CN120241374B

CN120241374B - Trocar

Info

Publication number: CN120241374B
Application number: CN202510757935.2A
Authority: CN
Inventors: 袁海伦; 谢军; 李磊
Original assignee: Sieran Medical System Suzhou Co ltd; Shanghai Sieran Medical Technology Co ltd
Current assignee: Sieran Medical System Suzhou Co ltd; Shanghai Sieran Medical Technology Co ltd
Priority date: 2025-06-09
Filing date: 2025-06-09
Publication date: 2025-08-29
Anticipated expiration: 2045-06-09
Also published as: CN120241374A

Abstract

The invention provides a puncture outfit, which relates to the technical field of medical equipment, and comprises a needle placement pen and a puncture suite, wherein the puncture suite comprises a tip, the tip comprises a side cutting edge face positioned on the side face of the tip and an end cutting edge face positioned on the end face of the tip, the side cutting edge face gradually inclines towards the axis of the tip along the direction close to the end cutting edge face, the end cutting edge face is connected with the side cutting edge face, the end cutting edge face is obliquely arranged relative to the cross section of the tip, the needle placement pen comprises a holding front end and a position control rear end, the holding front end is connected with the position control rear end, the surface of the position control rear end facing a mounting channel is provided with a mounting structure, the mounting structure is used for being detachably connected with a needle seat, and the holding front end comprises a shell, a rotary lifting cylinder and a propping cylinder. The puncture outfit provided by the invention ensures the puncture force, simultaneously increases the strength of the needle tip, is not easy to cause tissue tearing or damage, and can reduce the operation cost.

Description

Puncture outfit

Technical Field

The invention relates to the technical field of medical instruments, in particular to a puncture outfit.

Background

In ophthalmic surgery, the puncture outfit is an indispensable precision instrument and is mainly used for complex operations such as anterior chamber puncture, vitreous body cutting, retina surgery and the like. The main function of the device is to establish a stable channel through puncturing tissues so that subsequent surgical instruments (such as a glass cutting head, an illumination optical fiber, a laser optical fiber and the like) can smoothly enter and finish corresponding operations.

In traditional ophthalmic puncture ware design, the most adoption of pointed end is single inclined plane or toper structure, and this kind of design can satisfy the demand of penetrating the tissue to a certain extent, ensures the establishment of operation passageway, but above-mentioned structure can make pointed end department intensity not good, and pointed end easily produces the crotch, causes the tissue to tear or damage easily in the needle extraction operation in-process. In addition, the conventional puncture outfit mostly adopts a disposable and single puncture mode, resulting in significant cost increase.

Disclosure of Invention

The invention aims to provide a puncture outfit, which ensures the puncture force and simultaneously increases the strength of a needle point, is not easy to cause tissue tearing or damage, and can reduce the operation cost.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The invention provides a puncture outfit, which comprises a needle placement pen and a puncture suite, wherein the puncture suite comprises a tip, the tip comprises a side cutting edge surface positioned on the side surface of the tip and an end cutting edge surface positioned on the end surface of the tip, the side cutting edge surface gradually inclines towards the axis of the tip along the direction close to the end cutting edge surface, the end cutting edge surface is connected with the side cutting edge surface, and the end cutting edge surface is obliquely arranged relative to the cross section of the tip;

the puncture kit comprises a puncture needle, a self-closing sleeve and a needle seat, wherein one end of the puncture needle is provided with a pointed end, and the other end of the puncture needle is connected with the needle seat;

The needle placing pen comprises a holding front end and a position control rear end, wherein the holding front end is connected with the position control rear end, a mounting channel for mounting the puncture suite is formed between the holding front end and the position control rear end, a mounting structure is arranged on the surface of the position control rear end facing the mounting channel, and the mounting structure is used for being detachably connected with the needle seat;

The holding front end comprises a shell, a screwing cylinder and a propping cylinder, wherein the screwing cylinder is connected with the rear end of the control position, the screwing cylinder is provided with a track groove, one end of the propping cylinder stretches into the screwing cylinder and is provided with a guide post which is in sliding fit with the track groove, the other end of the propping cylinder stretches out of the screwing cylinder and is provided with a propping flap, one end of the shell is rotatably sleeved outside the screwing cylinder and the propping flap, the other end of the shell is provided with a furling cavity, the inner wall of the shell is provided with a spiral groove matched with the guide post, and the guide post is guided by the spiral groove and the track groove to enable the propping cylinder to be close to or far away from the furling cavity.

In an alternative embodiment, the two side facets are arranged in two, the two side facets are disposed opposite each other with respect to any one longitudinal section of the tip, and the extension surfaces of the two side facets toward the direction approaching the end facets meet at the needle tip point.

In an alternative embodiment, the perpendicular distance between the plane of the end facet and the point of the needle tip is 0.05-0.5mm.

In an alternative embodiment, both of the side facets comprise a first facet, a second facet, and a third facet;

the first and third facets each extend to the end facet and meet at the side of the tip to form a first edge;

The second blade surface is connected between the first blade surface and the third blade surface and extends to the first blade edge towards the direction close to the end blade surface, the second blade surface and the first blade surface meet at the side face of the tip to form a second blade edge, and the second blade surface and the third blade surface meet at the side face of the tip to form a third blade edge.

