CN212913541U - Micro-wound punctum dilator - Google Patents
Micro-wound punctum dilator Download PDFInfo
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- CN212913541U CN212913541U CN202021717686.3U CN202021717686U CN212913541U CN 212913541 U CN212913541 U CN 212913541U CN 202021717686 U CN202021717686 U CN 202021717686U CN 212913541 U CN212913541 U CN 212913541U
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- lacrimal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00772—Apparatus for restoration of tear ducts
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Abstract
The invention discloses a minimally invasive punctum dilator, which comprises: a conical head end and an expansion cone; the expansion cone is provided with a large head end and a small head end along the central axis thereof, and the head end of the cone is arranged at the small head end of the expansion cone; the big end of the expansion cone is connected with the inner cylindrical section of the lacrimal punctum sleeve, and the inner cylindrical section of the lacrimal punctum sleeve is connected with the holding part; and a punctal cannula including a punctal cannula wall and a punctal cannula conforming surface; the wall of the lacrimal-point sleeve is sleeved on the inner cylindrical section of the lacrimal-point sleeve; the punctal cannula wall has a punctal cannula-accommodating surface near the dilating conical end. Through the mode, the lacrimal passage cannula is supported in place after the lacrimal passage is expanded, the stability is high, the friction resistance caused by the shrinkage of the lacrimal passage is avoided, the lacrimal passage probe is convenient to pass in and out without resistance, the resistance position is clear when the lacrimal passage is probed, and the blocking position is easy to judge. Meanwhile, the lacrimal punctum is expanded in place in one step as required, so that the lacrimal punctum is not additionally damaged, and the tissue damage is reduced.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a minimally invasive punctum dilator.
Background
The current methods for detecting and treating lacrimal duct obstruction are as follows: lacrimal passage irrigation, lacrimal passage probing, and the like. And lacrimal access typically entails first punctal dilation. The head end of the current punctal dilator is a cone with the diameter of 3-4mm, so that doctors do not know when the punctal dilator is fully dilated when the punctal dilator is used, the dilation can be judged only according to the experience of the doctors, and 2 conditions often occur:
1. the expansion is insufficient, and the tissue damage is increased by repeated expansion, repeated action and operation friction.
2. Over-expansion, resulting in punctal injury and even punctal cleft, affects the tear drainage function.
The size of the lacrimal punctum is 0.2-0.3 mm, and the maximum lacrimal punctum can be expanded by 5 times without damage; so the current conical punctal dilators of 3-4mm diameter inevitably increase the chance of punctal injury; the design of the diameter of 3-4mm instead of 1.0-1.5 mm is because the lacrimal punctum is expanded without damage, and most of the lacrimal punctum is recovered after the dilator is removed (because the fibrous tissue ring around the lacrimal punctum is contracted), so the lacrimal probe and other instruments can not be entered.
A 3-4mm conical punctum dilator is used for carrying out punctum dilation, the dilation is small, and the fibrous tissue ring around the punctum contracts to recover the punctum when the dilator is removed; when the lacrimal punctum is enlarged, the lacrimal punctum can not restore the original state even has crack to affect the diversion of the lacrimal fluid due to certain tissue damage.
Surgery has now fully entered the minimally invasive age, and punctal dilation methods have remained decades ago.
Disclosure of Invention
The invention mainly solves the technical problem of providing a minimally invasive type punctum dilator, which can solve the problem that the size of the punctum dilation can not be controlled as required, so that the punctum dilation can be carried out in one step as required, the punctum is damaged to the minimum extent, and the tissue damage is reduced. Meanwhile, due to the fact that the lacrimal duct is supported by the lacrimal duct sleeve after the lacrimal duct is expanded, the problem that the resistance position judgment caused by lacrimal duct obstruction during probing is influenced by the friction resistance generated by lacrimal duct retraction and lacrimal duct probes is solved.
