Anastomosis tube for dacryocystorhinostomy

Abstract

The application provides an anastomotic orifice shaping tube for dacryocystorhinostomy, which comprises a lacrimal passage guide tube and an inflatable support sleeve, one end of the lacrimal passage guide tube is fixedly connected with a probe, the other end is provided with a lacrimal point fixing plug which is detachably connected, a positioning point and a fissure are arranged in the middle of the lacrimal passage guide tube, the fissure is arranged between the positioning point and the lacrimal point fixing plug, the inflatable support sleeve comprises a hollow main shaft and an inflatable layer which is wrapped on the shaft surface of the hollow main shaft, and the lacrimal passage guide tube penetrates through the hollow main shaft in the use state; the anastomotic orifice shaping tube can be fixed to the anastomotic orifice and conveniently taken out, can provide sufficient support for the anastomotic orifice, and can be micro-plastic shaped according to the shape of the anastomotic orifice to make the lacrimal sac mucosa and the nasal mucosa produce sufficient contact, which is beneficial to incision healing and anastomotic orifice formation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, in particular to an anastomotic stoma shaping tube for dacryocystorhinostomy. BACKGROUND

[0002] Dacryocystitis is a common disease in clinical practice, especially in perimenopausal women, with an incidence of about 1 / 10 of the total population. The current treatment for dacryocystitis is a combination of various methods: Dacryocystorhinostomy (DCR) has been considered as a classic treatment method with high success rate, but the incision of the skin damages the orbicularis oculi muscle, resulting in partial loss of its pumping function; and postoperative skin scarring affects appearance.

[0003] With the development of endoscopic technology, the concept of minimally invasive surgery for the treatment of lacrimal duct disease has become increasingly popular. En-DCR (endoscopic dacryocystorhinostomy) is a procedure performed under endoscopic visualization to open the lacrimal sac mucosa above the obstruction site, allowing it to fully open into the nasal cavity and heal in apposition with the nasal mucosa. However, there is a bone barrier between the nasal mucosa and the lacrimal sac (part of the maxilla and part of the lacrimal bone), and if the lacrimal sac mucosa is to successfully appose the nasal mucosa, sufficient contact between the two is required. Otherwise, even if the lacrimal sac is opened and part of the nasal mucosa is removed, it will close along its original growth pattern. Compared with the classic treatment model, En-DCR has the following advantages: 1) less iatrogenic damage, avoiding skin scarring, not needing to cross the orbicularis oculi muscle, and not damaging the pumping function of the lacrimal fluid; 2) can address nasal factors that contribute to the failure of dacryocystorhinostomy, such as middle turbinate hypertrophy, nasal polyps, and nasal septum deviation; 3) can be performed as a transnasal procedure in cases of acute dacryocystitis, allowing for simultaneous treatment and drainage; and 4) transnasal repair of cases of external recurrence causes minimal trauma.

[0004] However, studies have shown that the success rate of En-DCR is lower than that of Ex-DCR (transcutaneous dacryocystorhinostomy), and the long-term patency of the lacrimal passage will be further reduced, and the disease will recur and the lacrimal passage will be blocked again. There are many reasons for the failure of the operation, and the most common reason is that the anastomotic stoma of the lacrimal passage is blocked due to scar hyperplasia. Therefore, preventing anastomotic stoma from being blocked is the key to improving the success rate of endoscopic surgery. In order to prevent recurrence, some doctors implant silicone tubes in the lacrimal passage for support, but the diameter of the silicone tube is very small, only about 1mm, which is not enough to provide sufficient support to the anastomotic stoma. It only provides effective support to patients who already have total lacrimal duct obstruction. Clinically, it is often seen that the mucosa between the lacrimal passage support tubes is hyperplastic and wrapped around the support tubes to form granulation tissue, which is not conducive to the opening of the anastomotic stoma. In the prior art, the sponge is trimmed into a certain shape and filled into the open anastomotic stoma. The sponge expands when it comes into contact with water, which can fully support the lacrimal sac mucosa and make it butt joint with the nasal mucosa. However, in clinical practice, it is often encountered that the sponge is adhered to the mucosa at the incision site when it is removed, which is not easy to remove cleanly, and the longer the sponge is placed, the more obvious this phenomenon will be. If it is removed too early, the anastomotic stoma may be significantly contracted.

