Electrosurgical device for resector

Abstract

The invention relates to an electrosurgical device (40) suitable for being assembled in a resector (10) comprising a handle (15) provided with a supporting member (16). The electrosurgical device includes a main tube (41), a distal operational part (42) that protrudes out of the main tube (41), and a proximal bent part (45) which is suitable for being assembled in the handle (15). The main tube (41) supports a seal (50) which is intended to cooperate with the supporting member (16), the seal (50) comprising a hollow sleeve including an upper wall (51) and a lower wall (51') that define a height therebetween, the hollow sleeve comprising a first opening (52) and a second opening (52') opposite the first opening (52). The main tube (41) passes through the first and second openings (52, 52'), the lower wall (51') forming an angle β relative to the upper wall (51) such that the height of the first opening (52) is smaller than the height of the second opening (52').

Description

[0001] Electrosurgical device for resectoscope

[0002] The present invention relates to an electrosurgical device for a resector, which allows on the one hand to lift tissues by means of a mechanical action and on the other hand to cut and / or coagulate tissues by an electrical action.

[0003] These devices are used in particular for the endoscopic resection of living tissue, such as a prostate, a bladder or a tumor.

[0004] Such an electrosurgical device is connected to a power source and includes an electrode for producing plasma, used to cut tissue and / or coagulate bleeding that may occur during tissue detachment.

[0005] There are several different types of resectors on the market, which requires manufacturers of electrosurgical devices to produce several types of these devices to fit different resector handles.

[0006] To date, there is no universal electrosurgical device that can be adapted to the different resectors on the market.

[0007] The present invention aims to provide an electrosurgical device for a resector which does not reproduce the aforementioned drawbacks.

[0008] The present invention aims in particular to provide a universal electrosurgical device which fits into different resectors on the market.

[0009] The present invention also aims to provide an electrosurgical device which is simple and / or inexpensive to manufacture and assemble.

[0010] The present invention thus relates to an electrosurgical device adapted to be assembled in a resector comprising a handle provided with a support member, said electrosurgical device comprising a main tube, an operational distal part, projecting from said main tube, and a bent proximal part which is adapted to be assembled in said handle, said main tube supporting a joint intended to cooperate with said support member, said joint comprising a hollow sleeve, comprising an upper wall and a lower wall defining a height between them, said hollow sleeve comprising a first opening and a second opening opposite said first opening, said main tube passing through said first and second openings, said lower wall forming an angle p with respect to said upper wall, so that the height of said first opening is less than that of said second opening.

[0011] Advantageously, said angle p is between 1° and 10°, advantageously between 3° and 7°, preferably approximately 5°.

[0012] Advantageously, said first opening comprises an upper internal bead and a lower internal bead which ensures clamping of said seal on said main tube in all positions of said seal.

[0013] Advantageously, said upper and lower internal beads are part of a peripheral bead which surrounds said first opening.

[0014] Advantageously, the length of said seal between said first and second openings is between 6 and 10 mm, preferably approximately 8 mm.

[0015] Advantageously, said height of said first opening is between 1.40 and 1.60 mm, preferably approximately 1.50 mm.

[0016] Advantageously, said height at said second opening is between 2.60 and 2.80 mm, preferably approximately 2.70 mm.

[0017] Advantageously, the horizontal dimension or width of said first opening is less than that of said second opening.

[0018] Advantageously, said width of said first opening is between 2.60 and 2.80 mm, preferably approximately 2.70 mm, and said width of said second opening is between 3.10 and 3.30 mm, preferably approximately 3.20 mm.

[0019] Advantageously, said first opening comprises an upper external bead.

[0020] Advantageously, said upper wall comprises at least one upper profile and / or said lower wall comprises at least one lower profile.

[0021] Advantageously, said seal is produced by molding a suitable material, such as for example silicone. Advantageously, said bent distal portion forms an angle α relative to said main tube of between 20° and 25°, preferably approximately 24°.

[0022] Advantageously, the length of said bent distal portion is between 13 and 15 mm, preferably approximately 14 mm.

[0023] Advantageously, said operational distal part comprises a wire, in particular made of tungsten, which forms approximately a U.

[0024] These and other advantages and characteristics of the present invention will appear more clearly during the following detailed description, made with reference to the accompanying drawings, given by way of non-limiting examples, and in which:

[0025] Figure 1 is a schematic perspective view of a resector according to an advantageous embodiment,

[0026] Figure 2 is a schematic perspective view of an electrosurgical device according to an advantageous embodiment, which fits into a resector,

[0027] Figure 3 is a side view of the electrosurgical device of Figure 2,

[0028] Figure 4 is a schematic side detail view showing the placement of an electrosurgical device in the handle of a resector,

[0029] Figures 5 and 6 are schematic perspective detail views showing the adaptation of the electrosurgical device seal in two different handles,

[0030] Figure 7 is a schematic perspective detail view of a seal of the electrosurgical device according to an advantageous embodiment, arranged on said electrosurgical device,

[0031] Figure 8 is a cross-sectional detail view of the joint of Figure 7, and

[0032] Figure 9 is a detailed perspective view of the joint of Figures 7 and 8.