In an alternative embodiment, the end facet forms an angle of 120-160 ° with the longitudinal section;

and/or the included angle between the two first edges of the two side edge surfaces is 10-13 degrees.

In an alternative embodiment, the first of the two side facets meets to form a fourth edge, the third of the two side facets meets to form a fifth edge, and the angle between the fourth edge and the fifth edge is 15-20 °.

In an alternative embodiment, the tip is overcoated with a coating of diamond-like carbon.

In an alternative embodiment, the self-closing sleeve comprises a cap, a sleeve base and a channel tube;

The sleeve base is sleeved outside the channel pipe;

One end of the channel pipe is connected with the sleeve base, the end part of the other end of the channel pipe comprises a transition section for reducing puncture resistance, and a protruding part for connecting with the pressure relief pipe is protruding from the inner wall of one end of the channel pipe connected with the sleeve base;

The cap body is buckled on the sleeve base, and the cap body is provided with a notch for the puncture needle to pass through.

The puncture outfit provided by the invention has the following beneficial effects:

In the puncture kit provided by the invention, as the side edge surface gradually inclines to the axis of the tip along the direction close to the end edge surface, the tip of the puncture kit can form a sharp structure, so that the tip can conveniently puncture a human body. The end face of the tip is also provided with an end blade face which is connected with the side blade face and is obliquely arranged relative to the cross section of the tip, so that the end blade face can be regarded as being formed by removing the tip on the basis of a sharp structure. When the rotary lifting cylinder is used, the rotary lifting cylinder can rotate relative to the shell, the guide post can enable the propping cylinder to be close to or far away from the furling cavity under the guidance of the spiral groove and the track groove, the propping valve is gradually contacted with the furling cavity and furled under the extrusion of the furling cavity in the process of being close to the furling cavity, and the propping valve is gradually separated from the furling cavity and is opened under the condition of no extrusion of the furling cavity in the process of being far away from the furling cavity.

Compared with the prior art, the puncture kit provided by the invention has the tip removing structure design at the tip, so that the puncture force is ensured, the strength of the needle tip is increased, the tip is not easy to generate a hook, the reliability of repeated puncture is ensured, and the tissue is not easy to tear or damage. In addition, the needle placement pen can be repeatedly utilized, and only the puncture suite is replaced after the operation is finished, so that the operation cost is reduced and the environmental burden is reduced while the use safety and effectiveness are ensured. Finally, the front end is held, so that the front self-closing sleeve can be moved to the far end after being reserved in the eyeball, and the supporting force can be provided for the rear self-closing sleeve when the rear self-closing sleeve enters the eyeball, multiple punctures can be realized, and the operation cost is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a three-dimensional structure of a tip according to an embodiment of the present invention;

FIG. 2 is a side view of a tip provided in an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of a portion of FIG. 2;

FIG. 4 is a front view of a tip according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of a portion of FIG. 4 at B;

FIG. 6 is a longitudinal cross-sectional view of a lancing kit according to an embodiment of the present invention;

FIG. 7 is an exploded view of a self-closing sleeve according to an embodiment of the present invention;

FIG. 8 is a longitudinal cross-sectional view of a self-closing sleeve provided by an embodiment of the present invention;

FIG. 9 is a front view of a first self-closing sleeve provided by an embodiment of the present invention;

FIG. 10 is a front view of a second self-closing sleeve provided in an embodiment of the present invention;

FIG. 11 is a front view of a third self-closing sleeve provided in an embodiment of the present invention;

FIG. 12 is a front view of a fourth self-closing sleeve provided by an embodiment of the present invention;

FIG. 13 is a front view of a fifth self-closing sleeve provided by an embodiment of the present invention;

FIG. 14 is a longitudinal section of the self-closing sleeve and pressure relief tube according to an embodiment of the present invention;

FIG. 15 is a schematic three-dimensional structure of a stylus according to an embodiment of the present invention;

FIG. 16 is a longitudinal sectional view of a stylus according to an embodiment of the present invention;

FIG. 17 is a partial cross-sectional view I of a needle placement pen as it is used to insert a penetration assembly according to an embodiment of the present invention;

FIG. 18 is a schematic view of a three-dimensional structure of a gripping front end according to an embodiment of the present invention;

FIG. 19 is a longitudinal cross-sectional view of a gripping front end according to an embodiment of the present invention;

FIG. 20 is a schematic three-dimensional view of a propping cylinder according to an embodiment of the present invention;

FIG. 21 is a schematic three-dimensional structure of a lifting cylinder according to an embodiment of the present invention;

FIG. 22 is a longitudinal cross-sectional view of a housing according to an embodiment of the present invention;

FIG. 23 is a second partial cross-sectional view of a lancet holder according to an embodiment of the present invention;

FIG. 24 is a schematic three-dimensional structure of a control position rear end according to an embodiment of the present invention;

FIG. 25 is a longitudinal section of a control position rear end according to an embodiment of the present invention;

FIG. 26 is a schematic three-dimensional view of a needle bar according to an embodiment of the present invention;

FIG. 27 is a schematic view of a three-dimensional structure of a push rod according to an embodiment of the present invention;

FIG. 28 is a schematic three-dimensional structure of a position control cylinder according to an embodiment of the present invention;

fig. 29 is a partial cross-sectional view III of a needle placement pen inserted into a puncture kit according to an embodiment of the present invention;

FIG. 30 is an enlarged schematic view of a portion of FIG. 29 at C;

