CN114145823A - Instrument for cervical dilatation - Google Patents

Abstract

An apparatus for cervical dilatation comprises a body and an infusion tube. The body includes an axis along which the material is distributed and dried to form an integral strip, including a proximal end and a distal end, the proximal end being placed into the cervical canal prior to the distal end. The length of the infusion tube is larger than that of the body, the infusion tube comprises a first tube body and a second tube body, the first tube body is assembled on the body and used for distributing liquid to all places of the body so as to provide more liquid, improve the expansion rate of the material after liquid absorption and shorten the expansion time. The second tube body is exposed out of the body, so that clinical operation of the body is facilitated. The instrument for cervical dilatation provided by the invention can control the expansion rate of materials at all positions, so that the dilatation trends of all positions on the axial cavity wall of the cervix are synchronous, and the cavity expanding time is further shortened.

Description

Instrument for cervical dilatation

Technical Field

The invention relates to a medical instrument, in particular to an instrument for expanding a cavity, which is used for shortening the time required by cavity expansion and is beneficial to clinical quick diagnosis and treatment of patients.

Background

The cervix is composed primarily of connective tissue, with a small amount of smooth muscle, elastic fibers, and blood vessels. The cervical dilatation operation is mainly aimed at cervical health, firstly, a vagina is opened by an endoscope, the cervix is fully exposed, and then, a uterine dilating rod or a medicine is used, so that the cervix is expanded to facilitate the operation of a uterine cavity, foreign matters in the uterine cavity are effectively discharged, and the artificial operation is facilitated.

The mechanical dilator is composed of a plurality of metal devices with different specifications, and the outer diameters of the metal devices are in a series from small to large, so that the purpose of gradually expanding the cervix is realized. However, because each specification is distributed in a step shape, natural transition means is lacked among devices of each specification, and therefore, the device still causes laceration, bleeding or puncture of tissues during application. In order to solve this drawback, a disposable cervical dilator made of an expandable material is produced, which utilizes the property of the material to self-expand after imbibing liquid, and in a more gentle manner, the cervix is gradually expanded as the material expands.

In practice, the material is limited to imbibition for a relatively long time, while it helps to gently dilate the cervix, it is difficult to achieve rapid (e.g., within a few minutes, at least 30 minutes) dilation of the cervix, and the preparation time before surgery is usually relatively long. On the other hand, the different liquid absorption amounts of the expandable materials in the cavity cause different expansion speeds at different parts, and the larger difference of the expansion conditions of the materials at different parts along the axial direction of the expansion rod causes uneven stress at different parts of the cervix, which not only causes discomfort to patients, but also causes longer actual time for expanding the cervix, and cannot meet the requirements of clinical diagnosis and treatment of patients.

Disclosure of Invention

One object of the present invention is to provide an instrument for cervical dilatation, which is convenient for clinical placement in the cavity for performing dilatation surgery.

Another object of the present invention is to provide an apparatus for cervical dilatation, which can increase the liquid-absorbing expansion rate of the material, reduce the cervical dilatation time, and facilitate the clinical quick diagnosis and treatment of patients.

It is a further object of the present invention to provide an apparatus for cervical dilation that reduces the rate of fluid absorption of material along the axis, reduces the difference in forces applied to the cervical cavity wall, and improves comfort.

It is still another object of the present invention to provide an apparatus for dilating a cervix which applies a force to a wall of the cervix to cause the cervix to dilate simultaneously to increase the comfort of the user.

The invention provides an instrument for cervical dilatation, which comprises

The body comprises an axis, the material is distributed along the axis and dried into an integral strip shape, the strip shape comprises a near end and a far end, the near end is placed in the cervical canal before the far end, and the outer diameter of the near end is smaller than that of the far end;

the transfer line, its length is greater than the body, including first body and second body, first body is used for distributing liquid to each department of body, and the second body exposes in the body, and is specific to expose in the body from the distal end, does benefit to and holds to implement the operation to the body, if: the body is placed into the cervical canal, the body is taken out of the cervical canal, and the liquid is input into the first tube body, so that more liquid is provided, the expansion rate of the material after imbibing is improved, and the expansion time is shortened.

The first pipe body is assembled to the body, for example: the first tube body is connected with the body or in clearance fit with the body. Preferably, the first tube is disposed within the body, i.e., the first tube is encased in the material from which the body is made, and the fluid from the first tube is distributed throughout the body, and the dried material absorbs the fluid and expands and exerts a force on the walls of the cervical canal to expand the canal.

In one embodiment, the first tube is a clearance fit with the body, i.e., the first tube slides along the axial direction of the body under the action of the second tube (e.g., without limitation, pulling, or guiding). The moving speed of the first tube body is adjusted, so that materials at each position in the axial direction of the body absorb liquid from the first tube body, the expanded materials at each position exert acting force on each position of the cervical canal wall, the difference of acting force applied to each position of the cervical canal wall is reduced, and each position of the cervical canal wall expands towards synchronization.

