Microcommissurotomy device with levers
AssigneeMedicorp, S.A.
InventorsGeorges Amor, Brice Letac, Alain Cribier, Thierry Rimlinger
Life of this patent
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Abstract
A retractor is mounted at the distal end of a catheter. The retractor is constituted of two symmetrically deformable parallelograms. In the closed position, the retractor has substantially the same radial extension as the catheter.
Claims14
A microcommissurotomy device with levers (4) comprising:
- a proximal end socket (5) affixed rigidly to the distal end of a catheter (1),
- a member (11) axially traversing the proximal end socket and terminating at the distal end (6) of a retractor, and
- two articulated parallelograms (7) arranged symmetrically in relation to the member (11) of the retractor, each parallelogram being constituted of one active arm (20) parallel to the axis of the retractor and two parallel levers (21, 22) articulated at one end (17, 18) on said arm, the opening of the retractor being secured by manual control by movement of the distal end (6) of the retractor in relation to its proximal end socket (5) to displace the active arms (20) parallel to the axis of the retractor, the retractor in closed position having a radial bulk or extension essentially equal to that of the catheter (1),
- wherein the levers (21, 22) are articulated at their opposite end (15, 16) on the proximal end socket (5) and in that each parallelogram (7) is connected to the distal end (6) of the retractor by a small articulated rod (8, 9).
The microcommissurotomy device as in one of the preceding claims, wherein the proximal lever (21) of each parallelogram (7) carries a plate spring (27) which, when the retractor (4) is in closed position, pulls said proximal lever (21) toward the exterior.
The microcommissurotomy device as in one of the preceding claims, wherein the distal end (6) of the retractor (4) is in the form of an ogival head carried by a tube (11) sliding in the proximal end socket (5) of the retractor.
The microcommissurotomy device as in one of the preceding claims, characterized in that the member (11) of the retractor is connected to at least one traction wire (12) and slides in a flexible member (13) within the catheter (1), the forces of traction and compression being transmitted from the proximal end to the distal end of the catheter by virtue of the combination of the traction wire (12) and the flexible member (13) within the catheter (1).
The microcommissurotomy device as in one of the preceding claims, characterized in when the retractor (4) is in open position, its distal end (6) is located between the active arms (20) of the retractor (4).
The device as in one of the preceding claims, characterized in the active arm (20) and the proximal lever (21) of each parallelogram (7) present a semi-cylindrical mounting (25, 26) on the exterior, so that the retractor (4) is contained entirely within the cylindrical exterior surface formed by the symmetrical mountings of the two parallelograms (7) in closed position.
A catheter (1) intended to be mounted between the distal retractor (4) and the proximal manual control of the microcommissurotomy device as in one of the preceding claims, wherein the catheter comprises:
- a flexible external member (2) and a pliable exterior sheathing (3) covering the flexible external member,
- at least one internal traction wire (12) intended to be connected by the one end to said proximal manual control and by the other end to the sliding distal end (6) of the retractor (4),
- a flexible member (13), within the catheter (1), in which flexible member (13) slides the traction wire (12), the forces of traction and compression being transmitted from the proximal end to the distal end of the catheter by virtue of the combination of the traction wire (12) and the internal flexible member (13).
Dependencies are inferred from the claim text.