In order to solve the technical problems, the invention adopts a technical scheme that: providing a minimally invasive punctal dilator; the method comprises the following steps: a punctal dilator comprising a conical tip and a dilating cone; the expansion cone is provided with a large head end and a small head end along the central axis thereof, the cone head end is arranged at the small head end of the expansion cone, and the cone head end is an arc-shaped surface; the big end of the expansion cone is integrally connected with a cylindrical section in the lacrimal punctum sleeve, the cylindrical section in the lacrimal punctum sleeve has an extension direction, and the cylindrical section in the lacrimal punctum sleeve is a cylinder with uniform cross-sectional diameter in the direction vertical to the extension direction; the edge of the cylindrical section in the lacrimal sleeve is connected with the edge of the big end of the expansion cone, and the cylindrical section in the lacrimal sleeve is fixedly connected with a holding part at one end far away from the expansion cone; and
a punctal cannula including a punctal cannula wall and a punctal cannula accommodating surface; the lacrimal point sleeve wall is sleeved on the cylindrical section in the lacrimal point sleeve, and the lacrimal point sleeve wall and the cylindrical section in the lacrimal point sleeve can slide relatively; the punctal cannula wall has the punctal cannula accommodating surface near one end of the expansion cone.
Further, the punctum cannula adaptation surface is an inclined surface, the punctum cannula adaptation surface of the inclined surface is continued in a backward equal inclination manner along the inclination direction of the expansion cone inclined surface, and the front end edge of the punctum cannula adaptation surface is connected with the outer edge of the large end of the expansion cone.
Further, the punctal cannula also includes a structure located at the end distal to the expansion cone and integrally connected to the punctal cannula wall to allow the punctal cannula to pass completely into the lacrimal passage.
Further, the structure of the lacrimal passage preventing sleeve which completely enters the lacrimal passage is a half-ring body of the lacrimal passage sleeve, and one end of the half-ring body of the lacrimal passage sleeve, which is far away from the expansion cone, is integrally connected with the wall of the lacrimal passage sleeve;
the punctal cannula semi-circular body is positioned outside the punctal cannula wall;
the inner cylindrical section of the lacrimal sleeve is fixedly connected with a supporting section of the lacrimal sleeve at one end far away from the expansion cone; the support section of the punctum sleeve is in a circular truncated cone shape or a cylindrical shape;
the outer diameter of one end of the supporting section of the punctum sleeve, which is close to the inner cylindrical section of the punctum sleeve, is consistent with the outer diameter of the semi-circular ring body of the punctum sleeve;
the holding part is fixedly connected with one end of the supporting section of the punctum sleeve, which is far away from the inner cylindrical section of the punctum sleeve.
Further, the surface of the punctal cannula semi-torus is a smooth round blunt surface to prevent damage to surrounding ocular tissue.
Further, a fixing structure is arranged between the punctum sleeve semi-circular ring body and the punctum sleeve supporting section;
the fixation structure can limit relative rotation between the punctal cannula semi-toroidal body and the punctal cannula support section.
Furthermore, the fixing structure comprises a clamping groove arranged on the half-torus of the punctum sleeve and a pin arranged at the head end of the supporting section of the punctum sleeve;
the clamping groove is assembled with the pin correspondingly.
Further, the punctal cannula wall has a thickness of no greater than 0.1 mm.
Furthermore, the head end of the cone is a hemisphere, and the diameter of the hemisphere is 0.2-0.5 mm; under the condition that the lacrimal punctum can be explored, the diameter of the sphere at the head end of the cone can be as large as possible;
the plane end edge of the hemisphere is connected with the small end edge of the expansion cone.
Furthermore, scales are marked on the expansion cone at positions 1mm and 2mm away from the cone head end near the cone head end side, so that the depth of the lacrimal punctum expander entering the lacrimal punctum is identified, and the false tract is reduced.
Further, the outer diameter range of the cylindrical section in the lacrimal punctum sleeve is 0.6-1.2 mm; the inner diameter of the punctal cannula matches the outer diameter of the cylindrical section within the punctal cannula.