[0005] To solve the problem of anastomotic stoma occlusion, the prior art has applied melo glue to endoscopic dacryocystorhinostomy. However, because melo glue is very soft and deforms when it comes into contact with water, it is not easy to apply, so even skilled endoscopic surgeons still need to spend a lot of time laying it. For anastomotic stoma with scar tissue, some doctors have also tried to use antiproliferative mitomycin C to coat the anastomotic stoma to inhibit tissue hyperplasia around the anastomotic stoma. However, the dosage and duration of action of mitomycin C are still not determined, and some studies have found that there is no significant difference between using and not using it in preventing anastomotic stoma scar hyperplasia.

[0006] Studies have shown that the reason for the failure of the operation is often that the lacrimal sac mucosa and the nasal mucosa do not form a good anastomosis, so the anastomotic stoma needs to be supported enough to prevent the nasal mucosa from hyperplasia and the formation of anastomotic stoma scar. SUMMARY

[0007] In view of the above-mentioned shortcomings of the prior art, the present application provides an anastomotic stoma shaping tube for dacryocystorhinostomy to solve the problems of anastomotic stoma occlusion and anastomotic stoma scar formation in the prior art endoscopic dacryocystorhinostomy.

[0008] To achieve the above object and other related objects, the present application provides an anastomotic stoma forming tube for dacryocystorhinostomy, comprising a lacrimal passage guide tube and an inflatable support sleeve, one end of the lacrimal passage guide tube is fixedly connected with a probe, the other end is provided with a lacrimal point fixed plug which is detachably connected, a positioning point and a fissure are arranged in the middle of the lacrimal passage guide tube, the fissure is arranged between the positioning point and the lacrimal point fixed plug, the inflatable support sleeve comprises a hollow main shaft and an inflatable layer wrapped on the shaft surface of the hollow main shaft, and in use, the lacrimal passage guide tube penetrates through the hollow main shaft.

[0009] Preferably, in use, the positioning point positions the common canaliculus relative to the positioning point and / or the fissure, the lacrimal point fixed plug is inserted into the fissure, and the inflatable support sleeve is inflated to support the anastomotic stoma of dacryocystorhinostomy.

[0010] Preferably, the inflatable layer comprises an inflatable sponge layer and a smooth film layer, and the smooth film layer wraps the inflatable sponge layer on the shaft surface of the hollow main shaft.

[0011] Preferably, a plurality of mark lines are arranged at equal intervals between the positioning point and the fissure, and the mark lines are suitable for measuring the distance between the common canaliculus and the positioning point and / or the fissure.

[0012] Preferably, the lacrimal point fixed plug comprises an L-shaped fixed column body and a sheet-shaped clamping body, the L-shaped fixed column body and the sheet-shaped clamping body are in one-piece structure, and the lacrimal point fixed plug is detachably connected to one end of the lacrimal passage guide tube through the L-shaped fixed column body.

[0013] Preferably, the lacrimal passage guide tube is a silica gel hose.

[0014] Preferably, the inflatable support sleeve is in the shape of a cone in the inflated state.

[0015] Preferably, the lacrimal point fixed plug is a silica gel plug.

[0016] Preferably, the probe is a stainless steel probe wrapped with a silica gel hose.

[0017] Preferably, the hollow main shaft is a plastic tube, and the inner diameter of the hollow main shaft is equal to the outer diameter of the lacrimal passage guide tube.

[0018] As described above, the anastomotic stoma forming tube for dacryocystorhinostomy and the using method thereof have the following beneficial effects:

[0019] 1) The anastomotic stoma forming tube for dacryocystorhinostomy can provide sufficient support for the anastomotic stoma, so that the lacrimal sac mucosa spreads and contacts the nasal mucosa in position, and wound healing is facilitated.

[0020] 2) The anastomotic stoma shaping tube for dacryocystorhinostomy of the present application has a smooth surface and does not cause adhesion to the surrounding tissue and does not stimulate the surrounding tissue to produce granulation.

[0021] 3) The anastomotic stoma shaping tube for dacryocystorhinostomy of the present application has a small volume when the inflatable support sleeve enters the nasal cavity, can expand and preliminarily shape according to the shape of the anastomotic stoma when encountering water, and enables the dacryocyst mucosa and the nasal mucosa to be in sufficient contact.

