Embolic protection system
Configurations are described for assisting execution of a percutaneous procedure while protecting the vascular pathway to the target treatment area. One example is directed to an embolic protection system for deploying a device to a distal location across a diseased vessel, the embolic protection system which may include an expandable introducer, an embolic protection device, and a loading sleeve.
1. An embolic protection
device including:
a catheter shaft;
an expandable filter provided at a distal end of the catheter shaft;
a filter actuator located at or towards a proximal end of the embolic protection device, the filter actuator operable to open and close a mouth of the expandable filter, wherein the mouth of the expandable filter includes a hoop wire connected by an actuation wire to the filter actuator; and
a filter dilator insertable into a lumen of the catheter shaft, wherein the filter dilator comprises a filter dilator tip, and wherein the filter dilator tip includes a circumferential channel to capture or retain the hoop wire of the mouth of the expandable filter when the mouth of the expandable filter is closed by the actuation wire.
2. The embolic protection device of claim 1 , wherein the embolic protection device further comprises:
a catheter hub including a hemostasis valve to seal and guide the filter dilator when inserted into the lumen of the catheter shaft;
a first connector for receiving a proximal end of the catheter shaft; and
a second connector for connection to a flushing stopcock.
3. The embolic protection device of claim 1 , wherein movement of a slider of the filter actuator by an operator causes a corresponding contraction or expansion of the hoop wire thereby to close or open the mouth of the expandable filter.
4. The embolic protection device of claim 1 , wherein the actuation wire is at least partly carried in a tubular rail provided at a distal end of the catheter shaft.
5. The embolic protection device of claim 1 , wherein the filter actuator includes a locking mechanism operable to lock the closed mouth of the expandable filter in the circumferential channel in the filter dilator tip.
6. An embolic protection system for deploying a therapeutic device into a vasculature, the embolic protection system comprising:
an embolic protection device including:
a catheter shaft;
an expandable filter provided at a distal end of the catheter shaft;
a filter actuator located at or towards a proximal end of the embolic protection device, the filter actuator operable to open and close a mouth of the expandable filter, wherein the mouth of the expandable filter includes a hoop wire connected by an actuation wire to the filter actuator; and
a filter dilator insertable into a lumen of the catheter shaft, wherein the filter dilator comprises a filter dilator tip, and wherein the filter dilator tip includes a circumferential channel to capture or retain the hoop wire of the mouth of the expandable filter when the mouth of the expandable filter is closed by the actuation wire; and
an expandable introducer to at least assist in introducing the embolic protection device into the vasculature.
7. The embolic protection system of claim 6 , wherein the embolic protection system includes a peel-away loading sleeve configured structurally to guide the embolic protection device into the expandable introducer, the loading sleeve comprising separable elements that can be parted by an operator to remove the loading sleeve from the embolic protection device, the separable elements defining, before separation, a lumen of the loading sleeve, the lumen sized to receive the embolic protection device into the expandable introducer.
8. The embolic protection system of claim 7 , wherein the separable elements, before separation, are locked together by a twist-off locking cap, wherein removal by an operator of the locking cap allows separation of the separable elements.