Small-slot trap type crystal nucleus cutterThis utility model relates to the therapeutic device of ophthalmology, particularly a kind of sickle that is used to extract the cataract crystal nuclear.
Present extracapsular cataract extraction method, the size of its angle Gong Yuan otch depends on the size of crystal nuclear, big its otch of nuclear is just big.And the size of otch is to the direct influence of having corrected defects of vision of postoperative, and otch is big, and scar tissue forms just many, and postoperative causes the probability of corneal astigmatism just big.
Therefore, the small incision cataract extraction method just becomes a direction of ophthalmology worker research, and the most popular both at home and abroad at present small incision cataract extraction method is a supersound method.But this method instrument costs an arm and a leg, and is difficult in the short time popularize.
This utility model provides a kind of little otch snare formula crystal nuclear sickle simple to operate, can will put in order nuclear and cut apart in bulk, and gradation is extractd, and reaches little otch and extracts cataractous purpose.
This utility model is realized by following measure: it is made of shank and crooked cervical region, it is inner for a draw bar is set between the shank of cavity and the cervical region, at the cervical region dead ahead one avette garden ring cover is arranged, its two ends is inserted the cervical region internal diameter and is connected with draw bar one end, has an arc boosting-rod to be hinged between shank hypomere and the draw bar stage casing at the dead ahead of sickle.
This utility model is also realized by following measure: above-mentioned avette garden ring cover is the not closed-loop that the finer wire circle of 0.1～0.5 millimeter of a diameter becomes, and this ring major axis is 5～11 millimeters, and minor axis is 1～5 millimeter; Angle is 96～180 degree between the cervical region of described bending and shank, and cervical region can be made into single tube or two-tube, and the steel wire broken ends of fractured bone that is positioned at the vertical avette garden of cervical region ring cover can be inserted in same pipe or different pipe; Can respectively weld one in the cervical region both sides and be used for dabbling needle tubing, the total diameter of cervical region is 1 to 6 millimeter.
Be described in further detail below in conjunction with embodiment and accompanying drawing thereof.
Fig. 1 is the structural representation according to the little otch snare formula crystal nuclear sickle that the utility model proposes.
As shown in the figure: avette garden ring cover (1) is a core part of the present utility model, is become by 0.1 to 0.5 millimeter finer wire circle, and major axis is 5 to 11 millimeters, and minor axis is 1 to 5 millimeter, entangles 1/4 to 1/2 diameter of nucleus body just.Long 1 to 5 millimeter of cervical region (2) is made with two No. 6 injection needles or No. 10 injection needles.The steel wire broken ends of fractured bone that is positioned at the avette garden ring cover of head inserts needle tubing, joins filling system as needs, can set up each one of No. 7 injection needle in both sides respectively, and the total diameter of cervical region is 1 to 6 millimeter.
Shank (8) is 15 millimeters of external diameters, the hollow garden shape pipe that internal diameter is 8 millimeters, long 100 millimeters.According to the difference of role, can be divided into several partly different from bottom to up.
Shank hypomere and cervical region junction angle are 96～180 degree, window in two sides, can see the connecting portion of draw bar (4) and steel wire, also are convenient to the replacing of snare (1), at an end of the hinged boosting-rod of shank hypomere dead ahead (3).The preceding paragraph of closelying follow is for grasping the position.The segment length is 30 millimeters in the shank, and its dead ahead has groove, and the upper end of being convenient to boosting-rod moves up and down.The upper end of shank epimere built-in spring (6) and draw bar.The shank top has screw (7) to withstand spring, also is convenient to change spring part.
Draw bar (4) is positioned at cervical region and shank, fixedlys connected with two broken ends of fractured bone of avette garden ring cover (1) in its lower end, and the upper end is stretched into the shank epimere and linked to each other with spring by limited block (5), and limited block can prevent that draw bar from excessively falling.Draw bar a section by shank flutes exposes, and the other end of boosting-rod (3) is hinged on this section.During operation, avette garden ring cover stretches into the anterior chamber crystal nuclear is entangled, and forces draw bar to move upward by boosting-rod, drives the top that snare (1) is contracted to cervical region fully, finishes the cutting of nuclear.According to patient's needs, nuclear can be cut into two halves or number half, extract cataractous purpose thereby reach little otch.
Boosting-rod (3) is positioned at the dead ahead of shank, is one arc, is made by rubber-like flat steel, and the lower end is connected in the hypomere of shank, and the upper end is connected on the draw bar of shank stage casing groove, and the junction up and down of boosting-rod is adopted hinged.