[0022] 4) The anastomotic stoma shaping tube for dacryocystorhinostomy of the present application can be accurately positioned when used, and is fixed exactly and not easy to move, and has a smooth surface and is convenient to take out. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure shows the schematic diagram of the lacrimal passage guide tube of the present application.

[0024] Figure 2 The figure shows the schematic diagram of the lacrimal punctum fixing plug of the present application.

[0025] Figure 3 The figure shows the schematic diagram of the cross section of the inflatable support sleeve of the present application.

[0026] Figure 4 The figure shows the schematic diagram of the inflatable support sleeve of the present application.

[0027] Figure 5 The figure shows the schematic diagram of the lacrimal passage guide tube penetrating the inflatable support sleeve when the anastomotic stoma shaping tube for dacryocystorhinostomy of the present application is used.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1 lacrimal passage guide tube

[0030] 2 inflatable support sleeve

[0031] 3 lacrimal punctum fixing plug

[0032] 4 probe

[0033] 11 positioning point

[0034] 12 slit

[0035] 13 marking line

[0036] 21 hollow main shaft

[0037] 22 inflatable sponge layer

[0038] 23 smooth film layer

[0039] 24 side hole

[0040] 31 L-shaped fixed column

[0041] 32 sheet type card body

[0042] 311 connecting portion DETAILED DESCRIPTION

[0043] Other advantages and benefits of the present application will become apparent to those skilled in the art upon reading and understanding the following detailed description of the application. The present application may be carried out in other specific ways than those herein set forth without departing from the essential spirit and essential characteristics of the disclosure. Embodiments of this application are, therefore, apparent to those skilled in the art from this disclosure.

[0044] Reference will now be made to the drawings, wherein Figures 1-5 It is to be understood that the drawings are to be used for purposes of illustration only, and that those of ordinary skill in the art, upon reading and comprehending the specification, will be able to devise their own implementations and embodiments of the present application, without departing from the spirit and scope of the present application.

[0045] The application provides an anastomotic stoma shaping tube for dacryocystorhinostomy, comprising a lacrimal passage guide tube 1 and an inflatable support sleeve 2, one end of the lacrimal passage guide tube 1 is fixedly connected with a probe 4, the other end is provided with a lacrimal point fixed plug 3 which is detachably connected, the middle part of the lacrimal passage guide tube 1 is provided with a positioning point 11 and a fissure 12, the fissure 12 is arranged between the positioning point 11 and the lacrimal point fixed plug 3, the inflatable support sleeve 2 comprises a hollow main shaft 21 and an inflatable layer wrapped on the shaft surface of the hollow main shaft 21, and in the use state, the lacrimal passage guide tube 1 penetrates through the hollow main shaft 21.

[0046] The anastomotic stoma shaping tube for dacryocystorhinostomy of the application can accurately control the position of the inflatable support sleeve 2 by arranging the positioning point 11 and the fissure 12 on the lacrimal passage guide tube 1, and after the inflatable support sleeve 2 reaches the appropriate position under the guidance of the lacrimal passage guide tube 1, the lacrimal point fixed plug 3 at the end of the lacrimal passage guide tube 1 is taken off and clamped into the fissure 12 to fix it, and finally the inflatable support sleeve 2 is inflated to fit the anastomotic stoma, thereby forming a good support effect on the anastomotic stoma.

[0047] The anastomotic stoma shaping tube for dacryocystorhinostomy of the application, in the use state, the positioning point 11 positions the common lacrimal duct and the relative position of the positioning point 11 and / or the fissure 12, the lacrimal point fixed plug 3 is clamped into the fissure 12, and the inflatable support sleeve 2 is inflated to support the dacryocystorhinostomy.

[0048] In use, when the fissure reaches the upper lacrimal point, the distance between the positioning point 11 and the common lacrimal duct can be observed to determine the fixed position of the inflatable support sleeve 2 on the lacrimal passage guide tube 1.

[0049] The tear duct guide tube 1 is a silica gel hose. When the tear duct guide tube 1 passes through the hollow main shaft 21 from the head end to the tail end of the inflatable support sleeve 2, the silica gel hose material of the tear duct guide tube 1 is stretched, the diameter is thinned to facilitate passing, and when the pulling is stopped, the tear duct guide tube 1 and the hollow main shaft 21 are tightly connected together, having the effect of preventing slipping. In the preferred embodiment of the present application, the tear duct guide tube 1 is 16 cm long. The outer diameter of the tear duct guide tube 1 is 6 mm.

