CN110236783B

CN110236783B - Aqueous humor collecting device

Info

Publication number: CN110236783B
Application number: CN201910591368.2A
Authority: CN
Inventors: 璧垫胶; 赵潺
Original assignee: Beijing Huashi Novi Medical Technology Co ltd
Current assignee: Beijing Huashi Novi Medical Technology Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2021-07-06
Anticipated expiration: 2039-07-02
Also published as: CN110236783A

Abstract

The invention discloses a water collection device, comprising: the outer cylinder body is provided with a puncture needle mounting end and a liquid collecting pipe mounting end; the puncture needle is fixedly arranged at the installation end of the puncture needle and is provided with an inner end of the puncture needle positioned in the cylinder cavity of the outer cylinder and an outer end of the puncture needle positioned outside the cylinder cavity of the outer cylinder; the liquid production pipe assembly comprises a liquid production pipe which is inserted into the outer cylinder barrel cavity from the liquid production pipe mounting end and can be axially inserted and pulled to move, and a pipe plug which is arranged in the outer cylinder barrel cavity and is used for sealing the pipe orifice of the liquid production pipe; wherein, the coefficient of static friction between stopcock and the internal perisporium of outer barrel is mu 1, and the coefficient of static friction between stopcock and the liquid production pipe mouth is mu 2, and satisfies: mu 1 is less than mu 2; or the pipe plug is arranged at intervals on the inner peripheral wall of the outer cylinder body. The aqueous humor collecting device can control the aqueous humor drainage speed in the puncture process, can avoid the aqueous humor from being polluted after collection and waste caused by transfer, and has high safety and reliability.

Description

Aqueous humor collecting device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an aqueous humor collecting device.

Background

The anterior chamber puncture of eyeball is a medical technique which punctures the cornea of eyeball through an instrument to make aqueous humor flow out, has important application value in clinical scientific research work of ophthalmology, and is mainly applied to intraocular pressure reduction, aqueous humor collection and other therapeutic anterior chamber drainage.

Currently, the anterior chamber puncture is implemented without uniform special instruments and consumables, and a 1ml syringe needle is mostly used as an anterior chamber puncture needle in actual clinical work. However, in the process of puncturing by using the 1ml syringe needle, the drainage speed of aqueous humor is difficult to control, when the drainage speed is too high, the intraocular pressure can be rapidly reduced, and other complications can be caused even in more serious cases. In addition, because after aqueous humor gathers and finishes, will further shift the aqueous humor in the syringe cavity to the microcentrifuge tube, consequently at this in-process, can cause the waste of aqueous humor to and the existence is because aqueous humor contacts and receives the risk of polluting with external environment in the transfer process, thereby leads to the testing result to have the deviation, and the reliability is relatively poor.

Therefore, there is a need to develop a new collecting device that can solve the problems of poor safety and reliability during the anterior chamber puncture procedure.

Disclosure of Invention

Aiming at the defects or shortcomings in the prior art, the invention provides an aqueous humor collecting device which can control the drainage speed of aqueous humor in the puncture process and can avoid the aqueous humor from being polluted and wasted due to transfer after collection, so that the safety and the reliability are improved.

In order to achieve the above object, the present invention provides an aqueous humor collecting device comprising:

the outer cylinder body is provided with a puncture needle mounting end and a liquid collecting pipe mounting end which are positioned at two axial ends;

the puncture needle is fixedly arranged at the puncture needle mounting end and is provided with a puncture needle inner end positioned in the outer cylinder cavity and a puncture needle outer end positioned outside the outer cylinder cavity;

the liquid production pipe assembly comprises a liquid production pipe which is inserted into the outer cylinder barrel cavity from the liquid production pipe mounting end and can be axially inserted and pulled to move, and a pipe plug which is arranged in the outer cylinder barrel cavity and is used for sealing the pipe orifice of the liquid production pipe;

wherein, the coefficient of static friction between stopcock and the internal perisporium of outer barrel is mu 1, the coefficient of static friction between stopcock and the production pipe mouth is mu 2, and satisfies: mu 1 is less than mu 2;

or the pipe plug is arranged at intervals on the inner peripheral wall of the outer cylinder body.

