Drug delivery systems and methods
First Claim
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1. A method of delivering a drug to a patient, comprising:
- inserting a delivery device into an intrathecal space of the patient;
measuring a respiration rate of the patient;
infusing a drug through the delivery device and into the intrathecal space, wherein the drug is infused in a pulsatile manner in coordination with or to override a natural cerebrospinal fluid (CSF) pulsation based on the respiration rate of the patient to urge the drug towards a target side within the patient; and
after infusing the drug, infusing a fluid out of the drug delivery device into the intrathecal space of the patient proximal to the drug such that infusion of the fluid moves the drug distally towards the target site within the patient.
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Abstract
Drug delivery systems and methods are disclosed herein. In some embodiments, a drug delivery system can be configured to deliver a drug to a patient in coordination with a physiological parameter of the patient (e.g., the patient'"'"'s natural cerebrospinal fluid (CSF) pulsation or the patient'"'"'s heart or respiration rate). In some embodiments, a drug delivery system can be configured to use a combination of infusion and aspiration to control delivery of a drug to a patient. Catheters, controllers, and other components for use in the above systems are also disclosed, as are various methods of using such systems.
41 Citations
25 Claims
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1. A method of delivering a drug to a patient, comprising:
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inserting a delivery device into an intrathecal space of the patient; measuring a respiration rate of the patient; infusing a drug through the delivery device and into the intrathecal space, wherein the drug is infused in a pulsatile manner in coordination with or to override a natural cerebrospinal fluid (CSF) pulsation based on the respiration rate of the patient to urge the drug towards a target side within the patient; and after infusing the drug, infusing a fluid out of the drug delivery device into the intrathecal space of the patient proximal to the drug such that infusion of the fluid moves the drug distally towards the target site within the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of delivering a drug to a patient, comprising:
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inserting a delivery device into an intrathecal space of the patient; measuring a respiration rate of the patient; infusing a drug through the delivery device and into the intrathecal space, wherein the drug is infused in a pulsatile manner in coordination with or to override a natural cerebrospinal fluid (CSF) pulsation based on the respiration rate of the patient to urge the drug towards a target site within the patient, the pulsatile manner created by infusing a first volume of the drug into the patient and withdrawing a second, smaller volume of the drug in a repeated process until a desired dose of the drug is delivered; and after infusing the drug, infusing a fluid out of the drug delivery device behind the drug such that infusion of the fluid enhances distribution of the drug or moves the drug towards the target site within the patient; wherein the drug and the fluid are infused as part of an infusion profile, and wherein a total volume of the fluid infused in the infusion profile is greater than a total volume of the drug infused in the infusion profile.
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Specification