WO2023169841A1 - Injecteur à coussinet doté de tige extensible - Google Patents

Injecteur à coussinet doté de tige extensible Download PDF

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Publication number
WO2023169841A1
WO2023169841A1 PCT/EP2023/054712 EP2023054712W WO2023169841A1 WO 2023169841 A1 WO2023169841 A1 WO 2023169841A1 EP 2023054712 W EP2023054712 W EP 2023054712W WO 2023169841 A1 WO2023169841 A1 WO 2023169841A1
Authority
WO
WIPO (PCT)
Prior art keywords
injector
shaft
cushion
plunger
opening
Prior art date
Application number
PCT/EP2023/054712
Other languages
German (de)
English (en)
Inventor
Jakob JASTRAM
Original Assignee
Carl Zeiss Meditec 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
Application filed by Carl Zeiss Meditec Ag filed Critical Carl Zeiss Meditec Ag
Publication of WO2023169841A1 publication Critical patent/WO2023169841A1/fr

Links

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
    • 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
    • A61F2/16—Intraocular lenses
    • A61F2/1662—Instruments for inserting intraocular lenses into the eye
    • A61F2/167—Instruments for inserting intraocular lenses into the eye with pushable plungers

Definitions

  • the invention relates to an injector for inserting an intraocular lens into the capsular bag of an eye.
  • a conventional injector for inserting an intraocular lens into the capsular bag of an eye has a tip intended to be inserted into the capsular bag via an incision in the eye.
  • the intraocular lens is folded in the injector so that it can be pushed through the tip into the capsular bag.
  • such an injector can have a cushion that is placed on the tip of a plunger of the injector. The cushion is used to establish contact with the intraocular lens. The more the plunger is pushed forward, the tighter it becomes at the injector tip, the more the intraocular lens is folded, and the more force a surgeon has to apply to move the plunger.
  • WO 2007/097 221 Al discloses an introducer for an intraocular lens.
  • DE 10 2008 037 697 Al concerns one Device for implanting an intraocular lens into an eye.
  • the object of the invention is therefore to create an injector for inserting an intraocular lens into the capsular bag of an eye, in which the risk that parts of the injector remain in the eye is low.
  • the injector according to the invention for inserting an intraocular lens into the capsular bag of an eye has an injector body which has a tip with an opening, a plunger which is displaceably arranged in a longitudinal direction of the injector in the injector body, and a cushion which is arranged in the longitudinal direction between the opening and the plunger.
  • the cushion also includes a shaft adapted to be attached to the injector body and having a rest position in which the shaft is unstretched, the shaft being extensible such that the cushion is subject to an increase in mechanical tension of the shaft in a fastened state with the injector body can be moved from the rest position to the opening, the plunger being set up to push the cushion from the rest position to the opening by moving the plunger in the longitudinal direction towards the opening .
  • the plunger In order to move the cushion and thus also the intraocular lens towards the opening, the plunger must be moved in the longitudinal direction towards the opening. This can be done, for example, by hand or using a motor. As soon as the shaft is pushed out of the rest position, the shaft is stretched and the tensile stress of the shaft increases continuously, which means that a force for moving the plunger must also be continuously increased. The intraocular lens is folded and squeezed through the tip. The force required to move the plunger drops abruptly as soon as the intraocular lens has been pushed out of the opening. Because the cushion is attached to the injector body by means of the shaft, the cushion cannot move detach from the injector body and therefore do not remain in the capsular bag. This means that the risk of parts remaining in the injector is low. The force for moving the plunger can then be reduced or completely eliminated. Due to the tensile stress of the shaft, the cushion shifts towards the rest position of the shaft. Any parts of the cushion that may be located outside the injector retract completely into the injector.
  • the shaft is preferably formed from a material which has an elongation at break according to EN ISO 527 in a range from 50% to 800%, particularly preferably from 200% to 800%, particularly preferably from 200% to 500%.
  • the shaft experiences an extension in the longitudinal direction of at least 30%, in particular at least 50% or at least 100%. It is particularly preferred that the extension is a maximum of 200%, in particular a maximum of 100% or a maximum of 50%.
  • the shaft In the rest position, the shaft is essentially free of mechanical tensile stress. As a result, plastic deformation of the shaft in the rest position can advantageously be avoided.
  • the shaft has a cavity in its interior and the plunger is arranged in the cavity. It is particularly preferred that the shaft has the shape of a tube and the tube delimits the cavity.
  • the injector has a fastening device with a projection that is attached to the injector body, and the shaft has a hook that is attached to the projection and thus attaches the shaft to the injector body.
  • the cushion preferably has a contact part which forms the end of the cushion facing away from the plunger in the longitudinal direction, the contact part being designed to be squeezed when the contact part reaches the tip.
  • the contact part preferably has a hardness in a range of 20 to 40 ShA.
  • the plunger has a pin at its longitudinal end facing the opening in the rest position and the cushion preferably has a cushion recess into which the pin engages. This allows the positions of the plunger and the cushion to be fixed relative to one another in a direction transverse to the longitudinal direction.
  • the shaft preferably has an elastomer, in particular a thermoplastic elastomer.
  • the elastomer preferably has silicone or preferably consists of silicone.
  • the shaft is preferably an injection molded part.
  • the injector preferably has the intraocular lens, which is arranged in the injector body and in the longitudinal direction between the opening and the cushion.
