WO2018172692A1

WO2018172692A1 - Device for dilating the uterine cervical canal

Info

Publication number: WO2018172692A1
Application number: PCT/FR2018/050675
Authority: WO
Inventors: Aleksandra PETRICEVIC
Original assignee: Petricevic Aleksandra
Priority date: 2017-03-21
Filing date: 2018-03-20
Publication date: 2018-09-27
Also published as: EP3599985A1; FR3064171A1; FR3064171B1

Abstract

A device for dilating the uterine cervical canal comprises: - a support (3); - a dilator rod (6) mounted in translation in said support (3); - an extensible protective tube fixed to an end of the support (3); - a winged guide (7) housed in the extensible protective tube and fixed to the end of the support (3); and – a dilator bushing mounted on the dilator rod (6), the dilator rod (6) being adapted to move apart the wings of said winged guide (7) inside the extensible protective tube and to introduce a tubular portion of said dilator bushing inside the winged guide (7) housed in the extensible protective tube. Use to dilate the neck of the uterus and to facilitate examinations, diagnoses and surgical interventions inside the uterus.

Description

Uterine cervical canal dilatation device

The present invention relates to an uterine cervical canal dilatation device and an associated speculum for dilating the cervix, facilitating examinations, diagnostics and surgical procedures within the uterus.

TECHNICAL AREA

This disposable medical device belongs to the field of application of medicine and medical instruments.

This medical device is used for interventions in gynecology, specifically to expand the cervical canal, examine and pass instruments for all examinations and surgical procedures performed in the uterine cavity. It allows you to safely expand or dilate the cervical canal.

STATE OF THE ART

Hegar candles have been around since 1879 and have never been upgraded or replaced. They are in the form of metal or plastic spacers. After grasping the cervix with forceps and pulling it outward, the practitioner introduces Hegar's first candle by pushing hard to spread the cervical canal. It begins with a small diameter, then introduces the following candles usually numbered 2 to 12 mmm one after the other. The first candles are the most dangerous because, because of their small size, they often cause lacerations or perforations of the cervical canal, leading to risks of internal bleeding. This is why these high-risk acts are performed in the operating room and involve costly surgical procedures.

The major disadvantage of this type of dilatation is obviously the extreme force that must be applied to penetrate the instrument into the cervical canal, the most powerful muscle of the woman's body. The thrust exerted is then 7 to 10 kg. Hence the risk of perforation which represents 2% to 3% of surgical procedures in gynecology (source: French Ministry of Health).

The frontal resistance encountered and the friction exerted on the walls of the cervical canal damage the tissues and cause heavy bleeding, causing irreversible damage. Repeated aggression weakens the muscles surrounding the cervical canal, which can not keep the uterus closed until the end of a future pregnancy, forcing the gynecologist to place a ring around the cervical canal.

Due to frequent handling errors during sterilization cycles, the use of these metal instruments does not guarantee effective and 100% safe sterilization.

In recent years various technologies have emerged, offering expansion solutions by lateral spacing probes, exerted by pneumatic or hydraulic pressure to a pre-determined spacing without the possibility of choice of the diameter of expansion which varies according to the interventions ( between 6 and 12 mm). The reliability of these products has not been demonstrated.

TECHNICAL PROBLEMS

The invention of this medical device solves the manufacturing problems usually encountered in the design of medical devices for gynecological examinations and procedures. By its simplicity of operation and use, it also allows the dilation and protection of the cervical canal by avoiding all possibilities of damaging, lacerating or perforating the collagenous tissues and muscle fibers that surround the cervical canal in women.

According to a first aspect, the invention relates to a device for dilatation of the uterine cervical canal, comprising:

- a support ;

a dilator rod mounted in translation in the support;

an extensible protective tube attached to one end of the support; - A finned guide housed in the extensible protective tube and fixed to the end of the support; and

- A dilator bushing mounted on the dilator rod, the dilator rod being adapted to move the fins of the fin guide inside the expandable protective tube and to introduce a tubular portion of the dilator sleeve inside the finned guide housed in the extensible protective tube.

The dilator rod thus makes it possible to dilate the cervical canal during its translation inside the extensible protective tube, the latter making it possible to protect the uterine cervical canal from friction of the dilator shaft in translation.

