CN217472034U

CN217472034U - Tissue grabber

Info

Publication number: CN217472034U
Application number: CN202123389747.5U
Authority: CN
Inventors: 王文军; 王传杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-09-23
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a tissue grabber, which comprises an inner needle, an inner needle sleeve, a puncture needle, a slider for pushing the inner needle, a sleeve clamp for clamping and pushing the inner needle sleeve and a fixer for fixedly connecting the puncture needle, wherein the inner needle, the inner needle sleeve and the puncture needle are sequentially arranged from inside to outside, the slider is sleeved on the fixer and can slide on the fixer, and the sleeve clamp is sleeved on the slider and can slide on the slider; the utility model has the advantages of simple structure, press from both sides the slip on the fixer through slider, sleeve pipe and just can snatch the tissue, especially when needing the multiple pregnancy to subtract the child, press from both sides the high rate of accuracy of dead embryo.

Description

Tissue grabber

Technical Field

The utility model relates to an auxiliary reproduction technical field, more specifically relate to a tissue grabber.

Background

With the popularization of the assisted reproduction technology in China, the ovulation induction medicine is widely applied to infertility treatment, the most common complication of the superovulation treatment is multiple pregnancy, and the multiple pregnancy with more than 3 fetuses obviously increases pregnancy complications and leads to the increase of the disease death rate of perinatal infants. At this time, multiple pregnancies early in gestation are important as a remedy to control the number of embryos and births.

The commonly used methods for reducing the fetus at present mainly comprise transvaginal fetal reduction in the early pregnancy and abdominal fetal reduction in the middle pregnancy. The main modes of vaginal injection include embryo aspiration, mechanical pounding and KCL intracardiac injection. The method comprises the steps of selecting a 16G-18G puncture needle through early transvaginal fetal reduction, slowly inserting the puncture needle from a fornix part of a vagina under the guidance of a vaginal B-ultrasound, aligning the puncture needle with a fetal heart beating position along a puncture line in the needle inserting process, further puncturing a fetal heart beating point of a embryo body, rotating the needle point to see linkage of the embryo body and confirm that the embryo body is punctured, after determining that the puncturing needle point is positioned in the embryo, performing negative pressure suction, if no suction substance exists in the puncture needle tube, further confirming that the needle point is positioned in the embryo, rapidly increasing negative pressure, sucking to see that the embryo tissue suddenly disappears, and indicating that a white tissue sample is mixed in the puncture needle tube, thereby prompting that the embryo tissue is sucked out and not sucking amniotic fluid as much as possible. The aspirate is observed under a microscope and the somite structure of the embryo is visible, indicating that the embryo has disintegrated and some or all of the embryo has been aspirated. The slightly larger embryo is difficult to be sucked under negative pressure, and the method of repeatedly puncturing the embryo heart and sucking the embryo heart can be adopted until the fetal heart stops beating. Because the embryo is large, no liquid or a little blood can be pumped back when the needle point enters the fetal heart beating area, then 0.6-2ml of 10% KCL is injected, the fetal heart beating disappears through ultrasonic display, and after 5-10min, repeated beating is observed again to confirm that the embryo is not jumped, so that the success of fetal reduction is prompted. However, the accuracy of needle insertion is reduced due to the influence of the length of the embryo bud in the actual operation process, and in addition, when the tire reducing needle is positioned in the embryo bud, no matter is sucked, and the effect of the tire reducing operation is influenced due to the fact that the embryo tissue blocks the tire reducing needle hole.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a tissue grabber gets into the tissue through the pjncture needle inside to snatch corresponding tissue, the embryo that subtracts of specially adapted embryo dies unnecessary embryo clamp in with many child pregnancy, the utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:

