EP3197408A1 - Hohlnadel für ein augenchirurgisches instrument - Google Patents
Hohlnadel für ein augenchirurgisches instrumentInfo
- Publication number
- EP3197408A1 EP3197408A1 EP16794507.0A EP16794507A EP3197408A1 EP 3197408 A1 EP3197408 A1 EP 3197408A1 EP 16794507 A EP16794507 A EP 16794507A EP 3197408 A1 EP3197408 A1 EP 3197408A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow needle
- needle according
- axial direction
- active surface
- recesses
- 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- Withdrawn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
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000002604 ultrasonography Methods 0.000 claims abstract description 7
- 238000001727 in vivo Methods 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 238000013467 fragmentation Methods 0.000 abstract description 9
- 238000006062 fragmentation reaction Methods 0.000 abstract description 9
- 239000012634 fragment Substances 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 4
- 208000002177 Cataract Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 206010061876 Obstruction Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 210000002159 anterior chamber Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007748 combinatorial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010025 steaming 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
- 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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015219062.5A DE102015219062A1 (de) | 2015-10-02 | 2015-10-02 | Hohlnadel für ein augenchirurgisches Instrument |
PCT/DE2016/200460 WO2017054821A1 (de) | 2015-10-02 | 2016-09-30 | Hohlnadel für ein augenchirurgisches instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3197408A1 true EP3197408A1 (de) | 2017-08-02 |
Family
ID=57286178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16794507.0A Withdrawn EP3197408A1 (de) | 2015-10-02 | 2016-09-30 | Hohlnadel für ein augenchirurgisches instrument |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3197408A1 (de) |
DE (1) | DE102015219062A1 (de) |
WO (1) | WO2017054821A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017209595A1 (de) * | 2017-06-07 | 2018-12-13 | Geuder Ag | Hohlnadel für ein augenchirurgisches Instrument |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3937222A (en) * | 1973-11-09 | 1976-02-10 | Surgical Design Corporation | Surgical instrument employing cutter means |
WO1996007377A1 (en) * | 1994-09-02 | 1996-03-14 | Oversby Pty. Ltd. | Grooved phaco-emulsification needle |
DE19646881C1 (de) | 1996-11-13 | 1998-08-20 | Volker Geuder | Hohlnadel für ein augenchirurgisches Instrument |
US6165150A (en) * | 1997-12-29 | 2000-12-26 | Surgical Design Corporation | Tips for ultrasonic handpiece |
US20060047254A1 (en) * | 2003-04-04 | 2006-03-02 | Ravi Nallakrishnan | Phacoemulsification needle |
US8403951B2 (en) * | 2005-03-08 | 2013-03-26 | Novartis Ag | Phacoemulsification tip |
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 |
JP2009240622A (ja) * | 2008-03-31 | 2009-10-22 | Hideharu Fukasaku | 超音波乳化吸引術用チップ |
US8118823B2 (en) * | 2008-06-12 | 2012-02-21 | Integra Lifesciences (Ireland) Ltd. | Shear stress ultrasonic horn for ultrasonic surgical aspiration |
US8469981B2 (en) * | 2010-02-11 | 2013-06-25 | Ethicon Endo-Surgery, Inc. | Rotatable cutting implement arrangements for ultrasonic surgical instruments |
WO2013134156A1 (en) * | 2012-03-05 | 2013-09-12 | Wake Forest University Health Sciences | Multi-purpose aspiration/irrigation/polishing tips suitable for cataract surgeries and related methods |
-
2015
- 2015-10-02 DE DE102015219062.5A patent/DE102015219062A1/de not_active Ceased
-
2016
- 2016-09-30 WO PCT/DE2016/200460 patent/WO2017054821A1/de active Application Filing
- 2016-09-30 EP EP16794507.0A patent/EP3197408A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102015219062A1 (de) | 2017-04-06 |
WO2017054821A1 (de) | 2017-04-06 |
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