In another specific embodiment, the first tube is fixed in the body, and at least 1 liquid outlet hole is arranged on the side wall of the first tube along the axial direction of the first tube, so that the liquid is distributed to the materials at each position through the liquid outlet holes, and the materials at each position along the axial direction of the body absorb the liquid and then expand, acting force is applied to each position of the cervical canal wall, so that each position on the axial cavity wall of the cervix expands synchronously, and the difference of acting force applied to each position on the cervical canal wall is reduced.

According to the actual situation, the material of the proximal end is more compact, and therefore needs to absorb more liquid, which is equivalent to the force applied to the cervical canal wall everywhere at the distal end, and therefore the number of the outlet holes of the first tube body located at the proximal end is denser than the number of the outlet holes of the first tube body located at the distal end. Such as: along the axial direction from the near end to the far end, the density of liquid outlet holes arranged on the first tube body is continuously reduced, so that all parts on the axial cavity wall of the cervix are expanded to be synchronous, all parts of the cervix are stressed more uniformly, and the cavity expanding time is further shortened.

In order to facilitate the infusion to the infusion tube, one end of the infusion tube is also provided with a connecting seat for connecting with an infusion device, for example: a syringe.

The body is usually made of a porous material, made of a polymer foam material, compressed and dried, and then expanded to restore its original shape after imbibing. Polymers such as: polyvinyl alcohols and polyesters (e.g., polyurethanes and polycarbonates), and the like.

The technical scheme of the invention has the following beneficial effects:

according to the cervical dilation instrument provided by the invention, the infusion tube is placed into the material of the body, and additional liquid is input for supplement, so that the dilation of the material after imbibition is promoted, the dilation rate of the material is accelerated, the cervical dilation time is favorably shortened, and the cervix is dilated within 10 minutes.

According to the cervical dilation instrument provided by the invention, the liquid outlet hole is formed in the liquid conveying pipe, liquid is distributed to materials at each position, and the expansion rate of the materials at each position is controlled, so that the dilation at each position on the axial cavity wall of the cervix tends to be synchronous, the difference of acting force applied to each position on the axial cavity wall of the cervix is reduced, and the comfort is improved.

The instrument for cervical dilatation provided by the invention is used for holding the second tube body, so that the body can be conveniently placed into a cavity in clinical manual operation.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the apparatus for cervical dilation in accordance with the present invention;

fig. 2 is a schematic structural view of an embodiment of the apparatus for cervical dilation in accordance with the present invention;

fig. 3 is a partially enlarged structural view of an embodiment of the first tube of the cervical dilation apparatus of the present invention.

Detailed Description

The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings. Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Fig. 1 is a schematic structural view of an embodiment of the apparatus for cervical dilatation of the present invention. As shown in fig. 1, the cervical dilation instrument of the present embodiment includes a body 100 and an infusion tube 200, wherein the infusion tube 200 has a length greater than that of the body 100.

In this embodiment, the body 100 includes an axis 130, and the material is distributed along the axis 130 and dried (e.g., high temperature baked) to form a generally elongated shape including a proximal end 110 and a distal end 120. In practice, proximal end 110 is placed into the cervical canal prior to the distal end, and proximal end 110 has an outer diameter smaller than that of distal end 120, facilitating entry of the instrument into the cervix, and then assisting in the mechanical initial dilation of the cervix.

The infusion tube 200 includes a first tube 210 and a second tube 220, the first tube 210 being connected to the body 100 for dispensing the liquid to the body 100. Such as: one end of the opening 211 is opened, and the liquid in the tube body flows out from the opening 211 and is absorbed by the material, and the swelling rate of the material after absorbing the liquid is accelerated, so that the acting force can be favorably exerted on the wall of the cervical canal to expand the cervix.

To facilitate the infusion of fluid into the infusion tube 200, a connection hub 300 is also provided at one end of the infusion tube 200.

Fig. 2 is a schematic structural view of an embodiment of the apparatus for cervical dilation in accordance with the present invention. As shown in fig. 2, in order to increase the expansion rate of the material, the first tube 210 is placed in the body 100, that is, the first tube 210 is wrapped in the material of the body to make the instrument for cervical dilatation, the liquid flowing out of the first tube 210 is distributed around the body, and the dried material absorbs the liquid to expand and exert force on the wall of the cervical canal to expand the canal.

The second tube 220 is exposed outside the body 100 to provide a working surface for clinical operation. In practical applications, the second tube 200 is made of a hard material (such as but not limited to metal, wood, bamboo, hard rubber or plastic, etc.) and has rigidity, so that the second tube 220 can be held by a hand or an instrument and the body can be manipulated, for example: placing the body into the cervical canal, removing the body from the cervical canal, and delivering the fluid into the first tube 210 to provide more fluid, increase the rate of expansion of the material after imbibing, and reduce the time to expand.

