EP3496663A1 - Device for preparing a human or animal tissue for corneal grafting - Google Patents
Device for preparing a human or animal tissue for corneal graftingInfo
- Publication number
- EP3496663A1 EP3496663A1 EP18735495.6A EP18735495A EP3496663A1 EP 3496663 A1 EP3496663 A1 EP 3496663A1 EP 18735495 A EP18735495 A EP 18735495A EP 3496663 A1 EP3496663 A1 EP 3496663A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- instrument
- implant
- graft
- channel
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 241001465754 Metazoa Species 0.000 title claims abstract description 14
- 239000007943 implant Substances 0.000 claims abstract description 32
- 238000002360 preparation method Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 235000015097 nutrients Nutrition 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 210000001519 tissue Anatomy 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- 210000002555 descemet membrane Anatomy 0.000 description 12
- 210000004087 cornea Anatomy 0.000 description 9
- 238000002054 transplantation Methods 0.000 description 5
- 230000003511 endothelial effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 210000002889 endothelial cell Anatomy 0.000 description 3
- 210000001585 trabecular meshwork Anatomy 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 208000021921 corneal disease Diseases 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 210000003038 endothelium Anatomy 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 208000034657 Convalescence Diseases 0.000 description 1
- GLNADSQYFUSGOU-GPTZEZBUSA-J Trypan blue Chemical compound [Na+].[Na+].[Na+].[Na+].C1=C(S([O-])(=O)=O)C=C2C=C(S([O-])(=O)=O)C(/N=N/C3=CC=C(C=C3C)C=3C=C(C(=CC=3)\N=N\C=3C(=CC4=CC(=CC(N)=C4C=3O)S([O-])(=O)=O)S([O-])(=O)=O)C)=C(O)C2=C1N GLNADSQYFUSGOU-GPTZEZBUSA-J 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000004045 bowman membrane Anatomy 0.000 description 1
- 235000012745 brilliant blue FCF Nutrition 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 210000000871 endothelium corneal Anatomy 0.000 description 1
- 210000000981 epithelium Anatomy 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
- A61F2/148—Implantation instruments specially adapted therefor
Definitions
- the present invention relates to a device for the preparation of a human or animal tissue for the introduction of a graft or implant, in particular for a keratoplasty, with an instrument having a front end for creating a tunnel in the tissue.
- the present invention relates to a set, in particular disposable set, with a device as described above and a device for storing and transporting a graft or implant, which preferably one with a medium, preferably nutrient medium, can be filled with a container in the container having disposable receiving means for the graft or implant, and / or
- a device for the preparation of a graft or implant from a donor eye a device for the preparation of a graft or implant from a donor eye.
- Transplantation of the human cornea is one of the most common and successful transplant surgery procedures.
- the transplantation of the cornea using all its layers epipithelium, Bowman's membrane, stroma, Descemet's membrane and endothelial cell layer
- epithelium epidermal growth factor
- stroma stroma
- Descemet's membrane and endothelial cell layer have been known for over 100 years.
- Good results are generally obtained with this method of operation, but convalescence is very lengthy and usually a visual recovery can only be achieved after removal of the second suture. This can be up to 18 months after the procedure.
- the classic perforating keratoplasty is now regarded as overtreatment in endothelial corneal diseases, since the sole transplantation of vital endothelial cells is usually sufficient. Therefore, posterior lamellar techniques, especially the DMEK, Descemet Membrane Endothelial Keratoplasty, have become well established as a largely atraumatic alternative for the treatment of endothelial corneal disease.
- the DMEK is limited to the transplantation of the isolated Descemet membrane with the endothelial cells located thereon.
- the graft no longer contains any stromal components and is characterized by a thickness of only about 15 ⁇ .
- a common procedure for preparing a graft or implant is described by Opitz et al., See http://www.egms.de/static/en/meetings/dgii2016/16dgii122. shtml. It is done after inserting the donor graft on a specially made Preparation bench with the endothelium upwards the identification of the iris base. The sharp probing of the trabecular meshwork takes place with a paraclytis lance. Subsequently, a blunt preparation under the Schwalbeline away up to 3 mm into the cornea. With a special cannula, stained medium, for example Medium Trypan Blue 1: 1, can be injected directly into the sub-desceme space. After high-level detachment and subsequent reinvestment of the Descemet membrane, the trepanation is carried out to approximately 7 to 9.5 mm diameter and the usual loading of the DMEK cartridge for implantation.
- the trabecular meshwork is opened and a small tunnel is prepared with a blunt spatula into the cornea.
- a cannula is introduced into this tunnel, with the aid of which a liquid, BSS or dye, is injected, thereby separating the Descemet membrane from the stroma.
- a suitable graft or implant can be carried out, for example, by a device known from WO 2016/095884 A1 for the storage and transport of a graft or implant.
- a device known from WO 2016/095884 A1 for the storage and transport of a graft or implant.
- Such a device has a container that can be filled with a medium, preferably nutrient medium, and a receiving device for the graft or implant that can be arranged in the container.
- the known technique for the preparation of a human or animal tissue for the introduction of a graft or implant is problematic that a variety of instruments must be kept and used to perform a safe preparation.