FIG. 31 is a schematic three-dimensional structure of a ranging cap according to an embodiment of the present invention;

FIG. 32 is a front view of a ranging cap according to an embodiment of the present invention;

FIG. 33 is a second elevation view of a ranging cap according to an embodiment of the present invention;

FIG. 34 is a schematic view of a ranging cap according to an embodiment of the present invention in use;

FIG. 35 is a partial cross-sectional view of a lancet holder according to an embodiment of the present invention;

FIG. 36 is a schematic view of a partial three-dimensional structure of a needle placement pen when the puncture kit is inserted into the needle placement pen according to an embodiment of the present invention;

FIG. 37 is an exploded view of a puncture outfit according to an embodiment of the present invention;

Fig. 38 is a partial cross-sectional view of a puncture outfit according to an embodiment of the present invention.

1-Holding the front end; 11-a housing; 111-collapsing the cavity; 112-spiral groove, 113-buckling groove, 12-spiral lifting cylinder, 121-track groove, 1211-extension part, 1212-first limit part, 1213-second limit part, 122-guide opening, 123-bulge, 124-buckling hole, 13-propping cylinder, 131-guide pillar, 132-propping valve, 1321-abutting part, 2-position control rear end, 21-push rod, 211-spindle nose, 212-position control column, 213-guide hole, 214-notch, 22-needle setting rod, 221-mounting structure, 23-position control cylinder, 231-guide groove, 232-position control hole, 233-buckling head, 24-distance measuring cap, 241-scale point, 2411-first scale point, 2412-second scale point, 2413-third scale point, 3-puncture kit, 31-puncture needle, 311-side surface, 3111-first surface, 3112-second surface, 3113-third surface, 3114-first edge 3115-second edge 3116-third edge-guide post, 213-guide hole, 214-notch, 22-needle bar, 221-mounting structure, 23-position control cylinder, 231-guide groove, 232-position control hole, 233-buckling head, 24-ranging cap, 241-scale point, 2411-first scale point, 2412-third scale point, 2413-puncture kit, 31-puncture needle, 311-side surface, 3111-first edge surface, 3112-second edge 3112-third surface, 3113-third surface, 3114-edge surface, 3116-edge point, edge-3116-edge-32-edge-32-step-32-step-11-step-to be.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.

The present embodiment aims to provide a puncture outfit, comprising a puncture set 3, wherein the puncture set 3 comprises a tip, the tip comprises a side edge surface 311 positioned on the side surface of the tip and an end edge surface 312 positioned on the end surface of the tip, the side edge surface 311 is gradually inclined towards the axis of the tip along the direction approaching to the end edge surface 312, the end edge surface 312 is connected with the side edge surface 311, and the end edge surface 312 is obliquely arranged relative to the cross section of the tip, as shown in fig. 1.

It will be appreciated that the cross-section of the tip is perpendicular to the extension of the tip.

In the above embodiment, since the side edge surface 311 is gradually inclined to the axis of the tip in the direction approaching to the end edge surface 312, the tip of the puncture kit can form a sharp structure, thereby facilitating the penetration of the tip into the human body. The end face of the tip is also provided with an end facet 312, the end facet 312 is connected with the side facet 311 and the end facet 312 is disposed obliquely with respect to the cross section of the tip, so that the end facet 312 can be considered to be formed by removing the tip on the basis of a sharp structure.

Therefore, as the puncture kit has the tip removing structure design at the tip, the strength of the needle tip is increased while the puncture force is ensured, the reliability is higher under the condition of repeated puncture, the tip is not easy to generate a hook, and the tearing or damage to tissues is reduced.

In an alternative embodiment, as shown in fig. 2 and 3, the side facets 311 are arranged in two, the two side facets 311 are disposed opposite each other with respect to any one longitudinal section of the tip, and the extension surfaces of the two side facets 311 toward the direction approaching the end facet 312 meet at the needle tip point 34.

It will be appreciated that the longitudinal section of the tip is parallel to the extension of the tip and that the longitudinal section of the tip passes through the needle point 34.

In the above embodiment, the extending surfaces of the two side edge surfaces 311 can form a sharp structure at the tip of the puncture outfit, and the size of the wound can be gradually increased after the tip is penetrated into a human body such as an eyeball, so that the puncture resistance is reduced.

In an alternative embodiment, as shown in FIG. 3, the perpendicular distance d ₁ between the plane of the end facet 312 and the needle point 34 is 0.05-0.5mm.

The greater the perpendicular distance d ₁ between the plane of the end facet 312 and the needle point 34, the greater the de-sharpening portion shown in phantom in fig. 3 and vice versa. If the distance d ₁ is too large, too many points are removed, which can affect the piercing force of the tip, and if the distance d ₁ is too small, too few points are removed, the strength of the tip cannot be effectively increased.

Specifically, the distance d ₁ may be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5mm.

In an alternative embodiment, as shown in fig. 1, both side facets 311 comprise a first facet 3111, a second facet 3112, and a third facet 3113, wherein:

First and third facets 3111, 3113 each extend to end facet 312, first and third facets 3111, 3113 meeting at a tip side to form a first edge 3114;

Second facets 3112 are connected between first facets 3111 and third facets 3113 and extend to first edges 3114 in a direction toward end facets 312, second facets 3112 meet first facets 3111 at a side of the tip to form second edges 3115, and second facets 3112 meet third facets 3113 at a side of the tip to form third edges 3116.