a tissue grabber comprises an inner needle, an inner needle sleeve, a puncture needle, a sliding block for pushing the inner needle, a sleeve clamp for clamping and pushing the inner needle sleeve and a fixer for fixedly connecting the puncture needle, wherein the inner needle, the inner needle sleeve and the puncture needle are sequentially arranged from inside to outside, the sliding block is sleeved on the fixer in an axially slidable manner, and the sleeve clamp is sleeved on the sliding block in an axially slidable manner;

the tail end of the insertion end of the inner needle is provided with a forceps clip which is in a needle shape when closed and in a V shape when opened, and the far end of the inner needle is fixedly connected to the sliding block;

the inner needle sleeve is in a hollow tubular shape with openings at two ends, a first cavity for accommodating the inner needle to freely pass in and out is arranged in the inner needle sleeve, and the far end of the inner needle sleeve is clamped by the sleeve clamp; when the jaws are disposed outside the insertion end of the inner needle cannula, the jaws are in an open state and tissue is disposed within the jaws, and when the jaws are received within the insertion end of the inner needle cannula, the jaws are in a closed state and grip tissue;

the puncture needle is in a hollow tubular shape with openings at two ends, the end face of the insertion end of the puncture needle is an inclined plane, a second cavity for accommodating the inner needle sleeve and the inner needle to freely enter and exit is arranged in the puncture needle, and the far end of the puncture needle is fixedly connected to the fixer;

the fixer is a hollow structure with a through side surface, the insertion end of the fixer is fixedly connected with the far end of the puncture needle, and the hollow structure is communicated with the second cavity;

the sliding block is of a hollow structure with openings at two ends, a partition plate is arranged along the diameter of the hollow structure and divides the hollow structure into a third cavity and a fourth cavity, two sides of the hollow structure respectively penetrate through the third cavity and the fourth cavity, and the sliding block can slide in the hollow structure; one end of the partition board is provided with a thin through hole, the other end of the partition board is provided with a thick through hole, the side surface of the sliding block is provided with a strip-shaped hole, the strip-shaped hole is communicated with the thin through hole and the thick through hole, and the sleeve clamp is inserted into the strip-shaped hole; the far end of the inner needle passes through the second cavity, the hollow structure, the thick through hole and the strip-shaped hole and is fixed on the thin through hole;

the cannula clamp is of a semicircular structure, a clamping plate extends towards the direction of the circle center from the inner periphery, the clamping plate is inserted into the strip-shaped hole, and a semicircular notch used for clamping the inner needle cannula is formed in the tail end of the clamping plate; the far end of the inner needle sleeve penetrates through the second cavity, the hollow structure and the thick through hole and is clamped in the semicircular notch.

Furthermore, the sliding block radially extends outwards to form a disc structure convenient for hand pushing.

Furthermore, the insertion end of the fixer axially and inwards extends to form an extension thin section which is convenient for supporting the inner needle sleeve and the inner needle, through holes for the inner needle sleeve and the inner needle to pass through are respectively formed in the two ends of the extension thin section, the through holes are communicated with the second cavity and the hollow structure, and one end of the extension thin section is fixedly connected with the far end of the puncture needle.

Further, the handle is connected with the far end of the fixer.

Furthermore, the handle on be provided with the hole, the fixer is kept away from the end and is extended the locking structure who has the convenience with the hole chucking, locking structure is 2 semi-cylinders that separate a certain distance, and the top surface radial outside extension of semi-cylinder has the arch.

Furthermore, the outer peripheral surface of the inner needle sleeve is sleeved with a silica gel sleeve for preventing liquid from leaking, and the silica gel sleeve is arranged between the outer peripheral surface of the inner needle sleeve and the inner peripheral surface of the puncture needle.

Furthermore, a hemispherical surface for enhancing the reflection of the B ultrasonic signal is arranged on the peripheral surface of the insertion end of the puncture needle.

Furthermore, the far end of the inner needle sleeve is of a structure with thick ends and thin middle parts, which is convenient to be clamped with the semicircular notch of the sleeve clamp.

