WO2014147646A2 - 360 degree iris retraction ring - Google Patents

360 degree iris retraction ring Download PDF

Info

Publication number
WO2014147646A2
WO2014147646A2 PCT/IN2014/000169 IN2014000169W WO2014147646A2 WO 2014147646 A2 WO2014147646 A2 WO 2014147646A2 IN 2014000169 W IN2014000169 W IN 2014000169W WO 2014147646 A2 WO2014147646 A2 WO 2014147646A2
Authority
WO
WIPO (PCT)
Prior art keywords
iris
ring
pupil
retractor
degree
Prior art date
Application number
PCT/IN2014/000169
Other languages
French (fr)
Other versions
WO2014147646A3 (en
Inventor
Satish D SHET
Original Assignee
Shet Satish D
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 Shet Satish D filed Critical Shet Satish D
Publication of WO2014147646A2 publication Critical patent/WO2014147646A2/en
Publication of WO2014147646A3 publication Critical patent/WO2014147646A3/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/02Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
    • A61B17/0231Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors for eye surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/02Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
    • A61B17/0293Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors with ring member to support retractor elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery

Definitions

  • the present invention generally refers to a medical device or surgical instrument for use in ophthalmic surgery, and in particular to an iris retractor for use in eye surgery for retraction of the iris.
  • This invention relates to an iris retractor for increasing the pupillary aperture during eye surgery.
  • One of the major problems in phacoemulsification which is a small incision extracapsular cataract surgery, with implantation of a foldable intraocular lens, is the size of the pupil.
  • the pupil usually is dilated using topical preparations such as Homatropine, Cyclopentolate, Tropicamide and Phenylephrine combinations.
  • the increased intraocular manipulation which accompanies these new procedures is usually attended by constriction of the pupil, which makes visualization of the anterior lens capsule, the lens and posterior lens capsule quite difficult.
  • Inadequate pupil dilation can be observed in cases complicated by pseudoexfoliation syndrome, uveitis, posterior synechiae, trauma, chronic miotic therapy or previous intraocular surgery.
  • the pupil does not dilate in certain situations such as Diabetes, Intraoperative Floppy Iris Syndrome (IFIS) and in complicated cataract.
  • IFIS Intraoperative Floppy Iris Syndrome
  • a principal object of this invention is to provide an iris retractor that can be quickly and easily inserted into the eye.
  • a further object of this invention is to provide an iris retractor that can be quickly and easily removed from the eye at completion of surgery. Yet another object of this invention is to achieve a gradual incremental expansion of the pupil so as to prevent injury to the delicate iris structure during insertion. In addition, this controlled stretching of the pupil to a precisely determined and limited extent may restore the pupil to a more normal and desirable size, improving its function as an iris diaphragm.
  • Another object of this invention is to prevent the over-stretching of the pupil during the operative maneuvers by limiting its expansion to a precise, predetermined size just large enough to accomplish the intended surgical maneuvers.
  • Another object of this invention is to attach the appliance securely to the iris by the clamping effect of its "C" cross section so that the entire pupil aperture created can be transposed in the plane of the iris by gentle lateral pressure on the ring thereby exposing additional fields for surgical maneuvers.
  • Yet another object of this invention is to provide sustained dilation and protection of the pupil margin during surgical procedures such as in phacoemulsification.
  • the appliance would also allow re- expansion of the pupil where the pupil constricts during the course of a surgical procedure thereby restoring visibility and surgical access.
  • Another object of this invention is to provide an iris retractor which can be made in different sizes depending on the anticipated surgical procedure such as cataract surgery, retinal surgery, vitreous surgery, etc.
  • Yet another object of this invention is to provide an iris retractor that will stay in place once it is inserted, and which will not irritate or damage the eye tissues.
  • Another object of this invention is to provide an iris retractor which can be easily transported, stored and otherwise handled and manipulated.
  • the instant invention provides an iris retractor for use during eye surgery.
  • the retractor comprises a substantially circular, resilient C- shaped ring of hollow PMMA (Polymethyl methacrylate) or silicone or other biomaterial formed into a partial circle in cross section having curved surface to cover the anterior (upper)and the Posterior (lower) portion of the iris at the pupillary margin. It has a 360 degree rim with two open ends-one end with an eyelet with a keyhole like opening on the upper surface and the other end with a button on an arm on the same surface to provide an interlocking mechanism. Once the ring is placed in situ with an interlocking mechanism, it provides 360 degree tension on the iris to retract.
  • the (PMMA or silicone) ring can be injected through a 2.2mm or larger incision either manually or through a custom made injector. This eliminates the need to make several extra paracentesis.
  • the 360 degree retractor comprises a resilient C -shaped hollow ring with two open ends-with an eyelet at one end with a keyhole like opening and a button with an arm at the other end to provide an interlocking mechanism.
  • the circumference of the retractor is preferably about 7-8 mm.
  • the anterior portion of the eye with the cornea Prior to the eye surgery, the anterior portion of the eye with the cornea is completely intact. In order for the surgery to proceed, the cornea must be incised at the limbus or clear cornea and a 2.2mm or more incision is made to permit insertion of the retractor into the pupil.
  • two Sinskey Hooks are used to mobilize the ring into position with the help of three dialing holes on the anterior (Upper) surface at locations as shown in the drawings to retract the iris.
  • the rim of the retractor is thus worked into an abutting relationship with the iris, in which the rim holds back the iris by an interlocking mechanism at the two ends of the retractor and thereby enlarges the pupil.
  • the retraction afforded by the retractor allows easy access to the lens and the capsular fornix around the entire circumference of the anterior chamber, thereby reducing the need for additional instrumentation in the eye.
  • the retractor is advanced across the anterior chamber until the middle portion of the retractor engages the iris at a 6 o'clock position.
  • a Sinskey hook or lens manipulator is used to hold the retractor in place with the help of a dialing hole against the iris sphincter. Once the ring is engaged against the iris sphincter the Sinskey hook is moved to another dialing hole adjacent to the eyelet with a keyhole like opening at one end.
  • Another Sinskey hook is inserted through the main port and engaged into another dialing hole adjacent to the button on an arm at the other end of the ring and both Sinskey hooks are maneuvered to engage the ends of the ring into a locking mechanism at 12 o'clock position of the iris.
  • Sinskey hooks are again engaged into the dialing holes to unlock the 360 degree iris retraction ring.
  • One end of the ring is brought out of the sideport incision and the other end follows through the same incision site.
  • the retractor should be formed from a non-toxic, disposable biomaterial, preferably PMMA or silicone and is intended for a single use only.
  • the instant invention overcomes the foregoing problems by providing an iris retractor which is held in place by an interlocking mechanism which can be unlocked at the end of phacoemulsification procedure and which provides equal stretching for 360 degrees around the iris.

