Lacrimal passage probe used in cooperation with traction guide wire

Abstract

The utility model belongs to the technical field of medical instruments, and provides a lacrimal passage probe matched with a traction guide wire for use, which comprises a tubular probe and the traction guide wire which is folded and arranged in the tubular probe in a penetrating manner, and two ends of the tubular probe are respectively provided with an insertion port and a penetrating port which are communicated with an internal channel of the tubular probe. The folded closed end of the traction guide wire enters the inner cylinder channel through the insertion opening and extends out through the penetration opening; the tube diameter of the tube body of the tubular probe is uniform and unchanged. The lacrimal passage probe used in cooperation with the traction guide wire overcomes the defects that an existing lacrimal passage probe can only conduct probing in the vertical direction from top to bottom and can return and be pulled out of the lacrimal passage along the original path, the traction guide wire can only be pulled to place a supporting object upwards from the nasal cavity through the lacrimal ductule, and the supporting object cannot be placed downwards from the lacrimal point into the nasal cavity conveniently. Bidirectional pulling and bidirectional taking-out operation can be achieved, so that the operation difficulty is effectively reduced, and damage to normal parts of the lacrimal passage in the operation process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and particularly relates to a lacrimal duct probe used in conjunction with a traction guide wire. Background Art

[0002] Tear duct obstruction is a common tear duct disease that can cause long-term symptoms of epiphora. If an infection occurs, there will be symptoms of pus discharge. There are a variety of treatment methods in clinical practice. For mild patients, a tear duct probe and a tear duct flushing needle are generally used to probe and flush the tear duct, or a tear duct probe with flushing function is used to complete tear duct probing and flushing in turn. For more serious patients, in addition to the above-mentioned tear duct probing and flushing methods, supports of different shapes and textures are inserted for long-term tear duct shaping, or surgeries such as nasolacrimal cystostomy are performed to change the original tear duct structure to improve symptoms.

[0003] At present, the commonly used endoscopic dacryocystorhinostomy (En-DCR) in clinical practice requires dilation of the upper and lower lacrimal puncta, inserting the lacrimal probe from the upper lacrimal puncta into the lacrimal canaliculus and then into the lacrimal sac to enter the nasal cavity. Through the nasal endoscope, it can be observed that the probe enters the lacrimal sac from the common lacrimal duct and enters the nasal cavity through the lacrimal sac incision. Then the probe is withdrawn, and a lacrimal duct support equipped with a special lacrimal duct probe is used to pass through the lacrimal puncta, lacrimal canaliculus, and common lacrimal duct to insert into the lacrimal sac to reach the nasal cavity, thereby supporting the lacrimal canaliculus and common lacrimal duct structure. This is the antegrade intubation operation; or the traction guide wire is passed through the lumen of the probe through the lacrimal puncta to reach the nasal cavity, and the support is pulled upward from the nasal cavity through the traction guide wire, passing through the lacrimal canaliculus and lacrimal puncta to reach the ocular surface, and then inserted into the antegrade direction from another lacrimal punctum of the same eye to reach the lacrimal sac, thereby forming support for the upper and lower lacrimal canaliculi or the nasolacrimal sac anastomosis and fixing the inserted support. This is the reverse intubation operation. Existing lacrimal probes are generally provided with a connector for connecting a syringe, and the diameter of the connector is much larger than the outer diameter of the probe. This means that after the probe is completed during the surgical operation, it is necessary to return to the original path and withdraw from the lacrimal duct upwards, resulting in the need to use a traction guide wire to insert the support. During the implantation process, the support can only be pulled upwards to the lacrimal canaliculus through the nasolacrimal cystostomy, that is, pulled from bottom to top; however, due to the different shapes and hardness of different supports, it is more difficult to insert some supports through the nasal cavity to the ocular surface and then through another lacrimal point of the same eye again, which requires high surgical operation, takes a long time, and is very likely to cause lacrimal duct damage. In addition, the support inserted into the lacrimal duct antegrade through the lacrimal point needs to be equipped with a special metal probe to assist in the operation of inserting into the lacrimal duct, or an auxiliary device is required to pull the two ends of the support into the lacrimal duct. If only an ordinary traction wire is used, it is difficult to directly insert the support into the lacrimal duct through the lacrimal point and into the nasal cavity due to the hardness and elasticity of the support and traction wire materials themselves.

