CA2187561C - Surgical cassette loading and unloading system - Google Patents

Surgical cassette loading and unloading system Download PDF

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Publication number
CA2187561C
CA2187561C CA002187561A CA2187561A CA2187561C CA 2187561 C CA2187561 C CA 2187561C CA 002187561 A CA002187561 A CA 002187561A CA 2187561 A CA2187561 A CA 2187561A CA 2187561 C CA2187561 C CA 2187561C
Authority
CA
Canada
Prior art keywords
peristaltic pump
roller head
pump tube
cassette
surgical
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.)
Expired - Lifetime
Application number
CA002187561A
Other languages
French (fr)
Other versions
CA2187561A1 (en
Inventor
Richard L. Ii Zaleski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcon Vision LLC
Original Assignee
Alcon Laboratories Inc
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 Alcon Laboratories Inc filed Critical Alcon Laboratories Inc
Publication of CA2187561A1 publication Critical patent/CA2187561A1/en
Application granted granted Critical
Publication of CA2187561C publication Critical patent/CA2187561C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • 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
    • A61M1/71—Suction drainage systems
    • A61M1/72—Cassettes forming partially or totally the fluid circuit
    • 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
    • A61M1/80—Suction pumps
    • A61M1/82—Membrane pumps, e.g. bulbs
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/12—Pressure infusion

Abstract

The present invention relates to a system for loading and unloading a surgical cassette having a peristaltic pump tube from a cassette receiving portion of a surgical console. The system is comprised of a peristaltic pump roller head having a flared and beveled notch, the roller head being located in the cassette receiving portion of the surgical console. An extendable cylinder within the cassette receiving portion of the surgical console is aligned so as to engage the peristaltic pump tube. A surgical console is also provided.
The console is comprised of a peristaltic pump roller head having a flared and beveled notch.
A cassette is provided having a peristaltic pump tube stretched over the peristaltic pump roller head. An extendable cylinder is aligned so as to engage the peristaltic pump tube.

Description

SURGICAL CASSETTE LOADING AND UNLOADING SYSTEM
Background of the Invention The present invention relates to surgical cassettes and more particularly to a system for loading and unloading surgical cassettes.
The use of cassettes with surgical instruments to help manage irrigation and aspiration flows into a surgical site are well-known. U.S. Patent Nos. 4,493,695, 4,627,833 (Cook), U.S.
Patent No. 4,395,258 (Wang, et al.), U.S. Patent No. 4,713,051 (Steppe, et al.), U.S. Patent No. 4,798,850 (DeMeo, et al.), U.S. Patent Nos. 4,758,238, 4,790,816 (Sundblom, et al.) and U.S. Patent Nos. 5,267,956, 5,364,342 (Beuchat) all disclose tubeless or tube-type surgical cassettes.
One of the primary function of the cassettes disclosed above is to control aspiration (vacuum) level at the surgical site. The vacuum generating device generally is contained within the surgical system control console and may be a venturi, diaphragm or peristaltic pump. When a peristaltic pump is used, the cassette generally contains a peristaltic pump tube that may be compressed within a race by a rotating pump roller head (e.g. U.S.
Patent No. 4,713,051, Steppe, et al.) or may be stretched over the rotating pump roller head (e.g.
U.S. Patent Nos. 5,267,956 and 5,364,342, Beuchat). When the pump tube is stretched over the roller head, it may be difficult not only to install the pump tube over the roller head, but also to remove the pump tube from the roller head. The operation of peristaltic pump roller heads, and particularly peristaltic pump roller heads used in ophthalmic instruments, is more fully disclosed in U.S. Patent No. 5,230,614 (Zanger, et al.), and U.S. Patent No. 5,387,088 (Knapp, et al.).
Accordingly, a need exists for a system to assist in loading and unloading a surgical cassette.
Brief Description of the Invention The present invention includes a peristaltic pump roller head with a flared and beveled notch in combination with a plunger or probe that engages the cassette peristaltic ~18'~~6~.
Z
pump tube. When the cassette is installed in the console, the roller head is rotated so that the flared notch of the roller head engages the tube and pulls the tube over the roller head.
When the cassette is removed from the console, the roller head is counter-rotated while the plunger telescopes to push the pump tube away from the roller head. The counter-s rotation of the roller head together with the bevel on the roller head and the action of the plunger disengages the pump tube from the roller head.
Accordingly, one objective of the present invention is to provide a system for simplifying the loading and unloading of surgical cassettes.
Another objective of the present invention is to provide a system for loading a peristaltic pump tube onto a peristaltic pump roller head.
Still another objective of the present invention is to provide a system for unloading a peristaltic pump tube from a peristaltic pump roller head.
These and other objectives and advantages of the present invention will become apparent from the detailed description and claims which follow.
~s Brief Description of the Drawings FIG. 1 is an exploded perspective view of the present invention.
FIG. 2 is an exploded perspective view of the present invention, similar to FIG. 1 but depicting the peristaltic pump tube engaged on the peristaltic pump roller head.
FIG. 3 is a partial elevational view of the present invention depicting the peristaltic zo pump tube engaged on the peristaltic pump roller head.
FIG. 4 is a cross-sectional view of the present invention taken along line 4-4 in FIG. 3.
FIG. 5 is a cross-sectional view of the present invention taken along line 5-5 in FIG. 3.
zs Detailed 'Description of the Invention As best seen in FIGS. l and 2, system 10 of the present invention generally consists of roller head 12 and plunger assembly 14. Roller head 12 generally consists of inner plate 16 and outer plate 18 joined by a plurality of rollers 20. Outer plate 18 contains notch 22 and, as best seen in FIG. 4, outer plate 18 has flared portion 24 and ~18'~~~1 beveled portion 40, both bordering notch 22. Notch 22, flared portion 24 and beveled portion 40 operate to assist in the loading and unloading of peristaltic pump tube 26 in the manner described below.
Plunger assembly 14 generally consists of cylinder 28 and tip 30. Cylinder 28 may s be any of a variety of electrically or hydraulically extendable cylinders, but a pneumatic cylinder with a power generation range of between 4.0 pound-feet and 5.0 pound-feet, and an extension range of between 0 inches and 0.4 inches is preferred. Suitable cylinders 28 are commercially available from sources such as American Cylinder Company, Inc. Tip 30 preferably is approximately 1 inch long and made from aluminum or an aluminum alloy. As can be seen in FIGS. 1, 2 and 5, tip 30 contains an arcuate cutout 32 of approximately the same radius as pump tube 26 (e.g., 0.125 inches) so that tip 30 engages pump tube 26 without slipping ofd In use, cassette 34 containing pump tube 26 is installed within cassette receiving portion 36 of surgical console 38 so that pump tube 26 is pressed against outer plate 18 of ~s roller head 12. In order to provide peristaltic pumping action, pump tube 26 must be stretched over rollers 20 contained in roller head 12. To assist is this process, flared portion 24 of outer plate 18 projects out from outer plate 18. As roller head 12 is rotated, flared portion 24 engages pump tube 26, thereby threading pump tube 26 over rollers 20.
To disengage pump tube 26 from rollers 20, cylinder 28 is extended so that arcuate ao cutout 32 on tip 30 engages pump tube 26 (as seen in FIGS. 3, 4 and 5).
Further extension of cylinder 28 pushes pump tube 26 away from cassette receiving portion 36 of console 38. When roller head 12 is counter-rotated, flared portion 24 and beveled portion 40 of outer plate 18 unthreads pump tube 26 from rollers 20.
This description is given for purposes of illustration and explanation. It will be zs apparent to those skilled in the relevant art that changes and modifications may be made to the invention described above without departing from its scope or spirit.

