CN2039564U

CN2039564U - Cannula type synchronous syringe-suction apparatus for cataract

Info

Publication number: CN2039564U
Application number: CN 88207855
Authority: CN
Inventors: 侯小滨; 李云
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-29
Filing date: 1988-06-29
Publication date: 1989-06-21

Abstract

The utility model relates to a cannula type synchronous syringe-suction apparatus used for treating soft cataract, comprising an outer cannula, an inner tube, an outer jacket needle, an inner needle head, a back cover and a piston. The outer jacket needle head tube chamber and the inner needle head tube chamber are respectively communicated with the outer cannula chamber and the tube chamber of the inner tube. The back site of the inner tube chamber piston is communicated with the outer cannula tube chamber. The utility model is formed by that the inner needle head inhales the cataract cortex, and simultaneously the outer jacket can syringe equivalent water toward the inner eyeball synchronously. The utility model has the advantages of simple structure, convenient operation and no accessories. The damage to the eye tissue is small, because only one jacket needle head is used to draw and suck. The cannula type synchronous syringe-suction apparatus for cataract can also be used in anterior chamber washing techniques, vitreous body replacement techniques, etc.

Description

Cannula type synchronous syringe-suction apparatus for cataract

The synchronous injection aspirator that this utility model uses when belonging to the treatment cortical cataract.

At present, to the treatment of cortical cataract, traditional method is to connect the large size syringe needle cortex sucking-off that cataract half is gelatin with a syringe.Because suction can make eyeball produce negative pressure; cause atrophy of eyeball; so also need water filling inwards; generally need suction; water filling is repeatedly overlapping; till pumping; complicated operation not only, and owing to constantly produce ophthalmic moment negative pressure, eyeball is in shock state; cause eye inner tissue's damage through regular meeting; as: intraocular hemorrhage, detachment of retina, even atrophy of eyeball etc.; relatively good method is that two syringe needles are entered ophthalmic simultaneously; a water filling, a suction, this operation are difficult for synchronously; water inlet can cause negative pressure slowly; water inlet can cause the tolerant loss of ophthalmic impact endurance test shock and ophthalmic too much to make eye inner tissue damage soon again, thus there is the syringe of some treatment cortical cataract to be improved to the report of synchronous injection aspirator in recent years, now for two typical examples:

" the synchronous circulating single tube cataract aspirator of trocar " (Chinese Journal of Ophthalmology, 83 year the 5th phase) see that Fig. 1, this aspirator have adopted a cover sucking-off system.One cover water system is got rid of pipeline in addition, inhales owing to realized synchronous notes, can improve operative status, but shortcoming is that making is cumbersome, complex structure, and operation inconvenience also need be established water systems such as infusion bottle in addition.

2. the synchronous injection aspirator of bidirectional piston bolt cataract (Chinese Journal of Ophthalmology, 86 years the 1st phases) is seen Fig. 2, and this injection aspirator disadvantage is a double needle, and is big to ocular tissue's damage, and operation simultaneously is also inconvenient.

This utility model aims to provide the synchronous injection aspirator of cataract a kind of simple in structure, easy to operate.

For achieving the above object, this utility model adopts sleeve type structure, it is by trocar sheath (5), interior pipe (6), bonnet (7), piston (8), overcoat syringe needle (9), interior syringe needle (10) is formed, pipe (6) is positioned in the tube chamber of trocar sheath (5) wherein, form the mezzanine space that can flow through liquid between outer wall of inner tube and the trocar sheath lumen wall, interior pipe tube chamber afterbody communicates with the trocar sheath tube chamber, interior pipe tube chamber front portion communicates by the tube chamber of the hole on the front end face with interior syringe needle (10), the afterbody of trocar sheath (5) has a bonnet (7), and piston rod (16) passes in the hole from the bonnet.Be slidingly matched with it, it can drive piston (8) and slide in the tube chamber of interior pipe (6), the tube chamber of trocar sheath (5) communicates with the tube chamber of overcoat syringe needle (9) on being positioned on its front end face, overcoat syringe needle tube chamber is passed at the position that interior syringe needle (10) links to each other with the trocar sheath tube chamber by overcoat syringe needle tube chamber, make between the lumen wall of the outer wall of interior syringe needle (10) and overcoat syringe needle (9) and also form the mezzanine space that can flow through liquid, during operation, to overlap syringe needle earlier places in the water container, by handle (11) piston forward is pushed away, form negative pressure in the interior pipe tube chamber at piston rear portion, because it is with the trocar sheath tube chamber, overcoat syringe needle tube chamber communicates again, so liquid is drawn in trocar sheath and the interior pipe tube chamber by overcoat syringe needle tube chamber, to overlap syringe needle again stretches into the anterior chamber and aims at the cataract position, piston is pulled back, at this moment on the one hand interior syringe needle can cataract cortex suck the anterior tube chamber of interior pipe, piston moves backward and original aqueous solution that sucks in interior pipe tube chamber rear portion and the trocar sheath tube chamber can be injected eyeball synchronously by outer syringe needle tube chamber on the other hand, thereby has kept the relatively stable of intraocular pressure.

