US20040215207A1 - Intraocular lens insertion instrument - Google Patents
Intraocular lens insertion instrument Download PDFInfo
- Publication number
- US20040215207A1 US20040215207A1 US10/326,498 US32649802A US2004215207A1 US 20040215207 A1 US20040215207 A1 US 20040215207A1 US 32649802 A US32649802 A US 32649802A US 2004215207 A1 US2004215207 A1 US 2004215207A1
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- Prior art keywords
- lens
- lumen
- folded
- end portion
- plunger
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- 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
- A61F2/1664—Instruments for inserting intraocular lenses into the eye for manual insertion during surgery, e.g. forceps-like instruments
Definitions
- the present invention addresses problems related to the insertion of an intraocular lens through a small incision in the human eye.
- foldable intraocular lenses have largely replaced hard, rigid lenses, the foldable lens being insertable through an incision of approximately ⁇ fraction (1/2) ⁇ the size of an incision required for rigid lenses.
- a small incision enables more rapid recovery, less discomfort for a patient, and avoids many of the possible adverse complications of cataract surgery. Further, the procedure requires less time because suturing is not required.
- the problems addressed include undesirable rotation of a folded, compressed lens during passage through a lumen or tubular passage, the maintaining of the correct orientation of a lens relative to an insertion instrument, sudden expansion of unfolding of a compressed lens as it exits the insertion instrument into the eye, and difficulty in insertion of a tip of an insertion instrument into a small incision in the eye of a patient.
- Folding forcep devices have been provided for folding flexible lenses, it has generally been preferred by surgeons to utilize insertion devices whereby a lens enters the eye through a tube. Folding forcep devices generally comprise two components in addition to a lens, thus requiring two hands for their utilization.
- the improvements according to the invention include a plunger with stabilizing components thereon to exert forces on a folded lens to maintain the lens in folded configuration and to prevent rotation of the lens relative to a lumen wall.
- One or more slits in the nozzle end portion enable the spreading of the end portion by passage therethrough of the folded lens after insertion in the eye of a patient, thus to provide ease of admission of the folded lens into the eye of a patient.
- Ridges extend longitudinally of the lumen wall to aid in prevention of rotation of a folded lens relative to the lumen wall., these including ridges extending along opposite edges of at least one slit in the nozzle end portion of the insertion instrument to aid in the prevention of rotation of a folded lens relative to the lumen wall.
- FIG. 1 is an exploded perspective view of an insertion instrument of the present invention showing its receptacle actuator, tubular portion and nozzle;
- FIGS. 2 and 3 are sectional views of the instrument of FIG. 1, showing a Lens optic and haptics in folded configuration in the lumen with the nozzle tip inserted through an incision in the eye of a patient;
- FIG. 4 is an enlarged fragmentary view of the nozzle portion, showing the nozzle tip portion inserted via an incision in the eye of the patient, and the lens expanding within the eye;
- FIG. 5 is a perspective view of a plunger and stabilizer components thereon, according to the present invention.
- FIG. 6 is a perspective cutaway view of the plunger and stabilizers thereof in relation to a folded lens optic and haptics in the lumen of the instrument of FIGS. 2 and 3;
- FIG. 7 is an enlarged partial sectional view, taken at line 7 - 7 in FIG. 6;
- FIGS. 8, 9 and 10 are sectional views taken at lines 8 - 8 , 9 - 9 , and 10 - 10 in FIG. 1, showing a folded lens in different configurations in the plunger at successive positions in moving through the lumen;
- FIGS. 11A and 11B are sectional views showing the interrelationship among the ram, lumen and lens in the folding of the lens into folded configuration in a pre-insertion position in the lumen-tube.
- an improved insertion instrument 10 for inserting an intraocular lens into a patient's eye via a small incision.
- the instrument generally includes a lens insertion assembly 12 and an insertion actuator 14 .
- the lens insertion instrument is adapted to receive a foldable intraocular Lens 16 in an unfolded configuration.
- the terms “horizontal”, “vertical”, “upward” and “downward” are defined in relation to preferred orientation normally employed by a surgeon in using the instrument in the insertion of an intraocular lens into the eye of a patient.
- “horizontal” is a longitudinal direction of the instrument and plunger as indicated in FIGS. 1 and 5, and “vertical” is the direction perpendicular to such horizontal orientation.