[0050] The inflatable support sleeve 2 is in the shape of a cone in the expanded state. The top of the cone is the head end of the inflatable support sleeve 2, and the bottom of the cone is the tail end of the inflatable support sleeve 2. By controlling the amount of expansion sponge in each part of the expansion sponge layer 22, the volume of the head end of the inflatable support sleeve 2 is small and the volume of the tail end of the inflatable support sleeve 2 is large when the liquid is injected into the side hole 24, so that the inflatable support sleeve 2 is expanded to match the shape of the anastomotic stoma, thereby providing good support.

[0051] The lacrimal point fixing plug 3 is a silica gel plug.

[0052] The probe 4 is a stainless steel probe wrapped with a silica gel hose. The probe 4 is integrally connected with the tear duct guide tube 1. In the preferred embodiment of the present application, the probe 4 is 11 cm long, and the diameter of the probe 4 is 0.4-0.6 mm. The top end of the probe 4 is designed as a blunt round shape, which is not easy to cause damage to the nasal lacrimal sac.

[0053] The hollow main shaft 21 is a plastic tube, and the inner diameter of the hollow main shaft 21 is equal to the outer diameter of the tear duct guide tube 1. The length of the hollow main shaft 21 is 5-7 mm. The hollow main shaft 21 is a plastic tube with support capability, which is convenient for expansion with the expansion sponge layer 22 as the main shaft. The top end of the plastic tube can be smoothly processed, which is convenient for the probe 4 to pull, draw and fix the tear duct guide tube 1.

[0054] In the anastomotic stoma shaping tube for lacrimal sac-nasal anastomosis of the present application, the inflatable layer includes an expansion sponge layer 22 and a smooth film layer 23, and the smooth film layer 23 covers the shaft surface of the hollow main shaft 21.

[0055] The inflatable layer is provided with a side hole 24, and the side hole 24 is suitable for injecting liquid into the expansion sponge layer. In the preferred embodiment of the present application, the side hole 24 is arranged at the bottom side of the inflatable support sleeve 2, so that the liquid can be injected into the expansion sponge layer 22 through the side hole 24.

[0056] The smooth film layer 23 is expandable silica gel. The smooth film layer 23 is soft and easy to deform. The surface of the expanded sponge layer 22 is coated with the smooth and easy-to-deform expandable silica gel, which facilitates the expansion of the expanded sponge layer 22 after injecting liquid through the side hole 24, and prevents the expanded sponge layer 22 from adhering to the anastomotic stoma. If the smooth film layer 23 is not used for coating, and the expanded sponge is directly adhered to the hollow spindle 21 to form a conical support body with a large lower end and a small upper end, the expanded sponge is easy to adhere to the anastomotic stoma, although it also has a supporting effect. In comparison, if a gas bag is used instead of the expanded sponge, the shape of the pre-prepared gas bag is fixed, and the adhesion to the anastomotic stoma is poor.

[0057] In the anastomotic stoma shaping tube for dacryocystorhinostomy of the present application, a plurality of mark lines 13 are arranged at equal intervals between the positioning point 11 and the fissure 12. The mark lines 13 are suitable for measuring the distance between the common canaliculus and the positioning point 11 and / or the fissure 12. The distance between the common canaliculus and the positioning point 11 can be obtained through the scale of the mark lines 13, so as to determine the fixed position of the expandable support sleeve 2.

[0058] The distance between the positioning point 11 and the fissure 12 is 2 cm.

[0059] The mark line 13 is arranged at a position 1 cm away from the positioning point 11 with an interval of 2 mm.

[0060] The positioning point 11 is a mark point arranged on the surface of the lacrimal passage guide tube 1. The positioning point 11 can be a mark point with obvious marking effect with color. In the preferred embodiment of the present application, the positioning point 11 is arranged at the middle of the lacrimal passage guide tube 1, i.e. at a position 8 cm.

[0061] The fissure 12 is a long strip-shaped crack arranged on the lacrimal passage guide tube 1 along the length direction of the lacrimal passage guide tube 1. The length of the fissure 12 is the same as the inner diameter of the lacrimal passage guide tube 1. The fissure 12 can be marked with a color point, which is easy to find in the operation.

