Pressure monitoring enteral feeding system and method

• US 5,514,102 A
• Filed: 05/05/1995
• Issued: 05/07/1996
• Est. Priority Date: 05/05/1995
• Status: Expired due to Term

• Current Assignee: Zevex (Moog Incorporated)
• Original Assignee: Zevex (Moog Incorporated)
• Inventors: Dumas, Chris, Winterer, Sean
• Primary Examiner(s): Maglione, Corrine M.
• Assistant Examiner(s): GRING, NOELLE K
• Application Number:
  US08/435,714
• Time in Patent Office: 368 Days
• Field of Search: 604/65, 604/30, 604/31, 604/34, 604/66, 604/67, 604/118, 604/119, 604/246
• US Class Current: 604/67
• CPC Class Codes: A61M 2202/0482 Enteral feeding product
• 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 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: G16H 20/17 delivered via infusion or injection

Abstract

A pressure monitoring enteral feeding system and method are disclosed including a housing having a pair of channels for receiving a pump tubing segment which connects an intake line and an output line of a delivery set, and for holding the pump tubing segment adjacent a motor unit. A pair of pressure sensors are disposed along the channels to monitor the pressure in the pump tubing segment so as to warn a user when an undesirable pressure has developed either upstream or downstream from the motor unit, and to adjust rate based on the upstream pressure. The housing may also include a lockable cover to securely hold the pump tubing segment in the channels and in firm contact with the pressure sensors.

Claims

1. A medical fluid delivery system comprising:

a motor unit for pumping medical fluids;

a disposable delivery set for engagement with said motor unit for conveying medical fluids disposed with the delivery set as the motor unit periodically engages the delivery set;

housing means disposed adjacent the motor unit for receiving at least a portion of said delivery set; and

pressure sensing means disposed along the delivery set for determining pressure of fluids within the delivery set and for determining whether the delivery set is properly loaded within the housing means, the pressure sensing means comprising at least two pressure sensors, a first sensor being disposed so as to contact a portion of the delivery set proximal (upstream) from the motor unit, and a second sensor being disposed so as to contact a portion of the delivery set distal (downstream) from the motor unit.

2. The medical fluid delivery system of claim 1, wherein the pressure sensing means produces signals indicating pressure in the delivery set, and wherein the system further comprises, pump control means operationally connected to the pressure sensing means and the motor unit, for selectively changing operation of the motor unit in response to signals received from the pressure sensing means.

3. The medical fluid delivery system of claim 2, wherein the signals produced by the pressure sensing means include an AC component indicative of changing tension on the delivery set, and wherein the pump control means is responsive to the AC component of said pressure sensing means.

4. The medical fluid delivery system of claim 1, wherein the motor unit comprises a rotor mounted on the housing means and rotated by said motor unit and for receiving a portion of said delivery set so as to form a peristaltic pump.

5. The medical fluid delivery system of claim 4, wherein the sensors emit signals indicative of pressure within the delivery set, and wherein rotation of said motor unit is responsive to said signals.

6. The medical fluid delivery system of claim 4, wherein the first sensor is responsive to occlusions in the delivery set upstream from the rotor, and wherein the second sensor is responsive to occlusions in the delivery set downstream from the rotor.

7. The medical fluid delivery system of claim 6, wherein the pressure sensing means further comprises a user perceptible signal.

8. The medical fluid delivery system of claim 7, wherein both the first and second sensors are responsive to improper loading of the delivery set, such that improper loading of the delivery set causes the pressure sensing means to emit a user perceptible signal.

9. The medical fluid delivery system of claim 1, wherein the housing means comprises a pair of channels disposed in a generally parallel orientation for receiving a portion of the delivery set and holding said portion of the delivery set adjacent the motor unit.

10. The medical fluid delivery system of claim 9, further comprising cover means for holding the portion of the delivery set within the channels.

11. The medical fluid delivery system of claim 9, wherein the pressure sensors of the pressure sensing means are disposed along the channels.

12. An enteral feeding pump for attachment along a delivery set for delivering fluid to a patient having an intake line, an output line and a pump tubing segment connecting the intake and output lines, the feeding pump comprising:

a housing having a first channel for receiving an upstream portion of the pump tubing segment, a second channel for receiving a downstream portion of the pump tubing segment, a selectably engageable cover means for holding the pump tubing segment in the first and second channels and a motor unit disposed adjacent to the first and second channels so as to contact the pump tubing segment functionally between the intake line and output line when said pump tubing is disposed in the first and second channels,

pressure sensing means including a first pressure sensor disposed in the housing along the first channel responsive to the nonpresence of the upstream portion of the pump tubing segment within the first channel and responsive to changes in pressure within the upstream portion of the pump tubing segment, and a second pressure sensor disposed in the housing along the second channel responsive to the nonpresence of the downstream portion of the pump tubing segment within the channel and responsive to pressure changes within the downstream portion of the pump tubing segment, and

control means in communication with the pressure sensing means for emitting a user identifiable signal when the pump tubing segment is not disposed in the first channel, when the pump tubing segment is not disposed in the second channel, and when pressure in the pump tubing segment changes beyond a predetermined threshold.

13. The enteral feeding pump of claim 12, wherein the cover means comprises at least one projection for holding the upstream portion of the pump tubing segment in contact with the pressure sensing means.

14. The enteral feeding pump of claim 13, wherein the cover means comprises at least one projection for holding the downstream portion of the pump tubing segment in contact with the pressure sensing means.

15. The enteral feeding pump of claim 12, wherein the pressure sensing means conveys signals to the control means indicative of pressures sensed by the pressure sensing means, and wherein the pump further comprises a motor unit including a rotor means, the motor unit being disposed in communication with the control means for selectively controlling rotation of the rotor means responsive to signals received from the pressure sensing means.

16. The enteral feeding pump of claim 15, wherein the motor unit prevents the rotor means from rotating in response to signals from the control means indicative that the pump tubing segment is not properly loaded in the housing.

17. The enteral feeding pump of claim 15, wherein the motor unit prevents the rotor means from rotating in response to signals from the control means indicative that an occlusion exists along the delivery set.

18. The enteral feeding pump of claim 15, wherein the motor unit adjusts a rotation rate of the rotor means in response to signals from the control means indicative that an upstream pressure change has occurred.

19. A medical fluid delivery system comprising:

a motor unit for pumping medical fluids;

a disposable delivery set disposed so as to engage said motor unit such that rotation of the motor unit compresses the delivery set to thereby conveying medical fluids through the delivery set;

housing means disposed adjacent the motor unit for receiving at least a portion of said delivery set; and

pressure sensing means disposed in contact with the delivery set for determining tension pressure of fluids within the delivery set and for determining whether the delivery set is properly loaded within the housing means, the pressure sensing means comprising at least two pressure sensors, a first sensor being disposed in contact with the delivery set proximal (upstream) from the motor unit, and a second sensor being disposed in contact with the delivery set distal (downstream) from the motor unit.

20. The medical fluid delivery system of claim 19, wherein the pressure sensing means produces signals indicating pressure within the delivery set, and wherein the system further comprises, pump control means operationally connected to the pressure sensing means and the motor unit, for selectively changing operation of the motor unit in response to signals received from the pressure sensing means.

21. The medical fluid delivery system of claim 19, wherein the signals produced by the pressure sensing means include an AC component indicative of changing tension on the delivery set, and wherein the pump control means is responsive to the AC component of said pressure sensing means.