Terms such as "inner", "outer", and the like, used herein to denote relative spatial positions, are used herein for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model has the advantages of simple structure, press from both sides the slip on the fixer through slider, sleeve pipe and just can snatch the tissue, especially when needing the multiple pregnancy to subtract the child, press from both sides the high rate of accuracy of dead embryo.

(2) The utility model discloses an outer peripheral face that the pjncture needle inserted the end is provided with the punctiform second arch of reinforcing B ultrasonic signal reflection, can be under the guide of B ultrasonic smooth arrival need the tissue of snatching.

(3) The utility model discloses an inner needle sheathed tube insert end outer peripheral face cover be equipped with the silica gel cover that prevents the liquid and leak outward, the silica gel cover sets up between the inner peripheral face of inner needle sheathed tube outer peripheral face and pjncture needle, prevents that amniotic fluid or other tissue fluids from flowing out.

Drawings

Fig. 1 is a perspective view of a tissue gripper.

FIG. 2 is an assembled perspective view of the inner needle, the inner needle cannula and the puncture needle.

Fig. 3 is an exploded view of the holder, slider, sleeve clamp, and handle.

Fig. 4 is a perspective view of the slider.

Fig. 5 is another perspective view of the slider.

Fig. 6 is an exploded view of the retainer and handle.

Fig. 7 is a perspective view of a ferrule holder.

Fig. 8 is an exploded view of the inner needle, inner needle cannula and puncture needle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1: the tissue grabber as shown in fig. 1 to 6 comprises an inner needle 1, an inner needle sleeve 2, a puncture needle 3, a slider 4 for pushing the inner needle, a sleeve clamp 5 for clamping and pushing the inner needle sleeve 2 and a fixer 6 for fixedly connecting the puncture needle 3, wherein the inner needle 1, the inner needle sleeve 2 and the puncture needle 3 are sequentially arranged from inside to outside, the slider 4 is sleeved on the fixer 6 in an axially sliding manner, and the sleeve clamp 5 is sleeved on the slider 4 in an axially sliding manner;

the tail end of the inner needle insertion end 11 is provided with a jaw 12, the jaw 12 is needle-shaped when closed, the jaw 12 is V-shaped when opened, and the inner needle far end 13 is fixedly connected to the sliding block 4;

the inner needle sleeve 2 is in a hollow tubular shape with two open ends, a first cavity (not shown in the figure) for accommodating the free entry and exit of the inner needle 1 is arranged in the inner needle sleeve, and the far end 22 of the inner needle sleeve is clamped by the sleeve clamp 5; when jaws 12 are positioned outside of inner needle cannula insertion end 21, jaws 12 are in an open position and tissue is positioned within interior 13 of jaws 12, and when jaws 12 are received within inner needle cannula insertion end 21, jaws 12 are in a closed position and grasp tissue;

the puncture needle 3 is in a hollow tubular shape with openings at two ends, the end surface of the puncture needle insertion end 31 is an inclined surface, a second cavity 32 for accommodating the inner needle sleeve 2 and the inner needle 1 to freely enter and exit is arranged in the puncture needle, and the far end 33 of the puncture needle is fixedly connected on the fixer 6;

the fixer 6 is a hollow structure 66 with a through side surface, the fixer insertion end 61 is fixedly connected with the puncture needle far end 33, and the hollow structure 65 is through the second cavity 32;

in this embodiment, the insertion end 61 of the holder extends axially inward to form a thin extension section 62 for supporting the inner needle cannula 2 and the inner needle 1, two ends of the thin extension section 62 are respectively provided with a through hole 63 for the inner needle cannula 2 and the inner needle 1 to pass through, the through hole 63 is communicated with the second cavity 32 and the hollow structure 66, one end 64 of the thin extension section is fixedly connected with the distal end 33 of the puncture needle, and the other end 65 of the thin extension section is fixedly connected with the insertion end 61 of the holder.