The tubular portion of the dilator sleeve holds the fin guide and the expandable protective tube apart and forms a protective channel to prevent contact and damage to the cervical canal during the passage of diagnostic and surgical instruments.

According to an advantageous characteristic, the dilator rod comprises at one end a guide rod connected by a series of portions of different sizes to a tube of the dilator rod, the size of the portions decreasing from the tube to the guide rod, for example from 12 to 2 mm, the guide rod having a diameter substantially equal to 2 mm.

The dilatation of the uterine cervical canal is obtained gradually, between 2 and 12 mm.

In practice, the tube of the dilator rod comprises a slot in which slides a transverse guide rod, the support having hooks adapted to engage with the transverse guide rod on each side of said tube of the dilator rod.

The translation of the dilator rod is thus guided in the support. According to an implementation characteristic, the support comprises a narrowing portion forming an end stop in translation of the dilator rod in the support, the displacement in translation being for example substantially equal to 50 mm. In practice, the tubular portion of the dilator bushing is secured to a conical portion abutting in the narrowing portion of the support at the end of travel in translation of the dilator rod.

According to another characteristic, the conical portion of the dilator bushing comprises two windows in which are adapted to be introduced respectively two protrusions of the dilator rod during a withdrawal, by the dilator rod, the dilator sleeve out of the finned guide housed in the extensible protective tube.

In practice, the fin guide comprises several fins, and for example five fins, mounted on a conical portion of the fin guide, and movable between a rest position, in which the fins are collected and held tight inside the tube. extensible protector, and an expansion position, wherein the fins, after separation by the dilator rod, are held apart by the expansion sleeve inside the expandable protective tube.

According to an implementation characteristic, the fins have on an external part excrescences, and for example three excrescences per fin, cooperating in the expansion position with a widened cylindrical portion of the extensible protective tube.

The excrescences cooperating with a widened cylindrical portion of the expandable protective tube allow the practitioner, by changing the position of the dilator after positioning and dilation of the uterine cervical canal, to adjust the position of the uterus and thereby facilitate the endoscopic vision of the uterus. uterine cavity.

According to a second aspect, the invention relates to a vaginal speculum comprising an extended body of a handle, forming a housing for supporting a uterine cervical canal dilation device as described above.

In practice, the body of the vaginal speculum comprises an upper spoon and a lower spoon mounted on a conical ring, the ends of the lower and upper spoons respectively clipping in two grooves engraved on the support of the dilator device of the uterine cervical canal.

The vaginal speculum has similar features and advantages to those described above with reference to the cervical cervical canal dilatation device.

In principle, the invention relates to a disposable medical device which is integrated with a speculum of new design and in which is fixed the extensible protective tube support, allowing expansion from 2 to 12 mm safely. This extensible protective tube covers the cervical canal to prevent any traumatic contact on the walls during the passage of hysteroscopic instruments and surgery, also avoiding any contribution of vaginal bacteria in the uterus.

This medical disposable device is composed of the various elements presented above to ensure the aforementioned advantages.

It will be delivered in a plastic and sterile packaging. After use it will be placed in medical waste containers.

By solving the problems already known and the lack of solutions made available to date, such as harmful or allergenic materials in contact with the human body, its application also allows the gynecologist to practice the act without stress or risk, and especially without stress and pain for the patient. Its ease and its safety of use make it possible to practice some interventions directly in the gynecological cabinets without systematically having recourse to a general anesthesia in operating theater with its side effects. It is therefore necessary to take into account the reduction of the costs of the operations compared to those of an operating theater and the anesthesia practiced.

It is well known that about one out of two gynecologists never practice cervical dilatation with regard to the risks involved. From now on it is the totality of the practitioners who will be able to accede to this act without having systematically recourse to the operating room and its collateral effects, as well in terms of costs as of security for the practitioner and the patient. In addition, the safety and ease of implementation of the device allow a significant time saving compared to all other forms of expansion.

The selling price of this device will be positioned so that it does not exceed half the cost price of a sterilization of the instruments it replaces: metal speculum, set of Hegar candles, stainless steel clip.

The other advantages of this invention are as follows: 1) The whole of this device is delivered sterile in plastic packaging for single use.

2) The dilatation is done inside an extensible protective tube protecting the cervical canal from friction causing wounds and bleeding during the dilatation.