In the above embodiment, each side facet 311 comprises three facets, first facet 3111, second facet 3112 and third facet 3113, with the tip forming a multi-stage progressive seven facet due to the two side facets 311 being configured, plus end facet 312.

When the eyeball is punctured, the first edge 3111 and the third edge 3113 in the end edge 312 and one of the side edges 311 preferentially puncture the eyeball into the eyeball, then the first edge 3111 and the third edge 3113 in the other side edge 311 puncture the eyeball, and finally the second edge 3112 puncture the eyeball, so that the wound surface of the eyeball is gradually increased, and the risk of rapid increase of intra-ocular pressure of a patient caused by overlarge puncture resistance is reduced.

Too large an angle between the two first edges 3114 of the two side facets 311 may result in a larger penetration force, a larger wound surface, and too small an angle between the two first edges 3114 may not be effective in increasing the strength of the tip, so in an alternative embodiment, as shown in fig. 2, the angle θ ₁ between the two first edges 3114 of the two side facets 311 is 10-13 °.

The angle θ ₁ between the two first edges 3114 may be specifically 10 °, 11 °, 12 °, or 13 °.

Preferably, the angle θ ₁ between the two first edges 3114 is 11 °.

Too large an angle between the two third edges 3116 of the two side facets 311 may result in a larger penetration force, a larger wound surface, and too small an angle between the two third edges 3116 may not be effective in increasing the strength of the tip, so that in an alternative embodiment, as shown in fig. 2, the angle θ2 between the two third edges 3116 of the two side facets 311 is 6-8 °.

The angle θ ₂ between the two third edges 3116 may be specifically 6 °,7 °, or 8 °.

Preferably, the angle θ ₂ between the two third edges 3116 is 7 °.

In an alternative embodiment, as shown in fig. 3, the end facets 312 are at an angle θ ₃ from 120 to 160 ° to the longitudinal section of the tip, with the two side facets 311 being disposed opposite to each other about the longitudinal section.

The smaller the included angle theta ₃ is, the smaller the actual sharp angle theta ₄ of the tip formed between the end blade surface 312 and the first blade edge 3114 is, the smaller the actual sharp angle theta ₄ is, the strength of the tip is also affected, the smaller the included angle theta ₃ is, the larger the actual sharp angle theta ₄ of the tip formed between the end blade surface 312 and the first blade edge 3114 is, the greater the actual sharp angle theta ₄ is, the penetration force is affected, the penetration resistance is increased, and the penetration resistance is prevented from being too large while the strength of the tip is ensured.

The included angle θ ₄ may be 120 °, 130 °, 140 °, 150 °, or 160 °.

Preferably, the included angle θ ₄ is 160 °.

In an alternative embodiment, as shown in fig. 4, the first and third facets 3111, 3113 are symmetrically disposed about the longitudinal cross-section of the tip at which the first edge 3114 is located, and the second facet 3112 itself is symmetrically disposed about the longitudinal cross-section of the tip at which the first edge 3114 is located.

In an alternative embodiment, as shown in fig. 1, a first edge 3111 of the two side edges 311 meets to form a fourth edge 3117 and a third edge 3113 of the two side edges 311 meets to form a fifth edge 3118.

In the above embodiment, the two side edges 311 are connected by the fourth edge 3117 and the fifth edge 3118, so that the tip can cut the eyeball sufficiently by each edge during penetration of the tip into the eyeball, thereby reducing penetration resistance.

Too large an included angle θ ₅ would result in a larger wound bed and too small an included angle θ ₅ would result in insufficient tip strength, so that in an alternative embodiment, as shown in fig. 1, the included angle θ ₅ between the fourth edge 3117 and the fifth edge 3118 is 15-20 °.

The included angle θ ₅ may specifically be 15 °, 16 °, 17 °, 18 °, 19 °, or 20 °.

Preferably, the included angle θ ₅ is 20 °.

In an alternative embodiment, as shown in fig. 5, the line between the intersection of the end facet 312 and the two first edges 3114 is perpendicular to the line between the intersection of the end facet 312 and the fourth edge 3117 and the fifth edge 3118, respectively.

In an alternative embodiment, the tip is overcoated with a coating of diamond-like carbon, which is capable of forming a stable lubricating layer on the tip surface, significantly reducing friction and improving the durability of the instrument.

Among them, diamond-like carbon is the existing material at present, and it has advantages such as high hardness, good corrosion resistance, anti-sticking nature, better biocompatibility.

In an alternative embodiment, as shown in fig. 6, the puncture kit includes a puncture needle 31, a self-closing sleeve 32 and a needle holder 33, wherein one end of the puncture needle 31 is a tip, the other end is connected with the needle holder 33, the self-closing sleeve 32 is configured in a plurality, and the plurality of self-closing sleeves 32 are sequentially sleeved outside the puncture needle 31 along the length direction of the puncture needle 31.

In use, each self-closing cannula 32 may be retained within the eyeball by multiple punctures.

In an alternative embodiment, as shown in fig. 7 and 8, the self-closing cannula 32 comprises a cap 321, a cannula base 322 and a channel tube 323, wherein the cannula base 322 is sleeved outside the channel tube 323, one end of the channel tube 323 is connected with the cannula base 322, the other end of the channel tube 323 comprises a transition section 3231 for reducing puncture resistance, the cap 321 is buckled on the cannula base 322, and the cap 321 is provided with a notch 3211 for allowing the puncture needle 31 to pass through.