Optionally, smooth contact is formed between the pipe plug and the inner peripheral wall of the outer cylinder.

Optionally, the aqueous humor collection device further comprises an anti-shaking structure for limiting the radial displacement of the liquid collecting pipe assembly along the outer cylinder cavity.

Optionally, the anti-shaking structure comprises an annular groove and a ring hoop formed on the outer peripheral wall of the liquid production pipe assembly, the annular limiting part is arranged in the annular groove, and the radial outer end of the annular limiting part is abutted to the inner peripheral wall of the outer barrel.

Optionally, the annular limiting member is a rubber ring.

Optionally, the groove side wall of the annular groove is formed with a groove vent hole which is through along the axial direction of the outer cylinder cavity, and the outer cylinder cavity is communicated with the groove vent hole in the cylinder cavity area between the tube plug and the puncture needle mounting end.

Optionally, the aqueous humor collecting device further comprises a needle seat for fixedly mounting the puncture needle, and the inner end of the needle seat is connected with the mounting end of the puncture needle in a quick plugging manner.

Optionally, a threaded insertion or a buckled insertion is formed between the inner end of the needle seat and the mounting end of the puncture needle.

Optionally, the aqueous humor collecting device further comprises a puncture-preventing isolating piece for isolating the inner end of the puncture needle from the tube plug along the axial direction of the cylinder cavity of the outer cylinder body, and the puncture-preventing isolating piece is a detachable piece.

Optionally, the peripheral wall of the outer cylinder body is provided with a spacer insertion groove, the cylinder cavity of the outer cylinder body is communicated with the spacer insertion groove in a cylinder cavity area between the inner end of the puncture needle and the pipe plug, and the puncture-proof spacer is inserted into the cylinder cavity area through the spacer insertion groove.

In the invention, the tube cavity of the liquid collecting tube is in a negative pressure state due to the tube plug arranged on the liquid collecting tube component, when the inner end of the puncture needle punctures the tube plug to drain the aqueous humor to the tube cavity of the liquid collecting tube, the difference between the pressure in the tube cavity and the pressure in the anterior chamber is gradually reduced along with the gradual increase of the liquid amount in the tube cavity, so that the drainage speed of the aqueous humor is gradually reduced, the dangerous condition of sudden drop of intraocular pressure is avoided, and the safety is greatly improved. In addition, owing to injectd the coefficient of static friction between stopcock and the internal perisporium of outer barrel mu 1 be less than the stopcock with the coefficient of static friction between the liquid production pipe mouth of pipe is mu 2, perhaps with the stopcock interval in the setting of external barrel internal perisporium, can guarantee when extracting the liquid production pipe subassembly from outer barrel chamber, the stopcock blocks up the liquid production pipe mouth of pipe tightly all the time, avoid aqueous humor and external environment in the lumen to contact, guarantee the purity of the aqueous humor of gathering, and can avoid owing to shift the waste that the aqueous humor caused, thereby improve the reliability of follow-up detection.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of an aqueous humor collection device according to an embodiment of the present invention;

FIG. 2 is a front view of the aqueous humor collection device of FIG. 1;

FIG. 3 is a front cross-sectional view of the aqueous humor collection device of FIG. 2 shown without the puncture needle piercing the plug;

FIG. 4 is a front cross-sectional view of the aqueous humor collection device of FIG. 3 with an anti-puncture barrier;

FIG. 5 is a cross-sectional view of the aqueous humor collection device of FIG. 1;

FIG. 6 is a schematic structural view of the aqueous humor collecting device of FIG. 3 with a puncture needle having water outlet holes in the peripheral wall;

FIG. 7 is a schematic view of the tube plug of the aqueous humor collecting device of FIG. 3 with a tube plug exhaust passage having an open peripheral wall and a semicircular shape;

FIG. 8 is a schematic view of the pipe plug of the aqueous humor collecting device shown in FIG. 3, which is provided with a pipe plug exhaust passage having an open peripheral wall and a semi-rectangular shape;