- the insertion instrument may be utilized in other orientations.
- the lens insertion assembly 10 includes a receptacle 18 and an elongate tubular portion 20 which has an interior passage or lumen 21 , a nozzle 22 , and a tip 24 for insertion into the eye, the nozzle having a longitudinal slit 25 , as shown.
- the nozzle and tubular portion may typically be fabricated of polycarbonate, polyethylene, polystyrene, or other plastic with adequate flexibility.
- the lumen or bore 21 extends axially through tubular portion 20 , and has a longitudinal central axis.
- the receptacle 18 is preferably formed integrally with the tubular portion and has a lens storage chamber 26 extending laterally of bore 24 through an opening (not shown) in the wall of the bore.
- the foldable lens 16 is formed of appropriate flexible optical lens material, and has a central optic 28 and generally flat plate haptics 30 joined to opposite edges of the optic in a generally common plane transverse to the optic axis. Other types of foldable lenses may be utilized.
- the lens storage chamber 26 receives the lens in its unfolded configuration.
- a ram 32 serves as lens transfer and folding means, and cooperates with the chamber and receptacle 18 to define the lens storage space.
- the ram is operable by the user to move the unfolded lens from this storage position into the lumen or bore 21 (FIG. 11A) via the opening in the bore wall, and to fold the lens into a compact folded configuration with the lens in a pre-insertion position in the bore or lumen (FIG. 11B).
- the ram and receptacle have mating interfitting male and female configurations of slots 34 and ram wing portions 36 .
- the inner end of the rain has an arcuate end face 38 across which extends a transverse ridge 32 which is aligned with the longitudinal axis of the bore or lumen 21 .
- the inner curvature 38 of the ram is curved like the inner surface of the bore or lumen (FIG. 111B).
- the end surface or face 38 of the ram is flush with the inner wall surface of the lumen and faces the opposing wall surface of the bore.
- a plunger 40 (best shown in FIG. 5) constitutes lens insertion means to move the folded lens from its pre-insertion position through the lumen and tip 24 to eject the lens through the tip into the eye of the patient.
- the Lens is, in effect, wrapped about the plunger end portion in moving through the lumen.
- insertion actuator 14 which is preferably a rack and pinion arrangement, as shown, causes the end of plunger 40 to engage the lens in its pre-insertion position, and to urge the lens along the lumen toward nozzle 22 and tip 24 , and thence into the eye of the patient.
- a longitudinal ridge 58 is defined on the lumen wall (FIG. 8) and is aligned with ridge 32 on the inner ram surface to prevent rotation of the lens relative to the lumen wall.
- Ridges 60 , 62 are defined at opposite edges of slit wall. These ridges retain the lens against rotation relative to the lumen wall during movement along the lumen.
- the folded lens In moving through the lumen and nozzle, the folded lens has the successive configurations indicated in FIGS. 8, 9 and 10 , the lens being gradually opened to the configuration of FIG. 10.
Abstract
An insertion instrument provides improved features for insertion of a lens into the eye through a small incision. A tubular member has a lumen and a split nozzle end portion for spreading after insertion. Ridges on the lumen wall prevent rotation of the lens, and stabilizer components extend from a plunger end portion to maintain the lens compressed and to prevent lens rotation in moving through the lumen.
Description
- The present application is related to Applicant's pending application Ser. No. 08/751,181 which shows and describes some related features.
- The present invention addresses problems related to the insertion of an intraocular lens through a small incision in the human eye.
- Reference is made to Applicant's related application Ser. No. 08/751,181, wherein are illustrated and described certain relevant features and components, which application is incorporated herein by reference.
- In recent years, foldable intraocular lenses have largely replaced hard, rigid lenses, the foldable lens being insertable through an incision of approximately {fraction (1/2)} the size of an incision required for rigid lenses. A small incision enables more rapid recovery, less discomfort for a patient, and avoids many of the possible adverse complications of cataract surgery. Further, the procedure requires less time because suturing is not required.
- The problems addressed include undesirable rotation of a folded, compressed lens during passage through a lumen or tubular passage, the maintaining of the correct orientation of a lens relative to an insertion instrument, sudden expansion of unfolding of a compressed lens as it exits the insertion instrument into the eye, and difficulty in insertion of a tip of an insertion instrument into a small incision in the eye of a patient.