Landscapes

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

Abstract

The invention discloses an iris retractor for use during eye surgery. The retractor comprises a substantially circular, resilient C-shaped hollow ring made of PMMA (Polymethyl methacrylate), silicone or other biomaterial formed into a partial circle in cross section having curved surface to cover the anterior and the Posterior portion of the iris at the pupillary margin. It has a 360 degree rim with two open ends-one end with an eyelet with a keyhole like opening on the upper surface and the other end with a button on an arm on the same surface to provide an interlocking mechanism. Once the ring is placed in situ with an interlocking mechanism, it provides 360 degree tension on the iris to retract. The (PMMA or silicone) ring can be injected through a 2.2mm or larger clear corneal or limbal incision either manually or through a custom made injector.

Description

360 DEGREE IRIS RETRACTION RING
DESCRIPTION
Field of the Invention
The present invention generally refers to a medical device or surgical instrument for use in ophthalmic surgery, and in particular to an iris retractor for use in eye surgery for retraction of the iris.
Background of the Invention
This invention relates to an iris retractor for increasing the pupillary aperture during eye surgery. One of the major problems in phacoemulsification which is a small incision extracapsular cataract surgery, with implantation of a foldable intraocular lens, is the size of the pupil. The pupil usually is dilated using topical preparations such as Homatropine, Cyclopentolate, Tropicamide and Phenylephrine combinations. The increased intraocular manipulation which accompanies these new procedures is usually attended by constriction of the pupil, which makes visualization of the anterior lens capsule, the lens and posterior lens capsule quite difficult. Inadequate pupil dilation can be observed in cases complicated by pseudoexfoliation syndrome, uveitis, posterior synechiae, trauma, chronic miotic therapy or previous intraocular surgery. The pupil does not dilate in certain situations such as Diabetes, Intraoperative Floppy Iris Syndrome (IFIS) and in complicated cataract.
There are devices being used in eye surgery today which retract the iris, thereby enlarging the pupil, but these self retaining iris retractors currently in use do not provide equal stretching for 360 degrees around the iris and hence, do not provide a round pupil to carry out the surgical procedure easily and safely.
Objectives of the Invention
A principal object of this invention is to provide an iris retractor that can be quickly and easily inserted into the eye.
A further object of this invention is to provide an iris retractor that can be quickly and easily removed from the eye at completion of surgery. Yet another object of this invention is to achieve a gradual incremental expansion of the pupil so as to prevent injury to the delicate iris structure during insertion. In addition, this controlled stretching of the pupil to a precisely determined and limited extent may restore the pupil to a more normal and desirable size, improving its function as an iris diaphragm.
Another object of this invention is to prevent the over-stretching of the pupil during the operative maneuvers by limiting its expansion to a precise, predetermined size just large enough to accomplish the intended surgical maneuvers.
Another object of this invention is to attach the appliance securely to the iris by the clamping effect of its "C" cross section so that the entire pupil aperture created can be transposed in the plane of the iris by gentle lateral pressure on the ring thereby exposing additional fields for surgical maneuvers.
Yet another object of this invention is to provide sustained dilation and protection of the pupil margin during surgical procedures such as in phacoemulsification. The appliance would also allow re- expansion of the pupil where the pupil constricts during the course of a surgical procedure thereby restoring visibility and surgical access.
Another object of this invention is to provide an iris retractor which can be made in different sizes depending on the anticipated surgical procedure such as cataract surgery, retinal surgery, vitreous surgery, etc.
Yet another object of this invention is to provide an iris retractor that will stay in place once it is inserted, and which will not irritate or damage the eye tissues.
Another object of this invention is to provide an iris retractor which can be easily transported, stored and otherwise handled and manipulated.
