• A61M5/3145

  Filters incorporated in syringes · CPC title