[0004] Therefore, it is necessary to design a lacrimal duct probe that can reduce the difficulty of using the lacrimal duct probe and the requirements of surgical operations, and can be used in conjunction with a traction guide wire. When in use, the probe can not only be withdrawn by returning to the original route, but can also be withdrawn downward through the nasal cavity, thereby facilitating the insertion of the traction wire of the traction support into the lacrimal duct through the lacrimal punctum, and then pulled out from the nasal cavity, and then the support is pulled into the lacrimal duct through the lacrimal punctum. Summary of the invention

[0005] In order to solve the above technical problems, the utility model proposes a lacrimal duct probe used in conjunction with a traction guide wire, which overcomes the shortcomings of the existing lacrimal duct probe that can only be probed in a single direction from top to bottom and returned to the original path to be pulled out of the lacrimal duct, and that the traction guide wire can only be pulled from the nasal cavity upward through the lacrimal canaliculus to place a support, but is not convenient for entering the nasal cavity from the lacrimal point downward to place a support, and realizes the operation of pulling the traction wire in both directions and removing the probe in both directions, thereby effectively reducing the difficulty of operation and reducing the damage to the normal part of the lacrimal duct during the operation.

[0006] The technical solution of the utility model is:

[0007] The utility model provides a lacrimal duct probe used in conjunction with a traction guide wire, comprising a tubular probe and a traction guide wire folded in half and inserted into the tubular probe, wherein both ends of the tubular probe are respectively provided with an insertion port and an insertion port connected to the internal channel thereof, and the folded closed end of the traction guide wire enters the inner tube channel through the insertion port and extends out through the insertion port;

[0008] The diameter of the tubular probe body is uniform and unchanged.

[0009] Preferably, the tubular probe is in any one of a straight tube shape, a bent tube shape, and an arc tube shape.

[0010] Preferably, the tubular probe is in a bent tubular shape, comprising straight portions at both ends and arc-shaped transition portions connecting the straight portions at both ends;

[0011] The angle between the straight line portions at both ends is between 3° and 17°.

[0012] Preferably, the insertion port and the penetration port are respectively arranged on the end surfaces of both ends of the tubular probe.

[0013] Preferably, the insertion port is arranged on the end surface of one end of the tubular probe, and the through port is arranged on the side surface of the other end of the tubular probe close to the end; or

[0014] The insertion port is arranged on a side surface close to the end of one end of the tubular probe, and the penetration port is arranged on an end surface of the other end of the tubular probe.

[0015] Preferably, the insertion port and the penetration port are respectively arranged on the side surfaces of the tubular probe close to both end portions.

[0016] Preferably, when the insertion port and the penetration port are arranged on the side of the tubular probe close to the end, the insertion port and the penetration port are slots penetrating the side wall of the tubular probe;

[0017] The end of the tubular probe close to the slot is provided with a solid portion, and the end of the solid portion is provided with an arc-shaped head.

[0018] Preferably, the bottom of the groove is an inclined plane, and the bottom end is adjacent to the inner wall of the tubular probe, and the top end is adjacent to the outer wall of the tubular probe; or

[0019] The bottom of the groove is an inwardly concave arc surface, and the bottom end is tangent to the inner wall of the tubular probe, and the top end is adjacent to the outer wall of the tubular probe.

[0020] Preferably, the diameter of the traction guide wire is less than 1 / 2 of the inner diameter of the tubular probe.

[0021] Preferably, the traction guidewire is any one of a stainless steel guidewire, a titanium alloy memory guidewire and a polymer memory guidewire, wherein the polymer memory guidewire is made of a shape memory polymer (SMP) material.

[0022] Preferably, the lacrimal duct probe is any one of a stainless steel probe, a titanium alloy probe, a polymer material probe, or a lacrimal duct probe made of a rigid or bendable elastic material.

[0023] Compared with the prior art, the utility model has the following advantages and effects:

[0024] (1) A tubular probe with a uniform diameter is used to overcome the defect of the existing probe with a connector. After the tubular probe is inserted into the lacrimal duct, the traction guide wire can be pulled from bottom to top or from bottom to top. The appropriate traction method can be selected according to the difficulty of inserting and removing the support, thereby improving the flexibility of use and reducing the difficulty of surgical operation.

