US 12,256,977 B2
High frequency vascular closure device
Tomoji Maruyama, Bear, DE (US)
Assigned to Terumo Medical Corporation, Somerset, NJ (US)
Filed by TERUMO MEDICAL CORPORATION, Somerset, NJ (US)
Filed on Oct. 8, 2019, as Appl. No. 16/595,820.
Prior Publication US 2021/0100604 A1, Apr. 8, 2021
Int. Cl. A61B 18/14 (2006.01); A61B 17/00 (2006.01); A61B 17/28 (2006.01); A61B 18/00 (2006.01); A61B 18/12 (2006.01)
CPC A61B 18/1445 (2013.01) [A61B 17/0057 (2013.01); A61B 17/2833 (2013.01); A61B 2017/00654 (2013.01); A61B 2017/00778 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00404 (2013.01); A61B 2018/126 (2013.01); A61B 2018/1475 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for closing a puncture in a blood vessel, comprising:
a housing with a distal shaft and a proximal casing oriented along a longitudinal axis, wherein the housing defines a longitudinal passage to receive a guidewire, wherein the device is configured to be positioned along the guidewire to approach the puncture;
an inner housing in an internal chamber of the proximal casing, wherein the inner housing is slidable along the longitudinal axis between a distal position and a proximal position, and wherein the inner housing is biased into the distal position;
a forceps mounted at a distal end of the distal shaft comprising first and second jaws, wherein the first and second jaws are electrically conductive and are electrically insulated from each other, wherein the first and second jaws are configured to be pivoted between an open position and a closed position for grasping the blood vessel around the puncture to be closed, each of the first and second jaws extending across and bisecting the longitudinal axis when in the open position;
first and second electrical conductors having distal ends connected to the first and second jaws, respectively, and having proximal ends configured to receive a bipolar electrical current;
a positioning wire retained by the distal shaft and selectably extendable from a retracted position contained in the distal shaft to an extended position with a distal end protruding from the distal shaft beyond the forceps, wherein the protruding distal end is comprised of a shape memory material that reconfigures from a substantially straight shape when stored in the retracted position into a lateral profile extending transverse to the longitudinal axis when in the extended position;
a positioning lever mounted inside the inner housing and coupled to the positioning wire, wherein the positioning lever is configured to be moved between a first position that places the positioning wire in the retracted position and a second position that places the positioning wire in the extended position, and wherein the positioning lever is biased to the first position; and
a forceps lever mounted to the inner housing and coupled to the first and second jaws, wherein the forceps lever is configured to be moved between a first position that places the first and second jaws in the closed position and a second position that places the first and second jaws in the open position, and wherein the forceps lever is biased to the first position;
wherein the inner housing is configured to be moved from the distal position to the proximal position to cause the positioning wire to retract into the distal shaft and the first and second jaws to pivot to the closed position grasping the blood vessel across the puncture so that the puncture can be closed by activating the bipolar electrical current.