WO2017054821A1 - Aiguille creuse pour un instrument de chirurgie oculaire - Google Patents

Aiguille creuse pour un instrument de chirurgie oculaire Download PDF

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Publication number
WO2017054821A1
WO2017054821A1 PCT/DE2016/200460 DE2016200460W WO2017054821A1 WO 2017054821 A1 WO2017054821 A1 WO 2017054821A1 DE 2016200460 W DE2016200460 W DE 2016200460W WO 2017054821 A1 WO2017054821 A1 WO 2017054821A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow needle
needle according
axial direction
active surface
recesses
Prior art date
Application number
PCT/DE2016/200460
Other languages
German (de)
English (en)
Inventor
Volker Geuder
Marc Wolschendorf
Stefan Engel
Dieter Frauenfeld
René DRAHEIM
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
Application filed by Geuder Ag filed Critical Geuder Ag
Priority to EP16794507.0A priority Critical patent/EP3197408A1/fr
Publication of WO2017054821A1 publication Critical patent/WO2017054821A1/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
    • A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic

Definitions

  • the invention relates to a hollow needle for an ophthalmological instrument for in vivo disintegration of organic lenses by means of ultrasound, with a connection area formed at the proximal end for coupling to the instrument and a needle end formed at the distal end with an effective surface for emitting ultrasonic waves, wherein a Suction channel for sucking Linsentrümmern extends through the hollow needle, the opening is limited by the active surface.
  • Hollow needles of the type in question are known for years from practice.
  • a corresponding hollow needle is shown in DE 196 468 81 C1.
  • the hollow needle also serves to suck Linsentrümmern through an inner suction channel.
  • the suction channel is formed stepped within the needle head, wherein at least some of these stages prism-shaped incisions to improve the fragmentation of the lens body.
  • the hollow needle comprises a ring-shaped front end, which forms the opening of the suction channel.
  • Ultrasound-operated hollow needles of the generic type are used in cataract surgery in ophthalmic surgery.
  • the free end of the hollow needle is placed in a high-frequency movement and brought directly to the cataract.
  • ultrasonic waves are emitted for emulsification of the tissue.
  • Separated lens debris or lens parts are sucked through the hollow needle together with a rinsing liquid supplied to the eye.
  • the invention is therefore based on the object, a hollow needle for an ophthalmological instrument of the generic type to design and further develop that with structurally simple means at an effective fragmentation of organic lenses secure application is guaranteed.
  • the above object is solved by the features of claim 1.
  • the hollow needle in question for an ophthalmological instrument for in vivo fragmentation of organic lenses by means of ultrasound is characterized in that the outside of the needle head, preferably extending in the axial direction, material recesses and / or at least partially has a rough surface.
  • optimal fragmentation of the lenses is not influenced exclusively by the geometry of the suction channel, but also to a considerable extent by the configuration of the outside of the needle head.
  • the effectiveness of the hollow needle is significantly improved.
  • the radiation of the ultrasonic waves is optimized, so that a rapid disintegration of organic lenses is possible.
  • the outside of the needle head is formed by the outer wall of the needle head and by the active surface.
  • the material recesses may be arranged circumferentially around the entire needle head in order to achieve the largest possible area for emitting the ultrasonic waves.
  • the rough surface is arranged on the entire surface of the outer side of the needle head.
  • the material recesses may be of different lengths, namely taking into account the specific geometry of the needle head.
  • the material recesses may extend as far as the effective region and be chamfered or blunted at the effective region.
  • a chamfered or dull formation has the advantage that the ultrasound-emitting surface is again increased and the emission direction of the ultrasound waves can be controlled. Furthermore, injuries to the surrounding tissue are avoided by this embodiment.
  • the realization of a sharply formed end of the material recesses serves for easier insertion of the hollow needle into the eye and for improved mechanical destruction of the lens tissue.
  • the material recesses may have a round, oval or angular, in particular triangular cross-section.
  • square in the broadest sense is to be understood and includes, for example, a triangle that has no straight but curved side lines.
  • at least one of the material recesses can realize a bypass acting as an opening at the distal end of the needle head.