- Although various folding forceps have been provided for folding flexible lenses, it has generally been preferred by surgeons to utilize insertion devices whereby a lens enters the eye through a tube. Folding forcep devices generally comprise two components in addition to a lens, thus requiring two hands for their utilization.
- The improvements according to the invention include a plunger with stabilizing components thereon to exert forces on a folded lens to maintain the lens in folded configuration and to prevent rotation of the lens relative to a lumen wall.
- One or more slits in the nozzle end portion enable the spreading of the end portion by passage therethrough of the folded lens after insertion in the eye of a patient, thus to provide ease of admission of the folded lens into the eye of a patient.
- Ridges extend longitudinally of the lumen wall to aid in prevention of rotation of a folded lens relative to the lumen wall., these including ridges extending along opposite edges of at least one slit in the nozzle end portion of the insertion instrument to aid in the prevention of rotation of a folded lens relative to the lumen wall.
- FIG. 1 is an exploded perspective view of an insertion instrument of the present invention showing its receptacle actuator, tubular portion and nozzle;
- FIGS. 2 and 3 are sectional views of the instrument of FIG. 1, showing a Lens optic and haptics in folded configuration in the lumen with the nozzle tip inserted through an incision in the eye of a patient;
- FIG. 4 is an enlarged fragmentary view of the nozzle portion, showing the nozzle tip portion inserted via an incision in the eye of the patient, and the lens expanding within the eye;
- FIG. 5 is a perspective view of a plunger and stabilizer components thereon, according to the present invention;
- FIG. 6 is a perspective cutaway view of the plunger and stabilizers thereof in relation to a folded lens optic and haptics in the lumen of the instrument of FIGS. 2 and 3;
- FIG. 7 is an enlarged partial sectional view, taken at line7-7 in FIG. 6;
- FIGS. 8, 9 and10 are sectional views taken at lines 8-8, 9-9, and 10-10 in FIG. 1, showing a folded lens in different configurations in the plunger at successive positions in moving through the lumen; and
- FIGS. 11A and 11B are sectional views showing the interrelationship among the ram, lumen and lens in the folding of the lens into folded configuration in a pre-insertion position in the lumen-tube.
- Referring to the drawings, there is shown an improved
insertion instrument 10 for inserting an intraocular lens into a patient's eye via a small incision. The instrument generally includes alens insertion assembly 12 and aninsertion actuator 14. The lens insertion instrument is adapted to receive a foldableintraocular Lens 16 in an unfolded configuration. - As utilized herein for purposes of description, the terms “horizontal”, “vertical”, “upward” and “downward” are defined in relation to preferred orientation normally employed by a surgeon in using the instrument in the insertion of an intraocular lens into the eye of a patient. In this context, “horizontal” is a longitudinal direction of the instrument and plunger as indicated in FIGS. 1 and 5, and “vertical” is the direction perpendicular to such horizontal orientation. However, the insertion instrument may be utilized in other orientations.
- The
lens insertion assembly 10 includes areceptacle 18 and an elongatetubular portion 20 which has an interior passage orlumen 21, anozzle 22, and atip 24 for insertion into the eye, the nozzle having alongitudinal slit 25, as shown. The nozzle and tubular portion may typically be fabricated of polycarbonate, polyethylene, polystyrene, or other plastic with adequate flexibility. - The lumen or
bore 21 extends axially throughtubular portion 20, and has a longitudinal central axis. Thereceptacle 18 is preferably formed integrally with the tubular portion and has alens storage chamber 26 extending laterally ofbore 24 through an opening (not shown) in the wall of the bore. - The
foldable lens 16 is formed of appropriate flexible optical lens material, and has a central optic 28 and generallyflat plate haptics 30 joined to opposite edges of the optic in a generally common plane transverse to the optic axis. Other types of foldable lenses may be utilized. - The
lens storage chamber 26 receives the lens in its unfolded configuration. Aram 32 serves as lens transfer and folding means, and cooperates with the chamber andreceptacle 18 to define the lens storage space. The ram is operable by the user to move the unfolded lens from this storage position into the lumen or bore 21 (FIG. 11A) via the opening in the bore wall, and to fold the lens into a compact folded configuration with the lens in a pre-insertion position in the bore or lumen (FIG. 11B). - The ram and receptacle have mating interfitting male and female configurations of