  • the injector has no compression spring, in particular no helical compression spring, the compression spring being set up to bias the plunger in the longitudinal direction away from the opening. This means that the injector advantageously only has a few components.
  • Figure 1 is a perspective view of an injector cut along the longitudinal direction of the injector
  • Figure 2 is a cross-sectional view of a cushion of the injector.
  • an injector 1 for inserting an intraocular lens 5 into the capsular bag of an eye has an injector body 2, a plunger 3 and a cushion 6.
  • the injector body 2 has a tip 4 with an opening 9.
  • the plunger 3 is displaceable in a longitudinal direction 16 of the injector 1 in the injector body 2.
  • the cushion 6 is arranged in the longitudinal direction 16 between the opening 9 and the plunger 3, has a shaft 7 which is attached to the injector body 2, and has a rest position, which is shown in Figure 1, in which the shaft 7 is unstretched is.
  • the shaft 7 is stretchable in such a way that the cushion 6 can be displaced from the rest position to the opening while increasing the mechanical tension of the shaft 7.
  • the plunger 3 is set up to push the cushion 6 from the rest position to the opening 9 by moving the plunger 3 in the longitudinal direction 16 towards the opening 9.
  • the plunger 3 can be set up so that the displacement of the plunger 3 is carried out by hand, and / or the injector 1 can have a drive that is set up to support the displacement of the plunger 3.
  • no device such as a cassette is shown in FIG. 1 with which the intraocular lens 5 can be inserted into the injector 1.
  • the injector 1 can have such a device.
  • the shaft 7 can be formed from a material which has an elongation at break in a range of 50% to 800%.
  • the shaft 7 can experience an extension in the longitudinal direction 16 of at least 30%, in particular at least 50% or at least 100%.
  • the extension can also be a maximum of 200%, in particular a maximum of 100% or a maximum of 50%.
  • the shaft 7 can be essentially free of mechanical tensile stress in the rest position.
  • the shaft 7 can be free of tensile stress.
  • the shaft 7 is not crushed in the rest position and is therefore essentially free or free from a compressive stress directed in the longitudinal direction 16.
  • the tensile stress occurs immediately as soon as the cushion 6 is displaced from the rest position towards the opening 9.
  • Figure 2 shows that the shaft 7 can have a cavity 17 in its interior and the plunger 3 is arranged in the cavity 17.
  • the shaft 7 can have the shape of a tube and the tube can delimit the cavity 17 .
  • the tube can, for example, completely encase the cavity 17 in the circumferential direction with respect to the longitudinal axis 16.
  • Figure 1 shows that the shaft 7 can extend, starting from the longitudinal end of the plunger 3 facing the opening 9 in the rest position, in the longitudinal direction 16 away from the opening 9 at least up to a fastening device 10 of the injector body 2, by means of which the Shaft 7 is attached to the in ector body 2.
  • the fastening device 10 may have a projection 11 that is attached to the injector body 2, and the shaft 7 may have a hook 13 that is attached to the projection 11 and thus attaches the shaft 7 to the injector body 2.
  • a web 12 can be arranged, which protrudes from the projection 11 in a direction away from the opening 9.
  • the hook 13 can be arranged in an area delimited by the projection 11 and the web 12 .
  • the projection 11 can, for example, have the shape of an annular body which extends completely around the plunger 3 in the circumferential direction and enables a ring snap connection to the shaft 7.
  • the web 12 can have the shape of an annular body which extends completely around the plunger 3 in the circumferential direction.
  • the hook 13 can be formed by a first tenon web 18, which protrudes annularly inwardly from the remaining shaft 7 in the radial direction, and a second tenon web, which is annular, which is at the inner end of the in the radial direction first pin web 18 is attached and which protrudes from the first pin web 18 in the direction of the opening 9.
  • the second pin web 19 can be arranged in the area delimited by the projection 11 and the web 12 and in particular abut the first projection 11 .
  • the plunger 3 can have a pin 14 at its longitudinal end facing the opening 9 in the rest position and the cushion 9 can have a cushion recess 15 into which the pin 14 engages.
  • the plunger 3 can have a step, the area from the step to the longitudinal end of the plunger 2 facing the opening 9 in the rest position being formed by the pin.
  • the cushion recess 15 can be a part of the cavity 17 and can in particular be formed by a narrowing of the cavity 17 in the longitudinal direction 16 towards the opening 7.
  • the shaft 7 can have an elastomer, in particular a thermoplastic elastomer.
  • the elastomer can have silicone or consist of silicone.
  • the shaft 7 can be an injection molded part.
  • Figures 1 and 2 show that the cushion 6 can have a contact part 8, which forms the end of the cushion 6 facing away from the plunger 3 in the longitudinal direction 16, the contact part 8 being set up to be squeezed when the contact part 8 is in the tip 4 arrives.
  • Figure 2 shows that in an uncrushed state of the cushion 6, the contact part 8 has a cross section whose normal is parallel to the longitudinal direction 16, and the shaft 7 has a cross section whose normal is parallel to the longitudinal direction 16 and which is larger than that Cross section of the contact part 8 can be.
  • the contact part 8 can, for example, have a hardness in a range of 20 to 40 ShA.
  • Figure 1 shows that the injector 1 can have the intraocular lens 5, which is in the injector body 2 and in the Longitudinal direction 16 is arranged between the opening 9 and the cushion 6.
  • the injector 1 also shows that it is conceivable that the injector 1 does not have a compression spring, which is in particular a helical compression spring, the compression spring being set up to bias the plunger 3 in the longitudinal direction 16 away from the opening 9.
  • a compression spring which is in particular a helical compression spring, the compression spring being set up to bias the plunger 3 in the longitudinal direction 16 away from the opening 9.

