INFUSION PUMP

• US 20150018766A1
• Filed: 09/26/2014
• Published: 01/15/2015
• Est. Priority Date: 03/26/2012
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: NAKANISHI, Masaru, HASEGAWA, Makoto
• Granted Patent: US 9,616,170 B2
• Time in Patent Office: Days
• US Class Current: 604/151
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 2005/16868 Downstream occlusion sensors
• CPC Class Codes: A61M 2005/16872 Upstream occlusion sensors
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 39/284 Lever clamps
• CPC Class Codes: A61M 5/14 Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
• CPC Class Codes: A61M 5/1418 Clips, separators or the like for supporting tubes or leads
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: A61M 5/16804 Flow controllers
• CPC Class Codes: A61M 5/16813 by controlling the degree of opening of the flow line

Abstract

An infusion pump comprises a tube attachment section configured such that an infusion tube is detachably attachable to the tube attachment section, an access cover configured to close the tube attachment section in an openable manner, and a tube clamp mechanism located within the tube attachment section and configured to clamp and block a portion of the infusion tube. The tube clamp mechanism comprises a base member, a clip clamp member rotatably mounted on the base member, a tube clamp release lever rotatably mounted on the base member, and a tube clamp member rotatably mounted on the base member.

Claims

1. An infusion pump, comprising:

a tube attachment section configured such that an infusion tube is detachably attachable to the tube attachment section;

an access cover configured to close the tube attachment section in an openable manner; and

a tube clamp mechanism located within the tube attachment section and configured to clamp and block a portion of the infusion tube, the tube clamp mechanism comprising;

a base member;

a clip clamp member rotatably mounted on the base member;

a tube clamp release lever rotatably mounted on the base member; and

a tube clamp member rotatably mounted on the base member,

wherein the clip clamp member is configured to reversibly clamp a clip member that is attachable to a portion of the infusion tube, such that when the access cover is open and the clip member is present, the clip clamp member clamps the clip member and thereby forms a blocking portion at a location along the infusion tube, and such that when the access cover is closed and the clip member is present, the clip clamp member releases the clip member and thereby eliminates the blocking portion, and

wherein the tube clamp release lever is configured to push the tube clamp member in a direction away from the infusion tube when the tube clamp release lever is pushed by a user.

2. The infusion pump according to claim 1, wherein the tube clamp member is configured to clamp a portion of the infusion tube and form a blocking portion when the clip member is not present and the access cover is open, and to separate from the infusion tube and eliminate the blocking portion when the access cover is closed.

3. The infusion pump according to claim 1, further comprising an engagement section configured to engage the tube clamp member with the clip clamp member so as to be integrally rotated in a case of operating in a direction toward the infusion tube, and disengage the tube clamp member from the clip clamp member to release the clip clamp member from restriction of the tube clamp member in a case of operating in a direction away from the infusion tube.

4. The infusion pump according to claim 1, further comprising a first spring configured to bias the tube clamp member to clamp the infusion tube.

5. The infusion pump according to claim 1, further comprising a display unit disposed on an upper portion of the infusion pump and configured to display information.

6. The infusion pump according to claim 1, further comprising an operation panel provided with operating buttons disposed on an upper portion of the infusion pump,

7. The infusion pump according to claim 1, wherein the tube attachment section and the access cover are disposed on a lower portion of the infusion pump.

8. The infusion pump according to claim 1, further comprising the clip member.

9. The infusion pump according to claim 1, further comprising a liquid feed driving unit.

10. The infusion pump according to claim 4, further comprising a second spring attached at a first end to the tube clamp release lever and at a second end to the base member.

11. The infusion pump according to claim 10, wherein the spring constant of the second spring is 3 to 8 percent of the spring constant of the first spring.

12. The infusion pump according to claim 1, wherein the infusion pump is configured to have a infusion tube attached to be held in a horizontal orientation.

13. The infusion pump according to claim 1, further comprising a bubble sensor, an upstream block sensor, and a downstream block sensor disposed in the tube attachment section.

14. The infusion pump according to claim 9, further comprising an infusion tube pressing member disposed on the access cover.

15. The infusion pump according to claim 1, wherein the tube clamp member, tube clamp release lever, and clip clamp member are made of plastic material.