- a sharp knife is used to access the trabecular meshwork and then a blunt spatula is used to prepare a small tunnel into the cornea, following which a cannula is inserted into the spatula prepared with the spatula to inject a fluid and to separate the Descemet membrane from the stroma.
- the conventional preparation technique is therefore material-consuming and time-consuming due to the required change between several instruments, for example from the knife to the spatula and from the spatula to the cannula.
- the present invention is therefore based on the object of specifying a device of the aforementioned type, according to which a simple and rapid preparation of a human or animal tissue for introduction of a graft or implant is made possible with structurally simple means.
- the above object is achieved by a device having the features of claim 1 and by a set having the features of claim 10. Thereafter, the device according to the invention is configured and further developed such that the instrument is at least partially extending through the instrument to substantially the front end and in the front end at least one opening having channel for supplying and injecting a liquid or gaseous medium to the and in the tissue.
- the instrument is at least partially extending through the instrument to substantially the front end and in the front end at least one opening having channel for supplying and injecting a liquid or gaseous medium to the and in the tissue.
- the instrument with the front end formed to create a tunnel is additionally provided with a suitable channel for supplying and injecting a liquid or gaseous medium to and into the tissue.
- the channel extends at least partially through the instrument to substantially the front end, wherein the channel has at least one opening for discharging the medium in the region of the front end.
- a small tunnel can be prepared in the cornea on the one hand and, on the other hand, with the instrument located in the tissue, inject the required medium into the tissue.
- the provision of two different instruments for these functions and a time-consuming change between different ones for the different functions suitable instruments is no longer required with the device according to the invention.
- the small tunnel in the cornea required for the preparation is produced with the front end of the instrument according to the invention and the injection of a liquid medium, for example, can take place by means of the channel formed in the instrument.
- the front end may be formed dull or sharp and / or flattened and / or spade-shaped.
- the instrument can advantageously replace a knife, for example, at the opening before the preparation of the tunnel.
- the front end may be formed thickened at least in relation to a portion of a remaining body of the instrument.
- the instrument may be at least partially cannula-shaped.
- the medium can be safely guided to the at least one opening in order to be able to be safely injected into the tissue.
- the channel may have a central passage in the instrument with a rear opening preferably arranged centrally in the instrument.
- the medium can thus be guided from the rear opening through the channel to the at least one opening.
- the rear opening may preferably be formed at a rear end of the instrument.
- the at least one opening may be formed in a manner particularly favorable for the separation of the Descemet membrane from the stroma on one side of the instrument.
- This page may have a bottom or top of the be his.
- the side can also be formed by a realized between the top and the bottom side of the range of the instrument. With regard to the specific positioning of the at least one opening, it is possible to focus on the respective application.
- the diameter of the channel and / or the diameter of the at least one opening and / or the diameter of the rear opening can be realized in such a way that in a flow of the medium in a feed or directed towards the front end Injection creates a pressure and / or a jet stream is formed from the at least one opening.
- the Descemet membrane can be safely separated from the stroma.
- the diameter of the channel in the feed or injection direction in particular in a front region near the front end, may decrease continuously, in order to allow such pressure build-up and / or jet stream to occur during the flow of the medium.
- the diameter of the at least one opening could be smaller than the diameter of the channel to allow this pressure build-up or this generation of a jet stream.
- the instrument may have a curved shape.
- the instrument can be made of a resterilizable material, preferably of metal, in order to allow multiple use of the device.
- the instrument may be manufactured for single use, so that the preparation of a resterilisierbaren material is not required.
- the instrument at a rear end with a handle - preferably on and coupled - be connected.
- handles of different sizes and shapes can be used with the same type of instrument, depending on the user's preference.
- the handle can be realized for multiple use be used, with only disposable instruments are used.
- the handle for supplying the medium can be formed in the channel and for this purpose have suitable channels or lines which can be coupled to the channel of the instrument or a rear opening of the instrument.
- the device according to the invention can be provided in the form of a set, in particular disposable sets, wherein such a set as described above apparatus for preparing a human or animal tissue for insertion of a graft or implant and a device for storage and for transporting a graft or implant and / or a device for injecting a graft or implant into a receiver eye and / or a device for preparing a graft or implant from a donor eye.
- the device for storing and transporting a graft or implant can have a container that can be filled with a medium, preferably nutrient medium, with a receiving device for the graft or implant that can be arranged in the container.
- FIG. 1 is a schematic side view of an embodiment of a device according to the invention for the preparation of a human or animal tissue for introduction of a graft or
- FIG. 1 shows a side view of a device according to the invention for the preparation of a human or animal tissue for the introduction of a graft or implant.
- This embodiment is particularly suitable for keratoplasty and has an instrument 1 with a front end 2 for creating a tunnel in the tissue.
- the front end 2 is dull and flattened and thickened with respect to the rest of the body of the instrument 1.
- One could also call the front end 2 involve-shaped.
- the instrument 1 has a channel 3 for supplying and injecting a liquid or gaseous medium to and into the tissue.
