Angiography catheter

摘要

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.

主权项

1. 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; andan 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.