Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1997-08-18
2000-07-25
Stright, Jr., Ronald K.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604151, 604264, 604523, 128898, 128DIG12, A61M 3100
Patent
active
060931809
ABSTRACT:
An intraparenchymal infusion catheter system for delivering drugs or other agents to selected sites in an organism, such as a human, includes a pump that may be implanted or disposed outside the organism. A catheter is coupled to the pump. The catheter comprises a flexible biocompatible tubular portion terminating in a free distal end. The distal end of the catheter bears a rounded tip, a portion of which is slidably disposed within the lumen of the tubular portion. The tip is porous for discharging an agent or drug to a selected site. The tip has a microporosity of less than or equal to 0.22 microns. The tubular portion is composed from a material that will expand from its nominal size when exposed to a stimulus such as heat or a solvent and return to its nominal size when the stimulus is withdrawn. By expanding the tubular portion, a physician can select the amount of the tip that is exposed to the organism, thereby customizing the catheter to the structural size of the selected site within the body.
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Kinghorn Curtis D.
Medtronic Inc.
Patton Harold R.
Stright Jr. Ronald K.
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