  • an area of the material recess-in particular on the active surface-can extend in the radial direction from the outside of the needle head to the suction channel, namely in the sense of a passage or a notch. In other words, a further opening can be provided on the active surface in addition to the opening of the active surface.
  • the rough surface can be realized by a diamond coating, in particular on the active surface. As a result, the so-called. Jackhammer effect is increased, which causes an improvement in the crushing performance.
  • the rough surface is produced by etching, steaming, etc.
  • one or more coatings with nanoparticles can be formed on the inner and / or the outer surface of the needle head or on the entire hollow needle.
  • the latter can have two active surface regions which run at different angles with respect to the axial direction, so that the active surface is beak-like overall. Due to the beak-like geometry, an extremely effective and concentrated emission of ultrasonic waves is possible, so that even hard areas of the lens to be smashed, for example a cataract that already exists for a long time, are rapidly destroyed.
  • the suction channel in the needle head at least partially formed tapered in the direction of the proximal end is.
  • the diameter of the suction channel in the needle head extends in the direction of the proximal end, wherein within the suction channel no radially extending steps or edges are present at which lens debris hang and thus clog the suction.
  • the effectiveness of the device can be improved to the effect that the wall of the suction channel - for example, over the entire tapered portion - has axially extending recesses.
  • the recesses may have a circular segment-shaped, angular, in particular triangular, cross-section.
  • angular which also applies to the geometry of the depressions.
  • FIG. 1 is a schematic, perspective view of an embodiment of a hollow needle according to the invention
  • FIG. 2 shows a schematic, frontal view of the hollow needle according to FIG.
  • Fig. 1 shows a schematic, perspective view of an embodiment of a hollow needle according to the invention.
  • a needle head 2 is formed at the distal end 1.
  • the needle head 2 comprises an active surface 3 which delimits a suction channel 4 extending through the hollow needle.
  • the suction channel 4 extends through the entire hollow needle and serves for sucking Linsentrümmern and liquid, which is supplied to the inside of the eye during the procedure.
  • On the outer side 5 of the needle head 2 namely the outer wall 6, extending in the axial direction Materialausappel traditions 7 are formed.
  • the material recesses 7 are provided with a reference numeral in FIG. 1 and the following figures.
  • the outside 5, i. the outer wall 6 or the active surface 3 have a rough surface.
  • the rough surface can be realized advantageously by a diamond coating.
  • the material recesses 7 have a triangular cross-section, wherein two sides of the triangle are formed bent. Furthermore, it can be seen that the active surface 3 has two active surface regions 8, 9. The active surface regions 8, 9 run opposite to the axial direction at different angles, so that the active surface 3 is beak-shaped.
  • the material recesses 7 have a different length, namely due to the beak-like configuration of the active surface 3.
  • the thickness of the wall of the needle head 2 varies in the circumferential direction, thereby varying the radial extent of the active surface 3 in the circumferential direction. Through this constructive measure is the intensity and direction of the radiation of the ultrasonic waves optimally adaptable.
  • Fig. 1 is further shown that in the wall 10 of the suction channel 4 extending in the axial direction recesses 1 1 are formed. Only two of the recesses 1 1 are marked in the figures with a reference numeral.
  • the recesses 11 have a circular segment-shaped cross-section and are positioned in the circumferential direction in such a way that two adjacent recesses 11 meet in the radial direction within a material recess 7.
  • the recesses 1 1 thus take on the triangular cross-section of the material recesses 7.
  • FIG. 2 shows a schematic, frontal view of the hollow needle according to FIG. 1. It can clearly be seen that the suction channel 4 tapers in the needle head 2 in the direction of the proximal end. This design minimizes the risk of obstruction of the hollow needle in a simple and effective manner. To avoid repetition, reference is further made to the description of FIG. 1.
  • FIG. 3 shows a schematic side view of the hollow needle according to FIGS. 1 and 2. It can once again be clearly seen that the material recesses 7 extend as far as the active surface 3 and are of different lengths seen in the axial direction, namely taking into account the beak-like configuration Furthermore, the angle 12 can be seen under which the side edges of the material recesses extend to each other. The material recesses 7 may each have the same angle 12 and thus differ only in their length. With regard to the further description, reference is made to the above explanations to the figures 1 and 2.

