Systems for wearable infusion port and associated pump

Patent metadata

Field	Value
Publication number	US-12156987-B2
Application number	US-202217734764-A
Country	US
Kind code	B2
Filing date	May 2, 2022
Priority date	Nov 21, 2019
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A pump for delivering a fluid includes a pump housing that defines at least one reservoir having a circumferentially open first end, a circumferentially closed second end and a chamber to receive the fluid. The pump includes a plunger assembly having at least one plunger arm and a cannula fluidly coupled to the plunger arm to dispense the fluid from the pump. The plunger arm is receivable within the first end of the reservoir, and the at least one plunger arm defining an internal conduit to receive the fluid from the at least one fluid reservoir. The internal conduit is fluidly coupled to the cannula. The plunger assembly is movable in a first direction relative to the pump housing to advance the plunger arm within the fluid reservoir to dispense the fluid from the fluid reservoir out of the pump via the cannula.

First claim

What is claimed is:

1. A pump for delivering a fluid, comprising:
a pump housing that defines at least one reservoir having a circumferentially open first end, a circumferentially closed second end and a chamber defined between the first end and the second end to receive the fluid; and
a plunger assembly having a plunger base, at least one plunger arm and a cannula, the at least one plunger arm coupled to a perimeter of the plunger base and the cannula coupled proximate a center of the plunger base, the at least one plunger arm receivable within the first end of the at least one fluid reservoir, the at least one plunger arm defining an internal conduit to receive the fluid from the at least one fluid reservoir, the internal conduit is fluidly coupled to a base conduit defined in the plunger base, the base conduit fluidly coupled to the cannula, and the plunger assembly is movable in a first direction relative to the pump housing to advance the at least one plunger arm within the at least one fluid reservoir to dispense the fluid from the at least one fluid reservoir out of the pump via the cannula.

2. The pump of claim 1 , further comprising a biasing member coupled to the plunger assembly to move the plunger assembly relative to the pump housing to dispense the fluid from the at least one fluid reservoir.

3. The pump of claim 2 , further comprising a lock system coupled to the pump housing between the pump housing and the plunger base, the lock system movable to move the plunger assembly between a first, unlocked position in which the plunger assembly is movable relative to the pump housing to dispense the fluid and a second, locked position in which the plunger assembly is fixed relative to the pump housing.

4. The pump of claim 3 , wherein the lock system further comprises a lock plate and a lock biasing member, the lock plate coupled to the pump housing proximate the plunger base, the lock biasing member coupled between the lock plate and the pump housing, and the lock biasing member biases the lock plate into contact with the plunger base in the second, locked position.

5. The pump of claim 3 , wherein the plunger assembly is movable in a second direction relative to the pump housing to move the plunger assembly between the second, locked position and the first, unlocked position and the second direction is different than the first direction.

6. The pump of claim 5 , wherein the plunger base further comprises a cannula coupling portion coupled to the plunger base, the cannula coupling portion having a first end coupled to the pump housing and a second end coupled to the cannula, the second end extending a distance beyond a surface of the plunger base to receive a force to move the plunger assembly in the second direction.

7. The pump of claim 1 , wherein the at least one fluid reservoir comprises a plurality of fluid reservoirs and the at least one plunger arm comprises a plurality of plunger arms, the plurality of fluid reservoirs spaced apart about a perimeter of the pump housing and each plunger arm of the plurality of plunger arms is movable within a respective one of the plurality of fluid reservoirs to dispense the fluid from the respective one of the plurality of fluid reservoirs.

8. The pump of claim 1 , wherein the at least one plunger arm includes a plunger to form a seal between the at least one plunger arm and the at least one fluid reservoir, and the plunger defines an inlet in fluid communication with the internal conduit.

9. A pump for delivering a fluid, comprising:
a pump housing that defines at least one reservoir having a circumferentially open first end, a circumferentially closed second end and a chamber defined between the first end and the second end to receive the fluid;
a plunger assembly having a plunger base, at least one plunger arm and a cannula, the at least one plunger arm coupled to a perimeter of the plunger base and the cannula coupled proximate a center of the plunger base, the at least one plunger arm receivable within the first end of the at least one fluid reservoir, the at least one plunger arm defining an internal conduit to receive the fluid from the at least one fluid reservoir, the internal conduit is fluidly coupled to a base conduit defined in the plunger base, the base conduit fluidly coupled to the cannula, and the plunger assembly is movable in a first direction relative to the pump housing to advance the at least one plunger arm within the at least one fluid reservoir to dispense the fluid from the at least one fluid reservoir out of the pump via the cannula; and
a lock system coupled to the pump housing between the pump housing and the plunger base, the lock system movable to move the plunger assembly between a first, unlocked position in which the plunger assembly is movable relative to the pump housing to dispense the fluid and a second, locked position in which the plunger assembly is fixed relative to the pump housing.

10. The pump of claim 9 , further comprising a biasing member coupled to the plunger assembly to move the plunger assembly relative to the pump housing in the first direction to dispense the fluid from the at least one fluid reservoir, the plunger assembly is movable in a second direction relative to the pump housing to move the plunger assembly between the second, locked position and the first, unlocked position, and the second direction is different than the first direction.

11. The pump of claim 9 , wherein the lock system further comprises a lock plate and a lock biasing member, the lock plate coupled to the pump housing proximate the plunger base, the lock biasing member coupled between the lock plate and the pump housing, and the lock biasing member biases the lock plate into contact with the plunger base in the second, locked position.

12. The pump of claim 9 , wherein the plunger assembly is movable in a second direction relative to the pump housing to move the plunger assembly between the second, locked position and the first, unlocked position and the second direction is different than the first direction.

13. The pump of claim 12 , wherein the plunger base further comprises a cannula coupling portion coupled to the plunger base, the cannula coupling portion having a first end coupled to the pump housing and a second end coupled to the cannula, the second end extending a distance beyond a surface of the plunger base to receive a force to move the plunger assembly in the second direction.

14. The pump of claim 9 , wherein the at least one fluid reservoir comprises a plurality of fluid reservoirs and the at least one plunger arm comprises a plurality of plunger arms, the plurality of fluid reservoirs spaced apart about a perimeter of the pump housing and each plunger arm of the plurality of plunger arms is movable within a respective one of the plurality of fluid reservoirs to dispense the fluid from the respective one of the plurality of fluid reservoirs.

15. The pump of claim 9 , wherein the at least one plunger arm includes a plunger to form a seal between the at least one plunger arm and the at least one fluid reservoir, and the plunger defines an inlet in fluid communication with the internal conduit.

Assignees

• Medtronic Minimed Inc

Inventors

• Larson Eric
• Chen Shixin
• Johansson Magnus
• Lintereur Louis J
• Reeder Austin
• Schultz Peter

Classifications

• A61M5/14212

  Pumping with an aspiration and an expulsion action · CPC title

• A61M5/1454

  spring-actuated, e.g. by a clockwork · CPC title

• A61M5/1408

  in parallel, e.g. manifolds, sequencing valves (access sites A61M39/02; tube connectors A61M39/10) · CPC title

• A61M2039/226

  Spindles or actuating means · CPC title

• A61M5/1723

  using feedback of body parameters, e.g. blood-sugar, pressure (measurement of body parameters A61B5/00) · CPC title