FIG. 9 is a schematic view of the pipe plug of the aqueous humor collecting device shown in FIG. 3, which is provided with a circular pipe plug exhaust passage having a closed peripheral wall;

FIG. 10 is a schematic view of the pipe plug of the aqueous humor collecting device shown in FIG. 3, which is provided with a pipe plug exhaust passage having a closed peripheral wall and an arc shape;

FIG. 11 is a schematic structural view of the aqueous humor collecting device of FIG. 3 with the liquid collecting tube and the support tube holder connected by a snap fit;

fig. 12 is a schematic structural view of a liquid collecting tube of the aqueous humor collecting device according to an embodiment of the present invention, in which a plurality of dot-shaped limiting protrusions are integrally formed;

fig. 13 is a schematic structural view of a liquid collecting tube of the aqueous humor collecting device according to an embodiment of the present invention, in which a corrugated limiting protrusion is integrally formed;

FIG. 14 is a schematic structural view of the aqueous humor collecting device according to the embodiment of the present invention, wherein a tube assembly is sleeved outside the fluid collecting tube, and the limiting protrusions are protruded;

FIG. 15 is a schematic structural view of the aqueous humor collecting device according to an embodiment of the present invention, in which a tube kit is sleeved outside the fluid collecting tube, and the limiting protrusions are corrugated;

FIG. 16 is a schematic structural view of the aqueous humor collecting device according to the embodiment of the present invention, wherein a tube sleeve is sleeved outside the fluid collecting tube, and the limiting protrusions are in the shape of teeth;

FIG. 17 is a schematic structural view of a supporting pipe frame of the aqueous humor collecting device according to an embodiment of the present invention, in which a plurality of protruding point-like limiting protrusions are integrally formed;

FIG. 18 is a schematic structural view of an aqueous humor collecting device according to an embodiment of the present invention, in which a corrugated position-limiting protrusion is integrally formed on a supporting pipe frame;

FIG. 19 is a schematic structural view of a supporting pipe frame of the aqueous humor collecting device according to the embodiment of the present invention, in which a helical tooth-shaped limiting protrusion is integrally formed;

FIG. 20 is a schematic structural view of the aqueous humor collecting device according to an embodiment of the present invention, wherein a tube set is sleeved outside the support tube frame, and the limiting protrusions are protruded;

FIG. 21 is a schematic structural view of the aqueous humor collecting device according to an embodiment of the present invention, in which a tube kit is sleeved outside the support tube holder and the limiting protrusions are corrugated;

fig. 22 is a schematic structural view of the aqueous humor collecting device according to the embodiment of the present invention, in which the tube holder is sleeved with the tube sleeve, and the limiting protrusions are in the form of teeth.

Description of reference numerals:

100 aqueous humor collecting device

1 outer cylinder 2 puncture needle

3 liquid extraction pipe assembly 4 needle seat

5 anti-puncture spacing piece 6 spacing projection

7 needle cap 8 soft sleeve

11 spacer insertion groove 21 peripheral wall water outlet hole

22 axial apopore 31 liquid collecting tube

32 support pipe rack 33 pipe plug

34 pipe external member 35 ring groove

36 groove vent hole 37 ring-shaped limiting piece

311 liquid production pipe clamping groove 321 pipe rack fastener

322 pipe support buckle button 331 pipe plug exhaust passage

332 pierce through the blind via

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

The aqueous humor collecting apparatus according to the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 to 16, an exemplary embodiment of the present invention provides an aqueous humor collecting device 100, which includes an outer cylinder 1, a puncture needle 2, and a fluid collecting tube assembly 3. The outer cylinder body 1 is provided with a puncture needle mounting end and a liquid collecting pipe mounting end which are positioned at two axial ends. The puncture needle 2 is fixedly arranged at the puncture needle mounting end and is provided with an inner end of the puncture needle positioned in the outer cylinder cavity and an outer end of the puncture needle positioned outside the outer cylinder cavity. The liquid production pipe assembly 3 comprises a liquid production pipe 31 which is inserted into the outer cylinder barrel cavity from the liquid production pipe mounting end and can be axially inserted and pulled and moved, and a pipe plug 33 which is arranged in the outer cylinder barrel cavity and used for sealing the opening of the liquid production pipe. Wherein, the coefficient of static friction between stopcock 33 and the internal perisporium of outer barrel is mu 1, and the coefficient of static friction between stopcock 33 and the liquid production pipe mouth is mu 2, and satisfies: mu 1 < mu 2. Alternatively, the plug 33 may be spaced from the inner peripheral wall of the outer cylinder to ensure that the plug 33 and the inner peripheral wall of the outer cylinder do not contact each other.