[0062] In the anastomotic stoma shaping tube for dacryocystorhinostomy of the present application, the punctum fixing plug 3 comprises an L-shaped fixing column 31 and a sheet-shaped clamping body 32. The L-shaped fixing column 31 and the sheet-shaped clamping body 32 are integrated, and the punctum fixing plug 3 is detachably connected to one end of the lacrimal passage guide tube 1 through the L-shaped fixing column 31. In the use state, the punctum fixing plug 3 is clamped into the fissure 12 to prevent the expandable support sleeve 2 from slipping off.

[0063] The end of the L-shaped fixing column 31 connected to the lacrimal passage guide tube 1 is a cylindrical body with a diameter equal to the inner diameter of the lacrimal passage guide tube 1.

[0064] The sheet-shaped clamping body 32 is in the shape of a semi-elliptical flat sheet, which is parallel to the outer surface of the lacrimal passage guide tube 1.

[0065] In use, the tear point fixed plug 3 is clamped into the fissure 12 by the L-shaped fixed column 31. The fissure 12 can be fixed at the upper punctum.

[0066] The tear point fixed plug 3 of the anastomotic orifice forming tube for dacryocystorhinostomy is in U-shaped structure as a whole. In use, the tear point fixed plug 3 in U-shaped structure is clamped at the upper punctum, that is, the cylindrical end of the L-shaped fixed column 31 is inserted into the fissure 12 and connected with the lacrimal passage guide tube 1 in the upper lacrimal canal. The column height of the connecting part 311 of the L-shaped fixed column 31 and the sheet-shaped clamping body 32 is about 1.0-2.0 mm, which is clamped at the punctum to prevent the inflatable support sleeve 2 from sliding downward and ensure that the support is in place. The sheet-shaped clamping body 32 connected with the connecting part 311 is in semi-elliptical flat sheet shape, which is clamped outside the upper punctum and adhered to the nasal skin outside the punctum, without friction with the temporal side. Meanwhile, the tear point fixed plug 3 has the characteristics of small volume and detachability. When not in use, the tear point fixed plug 3 is placed at the end of the lacrimal passage guide tube 1. In use, the tear point fixed plug 3 is pulled out from the end of the lacrimal passage guide tube 1 and inserted into the fissure 12.

[0067] The tear point fixed plug 3 of the anastomotic orifice forming tube for dacryocystorhinostomy can also be provided in the structure that the L-shaped fixed column 31 is connected with the elliptical roof fall. The elliptical roof fall is an elliptical silica gel. The elliptical roof fall is a silica gel sheet with a size of 1*1.5 mm.

[0068] In a preferred embodiment, the method for using the anastomotic orifice forming tube for dacryocystorhinostomy comprises the following steps:

[0069] S1, the probe 4 end of the lacrimal passage guide tube 1 is inserted from the upper punctum, passes out from the common lacrimal duct, the probe 4 end passes out from the lacrimal passage anastomotic orifice and pulls out from the nasal cavity. When the fissure 12 reaches the upper punctum, the mark line 13 from the common lacrimal duct to the positioning point 11 is observed, and the distance A is recorded until the positioning point 11 reaches the nasal cavity opening position;

[0070] S2, the probe 4 passing out from the nasal cavity is inserted into the head end of the inflatable support sleeve 2, and the inflatable support sleeve 2 is pulled up to the head end to the position with a distance A from the positioning point 11;

[0071] S3, the lacrimal passage guide tube 1 with the probe 4 end after the knot at the tail end is cut off;

[0072] S4, the lacrimal passage guide tube 1 is pulled up from the upper punctum to the fissure 12 again to correspond to the upper punctum, the tear point fixed plug 3 is pulled out from the end of the lacrimal passage guide tube 1 and inserted into the fissure 12, and clamped at the upper punctum. The lacrimal passage guide tube 1 after the fissure 12 is cut off;

[0073] S5, injecting liquid into the inflatable layer to inflate the inflatable support sleeve 2, observing and adjusting the position of the inflatable support sleeve 2 as appropriate.