The first tube 210 is in clearance fit with the body 100, that is, the first tube 210 is acted on (such as but not limited to pulling, pulling or guiding) by the second tube 220, and the first tube 210 slides along the axial direction of the body 100. Such as: by placing the first tube 210 at the proximal end 110 and allowing fluid to flow out of the first tube end opening 211, the material of the proximal end 110 will pick up more fluid and expand more rapidly than the material of the rest of the body 100, and then moving the first tube 210 toward the distal end 120 will pick up fluid from the material of the proximal end 110 to the material of the distal end 120 in sequence and increase the rate of expansion of the body 100. The moving speed of the first tube 210 is adjusted so that the material at each position along the axial direction of the body 100 absorbs the liquid from the first tube 210, and the expanded material at each position exerts an acting force on each position of the cervical canal wall, so that the difference of the acting force at each position on the cervical canal wall is reduced, and the expansion at each position on the axial canal wall of the cervix tends to be synchronous.

Fig. 3 is a partially enlarged structural view of an embodiment of the first tube of the cervical dilation apparatus of the present invention, and referring to fig. 2, as shown in fig. 3, the first tube 210 is fixed in the body 100, and at least a plurality of liquid outlet holes 212 are formed on a side wall of the first tube 210 along an axial direction of the first tube 210, so that liquid is distributed to materials at various positions through the liquid outlet holes 212, and the materials at various positions along the axial direction of the body 100 absorb the liquid and expand, thereby applying an acting force to various positions of a cervical canal wall and reducing a difference of the acting force applied to various positions of the cervical canal wall. To control the amount of liquid absorbed by the body material and the rate of expansion, the exit openings in the first tube 210 at the forward end of the first tube 100, i.e., near the proximal end 100, are more dense and have a greater amount of liquid, allowing the proximal end 110 to expand more quickly than other portions of the body (e.g., the distal end). Along the axial direction from the proximal end 110 to the distal end 120, the density of the holes arranged on the first tube body 210 is continuously reduced, so that the expansion of each part on the axial cavity wall of the cervix tends to be synchronous, the stress of each part of the cervix is more uniform, and the expanding time of the cavity channel is further shortened.

Claims (11)

1. An apparatus for cervical dilation, comprising:

the body comprises an axis, the material is distributed along the axis and dried into an integral strip shape, the strip shape comprises a near end and a far end, and the near end is placed in the cervical canal before the far end;

the infusion tube is longer than the body and comprises a first tube body and a second tube body, wherein the first tube body is assembled on the body and used for distributing liquid to all positions of the body, the second tube body is exposed out of the body, and the liquid is input into the first tube body through the second tube body.

2. The apparatus for cervical dilation according to claim 1, wherein an outer diameter of said proximal end is smaller than an outer diameter of said distal end.

3. The apparatus of claim 1, wherein said first tube is encased in a material from which said body is formed, liquid flowing from said first tube is distributed throughout said body, and said dried material absorbs the liquid and expands and exerts a force on the walls of the cervical canal to dilate the canal.

4. The apparatus for cervical dilation according to claim 1, wherein said first tube is a clearance fit with said body, and said first tube slides axially along said body by said second tube.

5. The apparatus for cervical dilation according to claim 4, wherein the rate of movement of the first tube is adjusted so that the material at each location along the axial direction of the body absorbs liquid from the first tube, so that the expanding material exerts a force on the walls of the cervical canal at each location, reducing the difference in force exerted on the walls of the cervical canal at each location, and synchronizing the dilation of the walls of the cervical canal toward each location.

6. The apparatus for cervical dilation according to claim 1, wherein said first tube includes at least 1 exit hole.

7. The apparatus according to claim 1, wherein said first tube is fixed in said body, and at least a plurality of liquid outlets are provided on said first tube sidewall along the axial direction of said first tube, so that the liquid is distributed to the materials at all positions through said liquid outlets, and the materials at all positions along the axial direction of said body absorb the liquid and expand, and exert the force on all positions of the cervical canal wall, so that the expansion tends to be synchronous at all positions on the axial wall of the cervix, and the difference of the force exerted on all positions on the cervical canal wall is reduced.

8. The apparatus of claim 7, wherein said first tube at said proximal end has a greater concentration of exit holes than said number of exit holes in said first tube near said distal end.

9. The apparatus for dilating the cervix of claim 7, wherein the concentration of the fluid outlets formed in the first tube decreases continuously along the axial direction from the proximal end to the distal end, so that dilation tends to be synchronous at various positions on the axial cavity wall of the cervix, the force applied to various positions of the cervix is more uniform, and the opening time of the canal is further shortened.

10. The apparatus for cervical dilation according to claim 1, wherein a connection seat is further provided at one end of the infusion tube.

11. The apparatus for cervical dilation according to claim 1, wherein said body is made of PVA sponge.

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