When the aqueous humor collecting device 100 according to the exemplary embodiment of the present invention is used for anterior chamber puncture, the fluid collecting tube assembly 3 can be pushed toward the inner end of the puncture needle, so that the inner end of the puncture needle punctures the flexible sleeve 8 and the plug 33 and then is inserted into the lumen of the fluid collecting tube, so as to drain the aqueous humor in the anterior chamber to the lumen of the fluid collecting tube through the outer end of the puncture needle and the inner end of the puncture needle. In this collection process, because the liquid collection pipe mouth of pipe is sealed by stopcock 33, the liquid collection pipe lumen is in negative pressure state all the time, but along with the liquid volume in the lumen increases gradually, the difference between lumen internal pressure and the anterior chamber internal pressure reduces gradually, consequently can make the drainage speed of aqueous humor reduce gradually to avoid appearing the dangerous condition of intraocular pressure shock, improve the security of puncture drainage greatly.

Further, after the aqueous humor is gathered and is finished, can wholly extract liquid sampling pipe assembly 3 from outer barrel chamber, then directly place liquid sampling pipe 31 in specific detecting instrument and carry out specific project and detect, compare with prior art, need not make further transfer to the aqueous humor after gathering, consequently can avoid aqueous humor in the liquid sampling pipe lumen and external environment to contact, guarantee the purity of the aqueous humor gathered, thereby improve the accuracy and the reliability of follow-up detection, and can avoid owing to shift the waste that the aqueous humor caused.

In addition, because the static friction coefficient mu 1 between the pipe plug 33 and the inner peripheral wall of the outer cylinder body is limited to be less than the static friction coefficient mu 2 between the pipe plug 33 and the nozzle of the liquid production pipe, or the pipe plug 33 is arranged at intervals on the inner peripheral wall of the outer cylinder body, when the liquid production pipe assembly 3 is integrally pulled out from the cylinder cavity of the outer cylinder body, the pipe plug 33 can always tightly block the nozzle of the liquid production pipe, and the purity of the collected aqueous humor can be more reliably ensured.

In some embodiments, when the pipe plug 33 and the inner peripheral wall of the outer cylinder are in contact with each other, in order to better avoid the pipe plug 33 from falling off, the pipe plug 33 and the inner peripheral wall of the outer cylinder are preferably arranged to be in contact with each other through a smooth surface. For example, the radially outer end surface of the plug 33 or the outer cylinder inner peripheral wall surface may be set to a smooth surface, or both the radially outer end surface of the plug 33 and the outer cylinder inner peripheral wall surface may be set to a smooth surface.

In some embodiments, the aqueous humor collection device 100 includes an anti-wobble structure for limiting radial displacement of the fluid collection tube assembly 3 along the outer cylinder bore. Under this structure, can guarantee that liquid sampling pipe assembly 3 only moves along axial displacement and radial rocking can not appear at the plug removal in-process, can not only guarantee puncture needle inner puncture stopcock 33 accurately in order to insert to the liquid sampling pipe intracavity in the puncture process, can also guarantee to extract liquid sampling pipe assembly 3 steadily after aqueous humor gathers finish to avoid the aqueous humor leakage in the liquid sampling pipe intracavity, thereby further improve the accuracy and the reliability of follow-up detection.