In the above embodiment, the arrangement of the transition section 3231 is beneficial to reducing the puncture force when the puncture cannula enters the sclera, shortening the puncture time of a doctor and reducing the risk of the sudden rise of intra-ocular pressure of a patient caused by overlarge puncture resistance.

The outer surface of the transition section 3231 is obliquely arranged as shown in fig. 9, the outer diameter of the outer surface is gradually reduced along the direction gradually approaching to the end of the outer surface, an included angle theta ₆ formed by the outer surface of the transition section 3231 is 18 degrees, or the outer surface of the transition section 3231 is an arc surface as shown in fig. 10, the radius R corresponding to the arc surface is 0.3mm, or the transition section 3231 comprises two double inclined surfaces which are radially arranged along the channel pipe 323, the included angle theta ₇ formed by the double inclined surfaces is 30 degrees, or the transition section 3231 comprises four inclined surfaces which are axially and uniformly arranged around the channel pipe 323, the included angle theta ₈ formed by any two inclined surfaces which are oppositely arranged is 30 degrees, or the transition section 3231 comprises six inclined surfaces which are axially and uniformly arranged around the channel pipe 323, and the included angle theta ₉ formed by any two inclined surfaces which are oppositely arranged is 30 degrees, as shown in fig. 11.

The arrangement of the transition section 3231 can reduce the puncture resistance when two sections puncture the sclera, the puncture force when the channel tube 323 enters the sclera is smaller, the risk of the sudden rise of intra-ocular pressure of a patient caused by overlarge puncture resistance is reduced, faster and more stable puncture is brought to doctors, and traction damage at the sclera is reduced.

In an alternative embodiment, as shown in fig. 14, the inner wall of the end of the channel tube 323 connected with the cannula base 322 is convexly provided with a protruding portion 3232 for connecting with the pressure release tube 5, so that unnecessary risks of operation are prevented from being caused by falling off of the pressure release tube 5 due to pulling and moving during operation.

Specifically, the channel tube 323 can be made of stainless steel material through metal stamping, and the sleeve base 322 has an i-shaped structure and can be injection molded or injection molded. The channel tube 323 and the sleeve base 322 can be integrally formed by injection molding, or can be assembled and combined by bonding or ultrasonic welding.

In addition, the cap 321 is covered on the sleeve base 322, and the notch 3211 on the cap 321 can be a straight port, which can effectively prevent the surge of intraocular physiological saline in the process of the surgical instrument entering and exiting and stabilize intraocular pressure. Meanwhile, the self-closing sleeve 32 can be prevented from falling from the puncture needle 31 through the extrusion action of the straight opening, and the straight opening can not give a larger extrusion force to the puncture needle 31, so that the self-closing sleeve 32 can be reserved in the eyeball under the resistance applied by the eyeball.

In particular, the in-line port may be formed by sharp point cutting or ultrasonic cutting.

On the basis of the above embodiments, the puncture outfit further comprises a needle placement pen, as shown in fig. 15 to 17, the needle placement pen comprises a holding front end 1 and a position control rear end 2, the holding front end 1 is connected with the position control rear end 2, a mounting channel for mounting the puncture set 3 is formed between the holding front end 1 and the position control rear end 2, a mounting structure 221 is arranged on the surface of the position control rear end 2 facing the mounting channel, and the mounting structure 221 is used for being detachably connected with the puncture set 3.

When in use, the puncture set 3 can be arranged in the installation channel through the installation structure 221, a user can perform operation, after the operation is finished, the connection between the puncture set 3 and the installation structure 221 can be canceled, and when the puncture set 3 is used next time, a new puncture set 3 can be inserted into the installation channel and connected with the installation structure.

Therefore, the needle placement pen can be repeatedly utilized, and only the puncture set 3 is replaced after the operation is finished, so that the operation cost is reduced and the environmental burden is reduced while the use safety and effectiveness are ensured.

The detachable connection manner between the mounting structure 221 and the puncture set 3 may be various, for example, the mounting structure 221 is clamped with the puncture set 3, or the mounting structure 221 is screwed with the puncture set 3.

In an alternative embodiment, for the convenience of operation of a user, the mounting structure 221 and the puncture set 3 are connected by using a clamping connection manner, for example, the mounting structure 221 is in a convex structure, the outer surface of the needle seat 33 is concavely provided with a clamping groove, and the connection between the mounting structure and the puncture set is realized by clamping the convex structure and the clamping groove. Of course, the mounting structure 221 may also include a clamping groove, and the outer surface of the needle holder 33 has a protruding structure that is clamped with the clamping groove.

The structure of the grip front 1 is specifically described below:

In an alternative embodiment, as shown in fig. 18 to 22, the grip front end 1 includes a housing 11, a screwing cylinder 12, and a pressing cylinder 13, in which:

one end of the rotary lifting cylinder 12 is connected with the position control rear end 2, and the other end of the rotary lifting cylinder 12 is provided with a track groove 121;

One end of the propping cylinder 13 extends into the jacking cylinder 12 and is provided with a guide pillar 131, the guide pillar 131 can extend into the track groove 121 to be in sliding fit with the track groove 121, and the other end of the propping cylinder 13 extends out of the jacking cylinder 12 and is provided with a propping valve 132;

One end of the shell 11 is rotatably sleeved outside the rotary lifting cylinder 12 and the propping valve 132, the other end of the shell is provided with a furling cavity 111, and the inner wall of the shell 11 is provided with a spiral groove 112 matched with the guide post 131.