slots 34 andram wing portions 36. Referring to FIGS. 11A and 11B, the inner end of the rain has anarcuate end face 38 across which extends atransverse ridge 32 which is aligned with the longitudinal axis of the bore orlumen 21. Theinner curvature 38 of the ram is curved like the inner surface of the bore or lumen (FIG. 111B). The end surface orface 38 of the ram is flush with the inner wall surface of the lumen and faces the opposing wall surface of the bore. - A plunger40 (best shown in FIG. 5) constitutes lens insertion means to move the folded lens from its pre-insertion position through the lumen and
tip 24 to eject the lens through the tip into the eye of the patient. The Lens is, in effect, wrapped about the plunger end portion in moving through the lumen. - Manual operation of
insertion actuator 14, which is preferably a rack and pinion arrangement, as shown, causes the end ofplunger 40 to engage the lens in its pre-insertion position, and to urge the lens along the lumen towardnozzle 22 andtip 24, and thence into the eye of the patient. - A
longitudinal ridge 58 is defined on the lumen wall (FIG. 8) and is aligned withridge 32 on the inner ram surface to prevent rotation of the lens relative to the lumen wall. -
Ridges - In moving through the lumen and nozzle, the folded lens has the successive configurations indicated in FIGS. 8, 9 and10, the lens being gradually opened to the configuration of FIG. 10.
- In passing through the nozzle and the outlet or
tip 24, the slitted end portions of the nozzle and tip are spread open, the spreading being limited by the sides of the incision in the eye. - Thus there has been shown and described an intraocular lens insertion instrument which fulfills all the objects and advantages sought therefor. Many changes, modifications, variations and other uses and applications of the subject invention will, however, become apparent to those skilled in the art after considering this specification together with the accompanying drawings and claims. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.
Claims (20)
1. An insertion instrument for delivery of an intraocular lens into a human eye through a small incision, said apparatus including:
an elongate generally tubular member having a longitudinal axis and defining a lumen,
said tubular member having a tapered nozzle portion defining an outlet end opening for release of the lens into the eye, and having a lens insertion opening spaced from said outlet end opening,
a lens receptacle defining a lens chamber communicating with said lens insertion opening in said tubular member, said lens receptacle having oppositely laterally extending slot portions,
a ram slidable in said lens chamber and having laterally oppositely extending wing portions slidable in said lens receptacle slot portions,
said ram having an end portion contoured to cooperate with an inner lumen wall to fold the lens into a folded pre-insertion configuration, and
a plunger for urging the lens through said lumen and outwardly therefrom into the eye.
2. An insertion apparatus according to claim 1 , wherein:
at least one slit is defined in the tapered nozzle portion to facilitate the spreading of the nozzle portion upon movement therethrough of the lens.
3. Canceled.
4. Canceled.
5. An insertion apparatus according to claim 1 , and further including:
a ridge on said end portion of the ram and positioned and adapted to retain the folded lens against rotation relative to said inner lumen wall.
6. Canceled.
7. An insertion apparatus according to claim 1 , wherein:
the plunger has a forward portion recessed and configurated to engage the end portion of a folded lens haptic to accurately urge the lens through the lumen.
8. An insertion apparatus for delivery of an intraocular lens into a human eye through a small incision, said apparatus including:
an elongate generally tubular member having a longitudinal axis and defining a lumen,
said tubular member having a tapered nozzle portion defining an outlet end opening for release of the lens into the eye,
ram means for insertion into the lumen of said lens via an insertion opening in the tubular member with said lens in a folded condition,
plunger means for urging the lens through the lumen and outwardly therefrom into the eye, and
at least one stabilizer extending outwardly from a forward end portion of the plunger to exert force on the folded lens to maintain the lens in predetermined orientation and in folded configuration during movement of the lens through the lumen.
9. A lens insertion apparatus according to claim 8 , wherein:
the stabilizer element is an optic stabilizer extending upwardly and forwardly of the forward end portion of the plunger to engage the folded optic of the lens to urge it downwardly and forwardly toward the nozzle portion.
10. A lens insertion apparatus according to claim 9 , wherein the stabilizer element slidably engages the lumen wall.
11. A lens insertion apparatus according to claim 8 , wherein:
said stabilizer is a plate stabilizer extending laterally outwardly from the forward end portion of the plunger to overlay and exert pressure on a folded lens haptic for maintaining a haptic in folded configuration and correctly oriented during movement through the lumen.
