Determining catheter status
First Claim
1. A method for determining status of an implanted catheter, the catheter having a delivery region intended to be positioned in a target location of a patient, the delivery region being in communication with a lumen of the catheter, the method comprising:
- measuring pressure within the lumen of the catheter;
developing a physiological pressure modulation profile based on the measured pressure;
infusing or withdrawing a bolus of fluid into or from the lumen of the catheter;
measuring pressure within the lumen of the catheter created by the bolus;
developing a bolus pressure modulation profile based on the measured bolus pressure; and
determining the status of the catheter by comparing the developed bolus pressure modulation profile to a predetermined bolus pressure profile and by comparing the developed physiological pressure modulation profile to a predetermined physiological pressure profile of the target location.
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Accused Products
Abstract
A method for monitoring the status of an implanted catheter includes monitoring changes in pressure within a lumen of a catheter associated with physiological parameters (“physiological pressure”) and changes in pressure within the lumen of the catheter associated with bolus infusion of fluid into the catheter or bolus withdrawal of infusion from the catheter (“bolus pressure”). Methods that employ monitoring both physiological pressure and bolus pressure can provide information that cannot be obtained from monitoring physiological pressure or bolus pressure alone.
152 Citations
13 Claims
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1. A method for determining status of an implanted catheter, the catheter having a delivery region intended to be positioned in a target location of a patient, the delivery region being in communication with a lumen of the catheter, the method comprising:
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measuring pressure within the lumen of the catheter; developing a physiological pressure modulation profile based on the measured pressure; infusing or withdrawing a bolus of fluid into or from the lumen of the catheter; measuring pressure within the lumen of the catheter created by the bolus; developing a bolus pressure modulation profile based on the measured bolus pressure; and determining the status of the catheter by comparing the developed bolus pressure modulation profile to a predetermined bolus pressure profile and by comparing the developed physiological pressure modulation profile to a predetermined physiological pressure profile of the target location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification