Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-02-08
1997-12-30
Buiz, Michael Powell
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604151, 604280, 604282, A61M 2500
Patent
active
057023727
ABSTRACT:
An infusion catheter for delivering drugs or other agents to selected sites in an organism, such as a human. In an alternate embodiment, a catheter system is disclosed having an infusion catheter and a pump that may be implanted or disposed outside the organism. In either embodiment, the free end of the catheter bears a rounded tip that has at least one elution hole for discharging an agent or drug to a selected site. The catheter has a tubular inner liner that is integral with the tip. The inner liner and tip are formed from a drug compatible polymeric material that is relatively nonporous and unreactive with the agent to be infused. A biocompatible flexible elastomeric tubular jacket surrounds the inner liner and a portion of the tip excluding that portion containing the elution hole or holes. Since the agent flowing in the catheter is isolated from the jacket while flowing through the catheter, and since the inner liner is relatively nonporous and unreactive with the agent to be infused, the agent is prevented from diffusing out of the catheter, adsorbing to the surface of the biocompatible jacket, reacting adversely with the jacket material or becoming exposed to substances diffusing through the jacket.
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"Intraspinal Drug Delivery" Medtronic Product Manual, UC9100612bEN NP-133ob, Medtronic, Inc. 1992.
Buiz Michael Powell
Kinghhorn Curtis D.
Medtronic Inc.
Patton Harold R.
Smith Chalih
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