12. A lens insertion apparatus according to claim 8 , wherein:
two plate stabilizers extend oppositely from said plunger end portion to act on a lens haptic to maintain it in folded configuration and correctly oriented during movement through the lumen.
13. An insertion apparatus for delivery of an intraocular lens into a human eye through a small incision, said apparatus including:
an elongate generally tubular member having a longitudinal axis and defining a lumen,
said tubular member having a tapered nozzle portion defining an outlet end opening for release of the lens into the eye,
ram means for insertion into the lumen of said lens via an insertion opening in the tubular member with said lens in a folded condition,
a plunger for urging the lens through the lumen and outwardly therefrom into the eye,
said tapered nozzle portion having defined therein at least one longitudinal slit extending to said outlet opening for resilient spreading of the tapered nozzle portion upon movement therethrough of the lens,
an optic stabilizer extending forwardly and upwardly of the forward end portion of the plunger to engage the folded optic of the lens to urge it downwardly and forwardly, and
at least one plate stabilizer extending laterally outwardly from the forward end portion of the plunger to overlay and exert pressure on a lens haptic to aid in maintaining the haptic in folded configuration and properly oriented during movement through the lumen.
14. An insertion apparatus according to claim 13 , wherein:
the plunger has a forward end face recessed and configurated to engage the trailing end portion of a folded lens haptic for accurate engagement to urge the lens through the lumen from its pre-insertion position through the lumen and outwardly in to the eye of a patient.
15-20. Canceled.
21. An insertion apparatus according to claim 8 , wherein:
said ram means comprises a ram member slidably mounted for movement through said insertion opening, and
said ram means has an end portion contoured to cooperate with an inner wall of said lumen to fold the lens into a folded pre-insertion configuration.
22. An insertion apparatus according to claim 13 , and further including:
a lens receptacle defining a lens chamber communicating with said lens insertion opening in said tubular member, and
said ram means is slidable in said lens chamber.
23. An insertion apparatus according to claim 22 , wherein:
said ram means has an end portion contoured to cooperate with an inner lumen wall to fold the lens into a folded pre-insertion configuration.
24. An insertion instrument according to claim 1 , and further comprising:
means comprising a pinion engaging a rack connected with the plunger to urge the lens through the lumen and outwardly therefrom into the eye.
25. An insertion instrument according to claim 1 , wherein:
said contoured rain end portion has a curvature similar to a curvature of a confronting tubular member wall and extends to engage the lens to roll and fold the lens between the ram contoured end portion and the curved tubular member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/326,498 US20040215207A1 (en) | 1998-05-11 | 2002-12-20 | Intraocular lens insertion instrument |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/075,931 US6497708B1 (en) | 1998-05-11 | 1998-05-11 | Intraocular lens insertion instrument |
US10/326,498 US20040215207A1 (en) | 1998-05-11 | 2002-12-20 | Intraocular lens insertion instrument |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/075,931 Continuation US6497708B1 (en) | 1998-05-11 | 1998-05-11 | Intraocular lens insertion instrument |
Publications (1)
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US20040215207A1 true US20040215207A1 (en) | 2004-10-28 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US09/075,931 Expired - Lifetime US6497708B1 (en) | 1998-05-11 | 1998-05-11 | Intraocular lens insertion instrument |
US10/326,498 Abandoned US20040215207A1 (en) | 1998-05-11 | 2002-12-20 | Intraocular lens insertion instrument |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US09/075,931 Expired - Lifetime US6497708B1 (en) | 1998-05-11 | 1998-05-11 | Intraocular lens insertion instrument |
Country Status (6)
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US (2) | US6497708B1 (en) |
EP (1) | EP1085843A1 (en) |
JP (1) | JP2002514466A (en) |
AU (1) | AU768099B2 (en) |
CA (1) | CA2331574A1 (en) |
WO (1) | WO1999058086A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
JP2002514466A (en) | 2002-05-21 |
CA2331574A1 (en) | 1999-11-18 |
WO1999058086A1 (en) | 1999-11-18 |
AU3973999A (en) | 1999-11-29 |
US6497708B1 (en) | 2002-12-24 |
AU768099B2 (en) | 2003-12-04 |
EP1085843A1 (en) | 2001-03-28 |
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