WO2021098922A1 - Instrument ophtalmologique et enveloppe - Google Patents

Instrument ophtalmologique et enveloppe Download PDF

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Publication number
WO2021098922A1
WO2021098922A1 PCT/DE2020/200103 DE2020200103W WO2021098922A1 WO 2021098922 A1 WO2021098922 A1 WO 2021098922A1 DE 2020200103 W DE2020200103 W DE 2020200103W WO 2021098922 A1 WO2021098922 A1 WO 2021098922A1
Authority
WO
WIPO (PCT)
Prior art keywords
probe
cannula
annular space
sheath
eye
Prior art date
Application number
PCT/DE2020/200103
Other languages
German (de)
English (en)
Inventor
Thorsten Winkler
Hamadi El-Ayari
Original Assignee
Geuder Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Geuder Ag filed Critical Geuder Ag
Publication of WO2021098922A1 publication Critical patent/WO2021098922A1/fr

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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
    • A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments

Definitions

  • the invention relates to an ophthalmological instrument, in particular for performing a hydrodissection and / or a hydrodilation, with a cannula for introducing a liquid into the eye and a, preferably flexible, sheath, the sheath having a base body and an adjoining probe,
  • the probe surrounds the cannula at least in some areas at a small distance, so that an annular space is formed between the sheath and the cannula through which a liquid can be conveyed, with the annular space being flow-connected to the inside of the eye via an access when it is introduced into the eye .
  • the invention also relates to a sleeve for a cannula for performing an ophthalmological procedure.
  • Ophthalmological instruments of the type in question are used, for example, in the surgical treatment of cataracts.
  • a cataract is a clouding of the lens in the eye.
  • the lens is surgically removed from the eye and replaced with an artificial lens.
  • the lens is smashed with an ultrasonic instrument and sucked out of the eye.
  • a cannula is inserted between the lens and the capsular bag and a liquid - for example, saline solution - is injected.
  • the liquid makes it possible to detach the lens from the capsular bag without destroying it.
  • fluid is drained from the eye again when the intraocular pressure increases due to the hydrodissection wave, in order to prevent iris prolapse (iris pushes itself through the incision).
  • An ophthalmological instrument for performing a hydrodissection is described, for example, in WO 2018/178658 A1.
  • the problem with the known device is that the eye is strongly irritated by the introduction of the probe, namely due to the large number of openings that extend over the entire probe.
  • Another problem is that the openings reduce the flexural rigidity of the probe, which makes it more difficult to insert it into the eye. In addition to difficult handling, this also leads to irritation of the eye.
  • the present invention is therefore based on the object of designing and further developing an ophthalmic instrument, in particular for performing a hydrodissection and / or a hydrodilation, of the type mentioned at the beginning, so that simple handling is possible with structurally simple means with reliable drainage of the liquid from the Eye is guaranteed. Furthermore, a cover for an ophthalmological instrument is to be specified.
  • the above object is achieved by the features of claim 1.
  • the ophthalmological instrument in question in particular for performing a hydrodissection and / or a hydrodilation, with a cannula for introducing a liquid into the eye and a sheath, the sheath having a base body and an adjoining probe, wherein the probe surrounds the cannula at least in some areas at a small distance, so that an annular space is formed between the probe and the cannula through which a liquid can be conveyed, the annular space being flow-connected to the inside of the eye via an access when it is introduced into the eye, characterized in that at least one passage which is in flow connection with the annular space is formed as a liquid outlet on the base body.
  • the underlying object can be achieved in an incredibly simple manner by assigning the liquid outlet to the base body.
  • the openings in the probe can thus be dispensed with, so that trauma to the eye is prevented.
  • the bending stiffness increases, so that the instrument is easier to handle for the surgeon. It is always ensured that fluid - for example, to carry out a flydrodissection or hydrodilation - can be introduced into the eye, the annular space ensuring that it is drained from the eye again when the intraocular pressure increases, so that the intraocular pressure remains stable and injuries due to too high or too low intraocular pressure are avoided.
  • cannula is to be understood in the broadest sense. This can be a tubular element of almost any shape through which liquid can be introduced into the eye.
  • the cannula can be pointed and / or sharp at its distal end, an at least substantially blunt distal end being advantageous since the risk of injuring the capsular bag is reduced. It is also possible for the cannula to be made of metal or plastic.
  • the cannula can have any shape, for example curved, straight or angled, with a curved shape being advantageous for performing a hydrodissection or hydrodilation.
  • passages can be formed on the base body. This ensures that sufficient fluid can be drained from the eye. Furthermore, the passages can be arranged in such a way that, even if at least one passage is closed due to the holding of the instrument, liquid can be drained from the other opening (s).
  • the passages can be arranged at the same distance from one another in the circumferential direction, so that the liquid is discharged from the entire annular space.
  • the access can be formed through at least one passage in the side wall of the probe. A defined inflow can thus be set.
  • the distal end of the sheath does not lie firmly against the cannula, so that liquid can flow into the annular space via this access.
  • At least the probe, in particular the entire casing can be formed from a flexible material, for example from silicone. This ensures that the eye is not irritated in the area in which the probe is inserted.
  • a flexible material for example from silicone.
  • the material can be selected and the dimensions of the probe adapted in such a way that the probe is pressed against the cannula by the surrounding tissue, in particular by the sclera, so that the annular space is “closed”.
