CA2617036A1 - Irrigation/aspiration tip - Google Patents
Irrigation/aspiration tip Download PDFInfo
- Publication number
- CA2617036A1 CA2617036A1 CA002617036A CA2617036A CA2617036A1 CA 2617036 A1 CA2617036 A1 CA 2617036A1 CA 002617036 A CA002617036 A CA 002617036A CA 2617036 A CA2617036 A CA 2617036A CA 2617036 A1 CA2617036 A1 CA 2617036A1
- Authority
- CA
- Canada
- Prior art keywords
- cannula
- sleeve
- aspiration
- tip
- irrigation
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/84—Drainage tubes; Aspiration tips
- A61M1/85—Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M3/00—Medical syringes, e.g. enemata; Irrigators
- A61M3/02—Enemata; Irrigators
- A61M3/0279—Cannula; Nozzles; Tips; their connection means
- A61M3/0283—Cannula; Nozzles; Tips; their connection means with at least two inner passageways, a first one for irrigating and a second for evacuating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0813—Accessories designed for easy sterilising, i.e. re-usable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/06—Head
- A61M2210/0612—Eyes
Abstract
An irrigation/aspiration tip (100) for use with a handpiece (140) in ophthalmic phacoemulsification surgery is provided, having a relatively rigid cannula (112) attached to a hub (116) and an open end (118) opposite the hub. Coaxially and removably received over the cannula is a soft elastomeric or rubber sleeve (114). The sleeve forms a gap (130) between the sleeve and the cannula, the gap allowing irrigation flow. The distal end of the sleeve is closed by reduced diameter cap (115) portion. The reduced diameter of the cap seals the distal end (119) of the cannula except for an aspiration port (120). The relatively soft cap reduces the likelihood that the posterior capsule will tear during cortical clean-up and capsule polishing during ophthalmic surgery. Removing the sleeve allows the cannula to be resterilized an unlimited number of times, thereby allowing unlimited reuse of the cannula.
Description
Re: 3170 US
IRRIGATION/ASPIRATION TIP
This invention relates to aspiration tips and more particularly to aspiration tips used in ophthalmic phacoemulsification surgery.
s BACKGROUND OF THE INVENTION
The human eye in its simplest terms functions to provide vision by transmitting light through a clear outer portion called the cornea, and focusing the io image by way of the lens onto the retina. The quality of the focused image depends on many factors including the size and shape of the eye, and the transparency of the cornea and lens.
When age or disease causes the lens to become less transparent, vision deteriorates because of the diminished light which can be transmitted to the retina.
15 This deficiency in the lens of the eye is medically known as a cataract. An accepted treatment for this condition is surgical removal of the lens and replacement of the lens function by an artificial lens.
In the United States, the majority of cataractous lenses are removed by a surgical technique called phacoemulsification. During this procedure, a thin 20 phacoemulsification cutting tip is inserted into the diseased lens and vibrated ultrasonically. The vibrating cutting tip liquifies or emulsifies the lens so that the lens may be aspirated out of the eye. The diseased lens, once removed, is replaced by the artificial lens.
Prior to the introduction of the artificial intraocular lens into the eye, softer 25 cortical material is aspirated from the eye using an aspiration tip.
Aspiration tips are similar to phacoemulsification tips, but with a smaller operiing at the distal end and not typically vibrated ultrasonically. The aspiration tip may also be used to "polish"
the posterior capsule to remove residual epithelial cells and reduce the risk of posterior capsule opacification. Conventional aspiration tips are made from titanium 30 or stainless steel. These tips must be highly polished to reduce burrs and eliminate sharp edges that may snag or tear the posterior capsule. Polishing the aspiration port and the interior lumen of the aspiration tip, however, is very difficult and some burrs may remain even after extensive polishing. During capsule polishing and cortical Re: 3170 US
clean-up, the posterior capsule may be drawn partially into the aspiration port and interior lumen of the aspiration tip. If these portions of the aspiration tip contain rough edges or burrs, tearing of the posterior capsule can occur. In addition, during repeated use, the exterior of the aspiration tip can develop burrs and rough spots that can snag s or tear the capsule.
