Ambulatory Infusion Devices And Methods With Blockage Detection
First Claim
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1. A method of operating an infusion device including a fluid transfer device and a catheter, the method comprising the steps of:
- transferring fluid to the catheter with the fluid transfer device a plurality of times during a measurement window;
sensing catheter pressure a plurality of times during the measurement window; and
determining whether an increase in sensed pressure during the measurement window corresponds to an increase in sensed pressure that would result from a catheter blockage.
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Abstract
Infusion devices with blockage detection capability and methods of monitoring infusion devices.
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Citations
20 Claims
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1. A method of operating an infusion device including a fluid transfer device and a catheter, the method comprising the steps of:
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transferring fluid to the catheter with the fluid transfer device a plurality of times during a measurement window; sensing catheter pressure a plurality of times during the measurement window; and determining whether an increase in sensed pressure during the measurement window corresponds to an increase in sensed pressure that would result from a catheter blockage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating an infusion device including a fluid transfer device and an outlet, the method comprising the step of:
signaling that a blockage has been detected in response to consistent blockage-based additions to outlet pressure that are within a predetermined range and persist over a relatively long measurement window. - View Dependent Claims (9, 10, 11)
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12. An infusion device for use with a catheter, comprising:
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an outlet port configured to be secured to the catheter; a fluid transfer device operably connected to the outlet port; a pressure sensor located between the fluid transfer device and the outlet port; and a controller configured to differentiate between increases in sensed pressure that are the result of environmental pressure changes and increases in sensed pressure that are the result of a catheter blockage. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An infusion device for use with a catheter, comprising:
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an outlet port configured to be secured to the catheter; a fluid transfer device operably connected to the outlet port; a pressure sensor located between the fluid transfer device and the outlet port; and means for storing a plurality of pressures sensed during a measurement window; and means for determining whether an increase in sensed pressure during the measurement window corresponds to an increase in sensed pressure that would result from a catheter blockage. - View Dependent Claims (20)
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Specification