US 11,051,761 B2
Intravascular imaging catheters and methods of use thereof
Brian Courtney, Toronto (CA); Isaac Jourard, Toronto (CA); and Deniz Jafari, Sharon (CA)
Assigned to SUNNYBROOK RESEARCH INSTITUTE, Toronto (CA)
Filed by SUNNYBROOK RESEARCH INSTITUTE, Toronto (CA)
Filed on Jun. 15, 2016, as Appl. No. 15/183,576.
Claims priority of provisional application 62/175,968, filed on Jun. 15, 2015.
Claims priority of provisional application 62/187,047, filed on Jun. 30, 2015.
Prior Publication US 2016/0361018 A1, Dec. 15, 2016
Int. Cl. A61B 5/00 (2006.01); A61B 8/12 (2006.01); A61B 8/00 (2006.01); A61B 5/02 (2006.01)
CPC A61B 5/6852 (2013.01) [A61B 5/0084 (2013.01); A61B 8/12 (2013.01); A61B 8/445 (2013.01); A61B 5/0066 (2013.01); A61B 5/02007 (2013.01); A61B 5/6851 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An intravascular imaging catheter comprising:
a proximal elongate sheath comprising a first lumen;
a rotatable imaging conduit having a proximal portion housed within the first lumen and a distal portion extending beyond a distal end of said proximal elongate sheath;
an imaging assembly connected to said rotatable imaging conduit at a location that is remote from a proximal end of said rotatable imaging conduit, wherein a proximal end of said proximal elongate sheath is connectable to a motor drive unit for imparting rotation to said rotatable imaging conduit and said imaging assembly, and wherein said imaging assembly is configured for side viewing such that imaging energy is emitted and received at an angle relative to a longitudinal axis of said rotatable imaging conduit for collection of cross-sectional images as said imaging assembly is rotated; and
a distal elongate microcatheter sheath configured to be insertable within a vasculature of a subject, said distal elongate microcatheter sheath comprising a second lumen, wherein the second lumen is in fluid communication with a distal opening formed at a distal end of said distal elongate microcatheter sheath, said distal end of said proximal elongate sheath being connectable to a proximal end of said distal elongate microcatheter sheath;
wherein said intravascular imaging catheter resides in a disconnected state such that said proximal elongate sheath is disconnected from said distal elongate microcatheter sheath and such that said distal portion of said rotatable imaging conduit extends from said distal end of said proximal elongate sheath without residing within the second lumen of said distal elongate microcatheter sheath; and
wherein a distal region of said distal elongate microcatheter sheath comprises a partial internal stop configured such that when said distal portion of said rotatable imaging conduit is inserted into and extended within the second lumen of said distal elongate microcatheter sheath and said distal end of said proximal elongate sheath is connected to a proximal end of said distal elongate microcatheter sheath, said partial internal stop prevents passage of said imaging assembly beyond the distal end of the distal elongate microcatheter sheath, thereby protecting anatomy residing distal to the distal opening from rotating components of said intravascular imaging catheter and enabling extension of the imaging assembly to a location adjacent to said distal region for the collection of the cross-sectional images.