The invention has the beneficial effects that: according to the minimally invasive lacrimal dilator, after the lacrimal punctum is dilated, the lacrimal cannula is naturally kept in the lacrimal punctum and the lacrimal canaliculus to support the lacrimal punctum in place, the stability is high, the lacrimal probe can conveniently go in and out without resistance, and operations such as repeatedly pulling and searching the lacrimal punctum are not needed (for example, the lacrimal cannula is not used, when the lacrimal probe is used for probing, the contraction of the lacrimal punctum and the friction with the lacrimal probe generate obvious resistance, so that the blocking position is difficult to accurately judge), so that the resistance position is clear when the lacrimal probe is probed, and the blocking position is easy to judge. Meanwhile, the lacrimal punctum is expanded in place in one step as required, and the lacrimal punctum is not damaged, so that the tissue damage is reduced.
Drawings
Fig. 1 is a schematic perspective view of a minimally invasive punctal dilator according to a preferred embodiment of the invention;
FIG. 2 is one of the exploded schematic views of a preferred embodiment of the minimally invasive punctal dilator of the invention;
FIG. 3 is a second exploded view of a preferred embodiment of the minimally invasive punctal dilator of the invention;
the parts in the drawings are numbered as follows:
1. a conical head end; 2. expanding the cone; 3. a cylindrical section within the punctum cannula; 4. a punctal cannula support section; 5. a grip portion; 31. the punctal cannula wall; 32. punctal cannula compliant surface; 33. a punctal cannula semi-torus; 331. a card slot; 41. a pin.
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 conical head end 1, i.e. the side far away from the holding part 5 is "down" or "head" or "front"; the side close to the grip part 5, i.e. the side away from the conical 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.
Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the present invention includes: punctal dilators and punctal cannulae. The lacrimal dilator is provided with a conical head end 1, the conical head end 1 is a circular arc-shaped surface, a hemisphere is preferable, and the diameter of the sphere is 0.2-0.5 mm; the round blunt end of the hemisphere makes the lacrimal passage where the conical head end 1 contacts difficult to be damaged when the lacrimal point expands, and if the conical head end 1 is sharp, the normal mucosa and other soft tissues are easy to be damaged to cause the formation of iatrogenic false passages. Therefore, under the condition of being capable of exploring the punctum, the diameter of the hemisphere of the conical head end 1 can be as large as possible, so as to reduce the possibility of iatrogenic injury as much as possible.
The rear end of the conical head end 1 of the hemisphere is connected and continued with the front end of the expansion cone 2, the tail end of the expansion cone 2 is integrally connected with a cylindrical section 3 in the lacrimal point sleeve, the cylindrical section 3 in the lacrimal point sleeve has an extension direction, the cylindrical section 3 in the lacrimal point sleeve is a cylinder with the same section diameter size in the direction perpendicular to the extension direction, the edge of the cylinder is directly continued with the expansion cone 2, and the diameter of the cylinder is 0.6-1.2 mm, preferably 0.8mm and 1.0 mm.
The matched lacrimal cannula is sleeved outside the cylindrical section 3 in the lacrimal cannula, and specifically, the lacrimal cannula comprises a lacrimal cannula wall 31, a lacrimal cannula adaptive surface 32 and a lacrimal cannula semi-circular body 33, wherein the lacrimal cannula wall 31 is sleeved on the cylindrical section 3 in the lacrimal cannula, the head end of the lacrimal cannula wall 31 is provided with the lacrimal cannula adaptive surface 32, and the lacrimal cannula adaptive surface 32 is an inclined surface; the inner edge of the front end of the punctal cannula adaptation surface 32 is connected with the outer edge of the tail end of the expansion cone 2, and the punctal cannula adaptation surface 32 continues with equal inclination backwards along the inclination direction of the inclined surface of the expansion cone 2; the end of the punctum cannula wall 31 is integrally connected with a punctum cannula semi-circular body 33, and the punctum cannula semi-circular body 33 is outside the punctum cannula wall, so that the diameter of the inner cavity of the punctum cannula wall 31 is not influenced, and the blunt edge is ensured without damaging the surrounding delicate eye tissues. The main function of the punctal cannula semi-torus 33 is to prevent the punctal cannula from passing completely into the lacrimal canaliculus, which is difficult to remove after surgery.