[0074] In the method for using the anastomotic orifice shaping tube for dacryocystorhinostomy, the lacrimal passage guide tube 1 is a silica gel hose with a scale ruler, facilitating accurate measurement of the fixed position of the inflatable support sleeve 2, being pullable and capable of preventing sliding; the inflatable support sleeve 2 is a support that can be inflated, fixed, preliminarily shaped and capable of preventing adhesion. In use, the inflatable support sleeve 2 can be shaped according to the shape of the anastomotic orifice, the surface is smooth and does not produce adhesion, and the volume is small when placed, and when the lacrimal sac mucosa is ensured to be in an expanded state, the inflatable layer is injected with liquid to inflate the inflatable sponge layer 23, which can not only accurately support but also has a large supporting effect; the lacrimal passage guide tube 1 penetrates and fixes the inflatable support sleeve 2, and is provided with a lacrimal point fixing plug 3 to prevent the inflatable support sleeve 2 from slipping off.

[0075] The specific process of step S1 is that the probe 4 end of the lacrimal passage guide tube 1 is inserted from the upper lacrimal point, penetrates out of the common lacrimal duct, the probe 4 end penetrates out of the lacrimal passage anastomotic orifice and is pulled in the direction of the nasal cavity, when the fissure 12 reaches the upper lacrimal point, the number of mark lines 13 between the common lacrimal duct and the positioning point 11 is observed (the distance between two adjacent mark lines 13 is 2 mm), and the distance A between the common lacrimal duct and the positioning point 11 is obtained, if there are three mark lines 13, A = 6 mm; if there are four mark lines 13, A = 8 mm; continue to pull the probe 4 until the positioning point 11 on the lacrimal passage guide tube 1 reaches the position of the nasal cavity opening.

[0076] The specific process of step S2 is that the probe 4 end is inserted into the head end of the inflatable support sleeve 2, and the inflatable support sleeve 2 is pulled to a position A away from the head end of the positioning point 11; that is, when A = 6 mm, the inflatable support sleeve 2 is pulled to a position 3 mark lines 13 away from the head end of the positioning point 11. In the same way, the inflatable support sleeve 2 is pulled to a position away from the head end of the positioning point 11 by the observed mark lines 13.

[0077] The specific process of step S3 is that when the head end of the inflatable support sleeve 2 is placed at a position A away from the positioning point, the lacrimal passage guide tube 1 inserted out of the tail end of the inflatable support sleeve 2 is knotted at the tail end of the inflatable support sleeve 2, and the lacrimal passage guide tube 1 of the probe end after the knot is cut off.

[0078] The specific process of step S4 is as follows: the lacrimal passage guide tube 1 is pulled upward from the superior punctum, and the lacrimal passage guide tube 1 and the inflatable support sleeve 2 are moved upward to the anastomotic stoma together, at this time the fissure 12 is located near the superior punctum. The L-shaped fixed column body 31 of the punctum fixed plug 3 is inserted into the fissure 12, the connecting part 311 is clamped at the superior punctum, the sheet-shaped clamping body 32 is closely attached to the skin outside the punctum, the lacrimal passage guide tube 1 is cut off after the fissure 12, and the residual end of the lacrimal passage guide tube 1 is inserted into the ampulla of the superior punctum.

[0079] The specific process of step S5 is as follows: liquid is injected from the side hole 24 to make the inflatable support sleeve 2 swell, and the swelling process is observed. The instrument is used to push and shape the inflatable support sleeve 2 to swell and attach to the open lacrimal sac, and the position of the inflatable support sleeve 2 is adjusted under the nasal endoscope.

[0080] Example 1

[0081] The anastomotic stoma shaping tube used in this example for lacrimal sac-nasal anastomosis includes a lacrimal passage guide tube as shown in Figure 1 , a punctum fixed plug as shown in Figure 2 , and an inflatable support sleeve as shown in Figures 3-4 . The probe is a stainless steel probe wrapped with a silicone hose; the probe is 11 cm long and 4 mm in diameter; the lacrimal passage guide tube is 16 cm long and 6 mm in diameter; the probe and the lacrimal passage guide tube are of an integrated structure; the positioning point is located at the middle of the lacrimal passage guide tube, i.e. at 8 cm; the distance between the positioning point and the fissure is 2 cm, and the marking lines are set at equal intervals from the positioning point to 1 cm in the direction of the fissure, with a spacing of 2 mm between adjacent two marking lines. The punctum fixed plug is made of silicone. The cylindrical body of the L-shaped fixed column body in the punctum fixed plug is equal in diameter to the inner diameter of the lacrimal passage guide tube, and the sheet-shaped clamping body is a semi-elliptical silicone sheet. The hollow main shaft of the inflatable support sleeve is a plastic tube, and the inner diameter of the hollow main shaft is equal to the outer diameter of the lacrimal passage guide tube. The hollow main shaft is 5 mm long. The smooth film layer is inflatable silicone. The tail of the inflatable support sleeve is provided with apertures for injecting liquid into the inflatable sponge layer.

