Device for Minimally Invasive Delivery of Treatment Substance

摘要

Systems, methods, and devices for delivering ablation fluid to a location of interest within a body (e.g., a location with the lung) are described herein. Ablation fluid delivery systems and devices can include flexible delivery needles within which a plurality of smaller flexible needles is housed. The smaller flexible needles can be configured to articulate or bend with respect to the flexible delivery needle to increase an effective delivery area for the ablation fluid. The smaller flexible needles can include apertures or other openings to facilitate delivery of the ablation fluid to the location of interest.

主权项

1. A needle assembly for delivery of a treatment substance to a site within the body, the needle assembly comprising:
a delivery needle defining a delivery lumen and having a delivery needle wall, a proximal end, and a distal end, the delivery needle wall having one or more cut patterns to increase the flexibility of the delivery needle; a plurality of internal needles, each internal needle defining an internal needle lumen and having an internal needle wall, a proximal end, and a distal end, the plurality of needles configured to transition between a contracted position and an expanded position; and a treatment substance source in fluid communication with the internal needle lumens of the plurality of internal needles;
wherein each of the plurality of internal needles is configured to extend in a distal direction and flare outward from the distal end of the delivery needle when in the expanded position; andwherein the plurality of internal needles are housed within the delivery lumen when in the contracted position.