  • the liquid pushes against the inner wall of the probe with sufficient pressure so that the eye tissue is pushed away and a flow path is released.
  • a valve function can be created by cleverly coordinating the probe material and its geometry.
  • the probe can have a stiffening at least in certain areas, for example by means of struts protruding in the direction of the cannula or a change in the nature of the material, in order to prevent in these areas the probe from being pressed against the cannula by surrounding tissue in such a way that the ring channel is closed.
  • the probe can be designed in such a way that the distal end of the cannula protrudes from the probe.
  • the cannula tip can thus be used for insertion. Another advantage is that, with such a configuration, the positioning of the cannula tip and thus the introduction or injection of liquid can be carried out with greater accuracy.
  • the distal end of the probe can rest against the cannula.
  • a flow connection between the distal end of the probe and the cannula could enter the annular space be prevented.
  • the access into the annular space could be implemented through at least one passage in the probe.
  • connection element can be formed at the proximal end of the cannula.
  • the connection element can serve, for example, to connect the cannula to a tip, a hose connection or the like, through which liquid can be introduced into the eye.
  • the base body could be connectable to the connection element in a form-fitting and / or force-fitting manner.
  • the base body has an internal thread that is matched to a matching external thread on the connection element of the cannula.
  • a sheath for a cannula for performing an ophthalmic procedure is specified, in particular special for performing a hydrodissection and / or a hydrodilation, the sheath having a base body and an adjoining probe, the probe being designed to the cannula with little Distance to surround, so that an annular space is formed between the probe and the cannula, through which a liquid can be conveyed, the annular space being flow-connected to the inside of the eye via an access, and wherein on the base body as a liquid outlet at least one with the annular space in Flow connection standing passage is formed.
  • the handling of the casing can be significantly improved by assigning the liquid outlet to the base body. Furthermore, the occurrence of complications is reduced, since the probe can be introduced into the eye in a particularly simple manner if a large number of openings for realizing the liquid outlet are not formed on the probe.
  • the sheath according to the invention according to claim 11 can have the features mentioned in relation to the sheath of the instrument according to claims 1 to 10.
  • the casing according to claim 11 can be the one in the preceding Description and features explained in the description of the figures and have on parts of the sheath of the instrument according to the invention.
  • FIG. 1 shows a schematic representation of an embodiment of an instrument according to the invention which is connected to a syringe and which is inserted into the eye
  • FIG. 2 shows, in a schematic representation, a sectional view of the instrument according to the invention according to FIG. 1,
  • FIG. 3 shows, in a schematic representation, a further view of the instrument according to the invention according to FIG. 1,
  • FIG. 4 shows, in a schematic representation, a further view of the instrument according to the invention according to FIG. 1,
  • FIG. 5 shows, in a schematic representation, a further view of the instrument according to the invention according to FIG. 1,
  • FIG. 6 shows, in a schematic representation, a further view of the instrument according to the invention according to FIG. 1,
  • FIG. 7 in a schematic representation an enlarged partial view of the
  • FIG. 6 Area A of the illustration of FIG. 6, Fig. 8 in a schematic representation an enlarged partial view of the
  • FIG. 9 shows, in a schematic representation, an exemplary embodiment of a casing according to the invention.
  • the instrument has a cannula 1 and a sheath 2 surrounding the cannula 1.
  • the sheath 2 has a probe 3 and a base body 4.
  • the probe 3 surrounds the cannula 1 in such a way that an annular space 5 is formed in which a liquid can be conveyed.
  • a liquid can be injected into the eye 9 via the cannula 1, for example as part of a flydrodissection.
  • the liquid can be introduced via a syringe 6, for example, as shown in FIG. 1.
  • FIGS. 2 to 9 it can be clearly seen that three passages 7 are formed at the distal end 14 of the probe 3, through which liquid can be introduced into the annular space 5. It should be noted that a single passage 7 can be sufficient. Furthermore, three passages 8 are formed on the base body 4, through which the liquid can escape from the annular space 5. Since the passages 8 are assigned to the base body 4, they do not come into contact with the eye 9 during an intervention, as is shown in FIG. 1. Irritation or injuries to the eye 9 are thus avoided.
  • the probe 3 can also be inserted more easily into the eye 9.
  • a connection element 10 is formed on the proximal end 16 of the cannula 1.
  • connection element 10 is used for connection to an injection device and can have a corresponding connection area 11 for this purpose.
  • connection area 11 is designed as part of a Luer connection.
  • the connection element and the shell also have connecting means 12, 13 that correspond to one another in order to implement a form-fitting and / or force-fitting connection.
  • the connecting means 12, 13 are external threads 12 and internal threads
  • the distal end 14 of the probe 3 rests on the cannula 1, so that no access to the annular space 5 is created.
  • the distal end 14 of the probe 3 runs towards the cannula 1.
  • the inner diameter of the probe 3 is also larger at the distal end 14 than the outer diameter of the cannula 1, so that further access to the annular space 5 is created.
  • the cannula 1 and the probe 3 are curved, as shown in FIGS. 1 to 8.
  • this cannula 1 and the probe 3 can also be implemented straight and / or angled or kinked. Any configurations are conceivable, depending on the requirements of the intervention to be carried out.
  • FIG. 1 A casing 2 according to the invention is shown in FIG. This corresponds to the shell 2 of the exemplary embodiment described in FIGS. 1 to 8, so that reference is made to the preceding description of this exemplary embodiment.

