CN202982371U - Special needle system for injection in vitreous body - Google Patents

Abstract

The utility model relates to the medical instrument field, especially to a special needle system for injection in a vitreous body, and provides a special needle system for injection in an ophthalmic vitreous body. The special needle system is characterized by comprising an injection needle, a needle sleeve and an adjustable fixing holder, wherein the length scale is respectively marked on a needle stem of the injection needle and a needle sleeve, the adjustable fixing holder in cooperation with is needle sleeve vertically fixed on the needle stem. When viewed from the side surface, the adjustable fixing holder is arc and attaches to the surface of an eyeball. A length scale is marked on the fixing holder.

Description

Intravitreal injection special-purpose needle head system

Technical field

This utility model relates to technical field of medical instruments, it is characterized in that in a kind of medical glass body injection special-purpose needle head system.

Background technology

Intravitreal injection is a kind ofly to enter vitreous body through eye orbiculus ciliaris puncture wall of eyeball, and to the technology of intravitreal injection medicine, is mainly used in the treatment of ophthalmics in clinical ophthalmology treatment endophthalmitis, retinopathy, neovascular glaucoma etc.Intravitreal injection has local application, and dosage is few, and medicine directly acts on focus, avoids the advantages such as medicine general reaction.

Intravitreal injection is one of ophthalmology common technology, and is especially significant to the treatment of macular edema and retina choroidal neovascularization disease.Along with the improvement of aged tendency of population and living standard, the age-related macular degeneration, the diabetic retinopathy prevalence that occupy irreversibility diseases causing blindness spectrum front two obviously increase in recent years.The macular edema and the retina choroidal neovascularization that cause for treating such disease, the ophthalmic topical application of novel glucocorticoid and neovascularization inhibitor routinizes increasingly, and intravitreal injection is the unique effective way of topical application except operation in present such pharmaceutical ocular.

Intravitreal injection technical operation guideline recommendation uses length to be the syringe needle of 1/2in (12.7mm)-5/8in (15.875mm) 25G-30G, the adult is 3.5mm-4mm after limbus of corneae, child 2.5mm place after limbus of corneae, thrust eyeball with above-mentioned injection needle, syringe needle vertically points to vitreous chamber central authorities, slowly injects medicinal liquid.But because can't look at injection needle operating process within the eye straight, cause using common syringe needle to have potential risk and inconvenience: common syringe needle enters ophthalmic length and can't quantize and can only artificially estimate, pleasing to the eye length is crossed and is deeply easily caused the offside retina to stab, cross the shallow medicine that causes and be piled up in the front glass body, cause posterior retina focal zone drug level too low and lessen the curative effect, angle, room and crystalline lens place drug level are too high and easily cause the muddy and high intraocular pressure of Drug product body; Injection angles is difficult to quantize and can only artificially estimate, the excessive deviation of angle easily causes crystal and amphiblestroid stabbing; Needle point pinprick position can't be determined, the direction of drug dispersion in the time of can't guaranteeing injectable drug; Per injection needs the special ophthalmology compasses that are equipped with, so that accurate labelling injection position, repeatedly using needs sterilization repeatedly.

Summary of the invention

This utility model provides in a kind of medical glass body injection special-purpose needle head system, can effectively solve conventional needles and be used for the problem that intravitreal injection exists, and improves safety and the accuracy of intravitreal injection.

The technical scheme that its technical problem that solves this utility model adopts is: be comprised of injection needle, pinhead sleeve, adjustable fixedly holder; The upper length scale mark that indicates of entry needle scalp acupuncture stalk; Indicate the length scale mark on pinhead sleeve; Support the use with it adjustable fixedly holder, can vertically be fixed on the pin stalk, curved applying eyeball surface is seen in the side, the upper length scale mark that indicates of fixing holder.

Described syringe needle is the 25G-30G syringe needle, and length is 1/2in (12.7mm)-5/8in (15.875mm).

Described syringe needle from needle point to the pin stalk 6mm place, every 2mm sign scale mark.

There is obvious raised indicia on described pinhead sleeve top, indicates scale mark from center, projection top to needle guard end air line distance 2.5mm, 3.5mm, 4mm place.

The initial folding condition of described adjustable fixedly holder front is " Y " shape, and closed rear state anterior view is rectangular " Shu " shape, and " Y " shape central point is 4mm to fixing holder distal-most end air line distance.

Described adjustable fixedly holder original state is two parts of folding, and width is 1/2 of non-folding part.

Described adjustable fixedly holder original state is two parts of folding, and inboard opposite face is the snap close shape, closely interlock mutually after closure.

Described adjustable fixedly holder original state is the part of non-folding, and part distal-most end air line distance 2.5mm, 3.5mm from " Y " shape central point to non-folding indicate scale mark.