As shown in fig. 3 and 4, the shaking prevention structure may include a ring-shaped stopper 37 provided with a ring-shaped groove 35 formed on the outer circumferential wall of the production pipe assembly 3 and a ring-shaped groove 35 of a hoop, and a radially outer end of the ring-shaped stopper 37 abuts against the inner circumferential wall of the outer cylinder. It should be noted that, the annular limiting member 37 can not only prevent the radial shaking of the liquid collection tube assembly 3 to make the inner end of the puncture needle puncture the plug 33 more accurately and prevent deviation in the puncturing process, but also properly increase the insertion and extraction resistance of the liquid collection tube assembly 3 to make the operator feel a certain pushing hand feeling, thereby avoiding the situation that the puncture is not accurate due to too fast pushing speed when the liquid collection tube assembly 3 is pushed towards the inner end of the puncture needle, and further avoiding the inner end of the puncture needle from being inserted into the liquid collection tube cavity, i.e. effectively improving the stability and reliability of the puncturing and drainage process. In addition, the liquid collecting pipe assembly 3 can be prevented from being separated from the outer cylinder body and falling off when the aqueous humor collecting device 100 is taken, so that the reliability of the product is improved. Preferably, a plurality of sets of annular grooves 35 and corresponding annular stoppers 37 may be provided for better results.

In order to reduce the production difficulty and the production cost, the annular limiting part 37 can be preferably set to be a rubber ring or other elastic rings which are easy to obtain and cheap, and the elastic contact is formed between the annular limiting part 37 made of the elastic material and the inner peripheral wall of the outer cylinder body, so that the inner peripheral wall of the outer cylinder body can be prevented from being abraded due to excessive friction.

Further, a groove vent hole 36 which is through along the axial direction of the outer cylinder barrel cavity can be formed on the groove side wall of the annular groove 35, so that the barrel cavity area of the outer cylinder barrel cavity between the pipe plug 33 and the puncture needle mounting end can be communicated with the atmospheric environment through the groove vent hole 36, thereby preventing the smooth plugging and unplugging of the liquid sampling pipe assembly 3 from being influenced by the formation of an air plug in the outer cylinder barrel cavity, and further improving the use reliability of the aqueous humor collecting device 100.

As shown in fig. 12 to 16, the shaking prevention structure may further include a limiting protrusion 6 protruding from the outer circumferential wall of the liquid production pipe assembly 3 or from the inner circumferential wall of the outer cylinder, and both radial ends of the limiting protrusion 6 are respectively connected to the outer circumferential wall of the liquid production pipe assembly 3 and the inner circumferential wall of the outer cylinder, so as to prevent the liquid production pipe assembly 3 from shaking radially.

When the limiting protrusion 6 is arranged on the peripheral wall of the liquid production pipe assembly 3, the limiting protrusion 6 can be integrally formed on the peripheral wall of the liquid production pipe 31. Or, a pipe kit 34 sleeved on the outer peripheral wall of the liquid production pipe 31 can be arranged in the liquid production pipe assembly 3, and the limiting protrusion 6 is arranged on the outer peripheral wall of the pipe kit 34, because the pipe kit 34 is a detachable piece, the pipe kit can be reused, and the difficulty in forming the limiting protrusion 6 on the pipe kit 34 is relatively smaller, which is more beneficial to reducing the production cost.

Further, the tube set 34 may be provided as an elastic tube set to prevent the liquid production tube 31 from being broken due to rigid contact when subjected to a radial limiting action, thereby reducing the risk of aqueous humor leakage.

In some embodiments, the anti-shaking structure can include a plurality of spacing protrusions 6 arranged at intervals in sequence along the circumferential direction, and can ensure that the liquid collecting pipe 31 and the outer cylinder body cavity are coaxially arranged, so that the liquid collecting pipe 31 can be ensured to be smoothly inserted and pulled along the axial direction. In addition, because the exhaust gaps are formed among the plurality of spacing bulges 6 which are mutually spaced, the cylinder cavity area of the outer cylinder body between the puncture needle mounting end and the pipe plug 33 can be communicated with the atmospheric environment through the exhaust gaps, thereby avoiding the influence on the smooth plugging and unplugging of the liquid production pipe assembly 3 caused by the formation of the air plug in the cylinder cavity of the outer cylinder body. For example, referring to fig. 12 and 14, a plurality of the limiting protrusions 6 arranged at intervals in the circumferential direction may be provided in a convex shape.

