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NL2010118A - Cornea trephine device. - Google Patents

Cornea trephine device. Download PDF

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Publication number
NL2010118A
NL2010118A NL2010118A NL2010118A NL2010118A NL 2010118 A NL2010118 A NL 2010118A NL 2010118 A NL2010118 A NL 2010118A NL 2010118 A NL2010118 A NL 2010118A NL 2010118 A NL2010118 A NL 2010118A
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NL
Netherlands
Prior art keywords
cutting blade
blade
depth
cornea
cylindrical
Prior art date
Application number
NL2010118A
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Dutch (nl)
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NL2010118C2 (en
Inventor
Horng-Ji Lai
Chien-Cheng Lin
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Body Organ Biomedical Corp
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Publication of NL2010118A publication Critical patent/NL2010118A/en
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Publication of NL2010118C2 publication Critical patent/NL2010118C2/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/3205—Excision instruments
    • A61B17/32053—Punch like cutting instruments, e.g. using a cylindrical or oval knife
    • 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
    • A61F9/013—Instruments for compensation of ocular refraction ; Instruments for use in cornea removal, for reshaping or performing incisions in the cornea
    • A61F9/0133—Knives or scalpels specially adapted therefor

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)
  • Eye Examination Apparatus (AREA)

Description

Title: Cornea trephine device
The invention relates to a cornea trephine device, more particularly to a cornea trephine device including a cutting blade mounted rotatably on an annular depth-cutting blade.
Fig. 1 illustrates a conventional cornea trephine device 1 that includes a cylindrical support 11, a cylindrical cutting member 12, and a plurality of pads 13 provided on a bottom peripheral end of the cylindrical support 11. The cylindrical support 11 has an inner surface 112 formed with an inner thread 111, and defines an accommodating space 113 therein. The cylindrical cutting member 12 extends into the accommodating space 113 and has an outer thread 122 that engages threadedly the inner thread 111, and an annular depth-cutting blade 121. In operation, the cylindrical cutting member 12 is rotated relative to the cylindrical support 11 until the depth-cutting blade 121 is disposed outwardly of the accommodating space 113, followed by placing the pads 13 on a cornea 100 of an eye and then cutting the cornea 100 using the depth-cutting blade 121 to form a circular incision with a depth (H). The circular incision surrounds a tissue-removing region 101 on the cornea 100 that is to be removed. After formation of the circular incision, the tissue-removing region 101 of the cornea 100 is removed from the cornea 100 by cutting laterally using another device, such as scissors (not shown). However, changing to another device is inconvenient.
Therefore, an object of the present invention is to provide a cornea trephine device that can overcome the aforesaid drawback associated with the prior art.
According to this invention, there is provided a cornea trephine device that comprises: a blade-mounting seat; a cylindrical cutting mechanism mounted on the blade-mounting seat and movable relative to the blade-mounting seat along a central axis, the cylindrical cutting mechanism having an annular depth-cutting blade, the depth-cutting blade having an inner surface that defines a lower chamber, and being formed with an inner groove indented from the inner surface; and a tissue-removing mechanism mounted rotatably on the cylindrical cutting mechanism and having a cutting blade that is disposed at the depth-cutting blade. The cutting blade is rotatable in the lower chamber relative to the depth-cutting blade about an axis parallel to the central axis. The cutting blade is received in and extends curvedly along the inner groove when the cutting blade is disposed at a first angular position, and extends out of the inner groove and into the lower chamber when the cutting blade is moved from the first angular position to a second angular position.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:
Fig. 1 is a sectional view of a conventional cornea trephine device;
Fig. 2 is an exploded schematic sectional view of the first preferred embodiment of a cornea trephine device according to the present invention;
Fig. 3 is a sectional view, illustrating a state where a cylindrical cutting mechanism of the cornea trephine device of the first preferred embodiment is disposed at a first position;
Fig. 4 is a sectional view illustrating another state where the cylindrical cutting mechanism of the cornea trephine device of the first preferred embodiment is disposed at a second position;
Fig. 5 is a sectional view taken along a line V-V in Fig. 3 for illustrating a state where first and second cutting blades are received in an inner groove in the depth-cutting blade of the cornea trephine device of the first preferred embodiment;
Fig. 6 is a sectional view illustrating another state where the first and second cutting blades extend into a lower chamber defined by the depth- cutting blade of the cornea trephine device of the first preferred embodiment;
Fig. 7 is a schematic view illustrating how the cornea trephine device of the first preferred embodiment cuts a tissue-removing region of a cornea of an eye;
Fig. 8 is a sectional view of the second preferred embodiment of a cornea trephine device according to the present invention, illustrating a state where a cylindrical cutting mechanism of the cornea trephine device of the second preferred embodiment is disposed at a first position; and
Fig. 9 is a sectional view illustrating another state where the cylindrical cutting mechanism of the cornea trephine device of the second preferred embodiment is disposed at a second position.
Before the present invention is described in greater detail with reference to the accompanying preferred embodiments, it should be noted herein that like elements are denoted by the same reference numerals throughout the disclosure.