3) Safe and painless dilatation can be done with local anesthesia.

4) Once the dilation has been completed, there remains a protective tunnel protecting the canal from traumatic instruments and eliminating the risk of importing vaginal bacteria.

5) Because of the risk of injury and pain, certain procedures can be performed directly in gynecology practices.

6) The price of this device will not exceed half the price of the sterilization of the instruments it replaces.

7) This device, by its invention and its easy use, allows all gynecologists to practice cervical dilatation.

Thanks to the elements that compose it, the speculum to dilate the cervical canal completely solves the problem of cervical dilation by avoiding any contact and damage or injury of the tissues of the wall of the cervical canal. It also prevents the perforation of the uterine walls.

While facilitating interventions within the uterine cavity, this device is designed for single use.

One of the added values of this medical device is that it is designed to be integrated with a vaginal speculum. Thanks to the extendable protective tube deposited on the walls of the canal, it creates a protective tunnel between the entrance of the vagina and the uterine cavity thus preventing any contribution of vaginal bacteria brought by the instruments used.

These protective elements of the wall of the cervical canal are fixed together on the end of the support of the dilation device integrated in the vaginal speculum.

The dilation is effected by the pressure exerted on the dilator stem by the thumb of the practitioner that he will have previously inserted into the ring at the back of the dilator shaft. The dilator shaft penetrates and dilates the cervical canal. Plastic fins placed between the expandable protective tube and the dilator shaft separate the extensible protective tube to prevent contact, frontal resistance and friction of the dilator shaft on the wall of the cervical canal. This same action simultaneously deposits the plastic dilator sleeve that will shroud the cervical canal and protect it during the entire duration of the procedure. This dilator sleeve keeps spread the extensible protective tube and forms a tunnel that will also allow the practitioner to remove the dilator rod. He will be able to carry out the planned intervention. At the end of the procedure, this dilator sleeve is removed using the same dilator rod by turning a quarter turn on the right and pulling on the back to remove it. This will result in lowering the pressure of the cervical muscles and thus allow to remove the entire complete device with ease and security.

The penetration of the dilator rod is limited to a maximum of 50 mm by a stop formed by a narrowing of a conical portion located inside the support of the extensible protective tube. The average length of the cervical canal varies between 25 and 35 mm. For safety, the end of the penetrating portion of the dilator shaft is round and flexible and will therefore bend if there is contact with the walls of the uterine cavity to prevent laceration and / or perforation.

One of the main advantages of this invention is its ease of use and application. After the introduction of the speculum into the vagina, through which the gynecologist introduces the support-tube assembly extensible, the semi-rigid end (diameter 2 mm) of the dilator shaft is presented on the opening of the cervical canal (naturally open between 3.5 and 4.5 mm) and penetrates without effort and resistance in the cervical canal by pressing on the back of the support. In this way the extensible protective tube is placed in the cervical canal. The practitioner, pushing on the ring of the dilator shaft, dilates the cervical canal and positions the dilator sleeve inside the extensible protective tube allowing access of the intervention instruments in the uterine cavity. Then he removes the dilator rod and can begin his intervention.

BRIEF DESCRIPTION OF THE ILLUSTRATIONS

In order to facilitate understanding of the invention, the details of an exemplary implementation of the invention are shown by the following illustrations:

- FIG 1: shows the shape of the speculum to facilitate diagnostic examinations and surgical procedures inside the uterus, seen in perspective;

- FIG 2: shows the speculum to facilitate the diagnostic examinations and surgical interventions inside the uterus, seen in profile;

FIG. 3 shows the speculum assembled by medical plastic elements;

FIG 4 shows the entire support of the expansion device;

FIG. 5 shows the dilator sleeve which will be positioned by the dilator rod inside the support of the extensible protective tube and introduced into the cervical canal, forming in the same cervical canal a protection tunnel during the intervention;

FIG. 6 shows the assembly of the dilator rod with the pusher ring to effect and facilitate the expansion;

FIG. 7 shows the finned guide which is positioned at the outlet of the support of the extensible protective tube which will be placed on top of it. This set allows easy penetration of the dilator shaft into the cervical canal without contact or friction with the walls of the cervical canal; FIG. 8 shows the extensible protective tube made of medical plastic which expands during the passage of the dilator shaft;

- FIG 9: shows the locking ring with the threads inside to lock on the end of the support the fin guide and the extensible protective tube; and

FIG. 10 shows an upper view of the assembly of the extensible protective tube under which the finned guide is located. This assembly is fixed by the locking ring on the end of the support inside which is already positioned the dilator shaft, ready to be activated to expand the cervical canal and position the dilator sleeve.

