DETERMINING CATHETER STATUS
First Claim
1. A method for determining status of a catheter of an implantable infusion system, wherein the infusion system includes an implantable infusion device operably coupled to the 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 implantable infusion device (i) configured to cause an agent stored in a reservoir to be delivered via the delivery region of the catheter through the lumen of the catheter, and (ii) having a port in communication with the lumen of the catheter, the method comprising:
- inserting a distal end of a probe into the port, the probe having a lumen, wherein the lumen of the probe is in communication with the catheter when the distal end of the probe is inserted into the port, and wherein the lumen of the probe is in communication with a pressure sensor;
measuring pressure via the pressure sensor;
developing a pressure modulation profile based on the measured pressure; and
comparing the developed pressure modulation profile to a predetermined pressure profile of the target location.
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Accused Products
Abstract
A method for determining the status of a catheter of an implanted infusion system, where the catheter is intended to deliver a fluid composition to CSF of a patient, includes monitoring catheter pressure, developing a pressure modulation profile based on the monitored pressure, and comparing the developed pressure modulation profile to a predetermined pressure profile. The predetermined pressure profile may be a profile of cerebrospinal fluid or a bolus infusion or withdrawal profile for the catheter. A determination of catheter status, such as properly functioning, occluded or leaky, can be made based on the comparison.
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Citations
26 Claims
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1. A method for determining status of a catheter of an implantable infusion system, wherein the infusion system includes an implantable infusion device operably coupled to the 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 implantable infusion device (i) configured to cause an agent stored in a reservoir to be delivered via the delivery region of the catheter through the lumen of the catheter, and (ii) having a port in communication with the lumen of the catheter, the method comprising:
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inserting a distal end of a probe into the port, the probe having a lumen, wherein the lumen of the probe is in communication with the catheter when the distal end of the probe is inserted into the port, and wherein the lumen of the probe is in communication with a pressure sensor; measuring pressure via the pressure sensor; developing a pressure modulation profile based on the measured pressure; and comparing the developed pressure modulation profile to a predetermined pressure profile of the target location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for determining status of a catheter of an implantable infusion system, wherein the infusion system includes an implantable infusion device operably coupled to the catheter, the catheter having a delivery region for delivering fluid to a target location of a patient, the delivery region being in communication with a lumen of the catheter, the implantable infusion device (i) configured to cause an agent stored in a reservoir to be delivered via the delivery region of the catheter through the lumen of the catheter, and (ii) having a port in communication with the lumen of the catheter, the method comprising:
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inserting a distal end of a probe into the port, the probe having a lumen, wherein the lumen of the probe is in communication with the catheter when the distal end of the probe is inserted into the port, and wherein the lumen of the probe is in communication with a pressure sensor; infusing or withdrawing a bolus of fluid into the lumen of the catheter; measuring pressure created by the bolus via the pressure sensor; developing a bolus pressure modulation profile based on the measured bolus pressure; and comparing the developed bolus pressure modulation profile to a predetermined bolus pressure profile. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system for determine whether an implanted infusion system has catheter complications, the catheter having a lumen for fluid delivery and having an inner diameter defined by the lumen, the system comprising:
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a probe having a lumen defining an inner diameter, wherein the inner diameter of the probe is 60% or less than 60% of the inner diameter of the catheter; and a pressure sensor operably coupled to the tube and configured to measure pressure in the lumen of the probe. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification