阅读说明：本技术 软泪道探针 (Soft lacrimal probe ) 是由 裘项旭 其他发明人请求不公开姓名 于 2020-08-18 设计创作，主要内容包括：本发明公开了软泪道探针,包括探针头端、探针针体和探针握持部,三者依序一体固接,所述探针头端为圆钝面；所述探针针体具有一个延伸方向,所述探针针体可向远离其延伸方向的侧部弯曲；且所述探针针体的内部可设有沿其延伸方向布置的抗弯调节结构,所述抗弯调节结构能够调节所述探针针体的弯曲难易度；探针针体的抗弯刚度EI在8N·mm<Sup>2</Sup>~600N·mm<Sup>2</Sup>。通过上述方式,本发明软泪道探针,能顺着泪道管腔走行方向改变探通方向,往薄弱的方向或生理泪道方向转向,不易产生医源性假道；而短距离内又有一定的刚性,可以探通一定程度的狭窄和阻塞；同时能为存在解剖差异(即使无泪道阻塞,硬泪道探针也不能无阻力探通泪道的情况)的发生率提供一个研究方法。(The invention discloses a soft lacrimal probe, which comprises a probe head end, a probe needle body and a probe holding part, wherein the probe head end, the probe needle body and the probe holding part are sequentially and integrally fixedly connected, and the probe head end is a round blunt surface; the probe needle body is provided with an extending direction, and the probe needle body can bend towards the side part far away from the extending direction; the probe needle body can be internally provided with an anti-bending adjusting structure arranged along the extension direction of the probe needle body, and the anti-bending adjusting structure can adjust the bending difficulty of the probe needle body; the bending rigidity EI of the probe body is 8 N.mm 2 ~600N·mm 2 . Through the mode, the soft lacrimal passage probe can change the probing direction along the walking direction of the lacrimal passage lumen and turn to the weak direction or the physiological lacrimal passage direction, and is not easy to generate iatrogenic false passages; the short distance has certain rigidity, so that stenosis and blockage of a certain degree can be detected; meanwhile, a research method can be provided for the occurrence rate of anatomical difference (even if no lacrimal passage blockage exists, the hard lacrimal passage probe can not probe the lacrimal passage without resistance).)

1. The soft lacrimal passage probe comprises a probe needle body and a probe holding part, wherein the probe needle body is provided with an extension direction, the probe needle body is provided with a first end and a second end along the extension direction, and the first end is fixedly connected with the probe holding part; wherein the soft lacrimal probe further comprises: a probe tip end;

the probe head end is fixedly connected with the second end; and the probe head end is a round blunt surface at one side end far away from the second end;

the probe needle body can be bent towards the side part far away from the extending direction of the probe needle body; the probe needle body can be internally provided with an anti-bending adjusting structure arranged along the extension direction of the probe needle body, and the anti-bending adjusting structure can adjust the bending difficulty of the probe needle body;

the bending rigidity EI of the probe body is 8 N.mm²~600N·mm²。

2. The soft lacrimal probe of claim 1, wherein: the probe body is in a cylindrical rod shape or a cylindrical tube shape; the probe head end is a hemisphere, and the maximum outer diameter of the hemisphere at the probe head end is consistent with the diameter of the probe body; and the edge of the probe head end and the second end of the probe body are in smooth transition.

3. The soft lacrimal probe of claim 1, wherein: the probe needle body is made of medical plastics or medical plastics and medical metal mixed.

4. The soft lacrimal probe of claim 1, wherein: the bending-resistant adjusting structure is a linear metal wire and/or a spiral metal wire; the bending-resistant adjusting structure is arranged in the probe needle body and arranged along the extending direction of the probe needle body.

5. The soft lacrimal probe of claim 1, wherein: one side of the probe holding part, which is far away from the probe head end, is provided with a luer inner conical interface, and a luer inner conical interface cavity channel is continuously communicated with a hollow cavity channel in the cylindrical tubular probe needle body in one direction;

an opening is arranged on the side part close to the second end and is continuously communicated with the cavity channel, a syringe is connected to the luer inner conical interface and is injected with water, then the water flows out of the opening through the hollow cavity channel in the probe needle body, and the hollow cavity channel in the probe needle body forms a liquid flow channel during flushing.

6. The irrigated lachrymal probe of claim 5, wherein: the probe body is an extension spring or the extension spring and medical plastic jointly form the probe body tube wall, namely the cylindrical tubular probe body.

7. The irrigated lachrymal probe of claim 5, wherein: the probe also comprises a needle core, wherein the needle core is made of metal materials and can enhance the bending rigidity of the probe body;

a needle core can be smoothly placed in a hollow cavity in the cylindrical tubular probe needle body and the luer inner circular cone interface;

the needle core can be displaced or completely removed from the hollow channel and the luer inner conical interface in the probe needle body.

