Method of removing debris corresponding with the R-wave
View Patent ↗A method and device for injecting and extracting fluid at a treatment site to remove debris from the site.
1. A method of removing debris from a treatment site comprising the steps of:
inflating a therapy balloon to provide a therapy and thereby occluding a vessel and making debris;
injecting fluid distal of said balloon when said balloon is deflated at a rate and at a time in the cardiac cycle corresponding to the R-wave component of the QRS complex in the electrographic waveform to displace debris into a guide sheath lumen placed proximal of the therapy balloon;
synchronizing the injection of fluid with the electrographic R-wave of the patient so as to inject at a time of low flow in the coronary arteries; and
removing debris and fluid from said guide sheath as fluid is injected.
2. The method of claim 1 for removing debris from a treatment site comprising the additional steps of:
at least partial occluding a vessel near a treatment site by inflating an occlusions balloon located on a guide sheath of the type having an open lumen, near the therapy site;
injecting fluid into the therapy site at a location distal of the therapy site during the intervention at a rate and quantity sufficient to displace the debris into said guide sheath lumen.
3. The method of claim 2 wherein said injecting step is preceded by a therapeutic intervention at a site proximal of said injection site.