[0025] (2) Use a bent tubular probe or an arc-shaped tubular probe. Since the locations of the lacrimal puncta and lacrimal canaliculi are not on the same vertical line as the lacrimal sac and nasolacrimal duct, and there is a physiological curvature of the lacrimal duct in between, setting a bent or arc-shaped tubular probe with a similar bending angle to that of the probe into the lacrimal duct can effectively reduce damage to the lacrimal duct.

[0026] (3) The hard tubular probe made of elastic material can bend and deform in a small range to conform to the structure of the tear duct, thereby better conforming to the physiological curvature of the tear duct and effectively reducing damage to the tear duct;

[0027] (4) An insertion port and / or a penetration port is provided on the side wall of the tubular probe, and the bottom of the groove is an inclined plane or an inwardly concave arc surface, so that the traction guide wire can be easily inserted into or passed through the internal channel of the tubular probe without applying a large thrust, thereby avoiding accidental sharp damage to the tear duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a lacrimal duct probe used in conjunction with a traction guidewire in Example 1 of the present utility model;

[0029] Figure 2 This is a schematic structural diagram of a tubular probe in a lacrimal duct probe used in conjunction with a traction guide wire in Example 2 of the present utility model;

[0030] Figure 3 This is a schematic diagram of the internal structure of the slotted opening at the tubular probe outlet of the lacrimal duct probe used in conjunction with the traction guide wire in Example 2 of the present utility model;

[0031] Figure 4 This is a schematic diagram of the structure of a tubular probe in a lacrimal duct probe used in conjunction with a traction guide wire in Example 3 of the present utility model;

[0032] Figure 5 This is a schematic diagram of the internal structure of the slotted opening at the tubular probe outlet of the lacrimal duct probe used in conjunction with the traction guide wire in Example 3 of the present utility model;

[0033] Figure 6 This is a schematic structural diagram of a tubular probe in a lacrimal duct probe used in conjunction with a traction guidewire in Example 4 of the present utility model;

[0034] Figure 7 This is a schematic diagram of the structure of a tubular probe in a lacrimal duct probe used in conjunction with a traction guide wire in Example 5 of the present utility model;

[0035] Figure 8 This is a schematic diagram of the structure of a tubular probe in a lacrimal duct probe used in conjunction with a traction guide wire in Example 6 of the present invention.

[0036] Figure numerals: 1. tubular probe; 11. insertion port; 12. through port; 13. straight portion; 14. arc-shaped transition portion; 15. slot; 16. solid portion; 17. arc-shaped head; 2. traction guide wire. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present invention, the present invention is now further described in conjunction with specific implementation methods.

[0038] Embodiment 1:

[0039] like Figure 1As shown, the utility model provides a lacrimal duct probe used in conjunction with a traction guidewire, comprising a tubular probe 1 and a traction guidewire 2 folded in half and inserted into the tubular probe 1, wherein the tubular probe 1 is in a straight tube shape.

[0040] An insertion port 11 and a through port 12 connected to the internal passage are respectively provided at both ends of the tubular probe 1. The insertion port 11 and the through port 12 are respectively provided at the end surfaces of the two ends of the tubular probe 1. That is, the tubular probe 1 is a through tube with both ends opened. The traction guide wire 2 is folded in half and passed through the inside of the tubular probe 1. The folded closed end of the traction guide wire 2 enters the internal passage through the insertion port 11 and extends out through the through port 12.

[0041] Optionally, in some embodiments, the outer edges of the insertion port 11 and the penetration port 12 are provided with a rounded structure to avoid causing sharp damage to the physiological tissue of the lacrimal duct.

[0042] The diameter of the tubular probe 1 is uniform, and the outer diameter and inner diameter of the tubular probe 1 are consistent, that is, the thickness of the entire tubular probe 1 is uniform, so that the tubular probe 1 can exit the lacrimal duct (the upper lacrimal punctum) from the original route or probe out of the lacrimal duct (nasal duct) from the bottom.

[0043] The traction guide wire 2 is a stainless steel guide wire, a titanium alloy memory guide wire, or a polymer memory guide wire, which has a certain degree of resistance to ductility and is not easy to break. The diameter of the traction guide wire 2 is less than 1 / 2 of the inner diameter of the tubular probe 1, so that the traction guide wire 2 can pass through the internal channel of the tubular probe 1; the tubular probe 1 is a metal probe, a nickel-titanium alloy probe, or an elastic polymer probe that can be slightly bent. Optionally, the tubular probe 1 can be disposable or reusable.

