IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0253642
(2011-10-05)
|
등록번호 |
US-8267893
(2012-09-18)
|
발명자
/ 주소 |
- Moberg, Sheldon B.
- Hanson, Ian B.
- Talbot, Cary D.
|
출원인 / 주소 |
|
대리인 / 주소 |
Pillsbury Winthrop Shaw Pittman LLP
|
인용정보 |
피인용 횟수 :
33 인용 특허 :
109 |
초록
▼
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 pist
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 a series of measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system.
대표청구항
▼
1. An infusion pump for infusing fluid from a reservoir into a body of a user, the infusion pump comprising: a housing;a drive mechanism including a motor and one or more drive components contained within the housing and operatively coupled to the reservoir to deliver fluid from the reservoir throug
1. An infusion pump for infusing fluid from a reservoir into a body of a user, the infusion pump comprising: a housing;a drive mechanism including a motor and one or more drive components contained within the housing and operatively coupled to the reservoir to deliver fluid from the reservoir through a fluid path into the body of the user;one or more electronic components to take a series of measurements of a parameter associated with the motor or one of the drive train components; anda controller contained within the housing, wherein the controller calculates a weighted average of the series of measurements by applying a weighting factor to each measurement in the series of measurements to determine a weighted value corresponding to each said measurement and calculating the average of the weighted values, determines the drive count of the motor, determines a drive count value based on the drive count of the motor, calculates a maximum threshold value based on the drive count value, compares the weighted average to the maximum threshold value, and determines whether an occlusion has occurred in the fluid path of the infusion pump by determining whether the weighted average is greater than the maximum threshold value. 2. The infusion pump of claim 1, wherein the parameter is force. 3. The infusion pump of claim 1, further including an alarm configured to activate if a determination is made that the weighted average is greater than the maximum threshold value. 4. The infusion pump of 1, wherein the drive count value is X when the drive count of the motor is within a first range of drive counts, wherein the drive count value is Y when the drive count of the motor is within a second range of drive counts, wherein the drive counts within the first range are less than the drive counts within the second range, and wherein Y is less than X. 5. The infusion pump of claim 1, wherein the controller calculates the maximum threshold value by multiplying the drive count value by a predetermined conversion value. 6. The infusion pump of claim 5, wherein the predetermined conversion value is calculated from a formula including at least one factor selected from the group consisting of current, time of powering the motor, drive count, coast count, and standard deviation of force readings. 7. The infusion pump of claim 1, wherein the controller removes the highest weighted value and the lowest weighted value prior to calculating the average of the weighted values. 8. The infusion pump of claim 1, wherein, after each measurement in the series of measurements is taken, the controller compares the measurement to a predetermined lower threshold value before the next measurement in the series of measurements is taken, and wherein if the comparison indicates that the measurement taken is less than the predetermined lower threshold value, the controller determines that there is no occlusion. 9. The infusion pump of claim 8, wherein the predetermined lower threshold value is equal to N multiplied by a predetermined conversion value, wherein N is less than 1.0. 10. The infusion pump of claim 1, wherein the series of measurements includes at least three measurements, and the controller filters the series of measurements to remove at least two measurements before calculating the weighted values. 11. The infusion pump of claim 10, wherein the at least two measurements are the highest measurement and the lowest measurement. 12. The infusion pump of claim 10, wherein the series of measurements includes at least five measurements, and the controller further removes the highest weighted value and the lowest weighted value prior to calculating the average of the weighted values. 13. The infusion pump of claim 1, wherein the one or more electronic components include a sensor to measure force. 14. The infusion pump of claim 1, wherein the one or more electronic components include an encoder to measure motor drive count. 15. The infusion pump of claim 1, wherein each measurement after the first measurement in the series of measurements is taken a predetermined time after the previous measurement.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.