AU2021100649A4 - Device for pushing up amniotic sac in cervical cerclage - Google Patents

Abstract

The invention discloses a device for pushing up an amniotic sac in a cervical cerclage, and the device includes a plurality of upper and lower fenders, wherein the upper fenders and the lower fenders are identical in number and arranged in one-to-one correspondence, the upper fenders and the lower fenders are rotationally connected through connecting shafts, and the upper fenders are rotationally connected to a top end of an inner fixation rod through connecting shafts; and the lower fenders are connected to an outer push-pull sleeve rod through connecting shafts, and the edges and connections of the upper and lower fenders are smoothed and ground to avoid scratching a fetal membrane. The outer push-pull sleeve rod can be pushed up to spread a tray-like top structure for pushing up the amniotic sac to the level of an intra-cervical orifice during the cerclage; and the outer push-pull sleeve rod can be pulled down to retract the tray-like top structure for facilitating the withdrawal thereof from the uterus. The device is simple in structure, convenient to operate and low in cost and can be reused after sterilization. FIG. 1

Description

FIG. 1

DEVICE FOR PUSHING UP AMNIOTIC SAC IN CERVICAL CERCLAGE BACKGROUND OF THE INVENTION

[0001] 1. Technical Field

[0002] The invention relates to a medical tool, and in particular, relates to a device

for pushing up an amniotic sac in a cervical cerclage.

[0003] 2. Description of Related Art

[0004] Cervical incompetence refers to the early painless dilation of cervix uteri in

the second or later stages of pregnancy, accompanied with the expansion of the gestational

sac into the vagina, subsequently leading to the premature rupture of fetal membrane and

the delivery of immature fetus. It is one of the common reasons for habitual abortion and

premature delivery in later stages of pregnancy. Currently, cervical cerclage is one of the

main methods for treating the cervical incompetence.

[0005] At present, the method for pushing up an amniotic sac is typically to cover

the amniotic sac with normal saline gauze and push up the amniotic sac into the uterine

cavity as deep as possible. However, this may cause an upper side of the gauze to be

stitched with a suture during suturing, and a needle needs to be withdrawn for suturing

again, which increases the injury to a patient; and on the other hand, the large size of the

gauze may cause the stripping of a large area of amniotic membrane from an uterine wall

to result in "an artificial membrane stripping effect", which leads to the local release of a

large amount of prostaglandin F2a and induces postoperative uterine contractions,

resulting in an increase in the rate of premature rupture of the fetal membrane and an

increase in the failure rate of cerclage.

[0006] In the prior art, Chinese Patent Application No. 201420437676.2 with

Publication No. CN203953773U and the title of "Silicone Holder Applicable to Cervical

Cerclage" is disclosed. The silicone holder is made of silicone and consists of a supporting section protruding downward on a front end and a handle fixed at a lower end of the supporting section. This silicone holder has the following disadvantages: on one hand, the large size also results in the artificial membrane stripping effect; and on the other hand, after the suturing is completed, the top end of the holder cannot be reduced in size to adapt to the reduced cervical orifice after a cerclage, for withdrawal.

[0007] Therefore, there is an urgent need for a tool capable of pushing up the

amniotic sac in a cervical cerclage, wherein the tool is small in size and can be reduced in

size by pushing up a top end to adapt to the reduced cervical orifice after the cervical

cerclage suturing is completed, and the tool is simple in structure and convenient to

operate and facilitates the pushing-up of the amniotic sac in operative procedures.

BRIEF SUMMARY OF THE INVENTION

[0008] An object of the invention is to provide a device for pushing up an amniotic

sac in a cervical cerclage, to solve the problems raised in the above background art.

[0009] To achieve the object above, the invention employs the following technical

solutions.

[0010] A device for pushing up an amniotic sac in a cervical cerclage includes a

plurality of upper and lower fenders, wherein the upper fenders and the lower fenders are

identical in number and arranged in one-to-one correspondence; the upper fenders and the

lower fenders are rotationally connected through connecting shafts; the upper fenders are

rotationally connected to a top end of an inner fixation rod through connecting shafts; and

the lower fenders are connected to an outer push-pull sleeve rod through connecting shafts.

When the outer push-pull sleeve rod is pushed up, the upper and lower fenders

simultaneously spread like a tray to push up the amniotic sac to a level of the

intra-cervical orifice, so that the upper fenders may protect the amniotic sac from

protruding outwards, and the lower fenders prevent a suture needle from reaching the amniotic sac when the cervix uteri is sutured, thereby reducing the risk of piercing the amniotic sac by the suture needle during the cerclage; and at the end of suturing, the outer push-pull sleeve rod is pulled down to retract and withdraw both the upper and lower fenders against the inner fixation.