The sliding block 4 is a hollow structure with openings at two ends, a partition plate 41 is arranged along the diameter of the hollow structure, the partition plate 41 partitions the hollow structure into a third cavity 42 and a fourth cavity 43, two sides 67 of the hollow structure 66 respectively penetrate through the third cavity 42 and the fourth cavity 43, and the sliding block 4 can slide in the hollow structure 66; one end 44 of the partition board is provided with a thin through hole 45, the other end 46 of the partition board is provided with a thick through hole 47, the side surface 48 of the sliding block is provided with a strip-shaped hole 49, the strip-shaped hole 49 is communicated with the thin through hole 45 and the thick through hole 47, and the sleeve clamp 5 is inserted into the strip-shaped hole 49; the inner needle far end 22 passes through the first cavity (not shown in the figure), is sleeved in the inner needle sleeve 2, passes through the second cavity 32 together with the inner needle sleeve 2, extends through holes 63 at two ends of the thin section 62, a hollow structure 66, a thick through hole 47 and a strip-shaped hole 49, and is fixed on the thin through hole 45;

the cannula clamp 5 is of a semicircular structure, a clamping plate 51 extends towards the direction of the circle center from the inner periphery, the clamping plate 51 is inserted into the strip-shaped hole 49, and a semicircular notch 53 for clamping the inner needle cannula 2 is formed in the tail end 52 of the clamping plate; the distal end 22 of the inner needle cannula passes through the second cavity 32, the hollow structure 66 and the thick through hole 47 and is clamped in the semicircular notch 53.

When the tissue grabber is used, taking the example of clamping redundant embryos in multiple pregnancy as an example, when the sliding block 4 slides to the rightmost side of the hollow structure 66 of the fixer 6, and the cannula clamp 5 slides to the rightmost side of the strip-shaped hole 49 in the partition plate 41, the inner needle 1 is accommodated in a first cavity (not shown in the figure) in the inner needle sleeve 2, meanwhile, the inner needle sleeve 2 is accommodated in a second cavity 32 in the puncture needle 3, at the moment, the puncture needle 3 is slowly inserted into the puncture needle 3 from a vaginal vault under the guidance of the vagina B ultrasound, the needle 3 is inserted into the puncture needle 3 along the puncture line to be aligned with the fetal heart beating position, the sliding block 4 slides to the leftmost side of the hollow structure 66 of the fixer 6, the inner needle 1 is pushed out of the inner needle sleeve 2, the jaw 12 of the inner needle insertion end 11 is opened to be in a V shape, the embryos are placed in the jaw 12, at the leftmost side, at the moment, the sliding cannula clamp 5 slides to the leftmost side of the strip-shaped hole 49 in the partition plate 41, the inner needle cannula inserting end 21 is close to the jaw 12, finally the jaw 12 is accommodated in the inner needle cannula inserting end 21, the jaw 12 is closed to clamp the embryo, then the sliding block 4 slides to the rightmost side of the hollow structure 66 of the fixer 6, meanwhile, the cannula clamp 5 slides to the rightmost side of the strip-shaped hole 49 in the clapboard 41, the jaw 12 is accommodated in the first cavity (not shown in the figure) of the inner needle cannula 2, the inner needle cannula 2 is accommodated in the second cavity 32 of the puncture needle 3, and then the puncture needle 3 is withdrawn, thus completing the operation.

In some embodiments, the slider 4 extends radially outwardly with a disc structure 461 to facilitate manual pushing.

In some embodiments, the tissue gripper further comprises a handle 7 connected to the distal end 68 of the holder. The handle 7 is provided with a hole 71, the fastener extends away from the end 68 to form a locking structure 69 for facilitating the fastening with the hole 71, the locking structure 69 is 2 half cylinders 691 separated by a certain distance, and a protrusion 692 extends radially outwards from the top surface of each half cylinder 691.

In some embodiments, the inner needle cannula outer peripheral surface 23 is sleeved with a silicone sleeve 24 for preventing leakage of fluid, and the silicone sleeve 24 is disposed between the inner needle cannula outer peripheral surface 23 and the puncture needle inner peripheral surface 34.