- the channel 3 extends along the entire instrument 1 substantially to the front end 2, wherein the channel 3 in the region of the front end 2 has an opening 4 for discharging the guided through the channel 3 medium.
- the instrument 1 is substantially cannula-shaped with an elongated thin body.
- the instrument 1 is connected to a handle 6 and decoupled connected.
- the handle 6 is designed to supply the medium into the channel 3 and for this purpose has at least one suitable channel or a suitable line.
- the channel 3 has in concrete a central passage 7 in the instrument 1 with a centrally arranged - not shown here - rear opening at the rear end 5 of the instrument 1.
- the instrument 1 has a substantially curved shape, wherein a first portion of the instrument 1 on the handle 6 is initially rectilinear. The adjoining the first section curved portion of the instrument 1 is angled to the first section. This bend facilitates the handling of the instrument 1 in a preparation.
- FIG. 2 shows an enlarged bottom view and in an enlarged sectional view of the front end 2 of the instrument 1.
- the lateral arrangement of the opening 4 is realized on the underside particularly recognizable.
- the flattened and slightly widened design of the front end 2 well recognizable.
- the channel 3 shows the arrangement of the channel 3 with the opening 4 extending at a right angle to the channel 3.
- the channel 3 is formed as a central passage 7 in the instrument 1.
- Fig. 3 shows a second embodiment of a device according to the invention, wherein the embodiment in the lower part of Fig. 3 in a plan view - left - and on the other hand a side view - right - is shown.
- the front area of the exemplary embodiment is shown - on the one hand in a sectional representation and on the other hand in a side view.
- the second exemplary embodiment substantially corresponds to the first exemplary embodiment, with the exception that in the region of the front end 2 two laterally formed openings 4 are realized in side regions of the front end 2 of the instrument 1, wherein the openings 4 are formed starting from the channel 3 in opposite directions and aligned. Consequently, in order to avoid repetition, reference may be made to the description of the first exemplary embodiment, wherein the same reference numerals designate the same components. It should be expressly mentioned at this point that the number and positioning of the openings 4 can be adapted to the respective application, as long as the openings 4 are formed in the region of the front end 2. With the device according to the invention a simplification of the conventional preparation technique is achieved.
- the device according to the invention may also be referred to as a "DMEK spatula cannula", since it fulfills both the function of a spatula and that of a cannula.
- the design of the instrument 1 permits both the preparation of a tunnel and the high-speed spraying of the lamellae, ie the separation of Descemet membrane and stroma - with a suitable fluid following the tunnel preparation, eliminating the need to replace an instrument during the preparation procedure, resulting in a simplification of the preparation technique, in which the spatula and cannula are combined in one instrument 1.
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017209202.5A DE102017209202A1 (en) | 2017-05-31 | 2017-05-31 | Device for the preparation of a human or animal tissue for the introduction of a graft or implant |
PCT/DE2018/200046 WO2018219413A1 (en) | 2017-05-31 | 2018-05-14 | Device for preparing a human or animal tissue for corneal grafting |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3496663A1 true EP3496663A1 (en) | 2019-06-19 |
Family
ID=62791469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18735495.6A Withdrawn EP3496663A1 (en) | 2017-05-31 | 2018-05-14 | Device for preparing a human or animal tissue for corneal grafting |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3496663A1 (en) |
DE (1) | DE102017209202A1 (en) |
WO (1) | WO2018219413A1 (en) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4759746A (en) * | 1987-05-14 | 1988-07-26 | Straus Jeffrey G | Retro-bulbar needle |
JP2003511204A (en) * | 1999-10-21 | 2003-03-25 | アルコン,インコーポレイティド | Tenon drug delivery |
US6358262B1 (en) * | 1999-11-05 | 2002-03-19 | Alcon Universal Ltd. | Lamellar dissecting instrument |
US6802829B2 (en) * | 2001-11-16 | 2004-10-12 | Infinite Vision, Llc | Spray device |
ES2329669T3 (en) * | 2003-04-29 | 2009-11-30 | Medical Technology Transfer Holding B.V. | DEVICES AND METHODS TO PREPARE DESCEMET MEMBRANES. |
EP1981437B1 (en) * | 2006-01-26 | 2016-05-25 | Wake Forest University Health Sciences | Corneal donor disc medical tool |
US20080269771A1 (en) * | 2007-04-26 | 2008-10-30 | Fulcher Samuel F A | Method and apparatus for ophthalmic surgery |
US20080281341A1 (en) * | 2007-05-11 | 2008-11-13 | Ension, Inc. | Apparatus and method for endothelial keratoplasty donor tissue transport and delivery |
WO2016095884A1 (en) | 2014-12-15 | 2016-06-23 | Geuder Ag | Device for supporting and transporting a graft or implant |
-
2017
- 2017-05-31 DE DE102017209202.5A patent/DE102017209202A1/en active Pending
-
2018
- 2018-05-14 WO PCT/DE2018/200046 patent/WO2018219413A1/en unknown
- 2018-05-14 EP EP18735495.6A patent/EP3496663A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018219413A1 (en) | 2018-12-06 |
DE102017209202A1 (en) | 2018-12-06 |
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