Figs. 2 to 6 illustrate the first preferred embodiment of a cornea trephine device 2 according to the present invention. The cornea trephine device 2 includes a blade-mounting seat 21, a cylindrical cutting mechanism 22 and a tissue-removing mechanism 24.
In this embodiment, the blade-mounting seat 21 is hollow and has first and second ends 211, 212 and a cylindrical inner surface 210 that defines an accommodating space 213 and that is formed with an inner thread 214. The accommodating space 213 extends through the first and second ends 211, 212 of the blade-mounting seat 21.
The cylindrical cutting mechanism 22 has a cylindrical wall 221 and an annular depth-cutting blade 223. The cylindrical wall 221 is mounted to the blade-mounting seat 21, extends into the accommodating space 213, is movable relative to the blade-mounting seat 21 along a central axis (X), and has a top end 2211, an inner surface 2212 that defines an upper chamber 2210, and an outer surface 2213 that is formed with an outer thread 225 engaging threadedly the inner thread 214.
The depth-cutting blade 223 is tapered from the cylindrical wall 221 to point toward a direction parallel to the central axis (X), has an inner surface 2231 that defines a lower chamber 2230, and is formed with an annular inner groove 2233 indented from the inner surface 2231 and extending circumferentially relative to the central axis (X).
The cylindrical cutting mechanism 22 is movable relative to the blade-mounting seat 21 along the central axis (X) between a first position (see Fig. 3), in which the depth-cutting blade 223 is disposed in the accommodating space 213, and a second position (see Fig. 4), in which the depth-cutting blade 223 is disposed outwardly of the accommodating space 213.
The tissue-removing mechanism 24 is mounted rotatably on the cylindrical cutting mechanism 22, and has first and second cutting blades 244a, 244b rotatable relative to the depth-cutting blade 223, and first and second pivot shafts 241a, 241b connected to the first and second cutting blades 244a, 244b, respectively.
The first cutting blade 244a points toward a transverse direction transverse to the central axis (X), is disposed at the depth-cutting blade 223, and is rotatable in the lower chamber 2230 relative to the depth-cutting blade 223 about a first axis (LI) of the first pivot shaft 241a. The first axis (LI) is parallel to the central axis (X). The second cutting blade 244b points toward the transverse direction, is disposed at the depth-cutting blade 223 opposite to the first cutting blade 244a, and is rotatable in the lower chamber 2230 relative to the depth-cutting blade 223 about a second axis (L2) of the second pivot shaft 241b. The second axis (L2) is parallel to the central axis (X).
In this embodiment, the first and second cutting blades 244a, 244b are received in and extend curvedly along the inner groove 2233 when the first and second cutting blades 244a, 244b are disposed respectively at first and third angular positions (see Fig. 5), and extend out of the inner groove 2233 and into the lower chamber 2230 when the first and second cutting blades 244a, 244b are moved from the first and third angular positions to second and fourth angular positions (see Fig. 6), respectively. Free ends of the first and second cutting blades 244a, 244b meet each other at the central axis (X) when the first and second cutting blades 244a, 244b are disposed respectively at the second and fourth angular positions.
The depth-cutting blade 223 and the cylindrical wall 221 are formed as a single piece. The single piece is formed with first and second pivot channels 226a, 226b that are diametrically disposed and that extend from the top end 2211 of the cylindrical wall 221 to the inner groove 2233 in a direction parallel to the central axis (X). The first and second pivot shafts 241a, 241b extend into and along the first and second pivot channels 226a, 226b to the inner groove 2233 to connect with the first and second cutting blades 244a, 244b, respectively, for driving rotation of the first and second cutting blades 244a, 244b relative to the depth-cutting blade 223.
Referring to Fig. 7, in combination with Figs. 2,3 and 6, in operation, the cornea trephine device 2 is placed on a cornea 200 of an eye, followed by vertically cutting the cornea 200 using the depth-cutting blade 223 to form a circular incision on the cornea 200 that surrounds a tissue-removing region 201 of the cornea 200 to be removed, and then by transversely cutting the tissue-removing region 201 in the transverse direction using the first and second cutting blades 244a, 244b by rotation of the first and second cutting blades 244a, 244b about the first and second axes (LI, L2), respectively. Since the transverse cutting by the first and second cutting blades 244a, 244b cannot at one time cut through an entire area of the tissue-removing region 201, repeated operations of rotating the cornea trephine device 2 relative to the cornea 200 by an angular angle and laterally cutting the tissue-removing region 201 using the first and second cutting blades 244a, 244b are performed in order to cut through the entire area of the tissue-removing region 201.
Figs. 8 and 9 illustrate the second preferred embodiment of the cornea trephine device 2 according to the present invention. The cornea trephine device 2 of the second preferred embodiment differs from the previous embodiment in the structures of the blade-mounting seat 21 and the cylindrical cutting mechanism 22. In this embodiment, the blademounting seat 21 is solid, extends into a space defined by the cylindrical wall 221, and is formed with an outer thread 215, and the cylindrical wall 221 is formed with an inner thread 226 that engages threadedly the outer thread 215. The cylindrical cutting mechanism 22 is movable relative to the blade-mounting seat 21 between a first position (Fig. 8), in which the bottom end 212 of the blade-mounting seat 21 is disposed outwardly of the lower chamber 2230, and a second position (see Fig. 9), in which the bottom end 212 of the blade-mounting seat 21 is disposed in the lower chamber 2230 above the first and second cutting blades 244a, 244b.
With the inclusion of the first and second cutting blades 244a, 244b and the first and second pivot shafts 241a, 241b in the cornea trephine device 2 of the present invention, the aforesaid drawback associated with the prior art can be eliminated.

