US 8,948,848 B2Granted

Angiography catheter

AssigneeInnovative Cardiovascular Solutions, LLC

InventorWilliam M Merhi

Life of this patent

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Abstract

Embolic protection devices and methods for capturing embolic debris. An embolic protection device includes a pigtail catheter having a lumen for housing a guidewire. The distal portion of the catheter has one or more apertures in fluid communication with the lumen and one or more radiopaque markers on the distal-most section. The device includes a self-expanding filter coupled to a side of the catheter and a movable outer sheath surrounding the catheter. The outer sheath holds the filter in a collapsed configuration when surrounding the filter. The outer sheath is proximally retracted to deploy the filter. A method of capturing embolic debris includes inserting a guidewire into a body lumen, tracking the device over the guidewire, retracting the guidewire, positioning the device using the radiopaque marker, retracting the outer sheath and deploying the filter, performing a procedure, and advancing the outer sheath to recapture the filter.

Claims26

Dependent claims

A method of capturing embolic debris during a closed heart surgical procedure, the method comprising:

inserting a distal end of an angiography catheter into a first body lumen of a patient by tracking a lumen of the catheter over a guidewire percutaneously inserted into the first body lumen, the angiography catheter comprising:
a proximal end and a distal end, the lumen extending from the proximal end to the distal end;
a distal portion comprising a longitudinally-extending radiopaque marker;
a self-expanding embolic filter attached to a side of the catheter proximal to the distal portion;
and
an outer sheath containing the embolic filter in a collapsed configuration;
removing the guidewire from the lumen of the catheter, the distal portion of the catheter assuming a generally arcuate shape being at least a semi-circle upon removing the guidewire from the distal portion of the catheter;
positioning the catheter by visualizing the radiopaque marker with an imaging technique;
and
longitudinally proximally retracting the outer sheath and allowing the embolic filter to assume an expanded, deployed configuration having a distal opening that faces the distal portion of the catheter and substantially spanning the body lumen,
wherein the distal opening of the embolic filter faces the upstream direction of blood flow.

8 more elements

An embolic protection device comprising:

an angiography catheter having a proximal end, a distal end, and a lumen extending from the proximal end of the catheter to the distal end of the catheter, the lumen configured to house a guidewire, a distal portion of the catheter configured to assume a generally arcuate shape being at least a semi-circle;
the distal portion of the catheter comprising a longitudinally-extending radiopaque marker configured to be arcuate and on a distal-most section of the catheter when the distal portion is in the generally arcuate shape;
a self-expanding embolic filter coupled to a side of the catheter proximal to the distal portion, the embolic filter having a generally conical shape, the embolic filter comprising a distal opening having an elliptical shape and extending proximally from the distal opening to a closed proximal end;
wherein the distal opening of the embolic filter faces the distal portion and is attached to a self-expanding frame configured to self-expand to a radially expanded open configuration;
and
a deployment mechanism circumferentially around at least a portion of the catheter and longitudinally movable with respect to the catheter, the deployment mechanism configured to contain the embolic filter in a collapsed configuration, and the embolic filter configured to self-expand upon longitudinal proximal retraction of the deployment mechanism.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/311,265Filed 5 Dec 2011 · us provisional application
Priority: 7 Jan 2011
Published: US 2012/0179033 A112 Jul 2012
Granted: 3 Feb 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61F 2/013
Filters implantable into blood vessels: distal protection devices, i.e. devices placed distally in combination with another endovascular…
A61B 6/12
Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment: arrangements…
A61B 18/1492
Probes or electrodes therefor: having a flexible, catheter-like structure, e.g. for heart ablation
A61B 2017/00243
Type of minimally invasive operation: cardiac