Administration set detection and authentication using cam profiles

• US 10,366,788 B2
• Filed: 08/22/2016
• Issued: 07/30/2019
• Est. Priority Date: 08/22/2016
• Status: Active Grant

• Current Assignee: Curlin Medical (Moog Incorporated)
• Original Assignee: Curlin Medical (Moog Incorporated)
• Inventors: Azapagic, Azur, Barkley, Mohan Jonathan
• Primary Examiner(s): Eisenberg, Rebecca E
• Assistant Examiner(s): Ahmed, Tasnim Mehjabin
• Application Number:
  US15/243,438
• Publication Number:
  US 20180050153A1
• Time in Patent Office: 1,072 Days
• 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 2205/3306 Optical measuring means
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/332 Force measuring means
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/60 with identification means
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• 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 5/16813 by controlling the degree of opening of the flow line
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/63 for local operation

Abstract

An administration set for an infusion pump includes a free-flow prevention device having a movable plunger that includes a cam surface defining an uneven profile along a direction of movement of the plunger, wherein the shape of the cam surface profile indicates the administration set is authorized for use with the infusion pump and may further indicate the specific type of administration set. A sensor in the infusion pump senses movement of the plunger as a platen of the infusion pump is latched and generates a profile signal in the time domain representative of the cam surface profile. A processor evaluates the profile signal and controls operation of the pump to protect a patient from improper loading of an administration set, use of an unauthorized administration set, and/or use of an invalid type of administration set for a chosen infusion protocol.

Claims

1. An administration set of a predetermined type for use with an infusion pump to administer a specified infusion protocol to a patient, wherein the predetermined type is chosen from a plurality of different administration set types, and wherein the infusion pump includes a follower, the administration set comprising:

tubing for conveying an infusion liquid; and

a free-flow prevention device operable to selectively stop and permit flow of the infusion liquid through the tubing;

wherein the free-flow prevention device includes a carrier and a plunger movable relative to the carrier between an open position permitting flow of the infusion liquid through the tubing and a closed position stopping flow of the infusion liquid through the tubing, the plunger being biased toward the closed position and having a cam surface defining an uneven profile along a direction of movement of the plunger;

wherein the cam surface is exposed through a slot in the carrier and is slidably engageable by the follower, and the cam surface profile is configured to displace the follower in an elevation direction orthogonal to the direction of movement of the plunger as the plunger is moved from the closed position to the open position;

wherein the cam surface profile indicates the administration set is authorized for use with the infusion pump.

2. The administration set according to claim 1, wherein the cam surface profile further indicates the predetermined type of the administration set.

3. The administration set according to claim 2, wherein the cam surface profile includes a first plateau and a second plateau having different respective elevations.

4. The administration set according to claim 3, wherein the first plateau and the second plateau have different respective lengths in the direction of movement.

5. The administration set according to claim 3, wherein the cam surface profile further includes a topographical feature between the first plateau and the second plateau.

6. The administration set according to claim 5, wherein the topographical feature is a bump, a ramp, or a recess.