MEDICAL ENDOSCOPE VALVE

Abstract

A sterilizable medical endoscope valve comprises a central rod with an at least partially hollowed central channel opening onto one of the front surfaces and a head defining a seat for connecting to a fluid duct. The head and channel are joined by an elastic means. The assembly consists of a single part of unitary construction made of flexible, elastic polymer material.

Claims

1. A plunger for ensuring a closing or an opening function of lumens provided in a body of a handle of a medical endoscope, formed by comprising: a rod having a central channel opening onto a proximal front surface on the one hand, and into a transverse channel on the other hand; and an integrally molded button comprising two coaxial annular skirts, the two coaxial annular skirts including an annular outer skirt comprising an annular base designed for engagement on the body of the handle, the two coaxial annular skirts connected by at least one elastically deformable connection so as to allow a relative axial movement between the two coaxial annular skirts, the two coaxial annular skirts further including an annular inner skirt embedded on a proximal portion of the rod.

2. The plunger of claim 1, wherein the rod comprises joints which that are overmolded on annular grooves.

3. The plunger of claim 2, wherein the joints are lens-shaped and are made of an overmolding material that is less hard than the than a material of the rod.

4. The plunger of claim 1, wherein the at least one elastically deformable connection between the two coaxial annular skirts comprises two diametrically opposing connections.

5. The plunger of claim 1, wherein the elastically deformable connection comprises a curved tab, one transverse edge of the curved tab being rigidly connected to the outer skirt, and the another transverse edge of the curved tab being rigidly connected to the inner skirt.

6. The plunger of claim 5, wherein the outer skirt comprises a peripheral lumen for allowing lateral travel of the curved tab during relative axial movement of the two coaxial annular skirts.

7. The plunger of claim 6, wherein the inner skirt also comprises a peripheral window, and wherein the curved tab connects a transverse edge of the peripheral lumen of the outer skirt to a transverse edge of a lumen of the inner skirt.

8. The plunger of claim 1, wherein the plunger is configured to cooperate with a suction valve body of the handle of the medical endoscope.

9. The plunger of claim 1, wherein the plunger is configured to cooperate with an air/water valve body of the handle of the medical endoscope.

10. A single-use assembly comprising a suction plunger and an air/water plunger for an endoscope, wherein each of the suction plunger and the air/water plunger comprises: a rod having a central channel opening onto a proximal front surface on the one hand, and into a transverse channel on the other hand; and an integrally molded button, formed by two coaxial annular skirts, the two coaxial annular skirts including an annular outer skirt comprising an annular base configured for engagement on a body of a handle of the endoscope, the two coaxial annular skirts being connected by at least one elastically deformable connection so as to allow a relative axial movement between the two coaxial annular skirts, the two coaxial annular skirts further including an annular inner skirt embedded on a proximal portion of the rod.

11. A method for producing a single-use plunger for an endoscope according to claim 1, comprising: injecting, into a first molding cavity, a first elastomer plastic material in a mold for molding a rod having a central channel opening onto the proximal front surface on the one hand, and into a transverse channel on the other hand, and injecting a second elastomer plastic material into a mold for overmolding joints; injecting, into a second molding cavity, an elastomer plastics material for forming the annular inner skirt of the integrally molded button; and embedding the integrally molded button on the proximal portion of the rod.

12. The method of claim 11, wherein molding of the rod and molding of the integrally molded button are carried out during the same injection cycle, and wherein the integrally molded button is embedded on the proximal portion of the rod before cooling of the molded parts.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Embodiments of the present disclosure are described below, by way of non-limiting example, with reference to the accompanying drawings, in which:

[0032] FIG. 1 is a partial, exploded, perspective view of an endoscope handle, comprising the plunger coupling to which the present disclosure relates;

[0033] FIG. 2 is a perspective view of a suction plunger according to the present disclosure;

[0034] FIG. 3 is an exploded view of a suction plunger according to the present disclosure;

[0035] FIG. 4 is a cross-sectional view of a suction plunger according to the present disclosure;

[0036] FIG. 5 is a perspective view of the button of a suction piston according to the present disclosure; and

[0037] FIG. 6 is a cross-sectional view of the button of a suction plunger according to the present disclosure.