[0011] The outer push-pull sleeve rod is sleeved outside and slidably connected to

the inner fixation rod, and the length of the outer push-pull sleeve rod is half of the length

of the inner fixation rod; the plurality of fenders are equidistantly distributed in a

circumferential direction with the outer push-pull sleeve rod as a center line, and the

plurality of lower fenders are equidistantly distributed in a circumferential direction with

the outer push-pull sleeve rod as a center line; and the upper fenders and the lower fenders

are both elastic metal plates, with edges and connections smoothed and ground to avoid

scratching the fetal membranes; and the upper fenders are structured as arc-shaped

concave pieces, the lower fenders are structured as arc-shaped convex pieces, and an

upper body of the inner fixation rod has a grooved structure which adapts to the shapes of

the upper fenders and the lower fenders.

[0012] As a preferred solution of the invention, the upper fenders and the lower

fenders both have a number of eight, and the inner fixation rod and the outer push-pull

sleeve rod are both octahedral columnar rods.

[0013] Compared with the prior art, the invention has the following beneficial

effects: the device is simple in structure, convenient to operate and low in cost; the outer

push-pull sleeve rod can be pushed up to spread a tray-like top structure for pushing up the

amniotic sac to the level of an intra-cervical orifice during the cerclage; and the outer

push-pull sleeve rod can be pulled down to retract the tray-like top structure for

facilitating the withdrawal thereof from the uterus.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0014] FIG. 1 shows a perspective view according to the invention.

[0015] FIG. 2 shows an enlarged partial view of a structure according to the

invention.

[0016] In the drawings, reference signs are as follows: 1-upper fender, 2-lower

fender, 3-outer push-pull sleeve rod, and 4-inner fixation rod.

DETAILED DESCRIPTION OF THE INVENTION

[0017] The technical solutions in the embodiments of the invention will be

described clearly and completely below in conjunction with the accompanying drawings

in the embodiments of the invention. Obviously, the embodiments described are merely

some instead of all of the embodiments of the invention. Based on the embodiments of the

invention, all the other embodiments obtained by those ordinarily skilled in the art without

making inventive efforts shall fall within the protection scope of the invention.

[0018] In the description of the invention, it should be noted that the terms such as

"center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer"

indicate directions or positional relations based on the directions or position relations as

shown in the accompanying drawings only for the purpose of describing the invention and

simplifying the description, instead of indicating or implying that a referred device or

element must have a specific direction or must be constructed and operated in a specific

direction. Therefore, these terms should not be construed as limiting the invention. In

addition, the terms "first", "second", and "third" are intended for a descriptive purpose

only, and should not be construed as indicating or implying relative importance.

[0019] In the description of the invention, it should be noted that, unless otherwise

expressly specified and defined, the terms "install", "connected with", and "connected to"

should be understood in a broad sense. For example, a connection may be a fixed connection, or a detachable connection or an integral connection; may be a mechanical connection or an electrical connection; and may be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two elements. For those of ordinary skills in the art, the specific meanings of the above terms in the present disclosure can be understood in a specific context.

[0020] Embodiment 1:

[0021] Referring to FIGs. 1 to 2, a device for pushing up an amniotic sac in a

cervical cerclage includes a plurality of upper fenders 1 and lower fenders 2, wherein the

upper fenders 1 and the lower fenders 2 are identical in number and arranged in

one-to-one correspondence; the upper fenders 1 and the lower fenders 2 are rotationally

connected through connecting shafts; the upper fenders 1 are rotationally connected to a

top end of an inner fixation rod 4 through connecting shafts; and the lower fenders 2 are

connected to an outer push-pull sleeve rod 3 through connecting shafts.

[0022] Specifically, the outer push-pull sleeve rod 3 is sleeved outside and slidably

connected to the inner fixation rod 4, and the length of the outer push-pull sleeve rod 3 is

half of the length of the innerfixation rod 4 to facilitate the operation.

[0023] Further, the plurality of upper fenders 1 are equidistantly distributed in a

circumferential direction with the inner fixation rod 4 as a center line, and the plurality of

lower fenders 2 are equidistantly distributed in a circumferential direction with the outer

push-pull sleeve rod 3 as a center line.

[0024] The upper fenders 1 and the lower fenders 2 are both elastic metal plates,

which have edges and connections smoothed and ground to avoid scratching the fetal

membranes and may be bent within a certain range. The upper fenders 1 are structured as

arc-shaped concave pieces, the lower fenders 2 are structured as arc-shaped convex pieces,

and an upper body of the inner fixation rod 4 has a grooved structure which adapts to the

shapes of the upper fenders 1 and the lower fenders 2.