Another object of this invention is to provide an iris retractor which will provide the surgeon with good visibility of the eye and will not interfere with the surgical procedures. Yet another object of this invention is to provide an iris retractor which will provide a method of inserting the iris retractor of this invention in a quick and safe manner.
These and other objects will be apparent to those skilled in the art SUMMARY OF THE INVENTION
The instant invention provides an iris retractor for use during eye surgery. The retractor comprises a substantially circular, resilient C- shaped ring of hollow PMMA (Polymethyl methacrylate) or silicone or other biomaterial formed into a partial circle in cross section having curved surface to cover the anterior (upper)and the Posterior (lower) portion of the iris at the pupillary margin. It has a 360 degree rim with two open ends-one end with an eyelet with a keyhole like opening on the upper surface and the other end with a button on an arm on the same surface to provide an interlocking mechanism. Once the ring is placed in situ with an interlocking mechanism, it provides 360 degree tension on the iris to retract. The (PMMA or silicone) ring can be injected through a 2.2mm or larger incision either manually or through a custom made injector. This eliminates the need to make several extra paracentesis.
DESCRIPTION
In describing the preferred embodiment of the instant invention, reference is made to the drawings, wherein there is seen a 360 degree iris retractor generally designated in a circular configuration. The 360 degree retractor comprises a resilient C -shaped hollow ring with two open ends-with an eyelet at one end with a keyhole like opening and a button with an arm at the other end to provide an interlocking mechanism. The circumference of the retractor is preferably about 7-8 mm.
Prior to the eye surgery, the anterior portion of the eye with the cornea is completely intact. In order for the surgery to proceed, the cornea must be incised at the limbus or clear cornea and a 2.2mm or more incision is made to permit insertion of the retractor into the pupil. Upon insertion of the retractor into the pupil , two Sinskey Hooks are used to mobilize the ring into position with the help of three dialing holes on the anterior (Upper) surface at locations as shown in the drawings to retract the iris. The rim of the retractor is thus worked into an abutting relationship with the iris, in which the rim holds back the iris by an interlocking mechanism at the two ends of the retractor and thereby enlarges the pupil. The retraction afforded by the retractor allows easy access to the lens and the capsular fornix around the entire circumference of the anterior chamber, thereby reducing the need for additional instrumentation in the eye.
The retractor is advanced across the anterior chamber until the middle portion of the retractor engages the iris at a 6 o'clock position. A Sinskey hook or lens manipulator is used to hold the retractor in place with the help of a dialing hole against the iris sphincter. Once the ring is engaged against the iris sphincter the Sinskey hook is moved to another dialing hole adjacent to the eyelet with a keyhole like opening at one end. Another Sinskey hook is inserted through the main port and engaged into another dialing hole adjacent to the button on an arm at the other end of the ring and both Sinskey hooks are maneuvered to engage the ends of the ring into a locking mechanism at 12 o'clock position of the iris.
When the surgical maneuvers are completed, Sinskey hooks are again engaged into the dialing holes to unlock the 360 degree iris retraction ring. One end of the ring is brought out of the sideport incision and the other end follows through the same incision site.
The retractor should be formed from a non-toxic, disposable biomaterial, preferably PMMA or silicone and is intended for a single use only. The instant invention overcomes the foregoing problems by providing an iris retractor which is held in place by an interlocking mechanism which can be unlocked at the end of phacoemulsification procedure and which provides equal stretching for 360 degrees around the iris.
Various modifications and changes are contemplated and may obviously be resorted to, without departing from the spirit or scope of the invention. Description of Drawings (Please refer drawings attached in the Annex)
Fig 1 -360 degree iris retraction ring -superior view
Fig 2 -360 degree iris retraction ring -bottom view