It is noted that punctal cannula wall 31 has a thickness of no greater than 0.1mm and is as thin as possible while supporting the dilated punctum to minimize additional punctal dilation and tissue damage.
The tail end of the cylindrical section 3 in the lacrimal cannula is expanded and extended to be a supporting section 4 of the lacrimal cannula; the diameter of the head end of the support section 4 of the lacrimal passage is consistent with the outer diameter of the half-circular ring body 33 of the lacrimal passage, and when the lacrimal passage is expanded, the lacrimal passage is pressed by applying force to the lacrimal passage to enter the lacrimal passage, thereby preventing the lacrimal passage from moving backwards and not entering the lacrimal passage.
The support section 4 of the lacrimal-point cannula can be extended to a section of cylinder with the same diameter and then extended to be the holding part 5, or can be directly extended to be the holding part 5 with the same taper angle as the expanding cone 2, the holding part 5 is a cylindrical structure, the design of rough surface increases friction force, and the holding is more stable.
As a preferable scheme of this embodiment, a fixing structure is provided between the half-torus 33 of the punctal cannula at the end of the punctal cannula wall 31 and the head end of the punctal cannula support section 4, specifically, the fixing structure includes a slot 331 opened in the half-torus 33 of the punctal cannula and a pin 41 provided at the head end of the punctal cannula support section 4; the card slot 311 can be fitted correspondingly to the pin 41. When the lacrimal punctum expansion operation is carried out, the lacrimal punctum expander can be driven to rotate and slowly expand to enter the lacrimal punctum, so that whether abnormal resistance exists at the tip or not and even the situation of iatrogenic false canals is easy to perceive.
As another preferable scheme of the embodiment, scales are marked on the side of the expansion cone 2 close to the cone head end 1 and at a distance of 1mm and 2mm from the cone head end for identifying the depth of the lacrimal dilator entering the lacrimal punctum in the vertical eyelid margin lacrimal punctum expansion stage, the vertical section of the lacrimal canaliculus is 1-2 mm, and false canals can be caused when the dilator enters too shallow or too deep and then turns to horizontal continuous expansion, and the scales avoid blindness in the vertical eyelid margin lacrimal punctum expansion stage and prevent the dilator from entering too shallow and too deep so as to reduce false canals in the lacrimal punctum expansion.
The use method of the minimally invasive punctal dilator comprises the following steps:
the assembled minimally invasive lacrimal dilator is pressed into a lacrimal punctum in a direction vertical to an eyelid edge, a scale line of 1mm is covered on the lacrimal punctum, the assembled minimally invasive lacrimal dilator is rotated to be parallel to the eyelid edge when the scale line of 2mm is not covered, a holding part 5 is continuously driven to expand the lacrimal punctum inwards, after the wall 31 of the lacrimal punctum sleeve completely enters the lacrimal punctum, the semi-circular body 33 of the lacrimal punctum sleeve is seen to be in contact with the lacrimal punctum, the lacrimal punctum dilator is pulled out at the moment, the lacrimal punctum sleeve is kept in the lacrimal punctum and the lacrimal canaliculus, and the lacrimal probe with the corresponding type can smoothly enter from the hollow cavity channel of the lacrimal punctum sleeve to probe the.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A minimally invasive punctal dilator, comprising:
a punctal dilator comprising a conical tip and a dilating cone; the expansion cone is provided with a large head end and a small head end along the central axis thereof, the cone head end is arranged at the small head end of the expansion cone, and the cone head end is an arc-shaped surface; the big end of the expansion cone is integrally connected with a cylindrical section in the lacrimal punctum sleeve, the cylindrical section in the lacrimal punctum sleeve has an extension direction, and the cylindrical section in the lacrimal punctum sleeve is a cylinder with uniform cross-sectional diameter in the direction vertical to the extension direction; the edge of the cylindrical section in the lacrimal cannula is connected with the edge of the big end of the expansion cone, and the cylindrical section in the lacrimal cannula is fixedly connected with a holding part at one end far away from the expansion cone; and
a punctal cannula including a punctal cannula wall and a punctal cannula accommodating surface; the lacrimal point sleeve wall is sleeved on the cylindrical section in the lacrimal point sleeve, and the lacrimal point sleeve wall and the cylindrical section in the lacrimal point sleeve can slide relatively; the punctal cannula wall has the punctal cannula accommodating surface near one end of the expansion cone.