One prior aspiration tip, disclosed in U.S, Patent No. 5,718,677 (Capetan, et al.) overcomes the problems associated with metal tips by installing a silicone rubber tip cap over the distal end of the metal cannula. While the device is effective is reducing or eliminating some of the risks discussed above, the rubber tip cap must be io fixed to the metal tip to prevent the tip cap from sliding off of the metal tip. While the rubber tip cap is sterilizable in an autoclave, the tip cap is much more easily damaged than the metal cannula, thereby limiting the number of reuses of the tip assembly. In addition, as with other commercially available tips, the tip cap does not provide any irrigation function, so a separate irrigation handpiece or an infusion sleeve over the is aspiration tip must be used.
Accordingly, a need continues to exist for an irrigation/aspiration tip that reduces the possibility of tearing the posterior capsule during cortical clean-up and capsule polishing.
The present invention improves upon prior art aspiration tips by providing an irrigationlaspiration tip having a relatively rigid cannula attached to a hub and an open end opposite the hub. Coaxially and removably received over the tip is a soft 25 elastomeric or rubber sleeve. The sleeve forms a gap between the sleeve and the cannula, the gap allowing irrigation flow. The distal end of the sleeve is closed by a cap of reduced diameter. The reduced diameter of the cap seals the distal end of the cannula. The relatively soft cap reduces the likelihood that the posterior capsule will tear during cortical clean-up and capsule polishing. Removing the sleeve allows the 30 cannula to be resterilized an unlimited number of times, thereby allowing unlimited reuse of the cannula.
One objective of the present invention is to provide an irrigation/aspiration tip that reduces the likelihood of tearing the posterior capsule.
Re: 3170 US
Another objective of the present invention is to provide an aspiration tip having an open lumen sealed with a flexible cap.
Other objectives, features and advantages of the present invention will become apparent with reference to the drawings, and the following description of the drawings s and claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. I is an expanded perspective view of a prior art aspiration tip.
io FIG. 2 is an enlarged cross-sectional view of the irrigation/aspiration tip of the present invention.
FIG. 3 is an enlarged cross-sectional view of the irrigation/aspiration tip of the present invention.
FIG. 4 is an enlarged perspective view of the irrigation/aspiration tip of the is present invention installed on a handpiece.
DETAILED DESCRIPTION OF THE PRFERRED EMBODIMENTS
As best seen in FIG. 1, prior art aspiration tip 10 consists of aspiration cannula 20 12 and cap 14. Cannula 12 is open at distal end 18 and is attached to hub 16 at proximal end 22. Hub 16 allows aspiration tip 10 to be attached to an appropriate handpiece (not shown). Distal end 18 is sealed by cap 14. Cap 14 is generally tubular in shape, is open on proximal end 24 and closed on distal end 26 except for port 20.
As best seen in FIGS. 2, 3 and 4, irrigation aspiration tip 100 of the present 25 invention generally includes aspiration cannula 112 and sleeve 114. Cannula 112 is open at distal end 118 and is attached to hub 116 at proximal end 122. Hub 116 allows aspiration tip 100 to be attached to handpiece 140. Distal end 118 of cannula 112 is sealed by reduced diameter end cap 115, which is integrally formed at distal end 119 of shaft 121 of sleeve 114. End cap 115 is generally tubular in shape and 30 closed on distal end 126 except for port 120. The reduced diameter of end cap 115 causes end cap 115 to seal tightly about distal end 118 of cannula 112. Sleeve forms coaxial gap 130 around cannula 112. Gap 130 allows irrigation flow down gap 130 and out ports 132. When vacuum is applied to interior lumen 136 of cannula 112, Re: 3170 US
material can be aspirated through port 120, down interior lumen 136 and out of tip 110.
While certain embodiments of the present invention have been described above, these descriptions are given for purposes of illustration and explanation.
s Variations, changes, modifications and departures from the systems and methods disclosed above may be adopted without departure from the scope or spirit of the present invention.
IRRIGATION/ASPIRATION TIP
This invention relates to aspiration tips and more particularly to aspiration tips used in ophthalmic phacoemulsification surgery.
s BACKGROUND OF THE INVENTION
The human eye in its simplest terms functions to provide vision by transmitting light through a clear outer portion called the cornea, and focusing the io image by way of the lens onto the retina. The quality of the focused image depends on many factors including the size and shape of the eye, and the transparency of the cornea and lens.
When age or disease causes the lens to become less transparent, vision deteriorates because of the diminished light which can be transmitted to the retina.