DESCRIPTION OF THE INVENTION

Figure 1 shows the shape of the disposable medical speculum instrument to facilitate diagnostic examinations and surgical procedures inside the uterus, packaged in sterile pouch ready for use. In Figure 1 we see the body of speculum 1 of new form composed of its upper spoon 12 with the reduced end 121 and its lower spoon 13 with the reduced end 131 and the conical ring 14 which gives the conical rear shape of the body of speculum 1 extended handle 2, built with a rear tilt 21. Once the speculum is positioned in the vagina, the support 3 will be introduced, by its rear part, through the speculum 1. At the end of the support 3 are already fixed the extensible protective tube 8, the finned guide 7 with the fins 71 by means of the ring 9. The latter comprises in its interior the screw threads 91 which are screwed on the no screws 34 of the support 3. In this way the protection and expansion assembly, as well as the expansion sleeve 5, are ready to be introduced by simply pushing on the rear ring 61 of the dilator rod 6 until abutting on the depth limiter created by the conical narrowing portion 33 of the support 3 which at the same time limits the penetration of the sleeve 5 and the dilator rod 6.

This set will thus be positioned safely in the cervical canal. Inside the dilator rod 6 is already positioned the guide rod 69 having the role of introducing the expandable protective tube 8, the finned guide 7 and the fins 71 into the cervical canal and, also, thanks to its guide rod transverse 64, hook the dilator rod 6 on the hooks 312 and 322 to allow the dilator rod 6 to slide in the working axis. Once dilation is achieved and the dilator sleeve 5 positioned in the cervical canal, it will suffice to pull on the rear ring 61 of the dilator rod 6 to remove it, together with the guide rod 69, from the support 3. In this way the free passage is left for the instruments provided for the intervention.

Figure 2 shows the profile view of the disposable medical device, speculum to facilitate diagnostic examinations and surgical procedures inside the uterus. On the top is visible the end of the instrument with the assembly of the finned guide 7 and fins 71 of the previous Figure 1, on which is fixed the entire extensible protective tube 8, which has in its middle a enlarged cylindrical portion 87. This expandable protective tube 8 expands from 2 to more than 12 millimeters.

The entire speculum is made of medical plastic shown in FIG. 3, where the body of the speculum 1, which narrows forwards and divides into an upper spoon 12 with its slightly inclined and narrowed end 121, is seen. and a symmetrical lower spoon 13 with its slightly inclined and narrowed end 131. The rear of the body of the speculum 1 is presented in the form of a conical ring 14, continuing by a handle 2 slightly inclined towards the rear and having a depression, or reservation, on the rear part 21. In this depression it is possible to integrate the assembly 25 with directional light, and possibility of positioning a lighting source 26 shown in Figure 3a. It is possible to bring a strong cold directing light 27 which will propagate inside the speculum to illuminate the entrance of the cervical canal to facilitate the introduction into the extensible protective tube 8 of the various instruments used during the treatment. intervention.

FIG. 4 shows the support 3 in which will be positioned on the front part: the finned guide 7 with over the extensible tube 8. The finned guide 7 and the extensible tube 8 are locked by the locking ring 9. protective sleeve 5 and the dilator rod 6 will be positioned inside and behind the support 3, ready to be introduced inside the fin guide 7. The action of pushing on the rod 6 will allow its front end 68 consisting of a series of portions to progressively remove the fins 71 and the extensible tube 8 which will exert a lateral force on the walls of the cervical canal and, thus, dilate it. The support 3 is designed as an assembly with two right-hand and 32-left side arms, which extend through wide conical terminations 31 1 and 321. In the inner part of these terminations are positioned hooks 312 and 322 for receiving the left and right portions of the handle of the transverse guide rod 64 of the guide rod 69. The side openings 31 and 32 are integrally designed with a narrowing portion front conical 33 on which are engraved upper grooves 35 and lower 36 in which will be clipped the ends 121 and 131 of the speculum. The portion 34 has a thread that corresponds to the internal screw thread 91 of the locking ring 9. The end of the support 3 terminates in the form of a conical ring 37.