[0033] Referring to Figure 1, there is shown a resector 10 which is intended to be connected to a high frequency power supply device (not shown). A control pedal (not shown) can be connected to the high frequency power supply device.

[0034] The resector 10 comprises a handle 15 and a hollow outer sleeve 11 forming an endoscope through which an electrosurgical device 40, visible in Figures 2 and 3, can be inserted into the patient's body.

[0035] The electrosurgical device 40 comprises a main tube 41, an operational distal portion 42, projecting from the main tube 41, and a proximal portion 45 intended to be fixed in a resectoscope handle 15.

[0036] The distal portion 42 comprises a wire 43 which forms approximately a U. Other shapes are also possible.

[0037] The wire 43 is advantageously made of a sufficiently rigid electrically conductive material, such as tungsten or stainless steel. Tungsten has the particular advantage of not deforming or deforming only slightly when heated. In addition, it is more rigid than the materials generally used in this type of electrosurgical device, such as iridium and platinum alloys.

[0038] The proximal part 45 is bent relative to the main tube and ends with a rotation axis 46 which is inserted into a handle 15, as seen in particular in Figure 4.

[0039] According to the invention, a seal 50 is arranged on the main tube 41 of the electrosurgical device 40. This seal 50 is intended to come between the sleeve 11 and a support member 16 of the handle 15. More precisely, the seal 50 is inserted into a recess of the support member 16, and cooperates with an internal cone of the sleeve 11, which fits around the electrosurgical device 40 after its assembly on the handle 15 of the resector 10.

[0040] Due to its asymmetrical shape which will be described in more detail below, this joint 50 makes it possible to adapt the electrosurgical device 40 in different handles 15 and sheaths 11 of resectors.

[0041] The seal 50 makes it possible to eliminate an intermediate ring between the sleeve 11 and the handle 15, which improves ergonomics for the user. In addition, the seal 50 adapts to the internal cone of the sleeves 11 of the existing resectors 10, without exerting excessive tightening so as not to disturb the sliding when the handle 15 is actuated.

[0042] The seal 50, more particularly shown in Figures 6 to 8, comprises a hollow sleeve, provided with an upper wall 51 and a lower wall 51' (in the orientation of Figure 8).

[0043] This hollow sleeve has a first opening 52 and a second opening 52' opposite the first opening 52. The main tube 41 passes through this hollow sleeve by passing through the first and second openings 52, 52'.

[0044] The lower wall 51' forms an angle P relative to the upper wall 51. As a result, the vertical dimension or height (in the orientation of FIG. 8), namely the distance between the upper 51 and lower 51' walls, of the first opening 52 is less than that of the second opening 52'. The seal 50 is thus asymmetrical, which allows it to tilt relative to the main tube 41.

[0045] Thus, Figures 5 and 6 illustrate the assembly of the same electrosurgical device 40 in two different handles 15. In these figures, the sleeves 11 have been omitted to show the behavior of the seal 50. It can be seen that in Figure 5, the seal 50 is higher in the support member 16 than in Figure 6, where it is lower. The first opening 52 ensures sealing and the second opening 52' allows the seal to be adapted to the different dimensions of the two handles 15.

[0046] In an advantageous embodiment, the angle p is between 1° and 10°, advantageously between 3° and 7°, preferably approximately 5°.

[0047] Advantageously, the first opening 52 comprises an upper internal bead 53 and a lower internal bead 54 which ensures that the seal is clamped on the main tube 41 in all positions. Advantageously, the upper 53 and lower 54 internal beads are part of a peripheral bead which surrounds the first opening 52.

[0048] In an advantageous embodiment, the seal 50 may have the following dimensions: - the length of the seal 50 between its first and second openings 52, 52' is between 6 and 10 mm, preferably approximately 8 mm;

[0049] - the height of the first opening 52, therefore the distance between the upper 53 and lower 54 bead, is between 1.40 and 1.60 mm, preferably approximately 1.50 mm;

[0050] - the height at the second opening 52' is between 2.60 and 2.80 mm, preferably approximately 2.70 mm.

[0051] Advantageously, the horizontal dimension or width (in the orientation of Figure 8) of the first opening 52 is less than that of the second opening 52'. In the advantageous example above, this width of the first opening 52 is between 2.60 and 2.80 mm, preferably approximately 2.70 mm, while the width of the second opening 52' is between 3.10 and 3.30 mm, preferably approximately 3.20 mm.

[0052] In a preferred embodiment, the seal 50 has the following dimensions:

[0053] - angle P is 5°;

[0054] - the length of the seal 50 between its first and second openings 52, 52' is 8 mm;

[0055] - the height of the first opening 52 is 1.53 mm;

[0056] - the height of the second opening 52' is 2.72 mm;

[0057] - the width of the first opening 52 is 2.70 mm;

[0058] - the width of the second opening 52' is 3.20 mm.

