CN201279214Y

CN201279214Y - Cornea anterior stroma puncture needle

Info

Publication number: CN201279214Y
Application number: CNU2008200999631U
Authority: CN
Inventors: 谢汉平; 瞿玲辉; 蔡永丰; 李良毛
Original assignee: Third Military Medical University TMMU
Current assignee: Third Military Medical University TMMU
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2009-07-29
Anticipated expiration: 2018-09-11

Abstract

The utility model provides a corneal anterior stroma puncture needle which comprises a needle tube with needle tip; a part I of the needle tube which is 0.1mm to 0.2mm from the needle tip is bent, so that the puncture depth can be conveniently mastered, diseases can be cured, the structure is simple and the cost is low.

Description

Substrate puncture needle before the cornea

Technical field

This utility model belongs to medical apparatus and instruments, is specifically related to the preceding substrate puncture needle of a kind of cornea.

Background technology

Bullous keratopathy (bullous keratopathy) is because a variety of causes is seriously damaged endothelial cell, it is compensatory to cause endothelial cell to lose, make it lose liquid barrier and active liquid pump function, cause the disease of corneal stroma and last subcutaneous persistence edema.For remaining a part of visual function, intraocular pressure normal patient, corneal transplantation is this sick prefered method of treatment.But because corneal material source difficulty has limited carrying out of this operation.Substrate paracentesis treatment bullous keratopathy is a kind of simple before the cornea, economical, effective method, especially recover hopeless for visual function, be not suitable for row corneal transplantation person, and those lack because of cornea source or financial difficulties can't be gone corneal transplantation person, be a kind of simple, economical, the effectively system of selection of pain relieving method and safety, the mechanism of its effect may be after Bowman (bowman's lamina) film penetrates, epithelial cell contacts with the corneal stroma type i collagen, stimulate the new basement membrane of secretion, epithelium and substrate adhesive force are strengthened, and epithelium stretches in people's shallow-layer substrate, when basement membrane is rebuild. temporarily play fixation.The fibrosis of bringing out after the substrate paracentesis before the cornea is also very important to strengthening adhering to of epithelium, the barrier new just as one deck because of its fibrosis cicatrization forms, having hindered aqueous humor advances on the people subcutaneous, the cornea bulla can fade away, and its fibrosis has realized isolating with corneal nerve, thereby has reduced corneal sensation and pain.

The basic step of substrate puncture method is before the cornea: after the topical anesthesia, with a disposable aspiration needle, pass the vertical cornea substrate that enters with anterior elastic membrane of loose epithelial layer and carry out multiple spot puncture, about 1/4 corneal thickness of the degree of depth under slit lamp.The thorn dot density is 2～3/mm ², amount to 150～200 points of puncture.Cornea translucent areas with no bulla pathological changes in the limbus of corneae portion wide zone of 1mm does not puncture, and exempts to cause cornea to remove trace and forms too much.

Substrate puncture needle before the present cornea, usually use No. 24 syringe needles, No. 4.5 or No. 4 common syringe needles such as entry needle, in the art as acupuncture strength excessive acupuncture cross deeply and can cause perforation of cornea, if the direction of acupuncture is not bordering on vertical with the cornea face or strength kicks the beam, it is not enough to thrust the degree of depth, does not then reach the purpose of treatment.

The utility model content

In view of this, in order to address the above problem, this utility model provides a kind of cornea preceding substrate puncture needle, can reach the suitable degree of depth of thrusting easily.

The purpose of this utility model is achieved in that the preceding substrate puncture needle of cornea, comprises the needle tubing with needle tip, and described needle tubing has a bending I apart from needle tip 0.1-0.2 millimeter place.

Further, described bending I is 0.1 millimeter apart from the distance of needle tip.