Alternatively, in some embodiments, the limiting protrusion 6 may also be formed to extend continuously in the circumferential direction. When the limiting protrusion 6 is formed on the inner circumferential wall of the outer cylinder, an air discharge gap is preferably formed between the limiting protrusion 6 and the outer circumferential wall of the liquid production pipe assembly 3 to avoid air embolism. When the limit projection 6 is formed on the outer circumferential wall of the production pipe assembly 3, an air discharge gap is preferably formed between the limit projection 6 and the inner circumferential wall of the outer cylinder. For example, referring to fig. 13, 15 and 16, the circumferentially continuously extending stopper projection 6 may be provided in a corrugated shape or a helical tooth shape.

For further improving the plug stability of liquid production pipe subassembly 3, no matter spacing arch 6 is along the tube length direction interval setting in proper order of liquid production pipe subassembly 3, or is along the continuous extension shaping of tube length direction, all preferably sets up spacing arch 6 along the total span of tube length direction for not less than the half of liquid production pipe length. In other words, when the number of the arrangement of the restricting projections 6 in the pipe length direction is sufficiently large, the formation of the fulcrum on the outer circumferential wall of the production pipe assembly 3 can be avoided, thereby more reliably preventing the production pipe assembly 3 from shaking in the radial direction.

In some embodiments the production tubing assembly 3 further comprises a support tube rack 32 for fixedly mounting the production tubing 31. In this structure, the shaking prevention structure can be provided between the outer circumferential wall of the support pipe frame 32 and the inner circumferential wall of the outer cylinder, as shown in fig. 17 to 22, for example. This support pipe support 32 can improve the stability of production pipe subassembly 3 better and can reduce the risk that production pipe subassembly 3 breaks because of receiving the collision or pressing the lapse.

Because after aqueous humor gathers, need take out the liquid production pipe alone, consequently the connected mode between liquid production pipe 31 and the support pipe support 32 will satisfy stability and quick assembly disassembly's requirement simultaneously. Preferably, the production pipe 31 and the support pipe frame 32 can be fixed by screwing or snapping connection.

For example, referring to fig. 11, the liquid production pipe 31 is connected with the support pipe frame 32 by a snap fit, and when the liquid production pipe 31 needs to be inserted into the support pipe frame 32, the liquid production pipe 31 is pushed to the right until the pipe frame snap fit 321 is snapped into the liquid production pipe snap fit groove 311, so that the liquid production pipe 31 and the support pipe frame 32 can be mutually locked by the snap fit. When the production pipe 31 needs to be taken out, the pipe support buckle button 322 can be pressed, so that the pipe support buckle 321 is lifted to be separated from the production pipe clamping groove 311, and the production pipe 31 can be quickly taken out from the support pipe support 32.

In some embodiments, aqueous humor collection device 100 further includes a needle hub 4 for fixedly mounting the puncture needle 2. Wherein, the outer end of the puncture needle extends out from the outer end of the needle seat, the inner end of the puncture needle extends out from the inner end of the needle seat, and the inner end of the needle seat and the installation end of the puncture needle form quick plug connection, thereby being beneficial to reducing the installation difficulty and improving the assembly efficiency. For example, the inner end of the needle seat and the mounting end of the puncture needle can be in threaded connection or buckling connection.

In some embodiments, aqueous humor collection device 100 further comprises a puncture-proof barrier 5, wherein puncture-proof barrier 5 is used to isolate the inner end of the puncture needle from plug 33 in the axial direction of the outer barrel lumen to prevent the inner end of the puncture needle from puncturing plug 33 in the event that the anterior chamber puncture is not performed using aqueous humor collection device 100, i.e., to effectively prevent device failure before nonuse. The puncture-preventing barrier 5 prevents the aqueous humor collecting device 100 from being disabled, for example, during transportation or in the case of erroneous operation by medical staff. Of course, in order not to affect the normal puncture drainage of the aqueous humor collecting device 100, the puncture preventing spacer 5 is provided as a detachable member, and the puncture preventing spacer 5 can be detached before the puncture is performed.