Abstract

L'invention concerne un instrument ophtalmique, destiné en particulier à effectuer une hydrodissection et/ou une hydrodélinéation, qui comporte une canule (1) destinée à introduire un liquide dans l'œil (9) et une enveloppe (2), l'enveloppe (2) présentant un corps de base (4) et une sonde (3) se raccordant dessus, la sonde (3) entourant au moins par endroits la canule (1) avec un faible écart, de sorte qu'un espace annulaire (5) se forme entre la sonde (3) et la canule (1), espace annulaire à travers lequel un fluide peut être refoulé, l'espace annulaire (5) étant relié en écoulement avec l'intérieur de l'œil par l'intermédiaire d'un accès (7), dans l'état introduit du liquide dans l'œil, l'invention se caractérisant en ce qu'un passage (8) en communication d'écoulement avec l'espace annulaire (5) et faisant office de sortie de liquide est ménagé sur le corps de base (4). L'invention concerne en outre une enveloppe (2) pour une canule (1).
PCT/DE2020/200103 2019-11-19 2020-11-19 Instrument ophtalmologique et enveloppe WO2021098922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019217825.1A DE102019217825A1 (de) 2019-11-19 2019-11-19 Ophthalmologisches Instrument und eine Hülle
DE102019217825.1 2019-11-19

Publications (1)

Publication Number Publication Date
WO2021098922A1 true WO2021098922A1 (fr) 2021-05-27

Family

ID=74186406

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2020/200103 WO2021098922A1 (fr) 2019-11-19 2020-11-19 Instrument ophtalmologique et enveloppe

Country Status (2)

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DE (1) DE102019217825A1 (fr)
WO (1) WO2021098922A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012637A1 (de) * 2011-02-28 2012-08-30 Geuder Ag Hülle für ein medizinisches Instrument
WO2018178658A1 (fr) 2017-03-31 2018-10-04 Anant Sharma Dispositifs intraoculaires et procédés associés
DE102018200971A1 (de) * 2018-01-23 2019-07-25 Geuder Ag Hohlnadel für ein augenchirurgisches Instrument und eine die Hohlnadel umgebenden Hülle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29604065U1 (de) * 1996-03-05 1996-05-09 Braun Melsungen Ag Venenverweilkatheter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011012637A1 (de) * 2011-02-28 2012-08-30 Geuder Ag Hülle für ein medizinisches Instrument
WO2018178658A1 (fr) 2017-03-31 2018-10-04 Anant Sharma Dispositifs intraoculaires et procédés associés
DE102018200971A1 (de) * 2018-01-23 2019-07-25 Geuder Ag Hohlnadel für ein augenchirurgisches Instrument und eine die Hohlnadel umgebenden Hülle

Also Published As

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DE102019217825A1 (de) 2021-05-20

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