[0082] In use: dilate the punctum, insert the probe end of the lacrimal passage guide tube from the superior punctum, pass through the common canaliculus, pass the probe end of the lacrimal passage guide tube out of the anastomotic site and pull in the direction of the nasal cavity, when the lacrimal passage guide tube reaches the superior punctum, observe that the number of marking lines between the common canaliculus and the positioning point is 3, i.e. the distance between the common canaliculus and the positioning point is 6 mm, continue to pull the probe until the positioning point on the lacrimal passage guide tube reaches the position of the nasal cavity opening. Insert the probe end into the head end of the inflatable support sleeve, and pull the inflatable support sleeve to a position 3 marking lines past the head end of the inflatable support sleeve, tie a knot at the tail end of the inflatable support sleeve, and cut off the lacrimal passage guide tube after the knot. Pull the lacrimal passage guide tube from the superior punctum, and move the lacrimal passage guide tube and the inflatable support sleeve to the anastomotic site, at which time the lacrimal passage guide tube is located near the superior punctum. Insert the L-shaped fixed column end of the punctum fixation plug into the lacrimal passage guide tube, and closely attach the sheet-shaped plug to the skin outside the punctum. Cut off the lacrimal passage guide tube after the lacrimal passage guide tube, and insert the residual end of the lacrimal passage guide tube into the ampulla of the superior punctum. Inject liquid from the tail end of the inflatable support sleeve to make the inflatable support sleeve expand, and observe the expansion process. Push the inflatable support sleeve to make it conform to the shape of the open lacrimal sac, and adjust the position of the inflatable support sleeve under the nasal endoscope.

[0083] Example 2

[0084] The anastomotic site shaping tube used in this example for lacrimal sac-nasal anastomosis is the same as in Example 1.

[0085] In use: dilate the punctum, insert the probe end of the lacrimal passage guide tube from the superior punctum, pass through the common canaliculus, pass the probe end of the lacrimal passage guide tube out of the anastomotic site and pull in the direction of the nasal cavity, when the lacrimal passage guide tube reaches the superior punctum, observe that the number of marking lines between the common canaliculus and the positioning point is 3, i.e. the distance between the common canaliculus and the positioning point is 6 mm, continue to pull the probe until the positioning point on the lacrimal passage guide tube reaches the position of the nasal cavity opening. Insert the probe end into the head end of the inflatable support sleeve, and pull the inflatable support sleeve to a position 3 marking lines past the head end of the inflatable support sleeve, tie a knot at the tail end of the inflatable support sleeve, and cut off the lacrimal passage guide tube after the knot. Pull the lacrimal passage guide tube from the superior punctum, and move the lacrimal passage guide tube and the inflatable support sleeve to the anastomotic site, at which time the lacrimal passage guide tube is located near the superior punctum. Insert the L-shaped fixed column end of the punctum fixation plug into the lacrimal passage guide tube, and closely attach the sheet-shaped plug to the skin outside the punctum. Cut off the lacrimal passage guide tube after the lacrimal passage guide tube, and insert the residual end of the lacrimal passage guide tube into the ampulla of the superior punctum. Inject liquid from the tail end of the inflatable support sleeve to make the inflatable support sleeve expand, and observe the expansion process. Push the inflatable support sleeve to make it conform to the shape of the open lacrimal sac, and adjust the position of the inflatable support sleeve under the nasal endoscope.