8. The irrigated lachrymal probe of claim 7, wherein: one side of the needle core, which is far away from the probe head end, is sleeved with a luer outer conical joint; the luer outer conical joint is inserted into the luer inner conical interface at the tail end of the probe holding part for fixing;

the tail part of the needle core is fixedly connected with an adjusting structure;

the adjusting structure is an adjusting bolt; a hollow internal thread is arranged in the luer outer conical joint and matched with an adjusting bolt in a screwing mode, and the adjusting bolt is rotated to adjust the position of the head end of the needle core at the hollow cavity channel in the probe body.

9. The soft lacrimal probe of claim 1, wherein: the pressure sensor with pressure display screen is arranged at the tail end of the probe holding part, and if the lacrimal probe has a stylet, the pressure sensor is arranged at the tail end of the stylet.

10. The soft lacrimal probe of claim 1, wherein: and each centimeter position of the probe body is provided with a scale mark.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a soft lacrimal passage probe.

Background

The current commonly used methods for detecting and treating lacrimal duct obstruction include: lacrimal passage irrigation, lacrimal passage probing, and the like.

Among these, some accidents are commonly encountered for lacrimal probes: as in clinical work, we have found anatomical differences in the external lachrymal-nasal anastomosis of the medial canthal skin incision (without severing the medial canthal ligament) (hard lacrimal probes do not probe the lacrimal passage without resistance even without lacrimal obstruction): when the lacrimal probe for punctum entry is extracted from the incised lacrimal sac, the forceps are used to pull the hard lacrimal probe extracted from the incised lacrimal sac forward (in front of the patient), and the hard lacrimal probe still cannot be extracted into the bony nasolacrimal duct at the front lower end.

We found that the lacrimal duct catheterization in the case of lacrimal duct catheterization failure is outside the lacrimal sac when the dacryocystorhinostomy is performed, and that the lacrimal duct catheterization is behind the lacrimal duct in many cases.

In young patients without tears before trauma, the tear duct probe often touches the bone to rub in the back of the nasolacrimal duct when the lacrimal duct is broken and anastomosed to the duct.

Therefore, some operating physicians in hospitals have a slightly bent anterior segment of the lacrimal probe as a guide for incising the lacrimal sac in endoscopic nasolacrimal sac-rhinoanastomosis. If a normal straight is used, it may be difficult to give a good indication of the cutting of the lacrimal sac-too far back, the tip position is not visible, and even if it is visible, it is easy to guide the health care provider to cut the lacrimal sac at a location posterior to the lacrimal sac, rather than at the middle of the lacrimal sac or anterior to the lacrimal sac as desired by the health care provider.

Combining the above, we consider: the two points of frontal bone and inner canthus ligament limit the lacrimal probe, so that the lower end of the probe can not move forward after passing through the inner canthus ligament; but often the lacrimal duct has anatomical differences: the superior orifice of the nasolacrimal duct and the nasolacrimal duct are positioned in front of the connecting line of the two points, so the result of the forceful probing is only to probe the lacrimal duct probe into the tissues behind the lacrimal duct to generate iatrogenic false canals. Especially for the patients with neonatal dacryocystitis, the brain development may be earlier than the mid-facial development, which causes the possibility of difficult entry into the nasolacrimal duct, so that the possibility of false tract injury during treatment is higher, and the potential safety hazard exists.

Disclosure of Invention

The invention mainly solves the technical problem of providing a soft lacrimal passage probe, so that excessive force (pressure of a contact surface) cannot be applied during probing, the probe can be bent and deformed after the excessive force, thereby preventing false passage, and the soft lacrimal passage probe can descend along a narrow lachrymal passage due to certain flexibility, thereby solving the problem that the current hard lacrimal passage probe is easy to cause operation failure due to iatrogenic false passage in patients with partial anatomical difference. Meanwhile, the clinical analysis method is carried out for the incidence of anatomical difference of iatrogenic false tracts of the hard lacrimal probe: a routine soft lacrimal probe for detecting reflux disease of a lacrimal passage flushing part is selected to detect and record the detection pressure (shown by a baroreceptor), and then the conventional hard lacrimal probe with the baroreceptor is changed into the conventional hard lacrimal probe for detecting, and if the resistance is larger than that of the soft lacrimal probe or the contact with the bone is rubbed, the anatomical difference condition is considered.

In order to solve the technical problems, the invention adopts the technical scheme that:

the soft lacrimal passage probe comprises a probe needle body and a probe holding part, wherein the probe needle body is provided with an extension direction, the probe needle body is provided with a first end and a second end along the extension direction, and the first end is fixedly connected with the probe holding part; wherein the soft lacrimal probe further comprises: a probe tip end;

the probe head end is fixedly connected with the second end; and the probe head end is a round blunt surface at one side end far away from the second end;

the probe needle body can be bent towards the side part far away from the extending direction of the probe needle body; the probe needle body can be internally provided with an anti-bending adjusting structure arranged along the extension direction of the probe needle body, and the anti-bending adjusting structure can adjust the bending difficulty of the probe needle body;

the bending rigidity EI of the probe body is 8 N.mm²~600N·mm²。

Further, the probe needle body is in a cylindrical rod shape or a cylindrical tube shape; the probe head end is a hemisphere, and the maximum outer diameter of the hemisphere at the probe head end is consistent with the diameter of the probe body; and the edge of the probe head end and the second end of the probe body are in smooth transition.