15 This deficiency in the lens of the eye is medically known as a cataract. An accepted treatment for this condition is surgical removal of the lens and replacement of the lens function by an artificial lens.
In the United States, the majority of cataractous lenses are removed by a surgical technique called phacoemulsification. During this procedure, a thin 20 phacoemulsification cutting tip is inserted into the diseased lens and vibrated ultrasonically. The vibrating cutting tip liquifies or emulsifies the lens so that the lens may be aspirated out of the eye. The diseased lens, once removed, is replaced by the artificial lens.
Prior to the introduction of the artificial intraocular lens into the eye, softer 25 cortical material is aspirated from the eye using an aspiration tip.
Aspiration tips are similar to phacoemulsification tips, but with a smaller operiing at the distal end and not typically vibrated ultrasonically. The aspiration tip may also be used to "polish"
the posterior capsule to remove residual epithelial cells and reduce the risk of posterior capsule opacification. Conventional aspiration tips are made from titanium 30 or stainless steel. These tips must be highly polished to reduce burrs and eliminate sharp edges that may snag or tear the posterior capsule. Polishing the aspiration port and the interior lumen of the aspiration tip, however, is very difficult and some burrs may remain even after extensive polishing. During capsule polishing and cortical Re: 3170 US
clean-up, the posterior capsule may be drawn partially into the aspiration port and interior lumen of the aspiration tip. If these portions of the aspiration tip contain rough edges or burrs, tearing of the posterior capsule can occur. In addition, during repeated use, the exterior of the aspiration tip can develop burrs and rough spots that can snag s or tear the capsule.
One prior aspiration tip, disclosed in U.S, Patent No. 5,718,677 (Capetan, et al.) overcomes the problems associated with metal tips by installing a silicone rubber tip cap over the distal end of the metal cannula. While the device is effective is reducing or eliminating some of the risks discussed above, the rubber tip cap must be io fixed to the metal tip to prevent the tip cap from sliding off of the metal tip. While the rubber tip cap is sterilizable in an autoclave, the tip cap is much more easily damaged than the metal cannula, thereby limiting the number of reuses of the tip assembly. In addition, as with other commercially available tips, the tip cap does not provide any irrigation function, so a separate irrigation handpiece or an infusion sleeve over the is aspiration tip must be used.
Accordingly, a need continues to exist for an irrigation/aspiration tip that reduces the possibility of tearing the posterior capsule during cortical clean-up and capsule polishing.
The present invention improves upon prior art aspiration tips by providing an irrigationlaspiration tip having a relatively rigid cannula attached to a hub and an open end opposite the hub. Coaxially and removably received over the tip is a soft 25 elastomeric or rubber sleeve. The sleeve forms a gap between the sleeve and the cannula, the gap allowing irrigation flow. The distal end of the sleeve is closed by a cap of reduced diameter. The reduced diameter of the cap seals the distal end of the cannula. The relatively soft cap reduces the likelihood that the posterior capsule will tear during cortical clean-up and capsule polishing. Removing the sleeve allows the 30 cannula to be resterilized an unlimited number of times, thereby allowing unlimited reuse of the cannula.
One objective of the present invention is to provide an irrigation/aspiration tip that reduces the likelihood of tearing the posterior capsule.
Re: 3170 US
Another objective of the present invention is to provide an aspiration tip having an open lumen sealed with a flexible cap.
Other objectives, features and advantages of the present invention will become apparent with reference to the drawings, and the following description of the drawings s and claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. I is an expanded perspective view of a prior art aspiration tip.
io FIG. 2 is an enlarged cross-sectional view of the irrigation/aspiration tip of the present invention.
FIG. 3 is an enlarged cross-sectional view of the irrigation/aspiration tip of the present invention.
FIG. 4 is an enlarged perspective view of the irrigation/aspiration tip of the is present invention installed on a handpiece.
DETAILED DESCRIPTION OF THE PRFERRED EMBODIMENTS
As best seen in FIG. 1, prior art aspiration tip 10 consists of aspiration cannula 20 12 and cap 14. Cannula 12 is open at distal end 18 and is attached to hub 16 at proximal end 22. Hub 16 allows aspiration tip 10 to be attached to an appropriate handpiece (not shown). Distal end 18 is sealed by cap 14. Cap 14 is generally tubular in shape, is open on proximal end 24 and closed on distal end 26 except for port 20.