Claims (8)

1. Een hoornvlies-trepaaninrichting (2) gekenmerkt door: een bladbevestigingszitting (21); een cilindrisch snijmechanisme (22) bevestigd op genoemde bladbevestigingszitting (21) en beweegbaar relatief ten opzichte van genoemde bladbevestigingszitting (21) langs een centrale as (X), waarbij genoemd cilindrisch snijmechanisme (22) een ringvormig diepte-snijblad (223) heeft, waarbij genoemd diepte-snijblad (223) een binnenoppervlak (2231) heeft dat een benedenkamer (2230) definieert, en gevormd is met een binnengroef (2233) ingesprongen van genoemd binnenoppervlak (2231); en een weefsel-verwijdermechanisme (24) roteerbaar bevestigd op genoemd cilindrisch snijmechanisme (22) en met een eerste snijblad (244a) dat is verschaft bij genoemd diepte-snijblad (223); met het kenmerk dat genoemd eerste snijblad (244a) roteerbaar is in genoemde benedenkamer (2230) relatief ten opzichte van genoemd diepte-snijblad (223) om een eerste as (LI) parallel aan genoemde centrale as (X); en met het kenmerk dat genoemd eerste snijblad (244a) wordt ontvangen door, en zich krommend uitstrekt langs, genoemde binnengroef (2233) wanneer genoemd eerste snijblad (244a) zich in een eerste hoekpositie bevindt, en zich uitstrekt vanuit genoemde binnengroef (2233) en in genoemde benedenkamer (2230) wanneer genoemd eerste snijblad (244a) is bewogen van de eerste hoekpositie naar een tweede hoekpositie.A cornea-trepaan device (2) characterized by: a blade mounting seat (21); a cylindrical cutter (22) mounted on said blade attachment seat (21) and movable relative to said blade attachment seat (21) along a central axis (X), said cylindrical cutter mechanism (22) having an annular depth cutter blade (223), wherein said depth cutting blade (223) has an inner surface (2231) defining a lower chamber (2230), and is formed with an inner groove (2233) indented from said inner surface (2231); and a tissue removal mechanism (24) rotatably mounted on said cylindrical cutting mechanism (22) and having a first cutting blade (244a) provided with said depth cutting blade (223); characterized in that said first cutting blade (244a) is rotatable in said lower chamber (2230) relative to said depth cutting blade (223) about a first axis (L1) parallel to said central axis (X); and characterized in that said first cutting blade (244a) is received by, and curves along, said inner groove (2233) when said first cutting blade (244a) is in a first angular position, and extends from said inner groove (2233) and in said lower chamber (2230) when said first cutting blade (244a) has been moved from the first angular position to a second angular position. 2. De hoornvlies-trepaaninrichting (2) volgens conclusie 1, met het kenmerk dat genoemd cilindrisch snijmechanisme (22) verder een cilindrische wand (221) heeft die genoemde centrale as definieert (X), waarbij genoemd diepte-snijblad (223) taps toeloopt van genoemde cilindrische wand (221) in een richting parallel aan genoemde centrale as (X).The cornea trepane device (2) according to claim 1, characterized in that said cylindrical cutting mechanism (22) further has a cylindrical wall (221) defining said central axis (X), said deep cutting blade (223) tapered of said cylindrical wall (221) in a direction parallel to said central axis (X). 3. De hoornvlies-trepaaninrichting (2) volgens conclusie 2, met het kenmerk dat genoemde cilindrische wand (221) een bovenkant (2211) heeft, waarbij genoemd diepte-snijblad (223) en genoemde cilindrische wand (221) gevormd zijn als een enkel stuk, waarbij genoemd enkel stuk gevormd is met een eerste draaikanaal (226a) dat zich uitstrekt van genoemde bovenkant (2211) van genoemde cilindrische wand (221) tot genoemde binnengroef (2233) in een richting parallel aan genoemde centrale as (X), waarbij genoemd weefsel-verwijdermechanisme (24) verder een eerste draaischacht (241a) heeft die zich uitstrekt in en langs genoemd eerste draaikanaal (226a) en die is verbonden met genoemd eerste snijblad (244a) voor het drijven van rotatie van genoemd eerste snijblad (244a) relatief ten opzichte van genoemd diepte-snijblad (223).The cornea trepane device (2) according to claim 2, characterized in that