In some embodiments, the outer peripheral surface 35 of the needle insertion end 31 is provided with a hemispherical surface 36 to enhance the reflection of B-mode ultrasound signals.

In some embodiments, the inner needle cannula distal end 22 is of a thick middle thin construction at both ends to facilitate gripping with the semicircular indentations 53 of the cannula holder 5.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A tissue grabber is characterized by comprising an inner needle, an inner needle sleeve, a puncture needle, a sliding block for pushing the inner needle, a sleeve clamp for clamping and pushing the inner needle sleeve and a fixer for fixedly connecting the puncture needle, wherein the inner needle, the inner needle sleeve and the puncture needle are sequentially arranged from inside to outside, the sliding block is sleeved on the fixer in an axially sliding manner, and the sleeve clamp is sleeved on the sliding block in an axially sliding manner;

the inner needle sleeve is in a hollow tubular shape with openings at two ends, a first cavity for accommodating the inner needle to freely pass in and out is arranged in the inner needle sleeve, and the far end of the inner needle sleeve is clamped by the sleeve clamp; when the jaws are disposed outside the insertion end of the inner needle cannula, the jaws are in an open state and tissue is disposed within the jaws, and when the jaws are received within the insertion end of the inner needle cannula, the jaws are in a closed state and clamp the tissue;

the puncture needle is in a hollow tubular shape with openings at two ends, the end surface of the insertion end of the puncture needle is an inclined surface, a second cavity for accommodating the inner needle sleeve and the inner needle to freely enter and exit is arranged in the puncture needle, and the far end of the puncture needle is fixedly connected to the fixer;

the sliding block is of a hollow structure with openings at two ends, a partition plate is arranged along the diameter of the hollow structure and divides the hollow structure into a third cavity and a fourth cavity, two sides of the hollow structure respectively penetrate through the third cavity and the fourth cavity, and the sliding block can slide in the hollow structure; one end of the partition board is provided with a thin through hole, the other end of the partition board is provided with a thick through hole, the side surface of the sliding block is provided with a strip-shaped hole, the strip-shaped hole is communicated with the thin through hole and the thick through hole, and the sleeve clamp is inserted into the strip-shaped hole; the far end of the inner needle penetrates through the second cavity, the hollow structure, the thick through hole and the strip-shaped hole and is fixed on the thin through hole;

2. The tissue grasper of claim 1 wherein said slide block extends radially outwardly to form a disc structure for facilitating manual pushing.

3. The tissue gripping device as claimed in claim 1, wherein the insertion end of the anchor extends axially inward to form a thin extension section for supporting the inner needle cannula and the inner needle, the two ends of the thin extension section are respectively provided with a through hole for the inner needle cannula and the inner needle to pass through, the through hole is communicated with the second cavity and the hollow structure, and one end of the thin extension section is fixedly connected with the distal end of the puncture needle.

4. The tissue grasper of claim 1 further comprising a handle connected to the distal end of the holder.

5. The tissue grasping device according to claim 4, wherein the handle has an opening, and the distal end of the anchor extends with a locking structure for engaging the opening, the locking structure comprising 2 semi-cylinders spaced apart by a predetermined distance, and a protrusion extending radially outwardly from a top surface of the semi-cylinders.

6. The tissue grasping device according to claim 1, wherein a silicone sleeve for preventing leakage of the liquid is provided around the outer circumferential surface of the inner needle cannula, and the silicone sleeve is provided between the outer circumferential surface of the inner needle cannula and the inner circumferential surface of the puncture needle.

7. The tissue grasping device according to claim 1, wherein the outer peripheral surface of the insertion end of the puncture needle is provided with a hemispherical surface for enhancing the reflection of the B-mode ultrasonic signal.

8. The tissue grasper of claim 1 wherein the distal end of the inner needle cannula has a thick middle thin configuration to facilitate gripping with the semicircular notch of the cannula holder.