DETAILED DESCRIPTION

[0038] FIG. 1 shows an example of a known endoscope. It comprises a handle (1), from which a flexible tube (2) extends, which is terminated by a distal or operating end (3) that is introduced into the cavity to be investigated, and the orientation of which can be controlled by a deflectable sleeve (4). The sleeve is controlled by wires that are pulled in a controlled manner following the manual actuation of plunger wheels or buttons (5, 6, 7) provided on the handle (1) of the endoscope. The control portion of the mobile levers allows the doctor to control all the functions of the endoscope. The deflection (orientation in space) levers or buttons (5, 6, 7) direct the deflection cables and control the deflectable portion at the distal end of the insertion tube, thus allowing for a two-dimensional orientation. Blocking mechanisms (brakes) make it possible to fix the deflectable portion in the desired position.

[0039] The light is transmitted by an optical fiber (8), the proximal end (9) of which is coupled to an optical connector. The connection unit (11) further comprises an air intake (10).

[0040] A pneumatic connection (12) is intended to be connected to a vacuum pump or a reversible air pump for controlling the insufflation or suction at the distal end (3). The technical unit (11) also comprises an electrical connector (13) and a connection support (14) of a safety line and a water supply (15).

[0041] The handle (1) is connected to the tube (2) by a sheath (16) extended by a sleeve (17). The handle comprises an opening of the operator channel (18) that is equipped with a disposable biopsy plunger valve (19).

[0042] The handle comprises an air/water plunger (20) that controls the washing channel, and a suction plunger (30) for controlling the suction or insufflation by way of two tubes extending between the handle (1) and the distal end (3), one for transporting air and water to the distal end, the other for performing a biopsy or suction. The suction application is controlled by way of a suction plunger (30) provided on the handle. The plunger is connected to an adjacent channel by welded connections. The plungers (20, 30) are coupled to the body of the handle by way of annular bases (32).

[0043] The suction plunger (30) connects the suction channel to the operator channel, in the insertion tube. By pressing the button (31) of the plunger, it is possible to perform suction of the operator channel. The air/water plunger (20) is comparable to the plunger and the suction plunger (30), except that a plunger comprising a button having two paths is used in a dual-channel device, which makes it possible to convey the air or the water as far as the lens at the distal end, for washing or insufflation of air, in order to improve the vision. The two plungers (20, 30) can be detached for replacement, when they are single-use, or otherwise for cleaning.

Detailed Description of the Plungers (20, 30)

[0044] FIGS. 2 to 4 are different views of a suction plunger according to the present disclosure. According to one aspect of the disclosure, the rod (40) of the plunger for an endoscope is made of molded synthetic plastic material and comprises a rectangular channel (42) that opens into a transverse channel (33). The part is cylindrical in shape, having a plurality of annular grooves (50 to 53) into which a second plastic material is then injected in order to form joints (80 to 83) by overmolding. The assembly thus forms an overmolded monolithic part, having the functions necessary for the tight closure and the opening of a channel provided in the endoscope. The rod (40) of the plunger is conventionally molded from polypropylene.

[0045] The button (31) constitutes a second monolithic part, also formed by molding. As can be seen in FIGS. 5 and 6, it comprises an annular outer skirt (60) and an annular inner skirt (61), which skirts are coaxial.

[0046] The two skirts (60, 61) are connected by two elastically deformable tabs (63) in order to allow a relative movement, according to an axial direction, of the two skirts (60, 61).

[0047] The elastically deformable tabs (63) are curved and are U-shaped, a first transverse edge (65) being connected to the annular outer skirt (60) and the second transverse edge (64) being connected to the annular inner skirt (61). The skirts comprise windows allowing for the travel of the tabs when a force is exerted on the button (31). The elastically deformable tabs (63, 66) form springs that ensure the resilient guiding of the button (31).

Production Method

[0048] The production of the plunger can be achieved by molding in a loose-detail mold, for molding of the rod (40), then the formation of joints (80 to 83) by overmolding with a second injection of a material less hard than that used for the injection of the core of the rod.

[0049] The button is formed during the same injection cycle, in a different mold. It is then moved by a robotic arm in order to be engaged on the rod (40) and embedded on the proximal portion, before cooling of the parts.

[0050] The plungers according to the disclosure can be combined in a sterile bag, in order to form a kit of single-use plungers.