INFUSION PUMP

• US 20150151057A1
• Filed: 02/10/2015
• Published: 06/04/2015
• Est. Priority Date: 08/10/2012
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: NAKANISHI, Masaru
• Granted Patent: US 10,029,051 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 2005/16868 Downstream occlusion sensors
• CPC Class Codes: A61M 2005/16872 Upstream occlusion sensors
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• 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 5/162 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 Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626

Abstract

An infusion pump includes a main body; a tube attachment section, in which an infusion tube is attachable; a liquid feed driving unit disposed inside the main body; an access cover mounted on the main body and configured to cover the infusion tube when the infusion tube is attached to the tube attachment section when closed; and a bubble detection unit. The bubble detection unit includes a first member disposed at the access cover and a second member disposed at the main body. The infusion pump is configured such that, when the infusion tube is attached to the tube attachment section, a first space of the infusion tube is located between the first member and the second member of the bubble detection unit a second space of the infusion tube is located downstream of the first space, and the second space is smaller than the first space.

Claims

1. An infusion pump comprising:

a main body;

a tube attachment section disposed inside the main body, in which an infusion tube configured to feed a medicinal solution to a patient side of the infusion pump is attachable;

a liquid feed driving unit disposed inside the main body and configured to feed the medicinal solution inside the infusion tube by pressing the infusion tube when the infusion tube is attached to the tube attachment section;

an access cover mounted on the main body and configured to cover the infusion tube when the infusion tube is attached to the tube attachment section when closed; and

a bubble detection unit configured to detect a bubble inside the infusion tube when the infusion tube is attached to the tube attachment section,

wherein the bubble detection unit includes a first member disposed at the access cover and a second member disposed at the main body,

wherein the infusion pump is configured such that, when the infusion tube is attached to the tube attachment section, a first space of the infusion tube is located between the first member and the second member of the bubble detection unit a second space of the infusion tube is located downstream of the first space, and the second space is smaller than the first space.

2. The infusion pump according to claim 1,

wherein the first member includes a base portion, a first projecting curved surface portion formed in a projecting manner from the base portion, and a projecting portion formed in a projecting manner from the base portion located downstream of the first projecting curved surface portion,

wherein the second member includes a second projecting curved surface portion facing the first projecting curved surface portion of the first member,

wherein the second projecting curved surface portion and the first projecting curved surface portion are configured to set the first space, and

wherein the projecting portion is configured to set the second space.

3. The infusion pump according to claim 2, wherein a projecting height of the projecting portion from the base portion is greater than a projecting height of the first projecting curved surface portion from the base portion.

4. The infusion pump according to claim 3, wherein one of the first member and the second member includes an ultrasonic transmitting unit and the other of the first member and the second member includes an ultrasonic receiving unit.

5. The infusion pump according to claim 4, wherein an electromagnetic shield is provided at the ultrasonic transmitting unit and the ultrasonic receiving unit.

6. The infusion pump according to claim 4, wherein the ultrasonic receiving unit is configured to transmit a bubble detection signal to a control unit.

7. The infusion pump according to claim 1,

wherein the first member includes a base portion and a first projecting curved surface portion formed in a projecting manner from the base portion,

wherein the second member includes a second projecting curved surface portion facing the first projecting curved surface portion of the first member,

wherein the infusion pump includes a projecting portion formed in a projecting manner located downstream of the first projecting curved surface portion,

wherein the second projecting curved surface portion and the first projecting curved surface portion are configured to set the first space, and

wherein the projecting portion is configured to set the second space.

8. The infusion pump according to claim 7, wherein a projecting height of the projecting portion is greater than a projecting height of the first projecting curved surface portion.

9. The infusion pump according to claim 8, wherein one of the first member and the second member includes an ultrasonic transmitting unit and the other of the first member and the second member includes an ultrasonic receiving unit.

10. The infusion pump according to claim 1, wherein a display unit and an operation panel are disposed at an upper portion of the main body, and the tube attachment section, the liquid feed driving unit, and the access cover are disposed at a lower portion of the main body.

11. The infusion pump according to claim 1, wherein the infusion tube configured to feed a medicinal solution to a patient side of the infusion pump is attachable in a horizontal direction, and the liquid feed driving unit is configured to feed the medicinal solution inside the infusion tube in the horizontal direction.