As best seen in FIGS. 2, 3 and 4, irrigation aspiration tip 100 of the present 25 invention generally includes aspiration cannula 112 and sleeve 114. Cannula 112 is open at distal end 118 and is attached to hub 116 at proximal end 122. Hub 116 allows aspiration tip 100 to be attached to handpiece 140. Distal end 118 of cannula 112 is sealed by reduced diameter end cap 115, which is integrally formed at distal end 119 of shaft 121 of sleeve 114. End cap 115 is generally tubular in shape and 30 closed on distal end 126 except for port 120. The reduced diameter of end cap 115 causes end cap 115 to seal tightly about distal end 118 of cannula 112. Sleeve forms coaxial gap 130 around cannula 112. Gap 130 allows irrigation flow down gap 130 and out ports 132. When vacuum is applied to interior lumen 136 of cannula 112, Re: 3170 US
material can be aspirated through port 120, down interior lumen 136 and out of tip 110.
While certain embodiments of the present invention have been described above, these descriptions are given for purposes of illustration and explanation.
s Variations, changes, modifications and departures from the systems and methods disclosed above may be adopted without departure from the scope or spirit of the present invention.
Claims (2)
1. An irrigation/aspiration tip, comprising:
a) an open aspiration cannula, the cannula having a hub enabling attachment of the cannula to a handpiece and an open end opposite the hub;
and b) a sleeve, the sleeve coaxially surrounding the cannula and having a shaft, the shaft having an end cap of reduced diameter, the end cap sealing about the open end of the cannula.
a) an open aspiration cannula, the cannula having a hub enabling attachment of the cannula to a handpiece and an open end opposite the hub;
and b) a sleeve, the sleeve coaxially surrounding the cannula and having a shaft, the shaft having an end cap of reduced diameter, the end cap sealing about the open end of the cannula.
2. The irrigation/aspiration tip of claim 1 where in the sleeve is removable from the cannula.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/621,395 US7967775B2 (en) | 2007-01-09 | 2007-01-09 | Irrigation/aspiration tip |
US11/621,395 | 2007-01-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2617036A1 true CA2617036A1 (en) | 2008-07-09 |
CA2617036C CA2617036C (en) | 2013-09-17 |
Family
ID=39156524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2617036A Expired - Fee Related CA2617036C (en) | 2007-01-09 | 2008-01-07 | Irrigation/aspiration tip |
Country Status (8)
Country | Link |
---|---|
US (1) | US7967775B2 (en) |
EP (1) | EP1943990B1 (en) |
JP (1) | JP4950081B2 (en) |
AT (1) | ATE461683T1 (en) |
AU (1) | AU2008200100B2 (en) |
CA (1) | CA2617036C (en) |
DE (1) | DE602008000846D1 (en) |
ES (1) | ES2340101T3 (en) |
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-
2007
- 2007-01-09 US US11/621,395 patent/US7967775B2/en active Active
-
2008
- 2008-01-07 CA CA2617036A patent/CA2617036C/en not_active Expired - Fee Related
- 2008-01-08 AT AT08100179T patent/ATE461683T1/en not_active IP Right Cessation
- 2008-01-08 DE DE602008000846T patent/DE602008000846D1/en active Active
- 2008-01-08 AU AU2008200100A patent/AU2008200100B2/en not_active Ceased
- 2008-01-08 ES ES08100179T patent/ES2340101T3/en active Active
- 2008-01-08 EP EP08100179A patent/EP1943990B1/en active Active
- 2008-01-09 JP JP2008001885A patent/JP4950081B2/en active Active
Also Published As
Publication number | Publication date |
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US7967775B2 (en) | 2011-06-28 |
US20080167604A1 (en) | 2008-07-10 |
DE602008000846D1 (en) | 2010-05-06 |
EP1943990B1 (en) | 2010-03-24 |
CA2617036C (en) | 2013-09-17 |
JP2008168130A (en) | 2008-07-24 |
ATE461683T1 (en) | 2010-04-15 |
ES2340101T3 (en) | 2010-05-28 |
EP1943990A1 (en) | 2008-07-16 |
AU2008200100A1 (en) | 2008-07-24 |
JP4950081B2 (en) | 2012-06-13 |
AU2008200100B2 (en) | 2009-11-12 |
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