FIG. 5 shows the dilator bushing 5 which will be positioned at the center of the support 3 and whose end will be slightly inserted into the rear part of the extensible protective tube 8, the finned guide 7 and the fins 71. This dilator sleeve 5 has in its conical rear portion 51 two transverse windows upper 52 and lower 53 (not visible in the image), in which will be introduced the two protrusions 651 on the left and 652 on the right (not visible on the dilator rod 6 ). The conical portion 51 continues in the tubular portion 54, which constitutes the protective tunnel of the cervical canal during the procedure and which keeps apart, the finned guide 7 and the expandable tube 8.

Figure 6 shows the dilator rod 6 with the ring 61 at its rear end. The hollow portion is in the form of a hollow tube 62. The upper portion 621 of the slot 63 is fixed on the ring 61. The lower part 622 of the slot 63 is also fixed on the ring 61. The handle of the transverse guide rod 64 slides along this opening on which is fixed the end of the guide rod 69. In the middle of this opening are protuberances 632 and 631 (not visible in the diagram) behind which the rod transverse guide 64 will stay hooked and withdraw at the same time The tube 62 represents the thickest part of the dilator rod 6 and its end 66 abuts against the narrowing portion 33, acting as a depth limiter. At the other end of the tube 62 of the dilator rod 6, left and right and symmetrically, are positioned two protuberances 651 (not visible) and 652, which will hang the windows 52 and 53 to extract the dilator sleeve 5 at the end of the procedure, which will have the effect of releasing the lateral pressure exerted on the walls of the cervical canal. This action will also allow the finned guide 7 and the tube 8 to return to their original position in order to extract the complete device. The tube 62 narrows through the conical portion 66 and extends through the tube 67 of the dilator shaft 6, and terminates with a series of different sized portions 68, acting as dilator beads.

The series of portions 68 will be positioned at the outlet 37 of the support 3 and will be in contact with the inner portion of the fins 71 covered with the tube 8, and ready to spread laterally by the thrust on the dilator rod 6.

The rod 6, after spacing the fins and the tube 8, will introduce the end of the sleeve 5 to the entrance of the uterus.

The series of portions 68 of the rod 6 will be 15 mm inside the uterus and in front of the socket 5.

By pulling on the ring 61 the practitioner removes the rod 6 and the guide rod

69, which will have the effect of releasing the tunnel inside the sleeve 5 which will remain well positioned throughout the intervention.

FIG. 7 shows the assembly of the finned guide 7 with at its end the narrowed end 74 to facilitate their positioning in the extensible protective tube 8. This assembly is made of elastic medical plastic which is positioned on the cylindrical end 37 of the support 3 of the extensible protective tube 8 and the finned guide 7. This assembly, in which the tube 67 and the series of portions 68 of the dilator rod 6 are introduced, is intended to facilitate the introduction of the extensible protective tube 8, whose role is to isolate the walls of the cervical canal from the friction made by the ends 67 and 68 of the dilator rod 6. The portion 72 (similar to a tube in FIG. 7) corresponds to the joining of the fins 71 assembled and kept tight 8. The portion 70 has a conical shape, its end has 5 independent fins 71 to the end 74. These fins are joined inside the extensible protective tube 8 and form the tube 72. fins have on their outer part three protrusions 73 each whose role is to allow, after expansion and positioning of the expandable protective tube 8, traction of the uterus towards the outside of the vagina so that it takes an ideal position and facilitate endoscopic vision of the uterine cavity.

The tube 72 is thus the continuity of the five fins 71 which, between the conical portion 70 and the tube 72, have three hinged tabs each allowing their adaptation to the inner shapes 82, 83 and 84 of the tube 8.

The expansion is effected by the series of portions 68 by sliding inside the fins 71 which separate the tube 8.

The fins 71, of the same material as the rod 6, facilitate the sliding (plastic against plastic) of the rod 6 and laterally separate the tube 8 by preventing it from exiting forward. This action greatly reduces the force exerted to perform the dilation of the cervical canal.