[0025] When the device is used, the outer push-pull sleeve rod 3 is first pushed up

to reduce a distance between its top end and a top end of the inner fixation rod, and the

upper fenders 1 and the lower fenders 2 spread under external pushing till a maximum

extent when the top ends of the upper fenders 1 and lower fenders 2 reach a unified

horizontal plane. After the device is used, the outer push-pull sleeve rod 3 is pulled

reversely to increase the distance between its top end and the inner fixation rod 4, and the

upper fenders 1 and the lower fenders 2 retract under pulling until the upper fenders 1 and

lower fenders 2 spread and then are appressed to the inner fixation rod 4.

[0026] The device is simple in structure, convenient to operate and low in cost; the

outer push-pull sleeve rod 3 can be pushed up to spread a tray-like top structure for

pushing up the amniotic sac to the level of an intra-cervical orifice during the cerclage;

and the outer push-pull sleeve rod 3 can be pulled down to retract the tray-like top

structure for facilitating the withdrawal thereof from the uterus.

[0027] Embodiment 2:

[0028] Based on Embodiment 1, the upper fenders 1 and the lower fenders 2 both

have a number of eight, and the inner fixation rod 4 and the outer push-pull sleeve rod 3

are both octahedral columnar rods which may limit the traveling direction of the outer

push-pull sleeve rod 3 on the inner fixation rod 4, thereby preventing the outer push-pull

sleeve rod 3 and the inner fixation rod 4 from relative rotation.

[0029] For those skilled in the art, the invention is obviously not limited to the

details of the above exemplary embodiments, and can be implemented in other specific

forms without departing from the spirit or basic features of the invention. Therefore, the

embodiments should be regarded as non-limiting examples for every point. The scope of

the invention is defined by the appended claims rather than the description above.

Therefore, all the variations that fall within the meaning and scope of equivalent important

elements of the claims shall be construed as being incorporated within the invention. Any reference signs in the claims should not be construed as limiting the referred claims.

[0030] In addition, it should be understood that, although the specification is

described in terms of embodiments, each embodiment by no means includes only one

independent technical solution. The specification is set forth in a manner merely for clarity,

and those skilled in the art should take the specification as a whole, where the technical

solutions in each embodiment may also be combined properly to develop other

embodiments that can be understood by those skilled in the art.

[0031] It will be understood that the term "comprise" and any of its derivatives

(eg comprises, comprising) as used in this specification is to be taken to be inclusive of

features to which it refers, and is not meant to exclude the presence of any additional

features unless otherwise stated or implied.

[0032] The reference to any prior art in this specification is not, and should not be

taken as, an acknowledgement or any form of suggestion that such prior art forms part of

the common general knowledge.

Claims (7)

What is claimed is:

1. A device for pushing up an amniotic sac in a cervical cerclage, characterized by

comprising a plurality of upper fenders (1) and lower fenders (2), wherein the upper

fenders (1) and the lower fenders (2) are identical in number and arranged in one-to-one

correspondence; the upper fenders (1) and the lower fenders (2) are rotationally connected

through connecting shafts; the upper fenders (1) are rotationally connected to a top end of

an inner fixation rod (4) through connecting shafts; the lower fenders (2) are connected to

an outer push-pull sleeve rod (3) through connecting shafts; and the outer push-pull sleeve

rod (3) is sleeved outside and slidably connected to the inner fixation rod (4).

2. The device for pushing up the amniotic sac in the cervical cerclage according to

Claim 1, characterized in that the length of the outer push-pull sleeve rod (3) is half of the

length of the inner fixation rod (4).

3. The device for pushing up the amniotic sac in the cervical cerclage according to

Claim 2, characterized in that the plurality of upper fenders (1) are equidistantly

distributed in a circumferential direction with the inner fixation rod (4) as a center line,

and the plurality of lower fenders (2) are equidistantly distributed in a circumferential

direction with the outer push-pull sleeve rod (3) as a center line.

4. The device for pushing up the amniotic sac in the cervical cerclage according to

Claim 3, characterized in that the upper fenders (1) and the lower fenders (2) are both

elastic metal plates, with edges and connections smoothed and ground to avoid scratching

a fetal membrane.

5. The device for pushing up the amniotic sac in the cervical cerclage according to

Claim 4, characterized in that the upper fenders (1) are structured as arc-shaped concave

pieces, the lower fenders (2) are structured as arc-shaped convex pieces, and an upper

body of the inner fixation rod (4) has a grooved structure which adapts to the shapes of the

upper fenders (1) and the lower fenders (2).

6. The device for pushing up the amniotic sac in the cervical cerclage according to

Claim 3, characterized in that the upper fenders (1) and the lower fenders (2) both have a

number of eight.

7. The device for pushing up the amniotic sac in the cervical cerclage according to

Claim 6, characterized in that the inner fixation rod (4) and the outer push-pull sleeve rod

(3) are both octahedral columnar rods.