said cylindrical wall (221) has a top (2211), said depth cutting blade (223) and said cylindrical wall (221) being formed as a single piece, wherein said single piece is formed with a first pivot channel (226a) extending from said top (2211) of said cylindrical wall (221) to said inner groove (2233) in a direction parallel to said central axis (X), wherein said tissue removal mechanism (24) further has a first turning shaft (241a) extending into and along said first turning channel (226a) and connected to said first cutting blade (244a) for driving rotation of said first cutting blade (244a) relative to said depth cutting blade (223). 4. De hoornvlies-trepaaninrichting (2) volgens conclusie 2, met het kenmerk dat genoemde bladbevestigingszitting (21) hol is, gevormd is met een inwendige schroefdraad (214) en een opneemruimte (213) daarin definieert, waarbij genoemde cilindrische wand (221) zich uitstrekt in genoemde opneemruimte (213) en gevormd is met een uitwendige schroefdraad (225) die met schroefdraad ingrijpt op genoemde inwendige schroefdraad (214), waarbij genoemd cilindrisch snijmechanisme (22) beweegbaar is relatief ten opzichte van genoemde bladbevestigingszitting(21) tussen een eerste positie, waarin genoemd diepte-snijblad (223) is verschaft in genoemde opneemruimte (213), en een tweede positie, waarin genoemd diepte-snijblad (223) is verschaft buiten genoemde opneemruimte (213).The cornea treadle device (2) according to claim 2, characterized in that said blade attachment seat (21) is hollow, formed with an internal thread (214) and defining a receiving space (213) therein, said cylindrical wall (221) extending into said receiving space (213) and being formed with an external screw thread (225) which engages said internal screw thread (214), said cylindrical cutting mechanism (22) being movable relative to said blade attachment seat (21) between an first position, wherein said depth cutting blade (223) is provided in said receiving space (213), and a second position, wherein said depth cutting blade (223) is provided outside said receiving space (213). 5. De hoornvlies-trepaaninrichting (2) volgens conclusie 2, met het kenmerk dat genoemde bladbevestigingszitting (21) gevormd is met een uitwendige schroefdraad (215) en has een onderzijde (212), genoemde cilindrische wand (221) gevormd is met een inwendige schroefdraad (226) die met schroefdraad ingrijpt op genoemde uitwendige schroefdraad (215), waarbij genoemd cilindrisch snijmechanisme (22) beweegbaar is relatief ten opzichte van genoemde bladbevestigingszitting (21) tussen een eerste positie, waarin genoemde onderzijde (212) van genoemde bladbevestigingszitting (21) is verschaft buiten genoemde benedenkamer (2230), en een tweede positie, waarin genoemde onderzijde (212) van genoemde bladbevestigingszitting (21) is verschaft in genoemde benedenkamer (2230).The cornea trepane device (2) according to claim 2, characterized in that said blade attachment seat (21) is formed with an external thread (215) and has an underside (212), said cylindrical wall (221) is formed with an internal screw thread (226) that engages said external screw thread (215), said cylindrical cutting mechanism (22) being movable relative to said blade attachment seat (21) between a first position, wherein said bottom (212) of said blade attachment seat (21) ) is provided outside said lower chamber (2230), and a second position, wherein said lower side (212) of said blade mounting seat (21) is provided in said lower chamber (2230). 6. De hoornvlies-trepaaninrichting (2) volgens conclusie 3, met het kenmerk dat genoemd weefsel-verwijdermechanisme (24) verder een tweede snijblad (244b) heeft dat is verschaft bij genoemd diepte-snijblad (223) tegenover genoemd eerste snijblad (244a), waarbij genoemd tweede snijblad (244b) roteerbaar is relatief ten opzichte van genoemd diepte-snijblad (223) om een tweede as (L2) parallel aan genoemde centrale as (X) om daarmee te kunnen bewegen in genoemde benedenkamer (2230).The cornea trepane device (2) according to claim 3, characterized in that said tissue removal mechanism (24) further has a second cutting blade (244b) provided at said depth cutting blade (223) opposite said first cutting blade (244a) wherein said second cutting blade (244b) is rotatable relative to said depth cutting blade (223) about a second axis (L2) parallel to said central axis (X) to be able to move therewith in said lower chamber (2230). 