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)
  • Surgical Instruments (AREA)

Abstract

Aiguille creuse pour un instrument de chirurgie oculaire, pour la destruction in vivo de lentilles organiques par ultrasons, qui comporte une zone de raccordement formée à son extrémité proximale pour raccorder ladite aiguille à l'instrument, et une tête d'aiguille (2) formée à l'extrémité distale et pourvue d'une surface active (3) destinée à émettre des ondes ultrasonores, un canal d'aspiration (4) pour aspirer des débris de lentille, dont l'ouverture est délimité par la surface active (3), s'étendant à travers l'aiguille creuse. Ladite aiguille creuse est caractérisée en ce que la face extérieure (5) de la tête d'aiguille (2) comporte des évidements de matière (7) s'étendant de préférence dans la direction axiale et/ou présente au moins par endroits une surface rugueuse.
PCT/DE2016/200460 2015-10-02 2016-09-30 Aiguille creuse pour un instrument de chirurgie oculaire WO2017054821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16794507.0A EP3197408A1 (fr) 2015-10-02 2016-09-30 Aiguille creuse pour un instrument de chirurgie oculaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015219062.5 2015-10-02
DE102015219062.5A DE102015219062A1 (de) 2015-10-02 2015-10-02 Hohlnadel für ein augenchirurgisches Instrument

Publications (1)

Publication Number Publication Date
WO2017054821A1 true WO2017054821A1 (fr) 2017-04-06

Family

ID=57286178

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2016/200460 WO2017054821A1 (fr) 2015-10-02 2016-09-30 Aiguille creuse pour un instrument de chirurgie oculaire

Country Status (3)

Country Link
EP (1) EP3197408A1 (fr)
DE (1) DE102015219062A1 (fr)
WO (1) WO2017054821A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017209595A1 (de) * 2017-06-07 2018-12-13 Geuder Ag Hohlnadel für ein augenchirurgisches Instrument

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19646881C1 (de) 1996-11-13 1998-08-20 Volker Geuder Hohlnadel für ein augenchirurgisches Instrument
US5935096A (en) * 1994-09-02 1999-08-10 Oversby Pty Ltd. Grooved phaco-emulsification needle
US20060047254A1 (en) * 2003-04-04 2006-03-02 Ravi Nallakrishnan Phacoemulsification needle
US20080058708A1 (en) * 2005-08-02 2008-03-06 Takayuki Akahoshi Phacoemulsification Needle
US20090192440A1 (en) * 2006-10-13 2009-07-30 Takayuki Akahoshi Shaped Phacoemulsification Needle Tips
US20090312692A1 (en) * 2008-06-12 2009-12-17 Cotter Daniel J Shear stress ultrasonic horn for ultrasonic surgical aspiration
US20110196400A1 (en) * 2010-02-11 2011-08-11 Ethicon Endo-Surgery, Inc. Rotatable cutting implement arrangements for ultrasonic surgical instruments
US20130231605A1 (en) * 2012-03-05 2013-09-05 Wake Forest University Health Sciences Multi-purpose aspiration/irrigation/polishing tips suitable for cataract surgeries and related methods

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937222A (en) * 1973-11-09 1976-02-10 Surgical Design Corporation Surgical instrument employing cutter means
US6165150A (en) * 1997-12-29 2000-12-26 Surgical Design Corporation Tips for ultrasonic handpiece
US8403951B2 (en) * 2005-03-08 2013-03-26 Novartis Ag Phacoemulsification tip
JP2009240622A (ja) * 2008-03-31 2009-10-22 Hideharu Fukasaku 超音波乳化吸引術用チップ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5935096A (en) * 1994-09-02 1999-08-10 Oversby Pty Ltd. Grooved phaco-emulsification needle
DE19646881C1 (de) 1996-11-13 1998-08-20 Volker Geuder Hohlnadel für ein augenchirurgisches Instrument
US20060047254A1 (en) * 2003-04-04 2006-03-02 Ravi Nallakrishnan Phacoemulsification needle
US20080058708A1 (en) * 2005-08-02 2008-03-06 Takayuki Akahoshi Phacoemulsification Needle
US20090192440A1 (en) * 2006-10-13 2009-07-30 Takayuki Akahoshi Shaped Phacoemulsification Needle Tips
US20090312692A1 (en) * 2008-06-12 2009-12-17 Cotter Daniel J Shear stress ultrasonic horn for ultrasonic surgical aspiration
US20110196400A1 (en) * 2010-02-11 2011-08-11 Ethicon Endo-Surgery, Inc. Rotatable cutting implement arrangements for ultrasonic surgical instruments
US20130231605A1 (en) * 2012-03-05 2013-09-05 Wake Forest University Health Sciences Multi-purpose aspiration/irrigation/polishing tips suitable for cataract surgeries and related methods

Also Published As

Publication number Publication date
DE102015219062A1 (de) 2017-04-06
EP3197408A1 (fr) 2017-08-02

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