Further, bend II in addition between described bending I and the needle stand, the axis of needle point is parallel with the needle tubing main shaft and at a distance of the 3-5 millimeter, needle point is towards front end;

Further, the distance of the axis of needle point and needle tubing main shaft is 4 millimeters;

Further, bending I is 90 ° with bending II angle bending;

Further, the internal diameter of described needle tubing is 0.15 millimeter, and external diameter is 0.3 millimeter;

Further, the needle point basil is the long angle of chamfer;

Further, the inclined-plane of the described needle point basil is outside with respect to the needle tubing main shaft;

Further, described needle tubing tube wall is normal wall.

Substrate puncture needle before the cornea of the present utility model, there is a bending at the place at distance needle point 0.1-0.2 millimeter, can grasp the degree of depth of thrusting easily, reaches the purpose of treatment, and is simple in structure, with low cost.

Other advantages of the present utility model, target, to set forth in the following description to a certain extent with feature, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.Target of the present utility model and other advantages can be by following description, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.

Description of drawings

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing this utility model is described in further detail, wherein:

Accompanying drawing shows the structural representation of this utility model most preferred embodiment.

The specific embodiment

Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.

Referring to accompanying drawing; using specification is that the 30G injection needle is transformed; described injection needle is made up of needle stand, needle tubing 1 and protective sleeve, and the needle stand material is nontoxic macromolecule polypropylene, and the needle tubing material is a rustless steel; the protective sleeve material is plastics; the concrete specification of needle tubing is: 13 millimeters of length, 0.15 millimeter of internal diameter, 0.3 millimeter of external diameter; the tube wall type is RW (a normal wall), and the needle point basil is LB (the long angle of chamfer).Concrete transformation is as follows: needle tubing 1 bending of 30G injection needle is gone out two bendings, bending I 2 is 0.1 millimeter apart from the distance of needle point, bending II 3 is 4 millimeters apart from the distance of bending I 2, bending I 2 and angle opposite with the direction that bends II 3 bendings is 90 °, so that the axis of needle point is parallel with needle tubing 1 main shaft and at a distance of 4 millimeters, described needle tip is towards front end, and the inclined-plane of the described needle point basil is outside with respect to needle tubing 1 main shaft.

The above is a preferred embodiment of the present utility model only, is not limited to this utility model, and obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model this utility model.Like this, if of the present utility model these revise and modification belongs within the scope of this utility model claim and equivalent technologies thereof, then this utility model also is intended to comprise these changes.

Claims

1. substrate puncture needle before the cornea comprises needle stand and the needle tubing (1) with needle tip, and it is characterized in that: described needle tubing (1) has bending I (2) apart from needle tip 0.1-0.2 millimeter place.

2. substrate puncture needle before the cornea according to claim 1 is characterized in that: described bending I (2) is 0.1 millimeter apart from the distance of needle tip.

3. substrate puncture needle before the cornea according to claim 1 is characterized in that: bend II (3) between described bending I (2) and the needle stand in addition, the axis of needle point is parallel with the needle tubing main shaft and at a distance of the 3-5 millimeter, needle point is towards front end.

4. substrate puncture needle before the cornea according to claim 3, it is characterized in that: the distance of the axis of described needle point and needle tubing main shaft is 4 millimeters.

5. substrate puncture needle before the cornea according to claim 3 is characterized in that: bending I is 90 ° with bending II angle bending.

6. according to substrate puncture needle before each described cornea in the claim 1 to 5, it is characterized in that: the internal diameter of described needle tubing (1) is 0.15 millimeter, and external diameter is 0.3 millimeter.

7. according to substrate puncture needle before each described cornea in the claim 1 to 5, it is characterized in that the needle point basil is the long angle of chamfer.

8. substrate puncture needle before the cornea according to claim 7, it is characterized in that: the inclined-plane of the described needle point basil is outside with respect to the needle tubing main shaft.

9. according to substrate puncture needle before each described cornea in the claim 1 to 3, it is characterized in that: described needle tubing (1) tube wall is normal wall.