7. De hoornvlies-trepaaninrichting (2) volgens conclusie 6, met het kenmerk dat genoemd tweede snijblad (244b) wordt ontvangen door en zich krommend uitstrekt langs genoemde binnengroef (2233) wanneer genoemd tweede snijblad (244b) zich in een derde hoekpositie bevindt, en zich uitstrekt vanuit genoemde binnengroef (2233) en in genoemde benedenkamer (2230) wanneer genoemd tweede snijblad (244b) is bewogen van de derde hoekpositie naar een vierde hoekpositie.The cornea trepane device (2) according to claim 6, characterized in that said second cutting blade (244b) is received by and curves along said inner groove (2233) when said second cutting blade (244b) is in a third angular position, and extending from said inner groove (2233) and into said lower chamber (2230) when said second cutting blade (244b) has been moved from the third angular position to a fourth angular position. 8. De hoornvlies-trepaaninrichting volgens conclusie 7, met het kenmerk dat genoemd enkel stuk van genoemd diepte-snijblad (223) en genoemde cilindrische wand (221) verder is gevormd met een tweede draaikanaal (226b) dat zich uitstrekt van genoemde bovenkant (2211) van genoemde cilindrische wand (221) tot genoemde binnengroef (2233) in een richting parallel aan genoemde centrale as (X), waarbij genoemd weefsel- verwijdermechanisme (24) verder een tweede draaischacht (241b) heeft die zich uitstrekt in en langs genoemd tweede draaikanaal (226b) en die is verbonden met genoemd tweede snijblad (244b) voor het drijven van rotatie van genoemd tweede snijblad (244b) relatief ten opzichte van genoemd diepte-snijblad (223).The cornea trepane device according to claim 7, characterized in that said single piece of said depth cutting blade (223) and said cylindrical wall (221) is further formed with a second turning channel (226b) extending from said top (2211) ) from said cylindrical wall (221) to said inner groove (2233) in a direction parallel to said central axis (X), wherein said tissue removal mechanism (24) further has a second turning shaft (241b) extending in and along said second pivot channel (226b) and connected to said second cutting blade (244b) for driving rotation of said second cutting blade (244b) relative to said depth cutting blade (223).
NL2010118A 2012-01-16 2013-01-14 Cornea trephine device. NL2010118C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW101200962 2012-01-16
TW101200962U TWM434579U (en) 2012-01-16 2012-01-16 Corneal removal apparatus

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NL2010118A true NL2010118A (en) 2013-07-18
NL2010118C2 NL2010118C2 (en) 2014-04-22

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040106939A1 (en) * 1994-01-07 2004-06-03 Mathis Mark L. Device and method for inserting a biocompatible material into the corneal stroma
DE102005004826A1 (en) * 2005-02-02 2006-08-10 Universität Rostock Vacuum trephine for horny skin ablation, has occlusion body and connecting piece designed so that to produce low pressure in hollow space at inner side of housing body on side of disposition body supplied with isotonic saline solution
EP2191799A1 (en) * 2008-11-27 2010-06-02 Philip Douglas Weston Trephine with transparent casing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040106939A1 (en) * 1994-01-07 2004-06-03 Mathis Mark L. Device and method for inserting a biocompatible material into the corneal stroma
DE102005004826A1 (en) * 2005-02-02 2006-08-10 Universität Rostock Vacuum trephine for horny skin ablation, has occlusion body and connecting piece designed so that to produce low pressure in hollow space at inner side of housing body on side of disposition body supplied with isotonic saline solution
EP2191799A1 (en) * 2008-11-27 2010-06-02 Philip Douglas Weston Trephine with transparent casing

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TWM434579U (en) 2012-08-01

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