Methods and apparatuses for detecting occlusions in an ambulatory infusion pump
First Claim
1. A method of detecting an occlusion in an infusion pump having a drive mechanism that includes a motor and one or more drive train components coupled to a reservoir for infusing fluid from the reservoir into a body of a user, the method comprising:
- (a) measuring a first value, said first value being equal to the magnitude of force applied to a drive train component;
(b) measuring a second value, said second value being equal to the magnitude of a parameter associated with the motor or one of the drive train components, and said parameter being selected from the group consisting of drive current, drive voltage, motor drive time, motor coast time, delivery pulse energy, motor drive count, motor coast count, and delta encoder count;
(c) adding said first value to said second value to obtain a first combined value; and
(d) determining whether an occlusion has occurred by using the first combined value.
1 Assignment
0 Petitions
Accused Products
Abstract
An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. A method, system, and an article of manufacture for automatically detecting an occlusion in a medication infusion pump is provided. The electrical current to an infusion pump is measured. Based on measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system. The methods of detecting occlusions may be dynamic.
-
Citations
19 Claims
-
1. A method of detecting an occlusion in an infusion pump having a drive mechanism that includes a motor and one or more drive train components coupled to a reservoir for infusing fluid from the reservoir into a body of a user, the method comprising:
-
(a) measuring a first value, said first value being equal to the magnitude of force applied to a drive train component; (b) measuring a second value, said second value being equal to the magnitude of a parameter associated with the motor or one of the drive train components, and said parameter being selected from the group consisting of drive current, drive voltage, motor drive time, motor coast time, delivery pulse energy, motor drive count, motor coast count, and delta encoder count; (c) adding said first value to said second value to obtain a first combined value; and (d) determining whether an occlusion has occurred by using the first combined value. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of detecting an occlusion in an infusion pump having a drive mechanism that includes a motor and one or more drive train components coupled to a reservoir for infusing fluid from the reservoir into a body of a user, the method comprising:
-
(a) measuring a first value, said first value being equal to the magnitude of force applied to a drive train component; (b) measuring a second value, said second value being equal to the magnitude of a parameter associated with the motor or one of the drive train components, and said parameter being selected from the group consisting of drive voltage, motor drive time, motor coast time, delivery pulse energy, motor drive count, motor coast count, and delta encoder count; (c) multiplying said first value by said second value to obtain a first combined value; and (d) determining whether an occlusion has occurred by using the first combined value. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
-
14. A method of detecting an occlusion in an infusion pump having a drive mechanism that includes a motor and one or more drive train components coupled to a reservoir for infusing fluid from the reservoir into a body of a user, the method comprising:
-
(a) measuring a first value, said first value being equal to the magnitude of force applied to a drive train component; (b) measuring a second value, said second value being equal to the magnitude of the motor'"'"'s drive current; (c) multiplying said first value by said second value to obtain a first combined value; and (d) determining whether an occlusion has occurred by using the first combined value. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification