Handheld ocular aspiration tool
AssigneeNovartis AG
InventorJohn Richard Carpenter
Life of this patent
Estimating the term…
Abstract
A variety of systems, processes, and techniques may provide ocular aspiration. In certain implementations, a handheld ocular aspiration tool may include an electrical motor, a peristaltic pump assembly, a fluid input port, and a fluid output port. The peristaltic pump assembly may include a helically wound compressible conduit and a plurality of variable radius rollers. The rollers may be configured to increasingly occlude the conduit as the rollers are rotated in contact with the conduit, wherein two rollers substantially occlude the conduit at one time to pump fluid through the conduit. The fluid input port may be in fluid communication with an input end of the peristaltic pump assembly, and the fluid output port may be in fluid communication with an output end of the peristaltic pump assembly.
Claims14
A handheld ocular aspiration tool comprising:
- an electrical motor;
- a peristaltic pump assembly comprising:
- a helically wound compressible conduit;
- and
- at least one variable radius roller, the at least one variable radius roller configured to increasingly occlude the conduit as the roller is rotated in contact with the conduit, the at least one variable radius roller operable to substantially fully occlude the conduit at one time to pump fluid through the conduit;
- a fluid input port in fluid communication with an input end of the peristaltic pump;
- and
- a fluid output port in fluid communication with an output end of the peristaltic pump.
A peristaltic pump for ocular surgery, the peristaltic pump comprising:
- an armature;
- a plurality of rollers rotatably coupled to the armature, each of the plurality of rollers comprising a first radius portion and a second radius portion;
- a flexible conduit;
- and
- a casing surrounding the armature and the plurality of rollers, the casing comprising a helical groove configured to receive the flexible conduit and guide the flexible conduit around the armature and the plurality of rollers, the helical groove positioning the conduit such that the flexible conduit is in a substantially open condition when contacted by the first radius portion of a roller of the plurality of rollers in a first location of the helical groove and in a substantially fully occluded condition when contacted by the second radius portion of the roller of the plurality of rollers in a second location of the helical groove.
Dependencies are inferred from the claim text.