Tube Clamp for Extracorproeal Circulator and Extracorporeal Circulation System

Patent metadata

Field	Value
Publication number	US-2016361484-A1
Application number	US-201615162773-A
Country	US
Kind code	A1
Filing date	May 24, 2016
Priority date	Feb 7, 2014
Publication date	Dec 15, 2016
Grant date	—

Abstract

A tube clamp for an extracorporeal circulator recognizes various abnormal situations of the tube clamp and notifies a user. The tube clamp has a lid sensor, a tube sensor, and a plunger sensor. In a case where any one of detection of the closure of a lid portion via the lid sensor, detection of the mounting of a tube via the tube sensor, and detection of the movement of a plunger via the plunger sensor is not obtained despite the fact that there is an instruction for blocking the tube, it is determined that the blocking is abnormal. In a case where the three states including the closed state, the mounting state, and the movement state are detected despite the fact that there is no instruction for blocking the tube, it is determined that the tube is erroneously blocked. Such abnormal situations are notified to a user via an alarm.

First claim

What is claimed is:

1 . A tube clamp for an extracorporeal circulator that transfers blood out of a body of a patient and circulates the blood via a tube, wherein the tube clamp blocks the tube when bubbles in the blood or backflow of the blood occur in the tube, the tube clamp comprising:
a body portion including a passageway in which the tube is mounted; a lid portion that encloses the passageway; a movable plunger that selectably presses the tube to block the blood circulation; and a sensor assembly that detects a mounting state in which the tube is mounted in the passageway, a closed state in which the passageway is enclosed by the lid portion, and a movement state in which the plunger is moved.

2 . An extracorporeal circulator that transfers blood out of a body of a patient and recirculates the blood, comprising:
a tube carrying a flow of the blood outside the body of the patient; a tube clamp that selectably blocks the tube in response to a blocking instruction, wherein the tube clamp includes:
a body portion including a passageway in which the tube is mounted;
a lid portion that encloses the passageway;
a movable plunger that selectably presses the tube to block the blood flow; and
a sensor assembly that detects a mounting state in which the tube is mounted in the passageway, a closed state in which the passageway is enclosed by the lid portion, and a movement state in which the plunger is moved; and
a controller coupled to the plunger to provide the blocking instruction to selectably move the plunger, and coupled to the sensor assembly to detect the mounting, closed, and movement states and to generate respective alarms for abnormal states including a notification to a user in the event that the tube is not blocked at a time when the blocking instruction is being provided and the controller fails to detect any one of the closed state, the mounting state, or the movement state.

3 . The extracorporeal circulator of claim 2 wherein the respective alarms for abnormal states further includes a notification to the user in the event that the tube is blocked at a time when the blocking instruction is not being provided and the controller detects the closed state, the mounting state, and the movement state.

4 . The extracorporeal circulator of claim 2 wherein the controller generates a respective notification to the user in the event that preparation for use of the tube clamp has not been completed at a time when there is no blocking instruction and the controller does not detect either the closed state or the mounting state.

5 . The extracorporeal circulator of claim 2 wherein the controller generates a respective notification to the user in the event that preparation for blocking the tube has been completed if the movement state is not detected and the closed state and the mounting state are detected.

6 . The extracorporeal circulator of claim 2 further comprising a flow rate sensor that detects a blood flow rate in the tube;
wherein the controller generates a respective notification to the user indicating that the tube clamp correctly blocks the tube when i) the blocking instruction is being provided, ii) the closed state, the mounting state, and the movement state are all detected, and iii) the flow rate sensor detects a blood flow rate below a threshold.

7 . An extracorporeal circulator that transfers blood out of a body of a patient and recirculates the blood, comprising:
a tube carrying a flow of the blood outside the body of the patient; a tube clamp that selectably blocks the tube in response to a blocking instruction, wherein the tube clamp includes:
a body portion including a passageway in which the tube is mounted;
a lid portion that encloses the passageway;
a movable plunger that selectably presses the tube to block the blood flow; and
a sensor assembly that detects a mounting state in which the tube is mounted in the passageway, a closed state in which the passageway is enclosed by the lid portion, and a movement state in which the plunger is moved; and
a controller coupled to the plunger to provide the blocking instruction to selectably move the plunger, and coupled to the sensor assembly to detect the mounting, closed, and movement states and to generate respective alarms for abnormal states including a notification to a user in the event that the tube is blocked at a time when the blocking instruction is not being provided and the controller detects the closed state, the mounting state, and the movement state.

8 . The extracorporeal circulator of claim 7 wherein the controller generates a respective notification to the user in the event that preparation for use of the tube clamp has not been completed at a time when there is no blocking instruction and the controller does not detect either the closed state or the mounting state.

9 . The extracorporeal circulator of claim 7 wherein the controller generates a respective notification to the user in the event that preparation for blocking the tube has been completed if the movement state is not detected and the closed state and the mounting state are detected.

10 . The extracorporeal circulator of claim 7 further comprising a flow rate sensor that detects a blood flow rate in the tube;
wherein the controller generates a respective notification to the user indicating that the tube clamp correctly blocks the tube when i) the blocking instruction is being provided, ii) the closed state, the mounting state, and the movement state are all detected, and iii) the flow rate sensor detects a blood flow rate below a threshold.

11 . An extracorporeal circulator that transfers blood out of a body of a patient and recirculates the blood, comprising:
a tube carrying a flow of the blood outside the body of the patient; a tube clamp that selectably blocks the tube in response to a blocking instruction, wherein the tube clamp includes:
a body portion including a passageway in which the tube is mounted;
a lid portion that encloses the passageway;
a movable plunger that selectably presses the tube to block the blood flow; and
a sensor assembly that detects a mounting state in which the tube is mounted in the passageway, a closed state in which the passageway is enclosed by the lid portion, and a movement state in which the plunger is moved; and
a controller coupled to the plunger to provide the blocking instruction to selectably move the plunger, and coupled to the sensor assembly to detect the mounting, closed, and movement states and to generate respective alarms for abnormal states including a notification to a user in the event that preparation for use of the tube clamp has not been completed at a time when there is no blocking instruction and the controller does not detect either the closed state or the mounting state.

Assignees

• Terumo Corp

Inventors

• Utsugida Tomoki

Classifications

• A61M2205/502

  User interfaces, e.g. screens or keyboards · CPC title

• A61M39/281

  Automatic tube cut-off devices, e.g. squeezing tube on detection of air · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• A61M1/367

  Circuit parts not covered by the preceding subgroups of group A61M1/3621 · CPC title

• A61M2205/3306

  Optical measuring means · CPC title