Claims

CLAIMS I Claim :
1. A single use 360 degree iris retraction ring comprising, a) a substantially circular, resilient C-shaped hollow ring of PMMA, Silicone or other biomaterial formed into a partial circle in cross section, with a circumference of about 7-8 mm, b) such ring having curved surface to cover the anterior and posterior portion of the iris at the pupillary margin c) such iris retraction ring having a 360 degree rim with two open ends, wherein one end with a keyhole like opening on the upper surface and the other end with a button on an arm on the same surface to provide an interlocking mechanism, d) such ring providing 360 degree tension on the iris to retract, when the ring is placed in situ and the interlocking mechanism is engaged.
The invention as claimed in claim 1, wherein the iris retraction ring can be quickly and easily inserted into the eye and also quickly and easily removed from the eye.
The invention as claimed in claim 1, wherein the iris retraction ring achieves a gradual incremental expansion of the pupil, thereby preventing injury to the delicate iris structure during insertion of the ring.
The invention as claimed in claim 1, wherein the iris retraction ring achieves a limited and precisely determined stretching of the pupil, which helps to restore the pupil to a more normal and desirable size thereby improving its function as a diaphragm.
The invention as claimed in claim 1, wherein the iris retraction ring, prevents over-stretching of the pupil during the operative maneuvers by limiting its expansion to a predetermined size and which will provide the surgeon with good visibility of the eye and will not interfere with the surgical procedures.
6. The invention as claimed in claim 1, wherein the iris retraction ring attaches the appliance securely to the iris by the clamping effect of its "C" cross section so that the entire pupil aperture created can be transposed in the plane of the iris by gentle lateral pressure on the ring thereby exposing additional fields for surgical maneuvers.
7. The invention as claimed in claim 1, wherein the iris retraction ring, provides sustained dilation and protection of the pupil margin during surgical procedures such as in phacoemulsification and also allowing re-expansion of the pupil where the pupil constricts during the course of a surgical procedure thereby restoring visibility and surgical access.
8. The invention as claimed in claim 1, wherein the iris retractor ring can be made in different sizes for surgical procedures such as cataract surgery, retinal surgery, vitreous surgery and other such procedures.
9. The invention as claimed in claim 1, wherein the iris retractor ring once inserted will stay in place and not irritate or damage the eye tissues.
10. The invention as claimed in claim 1, wherein the iris retraction ring can be injected through a 2.2 mm or larger incision either manually or through a custom made injector, thereby eliminating the need to make extra paracentesis.
PCT/IN2014/000169 2013-03-19 2014-03-17 360 degree iris retraction ring WO2014147646A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1176/CHE/2013 2013-03-19
IN1176CH2013 2013-03-19