[0044] This embodiment takes the endoscopic dacryocystorhinostomy (En-DCR) surgery as an example. During use, the lacrimal duct catheter or packing dressing is pulled out from the lacrimal sac nasal cavity through the lacrimal canaliculus to the outside of the eye (from bottom to top), or pulled from the outside of the lacrimal punctum through the lacrimal canaliculus to the lacrimal sac nasal cavity (from top to bottom), that is, the traction guide wire 2 and the lacrimal duct probe matched therewith can return through the lacrimal canaliculus, or can be taken out through the nasal cavity downward. Thus, the traction guide wire 2 can be pulled upward from the nasal cavity lacrimal sac to the outside of the lacrimal duct, or the traction guide wire 2 can be pulled downward from the lacrimal punctum and pulled out through the nasal cavity, so that the traction guide wire 2 can pass through the lacrimal canaliculus in both directions (from bottom to top or from top to bottom), thereby realizing the annular placement of the lacrimal duct catheter into the double lacrimal canaliculus, or pulling the lacrimal sac packing material from the lacrimal sac through the lacrimal canaliculus to the outside of the lacrimal punctum.

[0045] Embodiment 2:

[0046] For Example 2 of the utility model, Figure 2 , Figure 3 Note that description of parts that are not different from those in Embodiment 1 will be omitted and will be given the same reference numerals.

[0047] like Figure 2 , Figure 3 As shown, the utility model relates to a lacrimal duct probe used in conjunction with a traction guide wire, wherein an insertion port 11 is arranged on the end face of one end of the tubular probe 1, and a through port 12 is arranged on the side surface near the other end of the tubular probe 1, and a chamfered structure is arranged on the outer edge of the insertion port 11, and the through port 12 is a groove 15 that penetrates the side wall of the tubular probe 1 and is connected to the internal channel, and a solid portion 16 is arranged near the end of the groove 15, and an arc-shaped head 17 is arranged at the end of the solid portion 16.

[0048] refer to Figure 3 As shown, the bottom of the slot 15 is an inclined plane, and its bottom end is adjacent to the inner wall of the tubular probe 1, and the top end is adjacent to the outer wall of the tubular probe 1. The traction guide wire 2 can extend outward along the inclined plane, and the other end does not need to apply a large thrust, and the traction guide wire 2 can be easily pushed out of the outlet 12.

[0049] Optionally, in some embodiments, the insertion port 11 is arranged on the side surface near the end of one end of the tubular probe 1, and the through port 12 is arranged on the end surface of the other end of the tubular probe 1 (not shown in the figure). The principle is the same as that of the present embodiment, except that the insertion port 11 and the through port 12 are swapped, which will not be repeated here.

[0050] Embodiment 3:

[0051] For Example 3 of the utility model, Figure 4 , Figure 5 In addition, descriptions of parts that are not different from those in Embodiment 2 are omitted, and the same reference numerals are given.

[0052] like Figure 4 , Figure 5 As shown, the utility model relates to a lacrimal duct probe used in conjunction with a traction guide wire, wherein the bottom of the groove 15 is a concave arc surface, and its bottom end is tangent to the inner wall of the tubular probe 1, and the top end is adjacent to the outer wall of the tubular probe 1. The concave arc surface tangent to the inner wall of the tubular probe 1 (the bottom inner wall opposite to the groove 15) can improve the smoothness of pushing out the traction guide wire 2, which is convenient for the operator to timely perceive whether the traction guide wire 2 extends out of the outlet 12 through tactile feedback.

[0053] Embodiment 4:

[0054] For Example 4 of the utility model, Figure 6 In addition, descriptions of parts that are not different from those in Embodiment 3 are omitted, and the same reference numerals are given.

[0055] like Figure 6As shown, the utility model relates to a lacrimal duct probe used in conjunction with a traction guide wire, wherein the tubular probe 1 is in a bent tubular shape, comprising straight portions 13 at both ends and an arc-shaped transition portion 14 connecting the straight portions 13 at both ends. Specifically, the angle between the straight portions 13 at both ends is 17°, which can adapt to the physiological curvature of the lacrimal duct and avoid damage to the lacrimal duct such as pulling, squeezing, etc.

[0056] Embodiment 5:

[0057] For Example 2 of the utility model, Figure 7 In addition, descriptions of parts that are not different from those of Embodiment 4 are omitted, and the same reference numerals are given.

