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EP-4741657-A2 - IRRIGATION/ASPIRATION PUMP HEAD AND BLADDER DESIGN AND METHODS

EP4741657A2EP 4741657 A2EP4741657 A2EP 4741657A2EP-4741657-A2

Abstract

A system for a surgical system is disclosed, comprising a system for distributing fluid in a surgical cassette, comprising a first pump head operable by a first drive shaft and a second pump head operable by a second drive shaft, wherein the second drive shaft is at least partially enclosed by the first drive shaft.

Inventors

  • DUNNE, JOHN C.
  • AULD, JACK
  • FLOWERS, MATTHEW
  • HUCULAK, JOHN

Assignees

  • Johnson & Johnson Surgical Vision, Inc.

Dates

Publication Date
20260513
Application Date
20201216

Claims (14)

  1. A system for distributing fluid in a surgical cassette, comprising: a first pump head operable by a first drive shaft; and a second pump head operable by a second drive shaft; wherein the second drive shaft is at least partially enclosed by the first drive shaft.
  2. The system of claim 1, wherein the first drive shaft is operated on by a first motor.
  3. The system of claim 1 or 2, wherein the second drive shaft is operated on by a second motor.
  4. The system of any preceding claim, wherein the first pump head and second pump head rotate about the same axis.
  5. The system of any preceding claim, wherein the first pump head and second pump head rotate at different speeds.
  6. The system of any preceding claim, wherein the first pump head and second pump head rotate in different directions.
  7. The system of any preceding claim, wherein the first pump head comprises a plurality of rollers.
  8. The system of any preceding claim, wherein the second pump head comprises a plurality of rollers.
  9. The system of any preceding claim, wherein a roller communicatively coupled to one of the first pump head or second pump head operably restricts fluid flow in a channel in contact with the roller.
  10. The system of any preceding claim, wherein the first pump head and second pump head do not share a horizontal plane.
  11. The system of any of claims 1 to 6, 9 or 10, wherein the first pump head comprises a radially outermost pump head with a vertically disposed surface which includes a first plurality of roller assemblies, each roller assembly containing one of a plurality of first rollers, and the second pump head comprises a radially inner pump head with a non-linear shape and a second plurality of roller assemblies, each roller assembly containing one of a plurality of second rollers.
  12. The system of claim 11, wherein the second pump head is shaped as a conical frustum.
  13. The system of claim 11 or 12, wherein each pump head is spring loaded such that each pump head has the ability to adjust to the orientation of a mating cassette.
  14. The system of any of claims 11 to 14, wherein each roller of the first and/or second rollers has a conical geometry.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Patent Application No. 62/949428, filed December 17, 2019, which is incorporated herein by reference in its entirety. BACKGROUND OF THE INVENTION Field of Technology The present invention relates generally to a system for distributing fluid in a surgical cassette, comprising a first pump head operable by a first drive shaft and a second pump head operable by a second drive shaft, wherein the second drive shaft is at least partially enclosed by the first drive shaft. Description of the Background The optical elements of the eye include both a cornea (at the front of the eye) and a lens within the eye. The lens and cornea work together to focus light onto the retina at the back of the eye. The lens also changes in shape, adjusting the focus of the eye to vary between viewing near objects and far objects. The lens is found just behind the pupil and within a capsular bag, the capsular bag being a thin, relatively delicate structure which separates the eye into anterior and posterior chambers. With age, clouding of the lens or cataracts is fairly common. Cataracts may form in the hard central nucleus of the lens, in the softer peripheral cortical portion of the lens, or at the back of the lens near the capsular bag. Cataracts can be treated by the replacement of the cloudy lens with an artificial lens. Phacoemulsification systems often use ultrasound energy to fragment the lens and aspirate the lens material from within the capsular bag. This may allow the capsular bag to be used for positioning of the artificial lens, and maintains the separation between the anterior portion of the eye and the vitreous humor in the posterior chamber of the eye. During cataract surgery and other therapies of the eye, accurate control over the volume of fluid within the eye is highly beneficial. For example, while ultrasound energy breaks up the lens and allows it to be drawn into a treatment probe with an aspiration flow, a corresponding irrigation flow may be introduced into the eye so that the total volume of fluid in the eye does not change excessively. If the total volume of fluid in the eye is allowed to get too low at any time during the procedure, the eye may collapse and cause significant tissue damage. Similarly, excessive pressure within the eye may strain and injure tissues of the eye. While a variety of specific fluid transport mechanisms may be used in phacoemulsification and other treatment systems for the eyes, aspiration flow systems can generally be classified in two categories: 1) volumetric-based aspiration flow systems using positive displacement pumps (e.g. peristaltic); and 2) vacuum-based aspiration systems using a vacuum source, typically applied to the aspiration flow through an air-liquid interface within a reservoir (e.g. Venturi). Both systems may be incorporated into one treatment system and/or cassette. Cassette ("pack") systems can be used to couple peristaltic pump drive rotors and/or vacuum systems of the surgical consoles to an eye treatment handpiece, with the flow network conduit of the cassette being disposable to avoid cross-contamination between different patients. To mitigate any such occurrences of cross-contamination between different patients, staff operating a system typically begin each procedure with a fresh cassette and irrigation source prior to each case and monitor the fluid visually throughout surgery. However, conventional configurations do not efficiently provide for easily exchangeable cassettes which can optimally perform certain intended functions. As such, improvements are needed in the art to address these issues. SUMMARY A surgical system is disclosed, comprising a system for distributing fluid in a surgical cassette, comprising a first pump head operable by a first drive shaft and a second pump head operable by a second drive shaft; wherein the second drive shaft is at least partially enclosed by the first drive shaft. Under another exemplary embodiment, a method for distributing fluid in a surgical cassette is disclosed. The method comprises rotating a first pump head by a first drive shaft and rotating a second pump head by a second drive shaft, wherein the first pump head and second pump head rotate about the same axis. The first drive shaft may be operated on by a first motor and the second drive shaft may be operated on by a second motor. The second drive shaft may be at least partially enclosed by the first drive shaft. DESCRIPTION OF THE DRAWINGS The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate disclosed embodiments and/or aspects and, together with the description, serve to explain the principles of the invention, the scope of which is determined by the claims. FIG. 1A is a schematic illustrating an eye treatme