US 11,890,431 B2
Steerable guide catheter
Darren Edminster, Brooklyn Park, MN (US); Douglas Wahnschaffe, Monticello, MN (US); and Steve Berhow, St. Michael, MN (US)
Assigned to CIRCA SCIENTIFIC, INC., Englewood, CO (US)
Filed by CIRCA SCIENTIFIC, INC., Englewood, CO (US)
Filed on Sep. 28, 2020, as Appl. No. 17/035,460.
Application 17/035,460 is a continuation of application No. 15/452,675, filed on Mar. 7, 2017, granted, now 10,786,651.
Prior Publication US 2021/0008345 A1, Jan. 14, 2021
Int. Cl. A61M 25/01 (2006.01); A61M 25/09 (2006.01); A61M 25/00 (2006.01)
CPC A61M 25/0147 (2013.01) [A61M 25/0097 (2013.01); A61M 25/0108 (2013.01); A61M 25/0113 (2013.01); A61M 25/0136 (2013.01); A61M 25/09041 (2013.01); A61M 2025/015 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A steerable guide catheter comprising:
a flexible guide tube having a deflectable distal end;
at least two tensioning lines coupled to the deflectable distal end of the flexible guide tube, wherein a first of the at least two tensioning lines is configured to deflect the distal end of the flexible guide tube in a first direction and a second of the at least two tensioning lines is configured to deflect the distal end of the flexible guide tube in a second direction; and
a housing coupled to the flexible guide tube,
wherein a proximal end of the flexible guide tube extends through the housing;
a compression fitting disposed about a proximal end of the housing and enclosing the proximal end of the flexible guide tube;
a first actuator and a second actuator each coupled to a drive shaft, the drive shaft extending through a first drive nut and through a second drive nut, the first drive nut being coupled to the first tensioning line and the second drive nut being coupled to the second tensioning line,
wherein no portion of the flexible guide tube extends through the first and second drive nuts, and
wherein both the first actuator and the second actuator are configured to move both the first and second drive nuts in opposite directions.