Ophthalmic aspirator-irrigator
First Claim
1. An ophthalmic aspirator-irrigator comprising:
- (a) a hand-held device;
(b) said device including a cannula having an axial channel and a surrounding annular channel, pressure-differential creating means connected to said axial channel, and drive means operatively connected to said last means for driving the same;
(c) a source of fluid connected via a flexible tube to said annular channel;
(d) foot-operable control means for controlling the operation of said drive means and provided with a pedal, a power source, a circuit connected to said source, and a socket coupled to said circuit;
(e) a flexible power cord having a plug designed to be connected to said socket for coupling power from said power source to said drive means; and
(f) a container enclosing said cannula and said pressure-differential creating means;
(g) said foot-operable control means being portable and said power source comprising a battery pack.
1 Assignment
0 Petitions
Accused Products
Abstract
An ophthalmic aspirator-irrigator system for use during cataract surgery is disclosed. The system frees both hands of the surgeon for the surgical tasks and leaves the automatic operation of the system to a single control input operated by a foot pedal. The pedal controls both the aspiration and ejection functions as well as their respective speeds. The opthalmic aspirator-irrigator system essentially comprises a hand-held device, a control box operable by the foot pedal and a power cord connecting the device with the box. A source of fluid is connected via a tube to the device to effect the irrigation function. The control box includes a power source and a circuit coupled to the source and via the cord to the device. Preferably, the circuit includes a bridge output network controlled by a linear motion slide type potentiometer controlled by the foot pedal. The circuit further includes dual DC amplifiers and a pulse-width modulated gate circuit to operate the device bidirectionally with a smooth, continuous and varibale speed. The foot pedal has two zero control positions: in its off, non-depressed position and in its off position about midway through the pedal'"'"'s downward travel.
143 Citations
18 Claims
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1. An ophthalmic aspirator-irrigator comprising:
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(a) a hand-held device; (b) said device including a cannula having an axial channel and a surrounding annular channel, pressure-differential creating means connected to said axial channel, and drive means operatively connected to said last means for driving the same; (c) a source of fluid connected via a flexible tube to said annular channel; (d) foot-operable control means for controlling the operation of said drive means and provided with a pedal, a power source, a circuit connected to said source, and a socket coupled to said circuit; (e) a flexible power cord having a plug designed to be connected to said socket for coupling power from said power source to said drive means; and (f) a container enclosing said cannula and said pressure-differential creating means; (g) said foot-operable control means being portable and said power source comprising a battery pack. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An ophthalmic aspirator-irrigator comprising:
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(a) a hand-held device; (b) a pressure-differential creating means coupled via a flexible tube to said device; (c) a foot-operable control box; (d) a power cord for operatively connecting said control box to said pressure differential creating means; (e) a collection pouch coupled to said pressure-differential creating means for collecting material aspirated by said device; (f) a source of fluid connected via a flexible tube to said hand-held device; and (g) fastening means respectively provided for said pressure-differential creating means and said collection pouch, to secure them respectively adjacent a surgical site; (h) said foot-operable control box provided with a pedal and including a power source and a circuit. - View Dependent Claims (9, 10, 11)
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12. An ophthalmic aspirator-irrigator comprising:
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(a) a hand-held device including a cannula, a pressure-differential creating means connected to said cannula, drive means for bidirectionally driving said pressure-differential creating means, and connecting means for releasably securing said cannula to said pressure-differential creating means; (b) a portable control box for controlling both the speed and the direction of said drive means and provided with a foot pedal having an arc of displacement, a power source, and a circuit coupled via a switch to said foot pedal and said power source; (c) a flexible power cord connecting said power source to said drive means; (d) said circuit including a linear motion slide type potentiometer operatively connected to said foot pedal and generating a voltage linearly proportional to the position of said pedal along its said arc of displacement, dual DC amplifiers coupled to said potentiometer to receive said voltage at one of their inputs, a reference voltage connected to the other inputs of said amplifiers, switch means coupled to the outputs of said amplifiers, a pulse-width modulated gate circuit coupled to the output of said switch means, a bridge circuit operatively connected via said flexible power cord to said drive means, and a direction control switch coupling the output of said pulse-width modulated gate circuit to said bridge circuit. - View Dependent Claims (13, 14, 15)
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16. An ophthalmic aspirator-irrigator comprising:
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(a) a hand-held device; (b) said device including a cannula formed with a hollow cone and a concentric needle, said needle having a central channel in communication with said hollow cone at one end and terminating in a port at the other end and an annular channel surrounding said central channel and terminating in a pair of irrigation openings at its free end; (c) a pressure-differential creating means operatively connected to said hollow cone and drive means for said pressure-differential creating means mounted adjacent thereto; (d) a foot operable control box including a source of power; (e) a power cord for operatively connecting said pressure differential creating means to said control box; and (f) a source of fluid connected via a flexible tube to said annular channel of said cannula; (g) said foot-operable control box provided with a foot pedal, a jack for said power cord, visible and manually operable test means for said source of power, an audio signal generating means, means for varying the intensity of said audio signal, and further including a power source and a circuit. - View Dependent Claims (17, 18)
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Specification