Compact cassette for ophthalmic surgery
First Claim
1. For use in a pumping control system for ophthalmic surgery having clamp actuator controls and an intermediate vent port in an interface slot below a mount face at the upper region of which a peristaltic pump is to engage a loop of tubing from a cassette installed in the mount face, a cassette device comprising:
- an adapter element having a plate surface engageable against the mount face between the pump and interface slot, and including a shoulder extending proximally from the plate surface and offset to one side of the pump, the shoulder including a receiving opening adjacent one side of the mount face; and
a cassette including a lower wall engageable in the interface slot, a distal wall engageable against the plate surface, and an upper wall engageable against the shoulder, the cassette further including flexible tubing accessible to the clamp actuator controls through the lower wall, an upper shoulder offset to the opposite side of the pump from the shoulder of the adapter element, and a flexible tubing length extending from the upper shoulder to the receiving opening of the adapter element, to wrap about the peristaltic pump.
7 Assignments
0 Petitions
Accused Products
Abstract
A cassette configuration, operative parts of which may be disposable or resterilizable, is configured with an adapter that may be mounted within the cassette receiving portal of a console that uses a peristaltic pump spaced apart from actuator and vent controls to engage the lower end wall of a cassette. The adapter is asymmetrically mounted in the available space, and allows a tubing loop from one side of a cassette inserted under it to be threaded through the peristaltic pump and to be seated in a bore in the adapter on the opposite side. A lower edge of the cassette fits into an interface slot in the console, and the interior tubing configuration enables clamping of irrigation and vent lines, while providing aspiration and irrigation flows to and from a handpiece. Within the cassette or in the console, flow control elements are provided to enable alternative venting of either air or fluid into the aspiration system to prevent excessive suction at the operative site. At the same time, the flow system and the pressure sensing and venting arrangement are configured to allow resterilization of the cassette if desired.
97 Citations
13 Claims
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1. For use in a pumping control system for ophthalmic surgery having clamp actuator controls and an intermediate vent port in an interface slot below a mount face at the upper region of which a peristaltic pump is to engage a loop of tubing from a cassette installed in the mount face, a cassette device comprising:
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an adapter element having a plate surface engageable against the mount face between the pump and interface slot, and including a shoulder extending proximally from the plate surface and offset to one side of the pump, the shoulder including a receiving opening adjacent one side of the mount face; and a cassette including a lower wall engageable in the interface slot, a distal wall engageable against the plate surface, and an upper wall engageable against the shoulder, the cassette further including flexible tubing accessible to the clamp actuator controls through the lower wall, an upper shoulder offset to the opposite side of the pump from the shoulder of the adapter element, and a flexible tubing length extending from the upper shoulder to the receiving opening of the adapter element, to wrap about the peristaltic pump. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a cassette for providing an irrigation flow to a handpiece and receiving an aspiration flow under a suction from the handpiece, wherein the cassette includes an occludable shunt coupling between the suction source and the irrigation flow, to provide a fluid flow to relieve suction, an arrangement for providing alternative usage of fluid flow or air flow to the aspiration flow comprising:
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an air vent conduit system disposed to receive air; and a selectable position valve device having an positionable valve element movable between air selection and fluid selection positions, the valve element being coupled to receive irrigation fluid flow, and air flow at different input positions, and coupled to the occludable aspiration line at a third output position, the valve element including sealing elements disposed to block unwanted fluid flow between positions, while coupling the fluid input to the output in a first position, and coupling the air input to the output in the second position. - View Dependent Claims (8, 9)
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10. A tubing configuration for a cassette for ophthalmic surgery applications, the cassette being of the type having a housing, an edge wall on the housing along a first side and a pump loop extending from an edge wall on a second side, the edge wall on the first side including a pair of spaced apart actuator access apertures and an intermediate vent aperture, and the cassette further including internal bosses adjacent the actuator access apertures and flexible tubing wrapped around the bosses to be clamped against the bosses by external actuators;
- the cassette further including an irrigation input line, an aspiration line and a waste line from the pump loop, the cassette further including flexible vent tubing coupled to receive irrigation input and wrapped around a first of the bosses before coupling to the pump loop to enable irrigation fluid to be supplied to the pump loop for breaking suction upon command, comprising;
an air vent input line; a selectable position valve element coupled to the air input line and coupled to the irrigation input flow at a different position, the selectable position valve also being coupled to the vent tubing at a third position, the valve being operable to couple either the air input line or the irrigation input line to the first occludable line, by change of position.
- the cassette further including an irrigation input line, an aspiration line and a waste line from the pump loop, the cassette further including flexible vent tubing coupled to receive irrigation input and wrapped around a first of the bosses before coupling to the pump loop to enable irrigation fluid to be supplied to the pump loop for breaking suction upon command, comprising;
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11. A system for controlling relief of suction in a cassette having a conduit subjected to a suction force, comprising the combination of:
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a venting connection coupled to the suction line; a first vent line coupled to the venting connection and open to air; a second vent line coupled to the venting connection and open to fluid; and control means normally maintaining the vent lines closed and selectably allowing one of the vent lines to open. - View Dependent Claims (12, 13)
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Specification