FR2657248A1 - ARTIFICIAL CARDIAC VALVE. - Google Patents

Abstract

The present invention relates to a particularly reliable artificial heart valve, comprising an annular body provided with two oscillating flaps. The annular body (1) is formed by an inner ring (10) associated with two outer half rings (11) to form articulation housings for two oscillating valves (2) in the shape of a half cone, articulated on the circumference of said ring.

Description

ARTIFICIAL CARDIAC VALVE

  The present invention relates to an artificial heart valve

  having improved functional characteristics.

  Various types of heart valves are already known, the most common of which include two opposed oscillating valves forming a unidirectional valve, the opening of which is automatically caused by the flow of blood in one direction, and the closing by

a flow in the opposite direction.

  These valves of known type do not offer the best guarantees of safety, which can have particularly harmful consequences

for the patient.

  Moreover, these valves have a particularly

  complex, which does not always allow satisfactory operation.

  The present invention proposes to eliminate the drawbacks mentioned above by producing an artificial heart valve designed to ensure optimum fixation of the valves on their support, and thus guarantee

precise operation.

  For this purpose, the present invention proposes to provide a heart valve having a very limited number of components, which can be

  associated in a way that is both easy and safe.

  Another object of the present invention is to provide a reliable and feasible heart valve using elements and materials easily.

commercially available.

  The heart valve according to the present invention comprises an annular body provided with two oscillating valves, said body being formed of an inner ring associated with two half outer rings to form housings intended to receive the two oscillating valves, which have

  the form of half-cone articulated on the edge of said inner ring.

  2 - Other characteristics and advantages of the present invention

  from the description given below of a form of

  preferred embodiment but not limiting, and with reference to the accompanying drawings in which Figure 1 is an exploded schematic perspective view of the components of the heart valve according to the present invention, Figure 2 is a sectional view illustrating the articulation of a 3 is a view from above of the heart valve according to the invention, FIG. 4 is a view in partial section and in elevation of the heart valve according to the invention, in its open position. and FIG. 5 is a diagrammatic sectional view showing the valve

  heart according to the invention, in the closed position.

  With reference to the appended figures, the heart valve according to the present invention comprises an annular body 1 on which are articulated two

swing valves 2.

  The annular body 1 comprises an inner ring 10 associated with two

half inner rings 11.

  The inner ring 10 comprises an inner cylindrical member 20 whose end opposite to that intended to be connected to the valve comprises a flange 21 serving as a support for the end of the

  half rings Il which have a protruding edge on the outside 22.

  Said half rings are housed in a cavity 25 formed on the outer wall of the ring 10, the inner surface of which is

perfectly smooth.

  3 - An important characteristic of the valve according to the invention is that said inner ring has radial projections, which, when associated with the outer half-rings 11, form the

  valve hinge housing.

  Said projections 30 comprise notches 31 provided for receiving the widened end 35 of a rod 36 extending the end of the

  valves 2, which are advantageously in the form of a half-cone.

  Thus, there is provided a valve whose interior has no narrowed portion that could oppose blood flow or free oscillation

valves.

  In addition, in the method of attachment shown, the hinge housing of the valves comprises a stop element to limit the opening of said valves, which, in the closed position, are supperposent on the rim of the inner ring 10 so to achieve a particularly precise closure. The invention described above thus makes it possible to produce a heart valve

  Artificial operation particularly reliable and accurate.

  It will be able to receive many modifications and improvements

  without departing from the scope of the invention.

4 -

Claims (6)

claims   1 Artificial heart valve with an annular body r Iln; two oscillating valves, characterized in that said annular body (1) is formed of an inner ring (10) associated with two half outer rings (11) to form hinge seats for two oscillating valves (2), shaped half-cone, articulated on the edge of said ring.   2 heart valve according to claim 1, characterized in that the inner ring (10) has a substantially cylindrical and smooth inner surface, having a flange (21) at its opposite end to   that intended to receive the articulation of the valves.   Heart valve according to one of the preceding claims,   characterized in that the inner ring (10) has on its outer surface a cavity (25) forming a housing for the half rings (11).   Heart valve according to one of the preceding claims,   characterized in that the half rings (11) comprise, close to   their end directed towards the valves, a projecting edge (22).   Heart valve according to any one of the preceding claims,   characterized in that the hinge seats of the flaps (2) are formed by projecting portions (30) extending radially with respect to the inner ring (10), said projecting portions having notches (31) provided for receiving the enlarged part (35) of a rod (36)   extending the end of the valves (2).   Heart valve according to any one of the preceding claims,   characterized in that the valves (2), in their closed position, are bent at least partially on the flange of the ring inside (10). -   Cardiac valve according to any one of the preceding claims,   characterized in that the projecting edge (22) forms a stop member for   limit the opening of the flaps (2).