Figure 8 shows the extensible protective tube 8 made of medical plastic and consisting of nine segments. The segment 81 is the widest of all, it is positioned on the fin guide 7, the fins 71 and over the conical hollow portion 70. The conical portion of the segment 81 narrows to reach the segment 82 which narrows him even to the segment 83 and continues to the portion 85 of the expandable protective tube 8 which has the shape of a cylindrical tube and which, in its middle, has an enlarged cylindrical portion 87, a space of about 1 mm which will leave room for the protrusions 73. Following this is formed the beginning of the conical widening 86 of the extensible protective tube 8 which continues on 15 mm on the central segment 87 and ends with a conical narrowing 88 to its end cylindrical 89.

FIG. 9 shows the locking ring having a cylindrical portion 92 which extends towards the conical portion 93 of the locking ring 9. Inside there is the thread 91 which corresponds with the thread 34 of the support 3 for screwing, locking the extensible protective tube 8, the finned guide 7 and the fins 71 on the end of the support 3. FIG. 10 shows the view over the entire support 3 with the extensible protective tube 8 inside which is the finned guide 7 and the fins 71 which are assembled and locked with the aid of the ring 9 on the end of the support 3, in which is located the dilator sleeve 5 inside which is positioned the guide rod 69 which has the role of introducing into the cervical canal the expandable protective tube 8 with the guide with fins 7 and the fins 71. Then the handle of the transverse guide rod 64 locks the assembly on the back of the support 3 with the help of the protuberances 312 and 322. Thus the support 3, the guide rod 69, the expandable protective tube 8, the fin guide 7 and the fins 71, form an assembly whose end is introduced into the cervical canal ready to receive the end of the dilator rod 6 having the role of expanding the fins 7 and the extensible protective tube 8 and position, in same time, the dilator sleeve 5 which will create the protection tunnel during the intervention. The guide rod 69, located inside the dilator rod 6, and the dilator rod 6 will be removed at the same time leaving the free passage for the instruments. The dilator sleeve 5 will be easily removed from the cervical canal by re-introducing the dilator shaft 6 and turning it slightly to the right. Once hooked on the windows 52 and 53 located on the conical rear portion of the sleeve 5. It will be sufficient to pull the dilator rod 6 back, which will have the effect of narrowing the finned guide 7 and the fins 71, as well as the extensible protective tube 8 and thus allow the entire device to be removed from the cervical canal and the vagina. This device will then be deposited in the medical waste container.

To better understand how this invention works we will describe how the gynecologist will use this device in his office. After preparing the patient and positioning her on the examination table, the gynecologist takes the sterile speculum packaging to dilate the cervix, facilitate diagnostic examinations and surgical procedures inside the uterus. In this main packaging will be packaged separately, on the one hand, the body of speculum 1 with handle 2 made of medical plastic. On the other hand, previously mounted in a another bag the dilator rod 6 in which will already be positioned the guide rod 69 and the dilator sleeve 5. This assembly will be positioned in the support 3, and hooked with the aid of the transverse guide rod 64 in the protrusions 312 and 322. On the front end of the support 3 will already be positioned the fin guide 7 and the fins 71, also made of medical plastic, covered with extensible protective tube 8 made of medical materials. The assembly will be locked by the locking ring 9 on the conical end 37 of the support 3. To use the gynecologist takes the spoons 12 and 13 between the thumb and index finger folded to bring the ends 121 and 131 to introduce the speculum into the vagina by pushing it forward. Once the speculum is introduced into the vagina, it automatically deviates. Then it positions the lamp (FIG 3a) by housing it in the rear hollow portion of the handle 21 and adjusts the light flux 27. This light input will allow it to direct the entire support 3 and position the front part in the opening of the cervical canal. Holding with four fingers placed in front of the handle 2 of the speculum, the gynecologist pushes with his thumb on the tapered rear part of the support 3 and pushes it completely into the conical rear part of the body of the speculum 1, which guarantees that the Guide rod 69 will completely introduce into the cervical canal to the entrance of the uterus the extensible protective tube assembly 8, the finned guide 7 and the fins 71. Then to perform the cervical dilation and position the dilator sleeve 5, the gynecologist will introduce his thumb in the ring 61 positioned on the rear of the dilator shaft 6, and will perform a progressive push before abutting against the limiter or portion of narrowing 33 Then, pulling the ring 61 back, the gynecologist effortlessly removes the dilator rod 6 at the same time as the guide rod 69, which has the effect of clearing the passage for the various instruments to the uterine cavity through the extensible protective tube 8. At the end of the procedure the gynecologist again introduces the dilator rod 6 to abut against the conical portion of the sleeve 5, he slightly rotates the rod 6 on the right to pick the windows 52 and 53 with the excrescences 651 and 652. Then the gynecologist removes the assembly with the sleeve 5 and releases the tension exerted on the finned guide 7, the fins 71, and the extensible protective tube 8. This allows to remove effortlessly the entire device with all its integrated elements that will be deposited in a medical waste container.