Claims (2)

1. A system for loading and unloading a surgical cassette having a peristaltic pump tube from a cassette receiving portion of a surgical console, comprising:
a) a peristaltic pump roller head having a flared and beveled notch, the roller head being located in the cassette receiving portion of the surgical console; and b) an extendable cylinder within the casette receiving portion of the surgical console aligned so as to engage the peristaltic pump tube.
2. A surgical console, comprising:
a) a peristaltic pump roller head having a flared and beveled notch;
b) a cassette having a peristaltic pump tube stretched over the peristaltic pumproller head; and c) an extendable cylinder aligned so as to engage the peristaltic pump tube.
CA002187561A 1995-11-15 1996-10-10 Surgical cassette loading and unloading system Expired - Lifetime CA2187561C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US559,016 1995-11-15
US08/559,016 US5588815A (en) 1995-11-15 1995-11-15 Surgical cassette loading and unloading system

Publications (2)

Publication Number Publication Date
CA2187561A1 CA2187561A1 (en) 1997-05-16
CA2187561C true CA2187561C (en) 2002-01-15

Family

ID=24231942

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002187561A Expired - Lifetime CA2187561C (en) 1995-11-15 1996-10-10 Surgical cassette loading and unloading system

Country Status (8)

Country Link
US (1) US5588815A (en)
EP (1) EP0774266B1 (en)
JP (1) JPH09220279A (en)
AT (1) ATE206317T1 (en)
AU (1) AU702010B2 (en)
CA (1) CA2187561C (en)
DE (1) DE69615633T2 (en)
ES (1) ES2164203T3 (en)

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JPH09220279A (en) 1997-08-26
EP0774266A3 (en) 1997-07-02
ES2164203T3 (en) 2002-02-16
AU702010B2 (en) 1999-02-11
US5588815A (en) 1996-12-31
AU7025196A (en) 1997-05-22
ATE206317T1 (en) 2001-10-15
DE69615633D1 (en) 2001-11-08
DE69615633T2 (en) 2002-07-11
CA2187561A1 (en) 1997-05-16
EP0774266A2 (en) 1997-05-21
EP0774266B1 (en) 2001-10-04

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