Systems and methods to address air, leaks and occlusions in an insulin pump system
First Claim
1. A method for determining the presence of air in a cartridge or infusion tube set comprising:
- inserting a cartridge into a pump, at least one of the cartridge and an infusion tube set being sealed;
moving a cartridge plunger a predetermined distance into the cartridge at a first time;
measuring a first pressure in the at least one of the cartridge and the infusion tube set while the cartridge plunger is moved the predetermined distance; and
determining the at least one of the cartridge and an infusion tube set contains some amount of air if the pressure measurement is less than a specified pressure,wherein moving the cartridge plunger the predetermined distance includes gradually moving the plunger over a period of time until the predetermined plunger position is reached, and measuring the first pressure in the cartridge and the infusion set tube includes measuring a pressure rate of change in the at least one of cartridge and the infusion tube set over the period of time.
8 Assignments
0 Petitions
Accused Products
Abstract
A system and method for adjusting insulin infusion volume based on air in an infusion set tube includes inputting at least one location and length of an air bubble along the infusion set tube. An air bubble volume is determined in the infusion set tube. An insulin infusion volume is determined based on a desired insulin infusion. A determination is then made whether the desired insulin infusion would include the air bubble volume based on the inputted location and length of the air bubble. The air bubble volume is added to the insulin infusion volume to make an adjusted insulin infusion volume if the insulin infusion volume includes the air bubble.
86 Citations
24 Claims
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1. A method for determining the presence of air in a cartridge or infusion tube set comprising:
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inserting a cartridge into a pump, at least one of the cartridge and an infusion tube set being sealed; moving a cartridge plunger a predetermined distance into the cartridge at a first time; measuring a first pressure in the at least one of the cartridge and the infusion tube set while the cartridge plunger is moved the predetermined distance; and determining the at least one of the cartridge and an infusion tube set contains some amount of air if the pressure measurement is less than a specified pressure, wherein moving the cartridge plunger the predetermined distance includes gradually moving the plunger over a period of time until the predetermined plunger position is reached, and measuring the first pressure in the cartridge and the infusion set tube includes measuring a pressure rate of change in the at least one of cartridge and the infusion tube set over the period of time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for determining whether there is a leak in is cartridge or infusion tube set:
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inserting a cartridge into a pump, wherein at least the cartridge is sealed when inserted; moving a cartridge plunger a specified distance into the cartridge; maintaining the cartridge plunger at the specified distance over a first time period; measuring a first pressure in the cartridge during the first time period; measuring a second pressure in the cartridge during the first time period and after the first pressure measurement; and determining at least one of the cartridge or the infusion tube set contains a leak if the second pressure measurement is less than the first pressure measurement. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for determining the presence of air and leaks in a cartridge and infusion tube set comprising:
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inserting a cartridge into a pump; sealing at least one of the cartridge and an infusion tube set; gradually moving a cartridge plunger into the cartridge a specified distance over a first time period; maintaining the cartridge plunger at the specified distance over a second time period; measuring a first pressure rate of change in the cartridge over the first period of time; determining the at least one of the cartridge and an infusion tube set contains some amount of air or a substantial leak if the first pressure rate of change is less than a specified pressure rate of change; measuring a first pressure in the cartridge over the second period of time; measuring a second pressure in the cartridge over the second period of time; and determining the at least one of the cartridge and the infusion tube set has a leak if the second pressure measurement is less than the first pressure measurement. - View Dependent Claims (14, 15)
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16. A system for determining the presence of air in a cartridge or an infusion tube set comprising:
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an infusion pump housing sized and shaped to receive the cartridge; a pump mechanism within the infusion pump housing, the pump mechanism configured to gradually move a cartridge plunger into the cartridge a specified distance over a first time period, the pump mechanism configured to gradually move the cartridge plunger back the specified distance over a second time period; a pressure sensor within the infusion pump housing, the pressure sensor is configured to measure first and second pressures in the cartridge over the first period of time; a controller coupled with the pump mechanism and the pressure sensor, the controller including; a pressure rate of change determination module configured to determine a first pressure rate of change in the cartridge based on the first and second pressure measurements, a comparison module configured to compare the first pressure rate of change with a specified pressure rate of change, and an alert module configured to provide an alert indicating the presence of air or a large leak in at least one of the cartridge or infusion tube set if the first pressure rate of change is less than the specified pressure rate of change. - View Dependent Claims (17, 18, 19)
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20. A system for determining whether there is a leak in a cartridge or an infusion tube set comprising:
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an infusion pump housing sized and shaped to receive the cartridge; a pump mechanism disposed within the infusion pump housing, the pump mechanism is configured to apply a specified pressure to the cartridge over a first time period; a pressure sensor disposed within the infusion pump housing, the pressure sensor is configured to measure first and second pressures in the cartridge over the first period of time, the second pressure measurement after the first pressure measurement; a controller including; a comparison module configured to compare the second pressure measurement with the first pressure measurement, and an alert module configured to provide an alert indicating a leak in at least one of the cartridge or an infusion tube set if the second pressure measurement is less than the first pressures measurement. - View Dependent Claims (21, 22, 23, 24)
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Specification