2. The minimally invasive punctal dilator of claim 1, wherein: the adaptive surface of the lacrimal passage cannula is an inclined surface, the inclined surface of the adaptive surface of the lacrimal passage cannula is continued along the inclination direction of the inclined surface of the expansion cone with backward equal inclination, and the inner edge of the front end of the adaptive surface of the lacrimal passage cannula is connected with the outer edge of the big end of the expansion cone.
3. The minimally invasive punctal dilator of claim 1, wherein: the punctal cannula also includes a structure located at an end distal to the expansion cone and integrally connected to the punctal cannula wall to completely enter the lacrimal passage.
4. The minimally invasive punctal dilator of claim 3, wherein: the structure of the lacrimal duct preventing sleeve which completely enters the lacrimal passage is a half-ring body of the lacrimal duct sleeve, and the half-ring body of the lacrimal duct sleeve is positioned at one end far away from the expansion cone and is integrally connected with the wall of the lacrimal duct sleeve;
the punctal cannula semi-circular body is positioned outside the punctal cannula wall;
the inner cylindrical section of the lacrimal sleeve is fixedly connected with a supporting section of the lacrimal sleeve at one end far away from the expansion cone; the support section of the punctum sleeve is in a circular truncated cone shape or a cylindrical shape;
the outer diameter of one end of the supporting section of the punctum sleeve, which is close to the inner cylindrical section of the punctum sleeve, is consistent with the outer diameter of the semi-circular ring body of the punctum sleeve;
the holding part is fixedly connected with one end of the supporting section of the punctum sleeve, which is far away from the inner cylindrical section of the punctum sleeve.
5. The minimally invasive punctal dilator of claim 4, wherein: a fixing structure is arranged between the punctum sleeve semi-circular ring body and the punctum sleeve supporting section;
the fixation structure can limit relative rotation between the punctal cannula semi-toroidal body and the punctal cannula support section.
6. The minimally invasive punctal dilator of claim 5, wherein: the fixing structure comprises a clamping groove arranged on the semi-annular body of the punctum sleeve and a pin arranged at the head end of the support section of the punctum sleeve;
the clamping groove is assembled with the pin correspondingly.
7. The minimally invasive punctal dilator of claim 1, wherein: the punctal cannula wall has a thickness of no greater than 0.1 mm.
8. The minimally invasive punctal dilator of claim 1, wherein: the conical head end is a hemisphere, and the diameter of the sphere is 0.2-0.5 mm; the plane end edge of the hemisphere is connected with the small end edge of the expansion cone.
9. The minimally invasive punctal dilator of claim 1, wherein: scales are marked at the positions, close to the end side of the conical head, of the expansion cone, and 1mm and 2mm away from the conical head.
10. The minimally invasive punctal dilator of claim 1, wherein: the diameter range of the cylindrical section in the lacrimal punctum sleeve is 0.6-1.2 mm; the inner diameter of the punctal cannula matches the diameter of the cylindrical section within the punctal cannula.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010492775 | 2020-06-03 | ||
| CN2020104927750 | 2020-06-03 |
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| Publication Number | Publication Date |
|---|---|
| CN212913541U true CN212913541U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021717686.3U Active CN212913541U (en) | 2020-06-03 | 2020-08-18 | Micro-wound punctum dilator |
| CN202010829151.3A Pending CN111821097A (en) | 2020-06-03 | 2020-08-18 | Micro-wound punctum dilator |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202010829151.3A Pending CN111821097A (en) | 2020-06-03 | 2020-08-18 | Micro-wound punctum dilator |
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| CN (2) | CN212913541U (en) |
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- 2020-08-18 CN CN202021717686.3U patent/CN212913541U/en active Active
- 2020-08-18 CN CN202010829151.3A patent/CN111821097A/en active Pending
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| CN111821097A (en) | 2020-10-27 |
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