Furthermore, the probe needle body is made of medical plastics or a mixture of medical plastics and medical metal.

Further, the bending-resistance adjustment structure is a linear wire and/or a helical wire; the bending-resistant adjusting structure is arranged in the probe needle body and is arranged along the extending direction of the probe needle body; the linear wire may be positioned at the center of the probe body or near the outer surface, and the spiral wire may be positioned at the probe body near the outer surface.

Further, a pressure sensor with a pressure display screen is arranged at the tail end of the probe holding part, and the pressure display screen is located outside the probe holding part.

Furthermore, one side of the probe holding part, which is far away from the probe head end, is provided with a luer inner conical interface, and a luer inner conical interface cavity channel is continuously communicated with a hollow cavity channel in the cylindrical tubular probe needle body in one direction;

an opening is arranged on the side part close to the second end, the opening is continuously communicated with the cavity channel, a syringe is connected to the luer inner conical interface, water is injected into the luer inner conical interface, the luer inner conical interface flows out of the opening through the hollow cavity channel in the probe needle body, and the hollow cavity channel in the probe needle body forms a liquid flow channel during flushing;

the soft lacrimal probe is a flushing type soft lacrimal probe.

Furthermore, the probe body is an extension spring or the extension spring and medical plastic jointly form the probe body tube wall, namely the cylindrical tubular probe body.

Furthermore, the probe also comprises a needle core, wherein the needle core is made of metal materials and can enhance the bending rigidity of the probe body;

a needle core can be smoothly placed in a hollow cavity in the cylindrical tubular probe needle body and the luer inner circular cone interface;

the needle core can be displaced or completely removed from the hollow channel and the luer inner conical interface in the probe needle body.

Furthermore, one side of the needle core, which is far away from the probe head end, is sleeved with a luer outer conical joint; the luer outer conical joint is inserted into the luer inner conical interface to be fixed;

the tail part of the needle core is fixedly connected with an adjusting structure;

the adjusting structure is an adjusting bolt; a hollow internal thread is arranged in the luer outer conical joint and matched with an adjusting bolt in a screwing mode, and the adjusting bolt is rotated to adjust the position of the head end of the needle core at the hollow cavity channel in the probe body.

Furthermore, each centimeter position of the probe body is provided with a scale mark so as to conveniently judge the position of the probe head end in the lacrimal passage.

The invention has the beneficial effects that:

the soft lacrimal passage probe can change the probing direction along the walking direction of the pipeline and turn to the weak direction or the physiological lacrimal passage direction, so that a false passage is not easy to generate; while the short distance has certain rigidity, can detect certain stenosis and obstruction, such as valvular obstruction of neonatal dacryocystitis, mild inflammatory adhesion obstruction of adults and the like.

Meanwhile, a research method can be provided for the occurrence rate of anatomical difference (even if no lacrimal passage blockage exists, the hard lacrimal passage probe can not probe the lacrimal passage without resistance).

Drawings

FIG. 1 is a schematic perspective view of a soft lacrimal probe according to a preferred embodiment of the present invention;

FIG. 2 is a second schematic perspective view of a preferred embodiment of the lacrimal probe of the present invention;

FIG. 3 is a third schematic perspective view of a preferred embodiment of the soft lacrimal probe of the present invention;

FIG. 4 is a fourth schematic perspective view of a soft lacrimal probe according to a preferred embodiment of the present invention;

FIG. 5 is a fifth perspective view of a preferred embodiment of the irrigated soft lacrimal probe of the present invention;

FIG. 6 is a schematic view of a disassembled three-dimensional structure of a preferred embodiment of the irrigation-type lacrimal probe of the present invention;

the parts in the drawings are numbered as follows:

1. a probe tip end; 2. a probe body; 21. straight steel wires; 22. a spiral wire; 23. a lumen; 24. an opening; 25. a needle core; 3. a probe gripping portion.

Detailed Description

In the following description, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and for the purpose of facilitating understanding of structure and function thereof, some structures are not shown to scale so that advantages and features of the present invention may be more readily understood by those skilled in the art, and thus the scope of the present invention will be more clearly and clearly defined. Some description concepts in the embodiments are defined herein: the side close to the probe head end 1, i.e. the side far from the probe holding part 3 is "down" or "head" or "front"; the side close to the probe grip 3, i.e. the side away from the probe tip 1, is "up", or "tail", or "back", or "end". The side close to the geometric center line is the inner side, and the side far away from the geometric center line is the outer side. The direction along the geometric center line is longitudinal, and the direction perpendicular to the geometric center line is transverse.