[0059] Advantageously, the first opening 52 also includes an upper external bead 55, to ensure perfect sealing regardless of the angular position of the seal relative to the main tube when assembled on a resector handle 15.

[0060] Advantageously, the upper wall 51 comprises one or more upper profiles 56 and the lower wall 51' comprises one or more lower profiles 57, which further promote the sealing of the seal 50 when it is arranged in a resector handle 15. In the example of FIG. 8, there are two upper profiles 56 and three lower profiles 57. Advantageously, the seal 50 is produced by molding a suitable material, such as for example silicone. Other equivalent materials are conceivable.

[0061] Thus, despite the variable dimensions of the support members 16 of the different handles 15 and of the different resector sleeves existing on the market, the asymmetrical seal 50 makes it possible to adapt the electrosurgical device 40 and to ensure perfect sealing. It is therefore no longer necessary to manufacture different electrosurgical devices 40, the use of the seal 50 of the present invention making it possible to adapt the same electrosurgical device 40 in different handles 15.

[0062] According to another advantageous aspect, the bent portion 45 forming the proximal portion of the main tube 41 has specific dimensions which also promote the adaptation of the same electrosurgical device 40 in different handles 15.

[0063] Thus, advantageously, this bent portion 45 forms an angle α with respect to the main tube 41 of between 20° and 25°, preferably approximately 24°. In existing devices, this angle is generally approximately 10°. At the same time, the length of this bent portion 45 is reduced, being advantageously between 13 and 15 mm, preferably approximately 14 mm. In existing devices, this length is generally approximately 25 mm.

[0064] With its reduced length and greater angle, this 45° angled part allows for easier adaptation to the various resectors on the market, in particular to the various 15° handles.

[0065] Although the present invention has been described with reference to an advantageous embodiment thereof, it is understood that a person skilled in the art may make any useful modifications thereto, without departing from the scope of the present invention as defined by the appended claims.

Claims

Claims 1 Electrosurgical device (40) adapted to be assembled in a resector (10) comprising a handle (15) provided with a support member (16), said electrosurgical device comprising a main tube (41), an operational distal portion (42), projecting from said main tube (41), and an angled proximal portion (45) which is adapted to be assembled in said handle (15), said main tube (41) supporting a joint (50) intended to cooperate with said support member (16), said joint (50) comprising a hollow sleeve, comprising an upper wall (51) and a lower wall (51') defining a height therebetween, said hollow sleeve comprising a first opening (52) and a second opening (52') opposite said first opening (52), said main tube (41) passing through said first and second openings (52, 52'), characterized in that said lower wall (51') forms an angle P relative to said upper wall (51),such that the height of said first opening (52) is less than that of said second opening (52')., 2.- Device according to claim 1, in which said angle P is between 1° and 10°, advantageously between 3° and 7°, preferably approximately 5°. 3.- Device according to claim 1 or 2, in which said first opening (52) comprises an upper internal bead (53) and a lower internal bead (54) which ensures clamping of said seal (50) on said main tube (41) in all positions of said seal (50). 4.- Device according to claim 3, in which said upper and lower internal beads (53, 54) are part of a peripheral bead which surrounds said first opening (52). 5.- Device according to any one of the preceding claims, in which the length of said seal (50) between said first and second openings (52, 52') is between 6 and 10 mm, preferably approximately 8 mm. 6.- Device according to any one of the preceding claims, in which said height of said first opening (52) is between 1.40 and 1.60 mm, preferably approximately 1.50 mm. 7.- Device according to any one of the preceding claims, wherein said height at said second opening (52') is between 2.60 and 2.80 mm, preferably approximately 2.70 mm. 8.- Device according to any one of the preceding claims, in which the horizontal dimension or width of said first opening (52) is less than that of said second opening (52'). 9.- Device according to claim 8, wherein said width of said first opening (52) is between 2.60 and 2.80 mm, preferably approximately 2.70 mm, and said width of said second opening (52') is between 3.10 and 3.30 mm, preferably approximately 3.20 mm. 10.- Device according to any one of the preceding claims, in which said first opening (52) comprises an upper external bead (55). 11.- Device according to any one of the preceding claims, in which said upper wall (51) comprises at least an upper profile (56) and / or said lower wall (51') comprises at least one lower profile (57). 12.- Device according to any one of the preceding claims, in which said seal (50) is produced by molding a suitable material, such as for example silicone. 13.- Device according to any one of the preceding claims, in which said bent distal part (45) forms an angle α with respect to said main tube (41) of between 20° and 25°, preferably approximately 24°. 14.- Device according to any one of the preceding claims, in which the length of said bent distal part (45) is between 13 and 15 mm, preferably approximately 14 mm. 15.- Device according to any one of the preceding claims, in which said operational distal part (42) comprises a wire (43), in particular made of tungsten, which forms approximately a U.

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