When in use, the rotary lifting cylinder 12 rotates relative to the shell 11, the guide post 131 is guided by the spiral groove 112 and the track groove 121, so that the propping cylinder 13 is close to or far away from the folding cavity 111, in the process of approaching to the folding cavity 111, the propping valve 132 is gradually contacted with the folding cavity 111 and folded under the extrusion of the folding cavity 111, in the process of far away from the folding cavity 111, the propping valve 132 is gradually separated from the folding cavity 111 and opened under the condition of not extruding the folding cavity 111.

The holding front end 1 can realize the folding and unfolding of the propping valve 132 by rotating the lifting cylinder 12, in the unfolded state, the puncture set 3 can extend into the mounting channel from the propping valve 132 to be connected with the mounting structure 221, meanwhile, as shown in fig. 23, in the operation process, the self-closing sleeve 32 in the puncture set 3 can also extend out from the propping valve 132, in the folded state, the end face of the propping valve 132 can be contacted with the end face of the self-closing sleeve 32 at the most distal end, and in the process that the self-closing sleeve 32 enters the eyeball, the self-closing sleeve 32 is supported, and the self-closing sleeve 32 is prevented from retreating towards the proximal end. Thus, the holding front end 1 not only can realize the distal movement of the rear self-closing sleeve 32 after the front self-closing sleeve 32 is reserved in the eyeball, but also can realize the support force for the rear self-closing sleeve 32 when the rear self-closing sleeve 32 enters the eyeball.

The propping block 132 comprises a plurality of blocks, as shown in fig. 20, which are uniformly distributed at intervals around the axis of the propping cylinder 13, and as shown in fig. 19, the closer to the left end of the propping block 132, the closer to the axis of the propping cylinder 13, the V-shaped gap is formed between two adjacent blocks, and the larger the V-shaped gap is formed closer to the left end of the block. With continued reference to fig. 19, the outer diameter of the cross section of the collapsing chamber 111 varies throughout the axial direction of the housing 11, with the outer diameter of the cross section of the collapsing chamber 111 being smaller as it approaches the left end face of the housing 11, so that the extent of collapsing is greater as the abutment flap 132 approaches the left end face of the housing 11.

As shown in fig. 19, the end of the flap body is protruded with an abutment portion 1321, and in the process of pushing the cylinder 13 to the left, the abutment portion 1321 can make the pushing flap 132 easier to be folded under the limit of the folding cavity 111.

In an alternative embodiment, to facilitate the guide post 131 entering the track groove 121, as shown in fig. 21, a guide port 122 communicating with the track groove 121 is provided on the end surface of the lift cylinder 12.

In use, the guide post 131 can enter the track groove 121 through the V-shaped guide opening 122 at the front end of the lifting cylinder 12, and then rotate into the inner cavity of the shell 11 through the cooperation of the guide post 131 and the spiral groove 112.

Specifically, as shown in fig. 21, the guide opening 122 may have a V-shape, and the closer to the end surface of the spin-up barrel 12, the larger the opening of the guide opening 122 is, so that the guide post 131 enters the guide opening 122. The guide opening 122 is located at an end of the end surface of the jack 12, which is slightly smaller than the guide post 131 in order to prevent the guide post 131 from being pulled out of the guide opening 122.

In an alternative embodiment, as shown in fig. 21, the track groove 121 has an extension 1211 extending in a direction parallel to the axis of the jack 12, so that the jack 13 can move in a direction parallel to the axis of the jack 12 gradually approaching or moving away from the drawing chamber 111 when the jack 12 is rotated.

It is set that, as shown in fig. 21, the left end of the extension 1211 is the termination point of the track groove 121, and the right end of the extension 1211 is the start point of the track groove 121.

Specifically, as shown in fig. 21, the track groove 121 further includes a first limit portion 1212 and a second limit portion 1213, the first limit portion 1212 communicates with the left end of the extension portion 1211, the second limit portion 1213 communicates with the right end of the extension portion 1211, and the first limit portion 1212 and the second limit portion 1213 each extend in the circumferential direction of the spin basket 12 and are opposite to the extending direction of the extension portion 1211.

In use, the lifting cylinder 12 can be rotated in the arrow direction shown in fig. 21, the guide post 131 of the propping cylinder 13 enters the right end of the extending portion 1211 from the second limiting portion 1213, and the guide post 131 moves to the left end of the extending portion 1211 along the extending portion 1211 under the guiding of the spiral groove 112, and then enters the first limiting portion 1212 to be locked. Similarly, the reverse rotation of the propping cylinder 13 can cause the guide post 131 to enter the second limiting portion 1213 from the first limiting portion 1212 to be blocked.

In an alternative embodiment, the jack 12 is provided with a buckling hole 124, and the buckling hole 124 can be clamped with the position control rear end 2 to realize connection with the position control rear end 2.