[0086] In summary, the anastomotic stoma shaping tube for dacryocystorhinostomy of the present application can accurately control the position of the inflatable support sleeve through the positioning point and the marker line, and the cooperation among the lacrimal passage guide tube, the inflatable support sleeve and the lacrimal point fixing plug enables the inflatable support sleeve 2 to be fixed accurately, effectively solves the problems that the anastomotic stoma of the current endoscopic DCR is easy to close or the scar is easy to proliferate or the shaping is irregular to affect the drainage and cause the recurrence of the disease, the anastomotic stoma shaping tube for dacryocystorhinostomy of the present application is easy to fix, not easy to move, the surface is smooth and does not stimulate the surrounding tissue to produce granulation, and is beneficial to the incision healing. Therefore, the present application effectively overcomes various shortcomings in the prior art and has a high production and utilization value.

[0087] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. An anastomosis stent for dacryocystorhinostomy, characterized by, The application relates to a tear duct guide tube (1) and an inflatable supporting sleeve (2), one end of the tear duct guide tube (1) is fixedly connected with a probe (4), the other end is provided with a tear point fixed plug (3) which can be detachably connected, a positioning point (11) and a fissure (12) are arranged in the middle of the tear duct guide tube (1), the fissure (12) is arranged between the positioning point (11) and the tear point fixed plug (3), a plurality of mark lines (13) are arranged at equal intervals from the positioning point (11) to the fissure (12), the mark lines (13) are suitable for measuring the distance between the tear total pipe and the positioning point (11) and / or the fissure (12), the inflatable supporting sleeve (2) comprises a hollow main shaft (21) and an inflatable layer which is wrapped on the shaft surface of the hollow main shaft (21), the inflatable layer comprises an inflatable sponge layer (22) and a smooth film layer (23), the smooth film layer (23) wraps the inflatable sponge layer (22) on the shaft surface of the hollow main shaft (21), a side hole (24) is arranged on the inflatable layer, the side hole (24) is suitable for injecting liquid into the inflatable sponge layer (22), in the use state, the tear duct guide tube (1) penetrates through the hollow main shaft (21); the tear point fixed plug (3) comprises an L-shaped fixed column body (31) and a sheet type clamping body (32), the L-shaped fixed column body (31) and the sheet type clamping body (32) are integrated, the tear point fixed plug (3) is detachably connected to one end of the tear duct guide tube (1) through the L-shaped fixed column body (31), in the use state, the tear point fixed plug (3) is clamped into the fissure (12) through the L-shaped fixed column body (31).

2. The anastomosis stent for dacryocystorhinostomy according to claim 1, characterized by In the use state, the positioning point (11) positions the relative position of the tear total pipe and the positioning point (11) and / or the fissure (12), the tear point fixed plug (3) is clamped into the fissure (12), and the inflatable supporting sleeve (2) is inflated to support the tear sac nasal anastomosis.

3. The anastomosis forming tube for tear sac nasal anastomosis according to claim 1, wherein The smooth film layer (23) is inflatable silica gel.

4. The anastomosis stent for dacryocystorhinostomy according to claim 1, characterized by The distance between the positioning point (11) and the fissure (12) is 2 cm; And / or, the mark line (13) with a spacing of 2 mm from the positioning point (11) is arranged to a position of 1 cm; And / or, the positioning point (11) is a mark point arranged on the surface of the tear duct guide tube (1); And / or, the fissure (12) is a long strip-shaped crack arranged on the tear duct guide tube (1) along the length direction of the tear duct guide tube (1), and the length of the fissure (12) is the same as the inner diameter of the tear duct guide tube (1).

5. The anastomosis stent for dacryocystorhinostomy according to claim 1, characterized by The end of the L-shaped fixed body (31) connected with the tear duct guide tube (1) is a cylindrical body with a diameter equal to the inner diameter of the tear duct guide tube (1); And / or, the sheet type clamping body (32) is a semi-elliptical flat sheet, which is parallel to the outer surface of the tear duct guide tube (1).

6. The anastomosis stent for lacrimal nasoanastomosis according to claim 1, characterized by The tear duct guide tube (1) is a silica gel hose; And / or, the inflatable supporting sleeve (2) is in the shape of a cone in the inflated state; And / or, the tear point fixed plug (3) is a silica gel plug; And / or, the probe (4) is a stainless steel probe wrapped with a silica gel hose. And / or, the hollow main shaft (21) is a plastic tube; the inner diameter of the hollow main shaft (21) is equal to the outer diameter of the lacrimal passage guide tube (1).

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