US 7,678,077 B2Granted

Variable depth injection device and method

AssigneeBoston Scientific Scimed, Inc.

InventorsChad G. Harris, Matthew L. Hawk, Timothy J. Mickley

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Abstract

An apparatus for the injection of therapeutic and other agents at a target site within a patient's body. A catheter including a first elongated shaft having a distal end and a proximal end and a lumen extending therebetween. The catheter also including a second elongated shaft slidingly disposed in the first elongated shaft, the second elongated shaft having a distal end and a proximal and a lumen extending therebetween. The catheter further including a third elongated shaft disposed in and attached to the second elongate shaft, the third elongated shaft to move in a one-to-one relationship with the first elongated shaft and the second elongated shaft to maintain a predetermined needle deployment length as each are subjected to various bend configurations.

Claims7

Dependent claims

An injection catheter comprising:

a first elongated shaft having a distal end and a proximal end and a first lumen extending therebetween;
a needle with a proximal end and a distal end and a needle lumen extending therebetween, the needle disposed within the first lumen of the elongated shaft and extending from a proximal end of the catheter to a distal end of the catheter;
a stop collar disposed within the first lumen of the first elongated shaft near the distal end of the needle;
the stop collar having a portion thereon configured to prevent lateral movement of the stop collar within the first elongated shaft;
a first set of threads located on the needle;
and
a second set of threads located on the stop collar;
wherein rotation of the needle within the first elongated shaft causes longitudinal movement of the stop collar relative to the needle within the first elongated shaft, the positioning of the stop collar within the first elongated shaft controlling a variable extent to which the needle may be extended beyond the distal end of the first elongated shaft.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/781,775Filed 20 Feb 2004
Published: US 2005/0187519 A125 Aug 2005
Granted: 16 Mar 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61M 25/0606
Body-piercing guide needles or the like: "Over-the-needle" catheter assemblies, e.g. I.V. catheters
A61M 25/0068
Characterised by the distal end, e.g. tips: static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
A61M 25/0084
Catheter tip comprising a tool: being one or more injection needles
A61M 25/0069
Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure: tip not integral with tube