Device for performing or preparing for a mitral valve annuloplasty by a transfemoral approach
View Patent ↗The device ( 1 ) is intended to be positioned in a sealed introducer placed in a femoral vein in order to penetrate the left atrium ( 4 ) of the heart ( 3 ) by passing through the septal wall ( 5 ) thereof. The device comprises an assembly for cooperating with a handle under the control of control means for actuation of the assembly, for placing and fixing a reinforcement ring ( 7 ) on the mitral valve ( 2 ), said assembly being arranged at the end of a manipulation rod ( 6 ) and comprising: a bearing member ( 8 ) comprising a plurality of arms ( 8 a ) connected pivotably to the end of the rod ( 6 ) so as to change, under the action of the control means, from a position folded along the rod ( 6 ) to a deployed position spaced apart from the rod ( 6 ), in order to bear under the mitral valve ( 2 ) in a manner uniformly distributed along the periphery of the mitral valve; a counter-bearing member ( 12 ) comprising a plurality of arms ( 12 a ), at the free end of which arms ( 12 a ) the reinforcement ring ( 7 ) is arranged, the arms ( 12 a ) are connected pivotably to a support ( 13 ) disposed coaxially with respect to the rod ( 6 ) in such a way as to change, under the action of the control means, from a position folded along the rod ( 6 ) to a deployed position spaced apart from the rod ( 6 ), in order to realize the counter-bearing on the mitral valve and to position the reinforcement ring ( 7 ); means for removing sutures for fixing the reinforcement ring ( 7 ) to the mitral valve.
1. Device ( 1 ) for performing or preparing a transfemoral annuloplasty of the mitral valve of a heart ( 3 ), and intended to be positioned in a sealed introducer placed in a femoral vein to penetrate the left atrium ( 4 ) of the heart ( 3 ) through its septal wall ( 5 ), comprising an assembly for cooperating with a handle under the control of a control means for actuating the assembly for placing and attaching a reinforcement ring ( 7 ) on the mitral annulus ( 2 ), with said assembly arranged at the end of a handling rod ( 6 ) and comprising:
a bearing member ( 8 ) comprising a plurality of arms ( 8 a ) connected pivotably to the end of the rod ( 6 ) so as to change, under the action of the control means, from a position folded along the rod ( 6 ) to a deployed position spaced away from the rod ( 6 ) in order to provide support under the mitral annulus ( 2 ) in a manner uniformly distributed along the periphery of the mitral valve;
a counter-bearing member ( 12 ) comprising a plurality of arms ( 12 a ), at the free end of which arms the reinforcement ring ( 7 ) is arranged, with the arms ( 12 a ) connected pivotably to a support ( 13 ) disposed coaxially with respect to the rod ( 6 ) in such a way as to change, under the action of the control means, from a position folded along the rod ( 6 ) to a deployed position spaced away from the rod ( 6 ) in order to realize the counter-support on the mitral annulus and position the reinforcement ring ( 7 );
means ( 14 ) for removing sutures ( 11 ) to attach the reinforcement ring ( 7 ) to the mitral annulus.
2. A device ( 1 ) as in claim 1 , in which the arms ( 8 a ) of the bearing member ( 8 ) and/or the arms ( 12 a ) of the counter-bearing member ( 12 ) are connected pivotably to a support ( 13 ) disposed coaxially with respect to the rod ( 6 ) in such a way as to change, under the action of the control means, simultaneously or selectively and independently from each other, from the folded position to the deployed position.
3. A device ( 1 ) as in claim 1 , in which the arms ( 8 a ) of the bearing member ( 8 ) and/or the arms ( 12 a ) of the counter-bearing member ( 12 ) are arranged inside a sheath in the folded position, and are pushed out of the sheath and are self-expanding in the deployed position.
4. A device ( 1 ) as in claim 1 , in which the arms ( 8 a ) of the bearing member ( 8 ) and/or the arms ( 12 a ) of the counter-bearing member ( 12 ) each include a radiopaque and/or ultrasound marker.
5. A device ( 1 ) as in claim 1 , in which the arms ( 8 a ) of the bearing member ( 8 ) and/or the arms ( 12 a ) of the counter-bearing member ( 12 ) are telescopic.
6. A device ( 1 ) as in claim 1 , in which the means ( 14 ) to allow the extraction of sutures ( 11 ) comprise a plurality of arms ( 14 a ) connected pivotably to a support ( 15 ) disposed coaxially to the rod ( 6 ) so as to change, under the action of the control means, from a folded position along the rod ( 6 ) to a deployed position spaced away from the rod ( 6 ) that aligns with the arms ( 12 a ) of the counter-bearing member ( 12 ), each arm ( 14 a ) internally comprising an extractable suture ( 11 ) to anchor on the periphery of the mitral valve and to fix the reinforcement ring thereto ( 7 ).
7. A device ( 1 ) as in claim 1 , in which each arm ( 8 a ) of the bearing member ( 8 ) is curved, articulated, or flexible to facilitate its passage through the tendinous cords of the mitral valve.
8. A device ( 1 ) as in claim 1 , in which the end of each arm ( 8 a ) may be composed of several branches, which can move away from each other after passing through the mitral valve cords to form several support points under the mitral annulus.
9. A device ( 1 ) as in claim 1 , in which each arm ( 8 a ) of the bearing member ( 8 ) internally comprises an extractable suture ( 11 ) to go through the mitral annulus ( 2 ) and attach the reinforcement ring ( 7 ).
10. A device ( 1 ) as in claim 6 , in which the free end of each arm ( 8 a ) of the bearing member ( 8 ) comprises a piece of felt or Teflon fabric ( 10 ) intended to be laid under the mitral valve ( 2 ) and fixed by the sutures ( 11 ) to support and counter-bear against the reinforcement ring ( 7 ).