JPWO2020247165A5

JPWO2020247165A5 -

Info

Publication number: JPWO2020247165A5
Application number: JP2021572683A
Authority: JP
Publication date: 2023-05-18
Anticipated expiration: 2040-05-15

Claims

A medical device for removing lens tissue from within the lens capsule of an eye, comprising:
A housing of a size that can be held by hand,
a shaft extending distally from the housing and configured to oscillate relative to the housing, the shaft including a distal end region adapted to access a lens within the lens capsule of the eye; a shaft having a lumen;
a cam assembly operably coupled to a vacuum source disposed within the housing, a shaft operably coupled to the vacuum source to cause the vacuum source to generate a vacuum through the lumen; and a second portion operably coupled to said first portion and said shaft and rotatable about said axis with said first portion to oscillate said shaft. a cam assembly including,
a trigger on the housing configured to actuate rotation of the cam assembly;
with
the trigger is operably coupled to the latch and the piston stop;
A first stage of actuation of the trigger causes the vacuum source to create a vacuum within the lumen of the shaft, and a second stage of actuation of the trigger causes the shaft to vibrate as the second portion rotates. ,
Device.

said vacuum source comprising a plurality of pistons, each of said plurality of pistons being housed within a respective cylinder, each of said cylinders being fluidly coupled to said lumen of said shaft ;
The latch is configured to prevent the shaft from vibrating as the second portion rotates, and the piston stop is configured to limit proximal movement of the plurality of pistons within the respective cylinders. and said second stage of actuation of said trigger simultaneously releases said latch and rotates said piston stop away from said plurality of pistons to initiate shaft oscillation and pulsating vacuum;
A device according to claim 1 .

The latch is configured to prevent the shaft from oscillating with rotation of the second portion , and the second stage of actuation of the trigger releases the latch to rotate the second portion. allowing the shaft to vibrate as it rotates;
3. Apparatus according to claim 1 or 2 .

a proximal end of the shaft is coupled to a cutting holder having a distal surface, a proximal surface, and a top surface, the top surface defining a notch sized to receive the latch;
4. Apparatus according to claim 3 .

further comprising a cutting spline configured to abut against the proximal surface of the cutting holder, the cutting spline coupled to the second portion of the cam assembly;
5. Apparatus according to claim 4 .

the first stage of actuation of the trigger moves the trigger from a rest position to a suction-only position;
6. Apparatus according to claim 5.

when the latch is engaged in the notch of the cutting holder, the cutting holder and the shaft remain stationary during rotation of the second part;
6. Apparatus according to claim 5 .

the cam assembly is operably rotated by a motor disposed within the housing containing the cam assembly;
A device according to claim 1 .

the speed of the motor is variably controlled by the trigger on the housing;
9. Apparatus according to claim 8 .

said vacuum source comprising a plurality of pistons, each of said plurality of pistons being housed within a respective cylinder, each of said cylinders being fluidly coupled to said lumen of said shaft;
A device according to claim 1 .

The medical device further comprises a piston stop movably coupled to the trigger, the piston stop configured to limit proximal movement of the plurality of pistons within the respective cylinders.
11. Apparatus according to claim 10 .

the piston stop limits proximal travel of each piston to less than a maximum proximal travel within the respective cylinder to maintain the vacuum source in a low flow continuous aspiration mode;
12. Apparatus according to claim 11 .

said second stage of actuation of said trigger moves said piston stop relative to said plurality of pistons to switch said vacuum source to a discontinuous pulsating suction mode;
13. Apparatus according to claim 12 .

said discontinuous pulsating suction mode allows maximum proximal travel of each piston within said respective cylinder;
14. Apparatus according to claim 13.

wherein said medical device is configured to be fluidly coupled to a fluid system having a source of perfusion fluid, said medical device being fluidly coupled via a perfusion line;
A device according to claim 1 .

further comprising a bypass valve coupled to trigger actuation, said bypass valve opening prior to actuation of said trigger and closing during a first stage of actuation;
A device according to claim 1 .