Method of identifying a flow set for use with a pump

• US 8,025,654 B2
• Filed: 04/30/2008
• Issued: 09/27/2011
• Est. Priority Date: 04/04/2001
• Status: Expired due to Fees

• Current Assignee: Caesarea Medical Electronics, Ltd. (Becton, Dickinson & Co)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Barak, Swi
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): PATEL, PRITESH ASHOK
• Application Number:
  US12/112,368
• Publication Number:
  US 20080208124A1
• Time in Patent Office: 1,245 Days
• Field of Search: None
• US Class Current: 604/505
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/6045 having complementary physical shapes for indexing or registration purposes
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 5/1411 Drip chambers A61M5/162, A61M5/1689, A61M5/40 take precedence
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: A61M 5/1689 Drip counters

Abstract

A disposable flow set for use with a pump includes a first administration tube, at least one tube-segment having a first end and a second end, the first end connected to the first administration tube, a second administration tube connected to the second end of the at least one tube-segment; and an identifying key member connected to the at least one tube-segment. The identifying key member includes a number of teeth that define a unique code, including a combination of location and width. The teeth fit into compatible niches located in the pump.

Claims

1. A method of priming a flow set for use with a pump having a pressure sensor, the flow set comprising at least one administration tube and an anti-free-flow valve and having a predetermined interior volume, the method comprising:

(a) installing the flow set into the pump such that the at least one administration tube is operatively pressed against the pressure sensor of the pump;

(b) pumping liquid into the flow set;

(c) measuring the quantity of the liquid flowing into the flow set;

(d) measuring pressure of the liquid in the least one administration tube of the flow set using the pressure sensor;

(e) recognizing the first arrival of the liquid to the anti-free-flow valve by sensing a rise of pressure in the at least one administration tube;

(f) obtaining the volume of the liquid used to fill the flow set from the measurement of liquid flow quantity until a pressure rise reaches a predetermined high;

(g) comparing the volume of the liquid used to fill the flow set with the predetermined interior volume of the flow set; and

(h) if the volume of the liquid used to fill the flow set is different than the predetermined interior volume of the flow set, stopping the operation of the pump or activating an alarm, or both.

2. A method of identifying a flow set for use with a pump having a pressure sensor, the flow set comprising at least one administration tube and an anti-free-flow valve and having a predetermined interior volume, the method comprising:

(a) installing the flow set into the pump such that the at least one administration tube is operatively pressed against the pressure sensor of the pump;

(b) permitting flow of liquid into the flow set;

(c) using the anti-free-flow valve to enable passage of air therethrough and resistance to the flow of the liquid therethrough so as to enable a buildup of pressure in the flow set;

(d) recognizing the first arrival of the liquid to the anti-free-flow valve by sensing a rise of pressure in the at least one administration tube;

(e) using the pressure sensor to measure change in the pressure in the flow set and thereby determine when the flow set is filled with liquid;

(f) comparing the predetermined interior volume of the flow set with the volume of the liquid used to fill the flow set; and

(g) if the volume of the liquid used to fill the flow set is different than the predetermined interior volume of the flow set, stopping operation of the pump or activating an alarm, or both.

3. The method of claim 2 wherein the resistance of the anti-free-flow valve for air passing is significantly lower than the resistance of the anti-free-flow valve for liquid passing.

4. The method of claim 2 further comprising:

(a) removing the flow set from the pump after an injection procedure is completed;

(b) providing a second flow set for use with the pump;

(c) installing the second flow set in the pump; and

(d) confirming that the second flow set is compatible for use with the pump.