This utility model can not only reach synchronous notes level, and simple in structure, be easy to make, easy to operate, be that a cover syringe needle enters eyeball simultaneously, little to ocular tissue's damage, this synchronous injection aspirator also can be used for the anterior layer flush operation except that the notes that are used for the cortical cataract operation are inhaled, vitreous replacement, open a jar pot type ECCE, cooperate ultrasonic emulsator, also can be used for the senile cataract enucleation.

Description of drawings:

Fig. 1: the synchronous circulating single tube cataract aspirator principle schematic of trocar.

Fig. 2: the synchronous injection aspirator principle schematic of bidirectional piston bolt cataract.

Fig. 3: the synchronous injection aspirator embodiment of bushing type cataract sketch map.

---trocar sheath 6---interior pipe wherein: 5

7---bonnet 8---piston

The interior syringe needle of 9---overcoat syringe needles 10---

11---handles 12---, two pass joints

13---projection 14---water injection hole

15---inlet hole 16---piston rod

Fig. 3 is this utility model one embodiment, except that inside and outside syringe needle is made of metal, all the other are all with lucite or plastic production, interior pipe (6) outer wall front end face in this example, side and afterbody and afterbody side have some protruding small lugs (13) respectively, they are supported on the outer sleeve inner wall front end face respectively, on side and the bonnet inwall, so that keep certain distance between interior pipe (6) outer wall and outer sleeve inner wall and interior pipe afterbody and the bonnet, formation can be flow through the space of liquid, pipe tube chamber rear portion communicates with the trocar sheath tube chamber in also can making, overcoat syringe needle tube chamber communicates by one two pass joint (12) with the trocar sheath tube chamber, overcoat syringe needle (9) is screwed in two and connects first end, the two pass joint other ends are screwed in trocar sheath (5) front end and wear in the hole of spiral shell button, interior syringe needle (10) is screwed in interior pipe (6) the front end face, interior syringe needle tube chamber communicates with interior pipe tube chamber front portion, the outer warp of interior syringe needle is less than overcoat syringe needle lumen diameter, it passes two pass joints (12) and trocar sheath tube chamber, form mezzanine space, flaring inlet hole (15) is made to enlarge the suction area by interior syringe needle (10) open front place, overcoat syringe needle front opening place and the tubaeform edge of inlet hole (15) kissing connect, its side has two and annotates aperture (14), the hole that piston rod (16) passes on the bonnet is slidingly matched with it, and can drive piston (8) and slide in interior pipe (6) tube chamber.Like this, when operation, will overlap syringe needle earlier and insert in the water container, forward push piston, at this moment because the small lugs (13) on interior pipe (6) outer wall is supported on the trocar sheath front end face respectively, the side, on the bonnet inwall, institute is so that keeping certain clearance between them, make interior pipe (6) tube chamber rear portion and trocar sheath tube chamber, overcoat syringe needle tube chamber communicates, and the negative pressure that the piston rear portion forms can make normal saline suck trocar sheath and interior pipe tube chamber by water injection hole, syringe needle is put into anterior chamber's cataract position again.Pull back piston, the tubaeform inlet hole of interior syringe needle can suck cataract cortex, and interior simultaneously pipe tube chamber piston rear portion is given the normal saline that sucks earlier and also injected eyeball simultaneously.

Claims

1, a kind ofly treats the synchronous injection aspirator that cortical cataract is used.It comprises cover syringe needle, trocar sheath (5), the piston (8) that overcoat syringe needle (9) and interior syringe needle (10) are combined into.Wherein the tube chamber of trocar sheath (5) communicates with overcoat syringe needle tube chamber on being positioned on its front end face.It is characterized in that: establish pipe (6) in the tube chamber of trocar sheath (5).Form the interlayer gap that to flow through liquid between outer wall of inner tube and the trocar sheath lumen wall.The tube chamber rear portion of interior pipe (6) communicates with the trocar sheath tube chamber.Anterior tube chamber by the interior syringe needle (10) thereon of the Kong Yuan on the end face communicates.The trocar sheath afterbody has a bonnet (7).Pass with it in the hole of piston rod (16) from the bonnet and be slidingly matched, can drive piston (8) and in the tube chamber of interior pipe (6), slide.Overcoat syringe needle tube chamber is passed at the position that interior syringe needle (10) links to each other with the trocar sheath tube chamber by overcoat syringe needle tube chamber.Make between the inwall of the outer wall of interior syringe needle (10) and overcoat syringe needle (9) and form the interlayer gap that to flow through liquid.

2, synchronous injection aspirator as claimed in claim 1 is characterized in that: interior pipe (6) outer wall front end face, leading flank outer wall, trailing flank outer wall, afterbody all have the small lugs (13) of suitable protruding 1mm～2mm.Be supported on the tube chamber Inner Front End face of trocar sheath (5), on side and the bonnet inwall.Make and form the interlayer gap that to flow through liquid between them.