Method and device for removing gas and/or gas bubbles from a liquid medicament stored in a reservoir

Patent metadata

Field	Value
Publication number	US-10967135-B2
Application number	US-201815880196-A
Country	US
Kind code	B2
Filing date	Jan 25, 2018
Priority date	Jan 31, 2017
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

This disclosure concerns a method for removing gas and/or gas bubbles from a liquid medicament stored in a reservoir for an infusion pump device. The reservoir comprises a displacing member which is at least partly displaceable relative to the reservoir thereby enabling receiving mechanical oscillations in order to generate mechanical waves in the liquid medicament. The method comprises: providing the reservoir; and transmitting a mechanical oscillation to the displacing member of the reservoir thereby generating a mechanical wave in the liquid medicament for removing gas and/or gas bubbles from the liquid medicament.

First claim

What is claimed is:

1. A method for removing gas and/or gas bubbles from a liquid medicament used in an infusion pump, the method comprising:
providing a reservoir containing liquid medicament and providing a displacing member that is at least partly displaceable relative to the reservoir;
providing a mechanical actuator configured to generate a mechanical oscillation; and
using the mechanical actuator to cause a mechanical impact to thereby transmit a mechanical oscillation to the displacing member and thereby generating a mechanical wave in the liquid medicament, wherein the wave removes gas and/or gas bubbles from the liquid medicament.

2. The method according to claim 1 , wherein the displacing member is a plunger arranged at an opening of the reservoir, and wherein the mechanical oscillation is transmitted to the plunger, which generates the mechanical wave.

3. The method according to claim 2 , wherein the plunger comprises a sealing element.

4. The method according to claim 2 , wherein a plunger rod is connected to the plunger, and wherein the mechanical oscillation is transmitted to the plunger via the plunger rod.

5. The method according to claim 1 , wherein the displacing member is a flexible membrane which seals an opening of the reservoir, and wherein the mechanical oscillation is transmitted to the flexible membrane.

6. The method according to claim 1 , wherein the reservoir is cylindrical and the displacing member is displaceable in an axial direction of the reservoir.

7. The method according to claim 1 , wherein the mechanical oscillation has the form of an impulse and/or is the result of a mechanical stroke.

8. The method according to claim 1 , wherein the mechanical wave generated by the displacing member has the form of a positive pressure wave.

9. The method according to claim 1 , wherein the mechanical wave generated by the displacing member has the form of a negative pressure wave.

10. The method according to claim 1 , wherein the mechanical oscillation results from an impulse hammer.

11. A device for removing gas and/or gas bubbles from a liquid medicament, comprising:
a reservoir for an infusion pump;
a displacing member which is at least partly displaceable relative to the reservoir and is configured to receive mechanical oscillations in order to generate mechanical waves in the liquid medicament;
a mechanical actuator configured for causing a mechanical impact to thereby generate the mechanical oscillations; and
a transmission configured to transmit the mechanical oscillations from the mechanical actuator to the displacing member, whereby the displacing member is configured to generate a mechanical wave in the liquid medicament for removing gas and/or gas bubbles from the liquid medicament.

12. The device according to claim 11 , wherein the displacing member is a plunger displaceably arranged at an opening of the reservoir.

13. The device according to claim 11 , wherein the displacing member is a flexible membrane which seals an opening of the reservoir.

14. The auxiliary device according to claim 11 , wherein the mechanical actuator comprises an impulse hammer.

15. A method for removing gas and/or gas bubbles from a liquid medicament used in an infusion pump, the method comprising:
providing a reservoir containing liquid medicament and providing a displacing member that is at least partly displaceable relative to the reservoir;
providing a flexible membrane configured to receive oscillations and further configured to transmit the oscillations to the liquid medicament to remove gas and/or gas bubbles from the liquid medicament;
providing a mechanical actuator configured to generate a mechanical oscillation; and
using the mechanical actuator to transmit a mechanical oscillation to the displacing member and thereby generating a mechanical wave in the liquid medicament, wherein the wave removes gas and/or gas bubbles from the liquid medicament.

Assignees

• Roche Diabetes Care Inc

Inventors

• Deck Frank

Classifications

• B01D19/0078

  by vibration · CPC title

• B01D19/0031

  by filtration · CPC title

• A61M2205/10

  with powered movement mechanisms · CPC title

• A61M5/1452

  pressurised by means of pistons · CPC title

• B01F2101/2202

  Mixing compositions or mixers in the medical or veterinary field · CPC title