For example, referring to fig. 4, a spacer cartridge slot 11 may be provided in the circumferential wall of the outer barrel 1 such that the spacer cartridge slot 11 and the outer barrel bore communicate with each other in the bore area between the inner end of the puncture needle and the plug 33, and the puncture-proof spacer 5 may be inserted into the bore area through the spacer cartridge slot 11 and interposed between the inner end of the puncture needle and the plug 33, thereby isolating the inner end of the puncture needle and the plug 33 from each other. When the anti-puncture isolating piece 5 needs to be removed, the anti-puncture isolating piece can be quickly pulled out from the isolating piece inserting groove 11, and the operation is quite convenient.

In some embodiments, as shown in fig. 7 to 10, in order to better avoid the formation of air lock in the outer cylinder cavity and thus the influence of the smooth insertion and extraction of the liquid production tube assembly 3, a plug air vent channel 331 arranged along the extending direction of the outer cylinder cavity may be formed at the radial outer edge portion of the plug 33, and the cavity region of the outer cylinder cavity between the plug 33 and the puncture needle mounting end may be communicated with the atmosphere through the plug air vent channel 331 and the peripheral wall air vent gap between the liquid production tube 31 and the inner peripheral wall of the outer cylinder. In other words, the outer cylinder chamber communicates in sequence with the chamber region between the plunger 33 and the puncture needle mounting end, the plunger vent passage 331 and the circumferential wall vent gap, and the atmosphere.

In order to improve the ventilation effect and make the structure of the pipe plug 33 more uniform and reasonable, a plurality of pipe plug exhaust channels 331 are arranged along the axial extension of the cylinder cavity of the outer cylinder body and are sequentially arranged at intervals along the circumferential direction of the pipe plug 33.

The specific shape of the plug vent passage 331 may be determined as needed, and for example, referring to fig. 7 and 8, a plug vent groove provided with a groove opening facing radially outward may be formed as the plug vent passage 331 on the outer peripheral wall of the plug 33. In other words, the plug exhaust passage 331 may be provided as an exhaust passage whose peripheral wall is open. Alternatively, referring to fig. 9 and 10, the passage peripheral wall of the plug exhaust passage 331 may be provided as a closed peripheral wall, that is, the plug exhaust passage 331 may be provided as an exhaust passage whose peripheral wall is closed. In addition, the cross section of the plug exhaust path 331 may be formed in various shapes such as a semicircle, a square, or an arc.

In some embodiments, the plug 33 includes a plug central portion for sealing the opening of the production pipe and a plug outer ring portion located radially outside the plug central portion and provided with a plug exhaust channel 331, and in order to ensure the inside and outside ventilation, the plug outer ring portion may be at least partially configured as a loose ventilation structure, but it is still necessary to ensure the sealing performance of the plug central portion.

In order to ensure that the inner end of the puncture needle does not shake when puncturing the pipe plug 33 to affect the puncturing accuracy, a puncturing guide blind hole 332 for guiding the inner end of the puncture needle to penetrate through can be arranged at the end part of the pipe plug 33, and the outer contour shape of the inner end of the puncture needle is matched with the shape of the puncturing guide blind hole 332. For example, referring to FIG. 3, the needle inner end and blind puncture hole 332 can be configured in matching elongated conical shapes.

It should be noted that during the process of the inner end of the puncture needle puncturing the plug 33, the axial water outlet hole 22 at the inner end of the puncture needle may be blocked by the plug material, so that the drainage is blocked and the device cannot work normally. Therefore, in order to avoid the situation of flow interruption, the peripheral wall water outlet hole 21 communicated with the needle cavity of the puncture needle 2 can be arranged on the peripheral wall at the inner end of the puncture needle, and under the structure, even if the axial water outlet hole 22 is blocked by a pipe plug material, aqueous humor can also flow out of the pipe cavity of the liquid collecting pipe through the peripheral wall water outlet hole 21, so that the working reliability of the device is ensured.