In an alternative embodiment, as shown in fig. 22, in order to enable the jack 12 to rotate stably relative to the housing 11, a buckling groove 113 is concavely formed in the inner wall of the housing 11, and the buckling groove 113 is located between the furling cavity 111 and the spiral groove 112 along the axial direction of the housing 11, and as shown in fig. 21, the jack 12 is provided with a protrusion 123 that is in rotation fit with the buckling groove 113.

After the propping cylinder 13 rotates to enter the inner cavity of the shell 11 under the cooperation of the guide post 131 and the spiral groove 112, the shell 11, the spiral lifting cylinder 12 and the propping cylinder 13 can be connected through the clamping connection of the buckling groove 113 and the protrusion 123.

The structure of the position control rear end 2 is specifically described below:

In an alternative embodiment, as shown in fig. 24 to 28, the position control rear end 2 includes a push rod 21, a needle bar 22, and a position control cylinder 23, wherein:

the outer wall of the position control cylinder 23 can be provided with a buckling head 233, and the buckling head 233 is clamped with the buckling hole 124 on the lifting cylinder 12;

one end of the needle placing rod 22 extends into the position control cylinder 23 and is connected with the position control cylinder 23, the other end extends out of the position control cylinder 23, and the inner wall of the needle placing rod 22 is provided with a mounting structure 221;

One end of the push rod 21 extends into the position control cylinder 23 and is sleeved outside the needle placement rod 22, the other end of the push rod 21 extends out of the position control cylinder 23 and is used for pushing the puncture suite 3, and the push rod 21 is in sliding fit with the position control cylinder 23 along the axial direction of the position control cylinder 23.

In use, the needle holder 33 may extend into the needle holder 22 to connect with the mounting structure 221, and since the push rod 21 is slidably engaged with the position control cylinder 23 along the axial direction of the position control cylinder 23, during the process of sliding the push rod 21 toward the distal end of the needle holder, as shown in fig. 29, when the propping flap 132 is in an open condition, the end of the push rod 21 may push the self-closing sleeve 32 located at the proximal end of the puncture needle 31 toward the distal end of the puncture needle 31.

Therefore, the position control rear end 2 in the above embodiment not only can realize the fixation of the needle seat 33, but also can realize the pushing of the self-closing sleeve 32, thereby facilitating the operation of a user.

In an alternative embodiment, as shown in fig. 30, the mounting structure 221 includes a rib buckle protruding from the inner wall of the needle holder 22, and the needle holder 33 is provided with a ring groove 331 that is engaged with the rib buckle.

After the puncture set 3 is used, the forceps can clamp the puncture needle 31 to cancel the clamping of the rib buckle and the ring groove 331, and the puncture set 3 is pulled out.

In an alternative embodiment, as shown in fig. 27, the end of the push rod is concavely provided with a guiding hole 213 for pushing the penetration kit 3.

In an alternative embodiment, as shown in fig. 27 and 28, the position control cylinder 23 is provided with a guide groove 231 along its axial direction, a plurality of position control holes 232 distributed at intervals along the axial direction of the position control cylinder 23 are concavely formed in the inner wall of the position control cylinder 23, one end of the push rod 21 extending into the position control cylinder 23 is provided with a shaft head 211 and a position control column 212 connected with the shaft head 211, the shaft head 211 extends out of the guide groove 231 and is in sliding fit with the guide groove 231 along the extending direction of the guide groove 231, and the position control column 212 is configured to be clamped with any one of the position control holes 232.

In the above embodiment, the limit of the sliding process of the push rod 21 can be realized, and the too large or too small sliding distance of the push rod 21 is avoided.

In an alternative embodiment, as shown in fig. 27, a notch 214 is formed at an end of the push rod 21 extending into the position control cylinder 23, and the notch 214 is located at a side of the spindle head 211, so that when a user presses the spindle head 211, the end of the push rod 21 can deform, and the position control column 212 is convenient to separate from the position control hole 232.

In an alternative embodiment, as shown in fig. 31, the position control rear end 2 includes a ranging cap 24, the ranging cap 24 being connected with the position control barrel 23.

As shown in fig. 31, the end of the ranging cap 24 remote from the positioning cylinder 23 is provided with a plurality of scale points 241, and the plurality of scale points 241 are used for measuring or positioning incision positions so as to help doctors accurately puncture sclera positions.

During surgery, the incision site is typically 3-4mm from the limbus, as shown in figures 32 and 33 below, and the ranging cap 24 provides a 3mm gauge length d ₂ and a 4mm gauge length d ₃. In practice, the plurality of scale points 241 may be configured to include a first scale point 2411, a second scale point 2412, and a third scale point 2413, and after the scale points 241 on the distance measuring cap 24 leave a depression point on the human eye tissue, as shown in fig. 34, a puncture needle may be inserted between the second scale point 2412 and the third scale point 2413.