Publications (2)

Publication Number Publication Date
WO2014147646A2 true WO2014147646A2 (en) 2014-09-25
WO2014147646A3 WO2014147646A3 (en) 2014-12-24

Family

ID=51581567

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2014/000169 WO2014147646A2 (en) 2013-03-19 2014-03-17 360 degree iris retraction ring

Country Status (1)

Country Link
WO (1) WO2014147646A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3364852A4 (en) * 2015-10-20 2019-06-26 National University of Singapore Expander for holding apart an opening in a tissue and method of operating the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5163419A (en) * 1991-04-04 1992-11-17 Goldman Kenneth N Device for expanding the pupil of a human eye
US5267553A (en) * 1992-02-18 1993-12-07 Graether John M Pupil expander and method of using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5163419A (en) * 1991-04-04 1992-11-17 Goldman Kenneth N Device for expanding the pupil of a human eye
US5267553A (en) * 1992-02-18 1993-12-07 Graether John M Pupil expander and method of using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3364852A4 (en) * 2015-10-20 2019-06-26 National University of Singapore Expander for holding apart an opening in a tissue and method of operating the same
US10716555B2 (en) 2015-10-20 2020-07-21 National University Of Singapore Expander for holding apart an opening in a tissue and method of operating the same

Also Published As

Publication number Publication date
WO2014147646A3 (en) 2014-12-24

Similar Documents

Publication Publication Date Title
JP7069231B2 (en) Iris dilator
JP5528600B1 (en) Pupil dilator
US4387706A (en) Iris retractor
Graether Graether pupil expander for managing the small pupil during surgery
US5267553A (en) Pupil expander and method of using the same
Novák Flexible iris hooks for phacoemulsification
US9089397B2 (en) Iris shield
US20200187930A1 (en) Eye surgery device
Masket Avoiding complications associated with iris retractor use in small pupil cataract extraction
WO1995015120A1 (en) Pupil expander and method of using the same
WO2014156583A1 (en) Pupil expander
Rashad et al. Retropupillary fixation of iris-claw intraocular lens versus trans-scleral suturing fixation for aphakic eyes without capsular support
AU621911B2 (en) Bandage for maintaining anterior chamber of eye
Sheen-Ophir et al. Outcomes of first 50 cases using a new pupil expander
WO2014147646A2 (en) 360 degree iris retraction ring
CN116616836A (en) Iris expansion device with adjustable it is intraocular
EP3632384B1 (en) Iris shield
EP0731670A1 (en) Pupil expander and method of using the same
Tripathy et al. Pupil expansion devices and mechanical stretching of the pupil
CN110547907A (en) Double-ring iris expander for intraocular operation
CN211723661U (en) Iris dilation device
JP6978133B1 (en) Pupil dilator
CN210872429U (en) Novel iris expander
CN211583798U (en) Iris expander
US11337854B2 (en) Intraocular iris protector and method of using same

Legal Events

Date Code Title Description
122 Ep: pct application non-entry in european phase

Ref document number: 14767339

Country of ref document: EP

Kind code of ref document: A2