In addition, the axial distance between the peripheral wall outlet hole 21 and the axial outlet hole 22 should not be too large, otherwise, after the axial outlet hole 22 is inserted into the tube cavity of the liquid production tube, the peripheral wall outlet hole 21 is still located in the plug 33 and is blocked, so that the peripheral wall outlet hole 21 is not effective. For this reason, the axial distance between the hole center of the circumferential wall outlet hole 21 and the hole center of the axial outlet hole 22 may preferably be set to be not more than 3mm, so as to ensure that the circumferential wall outlet hole 21 can be located in the production pipe cavity without being blocked after the axial outlet hole 22 is inserted into the production pipe cavity.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An aqueous humor collecting device (100) comprising:

the outer cylinder body (1) is provided with a puncture needle mounting end and a liquid collecting pipe mounting end which are positioned at two axial ends;

the puncture needle (2) is fixedly arranged at the puncture needle mounting end and is provided with a puncture needle inner end positioned in the outer cylinder cavity and a puncture needle outer end positioned outside the outer cylinder cavity;

the liquid production pipe assembly (3) comprises a liquid production pipe (31) which is inserted into the outer cylinder barrel cavity from the liquid production pipe mounting end and can be axially inserted and pulled out and moved, and a pipe plug (33) which is arranged in the outer cylinder barrel cavity and is used for sealing the pipe orifice of the liquid production pipe;

wherein, the static friction coefficient between the pipe plug (33) and the inner peripheral wall of the outer cylinder body is mu 1, the static friction coefficient between the pipe plug (33) and the nozzle of the liquid production pipe is mu 2, and the static friction coefficients meet the following conditions: mu 1 is less than mu 2;

or the pipe plug (33) is arranged at intervals on the inner peripheral wall of the outer cylinder body;

the aqueous humor collecting device (100) further comprises a puncture-proof isolating piece (5) which is used for isolating the inner end of the puncture needle from the pipe plug (33) along the axial direction of the cylinder cavity of the outer cylinder body, and the puncture-proof isolating piece (5) is a detachable piece;

the peripheral wall of the outer cylinder body is provided with a spacer inserting groove, the spacer inserting groove is communicated with the cylinder cavity area of the outer cylinder body between the inner end of the puncture needle and the pipe plug, and the puncture-proof spacer can be inserted into the cylinder cavity area through the spacer inserting groove and is arranged between the inner end of the puncture needle and the pipe plug, so that the inner end of the puncture needle and the pipe plug are mutually isolated;

the puncture needle comprises an axial water outlet hole and a peripheral wall water outlet hole communicated with the needle cavity, and the axial distance between the hole center of the peripheral wall water outlet hole and the hole center of the axial water outlet hole is not more than 3 mm;

the liquid production pipe assembly further comprises a support pipe frame for fixedly mounting the liquid production pipe, and the liquid production pipe is connected with the support pipe frame through a buckle;

the aqueous humor collecting device (100) further comprises an anti-shaking structure for limiting the radial displacement of the liquid collecting pipe assembly (3) along the cylinder cavity of the outer cylinder body;

the anti-shaking structure comprises a plurality of groups of annular grooves (35) formed in the outer peripheral wall of the liquid production pipe assembly (3) and annular limiting pieces (37) arranged by hooping the annular grooves (35), and the radial outer ends of the annular limiting pieces (37) are abutted to the inner peripheral wall of the outer cylinder body;

and a groove vent hole (36) which is communicated along the axial direction of the outer cylinder cavity is formed on the groove side wall of the annular groove (35), and the cylinder cavity area of the outer cylinder cavity between the pipe plug (33) and the puncture needle mounting end is communicated with the groove vent hole (36).

2. The aqueous humor collection device according to claim 1, wherein the plug (33) forms a smooth contact with the inner circumferential wall of the outer cylinder.

3. An aqueous humor acquisition device according to claim 1, characterized in that the annular stop (37) is a rubber band.

4. The aqueous humor collecting device according to claim 1, wherein the aqueous humor collecting device (100) further comprises a needle holder (4) for fixedly mounting the puncture needle (2), and a quick plug connection is formed between the inner end of the needle holder (4) and the mounting end of the puncture needle.

5. The aqueous humor collecting device of claim 4, wherein a threaded or snap fit is formed between the inner end of the needle hub and the mounting end of the puncture needle.