The following description will specifically explain the use process of the opposite stylus pen, when the second puncture is performed after the first puncture is completed, the rotary lifting cylinder 12 is rotated, so that the guide post 131 moves to the starting point of the track groove 121 along the spiral groove 112, the push rod 21 is pushed down by the pressing shaft head 211, as shown in fig. 35, at this time, the guide hole 213 pushes the proximal self-closing sleeve 32 to move in the distal direction, and after the control column 212 moves into the next control hole 232, the push rod 21 stops moving to complete the unloading of the second self-closing sleeve 32. Subsequently, the rotary lifting cylinder 12 is reversely rotated, so that the guide post 131 moves to the termination point of the track groove 121 along the spiral groove 112, at this time, as shown in fig. 36, the propping valve 132 is matched with the furling cavity 111 to start furling, the end face of the propping valve 132 is contacted with the end face of the silica gel cap at the end of the self-closing sleeve 32, and the self-closing sleeve 32 is completely ejected. When the third puncture is performed, the lifting cylinder 12 is rotated, so that the guide post 131 moves to the starting point of the track groove 121 along the spiral groove 112, and the last self-closing sleeve 32 can be taken out of the warehouse by repeating the above steps. After the self-closing sleeve 32 is used, forceps can be used for clamping the puncture needle 31 to pull out the puncture kit 3.

In an alternative embodiment, as shown in fig. 37 and 38, the needle placement pen further comprises a protective cap 4, and the protective cap 4 is buckled on the holding front end 1 to play a role of protecting the puncture kit 3.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. The puncture outfit is characterized by comprising a needle placement pen and a puncture kit (3), wherein the puncture kit (3) comprises a tip, the tip comprises a side edge surface (311) positioned on the side surface of the tip and an end edge surface (312) positioned on the end surface of the tip, the side edge surface (311) is gradually inclined towards the axis of the tip along the direction approaching to the end edge surface (312), the end edge surface (312) is connected with the side edge surface (311), and the end edge surface (312) is inclined relative to the cross section of the tip;

The puncture kit (3) comprises a puncture needle (31), a self-closing sleeve (32) and a needle seat (33), wherein one end of the puncture needle (31) is the pointed end, and the other end of the puncture needle is connected with the needle seat (33), the self-closing sleeve (32) is configured into a plurality of self-closing sleeves, and the plurality of self-closing sleeves (32) are sequentially sleeved outside the puncture needle (31) along the length direction of the puncture needle (31);

The needle placing pen comprises a holding front end (1) and a position control rear end (2), wherein the holding front end (1) is connected with the position control rear end (2), a mounting channel for mounting the puncture suite (3) is formed between the holding front end (1) and the position control rear end (2), a mounting structure (221) is arranged on the surface, facing the mounting channel, of the position control rear end (2), and the mounting structure (221) is used for being detachably connected with the needle seat (33);

The holding front end (1) comprises a shell (11), a screwing barrel (12) and a propping barrel (13), wherein the screwing barrel (12) is connected with the position control rear end (2), a track groove (121) is formed in the screwing barrel (12), one end of the propping barrel (13) stretches into the screwing barrel (12) and is provided with a guide post (131) which is in sliding fit with the track groove (121), the other end stretches out of the screwing barrel (12) and is provided with a propping valve (132), one end of the shell (11) is rotatably sleeved outside the screwing barrel (12) and the propping valve (132), the other end of the shell is provided with a furling cavity (111), the inner wall of the shell (11) is provided with a spiral groove (112) which is matched with the guide post (131), and the guide post (131) is close to or far away from the furling cavity (111) under the guidance of the spiral groove (112) and the track groove (121).

2. The puncture outfit according to claim 1, wherein two side blade surfaces (311) are provided, the two side blade surfaces (311) are disposed opposite to each other with respect to any one of the longitudinal sections of the tip, and an extension surface of the two side blade surfaces (311) in a direction approaching the end blade surface (312) meets a needle tip point (34).

3. The puncture instrument according to claim 2, characterized in that the perpendicular distance between the plane of the end facet (312) and the needle tip point (34) is 0.05-0.5mm.

4. The penetrator of claim 2, wherein both of the side facets (311) include a first facet (3111), a second facet (3112), and a third facet (3113);

-the first (3111) and third (3113) facets each extend to the end facet (312) and meet at a side of the tip to form a first edge (3114);

The second blade surface (3112) is connected between the first blade surface (3111) and the third blade surface (3113) and extends to the first blade edge (3114) towards a direction close to the end blade surface (312), the second blade surface (3112) and the first blade surface (3111) meet at the side face of the tip to form a second blade edge (3115), and the second blade surface (3112) and the third blade surface (3113) meet at the side face of the tip to form a third blade edge (3116).

5. The penetrator of claim 4, wherein the end facet (312) is at an angle of 120-160 ° to the longitudinal cross-section;

And/or the included angle between the two first edges (3114) of the two side edges (311) is 10-13 °.

6. The penetrator of claim 4, wherein the first one (3111) of the two side facets (311) meet to form a fourth edge (3117), the third one (3113) of the two side facets (311) meet to form a fifth edge (3118), and an angle between the fourth edge (3117) and the fifth edge (3118) is 15-20 °.

7. The penetrator of any one of claims 1-6, wherein the tip is overcoated with a coating of diamond-like carbon.

8. The puncture outfit according to claim 1, wherein the self-closing cannula (32) comprises a cap (321), a cannula mount (322) and a channel tube (323);

The sleeve base (322) is sleeved outside the channel pipe (323);

One end of the channel pipe (323) is connected with the sleeve base (322), the end part of the other end of the channel pipe comprises a transition section (3231) for reducing puncture resistance, and a protruding part (3232) for connecting with the pressure release pipe (5) is protruding from the inner wall of one end of the channel pipe (323) connected with the sleeve base (322);

The cap body (321) is buckled on the sleeve base (322), and the cap body (321) is provided with a notch (3211) for the penetration needle (31) to pass through.