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (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

L'invention concerne un injecteur (1) permettant d'introduire une lentille intraoculaire (5) dans le sac capsulaire d'un œil, l'injecteur comprenant un corps (2) d'injecteur comportant une pointe (4) dotée d'une ouverture (9), un piston (3) disposé dans le corps (2) de l'injecteur de façon à pouvoir être déplacé dans une direction longitudinale (16) de l'injecteur (1), et un coussinet (6) disposé dans la direction longitudinale (16) entre l'ouverture (9) et le piston (3), comportant une tige (7) fixée au corps (2) de l'injecteur, et présentant une position de repos dans laquelle la tige (7) n'est pas étendue. La tige (7) peut être étendue de telle façon que, en cas d'augmentation d'une contrainte de traction mécanique de la tige (7), le coussinet (6) peut être déplacé de la position de repos jusqu'à l'ouverture ; le piston (3) est conçu pour pousser le coussinet (6) de la position de repos jusqu'à l'ouverture (9) au moyen d'un déplacement du piston (3) dans la direction longitudinale (16) vers l'ouverture (9).
PCT/EP2023/054712 2022-03-07 2023-02-24 Injecteur à coussinet doté de tige extensible WO2023169841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022105265.6 2022-03-07
DE102022105265.6A DE102022105265B3 (de) 2022-03-07 2022-03-07 Injektor mit einem einen dehnbaren Schaft aufweisenden Kissen

Publications (1)

Publication Number Publication Date
WO2023169841A1 true WO2023169841A1 (fr) 2023-09-14

Family

ID=85382792

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/054712 WO2023169841A1 (fr) 2022-03-07 2023-02-24 Injecteur à coussinet doté de tige extensible

Country Status (2)

Country Link
DE (1) DE102022105265B3 (fr)
WO (1) WO2023169841A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097221A1 (fr) 2006-02-22 2007-08-30 Hoya Corporation outil d'insertion de cristallin artificiel
DE102008037697A1 (de) 2008-08-14 2010-02-18 *Acri.Tec Gmbh Vorrichtung zum Implantieren einer Intraokularlinse in ein Auge
US20130226194A1 (en) * 2010-07-30 2013-08-29 Procornea Holding B.V. Device for inserting an intra-ocular lens
WO2018038691A1 (fr) * 2016-08-24 2018-03-01 Vsy Biyoteknoloji Ve Ilac Sanayi A. S. Coussinet d'injection rétractable pour lentille intraoculaire
DE102020125130B3 (de) * 2020-09-25 2022-01-13 Carl Zeiss Meditec Ag Injektor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007097221A1 (fr) 2006-02-22 2007-08-30 Hoya Corporation outil d'insertion de cristallin artificiel
DE102008037697A1 (de) 2008-08-14 2010-02-18 *Acri.Tec Gmbh Vorrichtung zum Implantieren einer Intraokularlinse in ein Auge
EP2349092A1 (fr) * 2008-08-14 2011-08-03 ACRI.TEC GmbH Dispositif permettant d'implanter une lentille intra-oculaire dans un oeil
US20130226194A1 (en) * 2010-07-30 2013-08-29 Procornea Holding B.V. Device for inserting an intra-ocular lens
WO2018038691A1 (fr) * 2016-08-24 2018-03-01 Vsy Biyoteknoloji Ve Ilac Sanayi A. S. Coussinet d'injection rétractable pour lentille intraoculaire
DE102020125130B3 (de) * 2020-09-25 2022-01-13 Carl Zeiss Meditec Ag Injektor

Also Published As

Publication number Publication date
DE102022105265B3 (de) 2023-04-27

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