[0058] like Figure 7 As shown, the utility model relates to a lacrimal duct probe used in conjunction with a traction guide wire, wherein the tubular probe 1 is in an arc-shaped tube shape, the tubular probe 1 has a small bending degree, and its bending angle is similar to that of the lacrimal puncta, lacrimal canaliculus, lacrimal sac, and nasal cavity.

[0059] Embodiment 6:

[0060] For Example 6 of the utility model, Figure 8 Note that description of parts that are not different from those in Embodiment 1 will be omitted and will be given the same reference numerals.

[0061] like Figure 8 As shown, the utility model relates to a lacrimal duct probe used in conjunction with a traction guide wire, wherein an insertion port 11 and a penetration port 12 are respectively arranged on the side surfaces of a tubular probe 1 close to both end portions, and both end portions of the tubular probe 1 are provided with arc-shaped heads 17, which can facilitate the insertion of the tubular probe 1 into the lacrimal duct and effectively avoid sharp damage to the physiological tissue inside the lacrimal duct.

[0062] To sum up, the lacrimal duct probe provided by the utility model for use with a traction guide wire overcomes the shortcomings of existing lacrimal duct probes that can only be probed in a single direction from top to bottom and returned to the original path to be pulled out of the lacrimal duct, and that the traction guide wire can only be pulled from the nasal cavity upward through the lacrimal canaliculus to place a support, but is not convenient for entering the nasal cavity from the lacrimal point downward to place a support, thereby achieving two-way pulling and two-way removal operations, thereby effectively reducing the difficulty of operation and reducing damage to the normal part of the lacrimal duct during surgery.

[0063] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A lacrimal duct probe for use with a traction guidewire, comprising a tubular probe (1) and a traction guidewire (2) folded in half and inserted into the tubular probe (1), characterized in that: The tubular probe (1) is provided with an insertion port (11) and a through port (12) respectively at both ends thereof, the folded closed end of the traction guide wire (2) enters the inner tube channel through the insertion port (11) and extends out through the through port (12); The diameter of the tube body of the tubular probe (1) is uniform and constant.

2. The lacrimal duct probe used in conjunction with the traction guidewire according to claim 1, characterized in that: The tubular probe (1) is in any one of a straight tube shape, a bent tube shape, and an arc tube shape.

3. The lacrimal duct probe used in conjunction with the traction guidewire according to claim 2, characterized in that: The tubular probe (1) is in the shape of a bent tube, comprising straight portions (13) at two ends and an arc-shaped transition portion (14) connecting the straight portions (13) at the two ends; The angle between the straight line portions (13) at both ends is between 3° and 17°.

4. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 1, characterized in that: The insertion opening (11) and the penetration opening (12) are respectively arranged on the end surfaces of both ends of the tubular probe (1).

5. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 1, characterized in that: The insertion port (11) is arranged on the end surface of one end of the tubular probe (1), and the through port (12) is arranged on the side surface of the other end of the tubular probe (1) close to the end; or The insertion port (11) is arranged on a side surface close to an end portion of one end of the tubular probe (1), and the penetration port (12) is arranged on an end surface of an end portion of the other end of the tubular probe (1).

6. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 1, characterized in that: The insertion opening (11) and the penetration opening (12) are respectively arranged on the side surfaces of the tubular probe (1) close to both end portions.

7. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 5 or 6, characterized in that: When the insertion opening (11) and the penetration opening (12) are arranged on the side of the tubular probe (1) close to the end, the insertion opening (11) and the penetration opening (12) are in the form of slots (15) penetrating the side wall of the tubular probe (1); The tubular probe (1) is provided with a solid portion (16) at the end close to the slot (15), and an arc-shaped head (17) is provided at the end of the solid portion (16).

8. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 7, characterized in that: The bottom of the groove (15) is an inclined plane, and its bottom end is adjacent to the inner wall of the tubular probe (1), and its top end is adjacent to the outer wall of the tubular probe (1); or The bottom of the groove (15) is an inwardly concave arc surface, and its bottom end is tangent to the inner wall of the tubular probe (1), and its top end is adjacent to the outer wall of the tubular probe (1).

9. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 1, characterized in that: The diameter of the traction guide wire (2) is less than 1 / 2 of the inner diameter of the tubular probe (1).

10. The lacrimal duct probe used in conjunction with a traction guidewire according to claim 1, characterized in that: The traction guide wire (2) is any one of a stainless steel guide wire, a titanium alloy memory guide wire, and a polymer memory guide wire.

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