The beneficial effects of the utility model are, with supporting the use of scale pin stalk and fixing holder, guarantee that the operator has namely quantized the effective length that injection needle enters ophthalmic in the preoperative, guaranteed that puncture needle enters when especially injecting after eyeball and vertical angle and the effective depth of wall of eyeball, made simultaneously operator's clear and definite direction of injection needle pinprick under non-direct-view state.Disposable with the supporting the use of scale pinhead sleeve, the step of the ophthalmology compasses apparatus of repeatedly sterilizing when having exempted the intravitreal injection operation has been avoided potential cross infection.

Description of drawings

Below in conjunction with drawings and Examples, this utility model is further illustrated.

Accompanyingdrawing 1 is the supporting pinhead sleeve structural representation of intravitreal injection special-purpose needle head system.

Accompanyingdrawing 2 is the supporting needle head structure schematic diagram of intravitreal injection special-purpose needle head system.

Accompanyingdrawing 3 is the intravitreal injection special-purpose needle head system initial folding condition anterior view of matching used adjustable fixedly holder structural representation with it.

Accompanying drawing 4 is intravitreal injection special-purpose needle head system matching used adjustable fixedly holder closure state anterior view structural representation with it.

Accompanying drawing 5 is that intravitreal injection special-purpose needle head system sees structural representation in matching used adjustable fixedly holder closure state side with it.

Accompanying drawing 6 is for using the front schematic diagram of determining injection position with supporting pinhead sleeve of the intravitreal injection special-purpose needle head interior injection of system's oozy glass body.

Accompanying drawing 7 is the schematic diagram when using the interior injection of intravitreal injection special-purpose needle head system's oozy glass body.

In figure:

1.1 be the obvious raised indicia on pinhead sleeve top.1.2 be the length scale mark on pinhead sleeve.2.1 be the length scale mark on syringe needle pin stalk.3.1 be the length scale mark in adjustable fixedly holder.But 3.2 be the snap close shape of the inboard opposite face of adjustable fixedly holder folding part.

The specific embodiment

Under sterile working's state, before puncturing, the intravitreal injection special-purpose needle head is arranged on syringe, pre-set paracentesis depth (as 8mm), adjustable fixedly holder opening part is set to the pin stalk sets scale place (as 8mm), the snap close (3.2 mark in figure) of the fixing holder of part interlock folding part, fixing holder is attached on the pin stalk, adjust fixedly entrust the scale end be positioned at the needle point pinprick deviate from direction after, the snap close of the fixing holder of interlock folding part, vertically be firmly secured on the pin stalk fixedly holder fully.Mark the point of puncture position with pinhead sleeve (as 4mm after the labelling corneoscleral junction from corneoscleral junction, namely be positioned at corneoscleral junction from center, projection top to needle guard end air line distance 4mm place scale mark), jut (1.1 mark in figure) can stay impression at the point of puncture place.Adjust syringe, make and fixedly entrust the scale end vertically towards corneoscleral junction, make syringe needle pinprick position deviate from corneoscleral junction.In the vertical wall of eyeball puncture of point of puncture, needle point to the pin stalk between fixing holder is entered in eyeball fully, fixedly holder is sticked fully in wall of eyeball, slowly injection of medicine.

Claims (8)

1. an intravitreal injection special-purpose needle head system, is characterized in that: be comprised of injection needle, pinhead sleeve, adjustable fixedly holder; The upper length scale mark that indicates of entry needle scalp acupuncture stalk; Indicate the length scale mark on pinhead sleeve; Support the use with it adjustable fixedly holder, can vertically be fixed on the pin stalk, curved applying eyeball surface is seen in the side, the upper length scale mark that indicates of fixing holder.

2. intravitreal injection special-purpose needle head according to claim 1 system, is characterized in that, syringe needle is the 25G-30G syringe needle, and length is 1/2in-5/8in.

3. intravitreal injection special-purpose needle head according to claim 1 system, is characterized in that, syringe needle from needle point to the pin stalk 6mm place, every 2mm sign scale mark.

4. intravitreal injection special-purpose needle head according to claim 1 system, is characterized in that, there is obvious raised indicia on the pinhead sleeve top, indicates scale mark from center, projection top to needle guard end air line distance 2.5mm, 3.5mm, 4mm place.

5. intravitreal injection special-purpose needle head according to claim 1 system, it is characterized in that, the initial folding condition of adjustable fixedly holder front is " Y " shape, and closed rear state anterior view is rectangular " Shu " shape, and " Y " shape central point is 4mm to fixing holder distal-most end air line distance.

6. intravitreal injection special-purpose needle head according to claim 5 system, is characterized in that, adjustable fixedly holder original state is two parts of folding, and width is 1/2 of non-folding part.

7. intravitreal injection special-purpose needle head according to claim 5 system, is characterized in that, adjustable fixedly holder original state is two parts of folding, and inboard opposite face is the snap close shape, closely interlock mutually after closure.

8. intravitreal injection special-purpose needle head according to claim 5 system, it is characterized in that, adjustable fixedly holder original state is the part of non-folding, and part distal-most end air line distance 2.5mm, 3.5mm from " Y " shape central point to non-folding indicate scale mark.

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