Claims

1. Device for dilatation of the uterine cervical canal, characterized in that it comprises:

a support (3);

- a dilator rod (6) mounted in translation in said support (3);

an extensible protective tube (8) fixed at one end (37) of the support (3);

- a finned guide (7) housed in the extensible protective tube (8) and fixed to said end (37) of the support (3); and

- a dilator bushing (5) mounted on the dilator rod (6), said dilator rod (6) being adapted to move the fins (71) of said fin guide (7) inside the extensible protective tube (8) and introducing a tubular portion (54) of said dilator sleeve (5) into the fin guide (7) housed in the expandable protective tube (8).

2. A cervical canal dilatation device according to claim 1, characterized in that the dilator rod (6) comprises at one end a guide rod (69) connected by a series of portions (68) of different sizes to a tube (62, 67) of said dilator shaft (6), the size of said portions (68) decreasing from said tube (62, 67) to said guide rod (69), for example from 12 to 2 mm, said guide rod having a diameter substantially equal to 2 mm.

3. Uterine cervical canal dilatation device according to claim 2, characterized in that the tube (62) of said dilator shaft (6) comprises a slot (63) in which slides a transverse guide rod (64), the support (3) having hooks (312, 322) adapted to engage said transverse guide rod (64) on each side of said tube (62) of the dilator shaft (6).

4. Uterine cervical canal dilation device according to one of claims 1 to 3, characterized in that the support (3) comprises a narrowing portion (33) forming a limit stop in translation of the dilator rod (6) in the support, said displacement in translation being for example substantially equal to 50 mm.

5. Uterine cervical canal dilatation device according to claim 4, characterized in that the tubular portion (54) of the dilator sleeve (5) is integral with a conical portion (51) abutting in said narrowing portion (33) of the support (3) at the end of travel in translation of the dilator rod (6).

6. Uterine cervical canal dilatation device according to claim 5, characterized in that said conical portion (51) of the dilator sleeve (5) comprises two windows (52, 53) in which are adapted to be introduced respectively two excrescences (651, 652) of the dilator rod (6) during a withdrawal, by said dilator rod (6), of said expansion sleeve (5) out of the fin guide (7) housed in the expandable protective tube (8) .

Uterine cervical canal dilatation device according to one of Claims 1 to 6, characterized in that the fin guide (7) comprises a plurality of vanes (71), for example five vanes (71), mounted on a conical portion (70) of the fin guide (7), and movable between a rest position, wherein the fins (71) are gathered and held tight within the expandable protective tube (8), and an expansion position , in which the fins (71), after separation by the dilator rod (6), are kept apart by the expansion sleeve (5) inside the extensible protective tube (8).

8. Uterine cervical canal dilatation device according to claim 7, characterized in that the fins (71) have on an outer part projections (73), and for example three excrescences per fin (71) cooperating in said position. for expanding with an enlarged cylindrical portion (87) of the expandable protective tube (8).

9. Vaginal speculum comprising a body (12, 13, 14) extended by a handle (2), characterized in that the body (12, 13, 14) forms a housing for the support (3) of a device Cervical canal dilation according to one of Claims 1 to 8.

Vaginal speculum according to claim 9, characterized in that the body comprises an upper spoon (12) and a lower spoon (13) mounted on a conical ring (14), the ends (121, 131) of said lower spoons ( 12) and upper (13) clipping respectively in two grooves (35, 36) etched on the support (3) of the uterine cervical canal dilation device.