# US 9,517,162 B2 · Retinal surgery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,162 B2 - Document ID: US9517162B2 - Status: Granted - Kind: B2 - Application number: 13/307,658 - Filed: 2011-11-30 - Published: 2013-05-30 - Granted: 2016-12-13 - Earliest claimed: 2011-11-30 - Assignees: Alcon Research, Ltd. - Applicants: John Christopher Huculak; Michael McCulloch Martin; Michael Arthur Zica; Matthew Edward Bazydlo - Inventors: John Christopher Huculak; Michael McCulloch Martin; Michael Arthur Zica; Matthew Edward Bazydlo - Web page: https://patentgrep.com/patent/US9517162B2 ## CPC - A61F 9/00821: {for coagulation} - A61F 9/00736: {Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments (A61F9/008 takes precedence)} - A61M 1/74: {Suction control (underwater drainage A61M1/61)} - A61M 1/77: {Suction-irrigation systems (aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463)} - A61F 9/00727: {Apparatus for retinal reattachment} - A61M 2205/3344: Measuring or controlling pressure at the body treatment site - A61M 2210/0612: Eyes - F04C 2270/041: Controlled or regulated - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract Systems, processes, and computer program products may be used to perform retinal surgery. In particular implementations, a system, a process, and a computer program product may include the ability to inject a retina manipulation fluid into an eye through an injection/extraction system and apply negative pressure to the injection/extraction system to facilitate extraction of fluid from the eye. The system, the process, and the computer program product may also include the ability to adjust the applied negative pressure. ## Claims ### Claim 1 A system comprising: an injection and extraction system adapted to inject a retina manipulation fluid into an eye through a first channel and extract fluid from the eye through a second channel, the first channel extending distally beyond the second channel to form an annular opening between the first channel and the second channel; a fluid extraction system adapted to apply negative pressure to the injection and extraction system to facilitate fluid extraction; a computer system adapted to adjust the negative pressure applied by the fluid extraction system, and an infusion system adapted to inject infusion fluid to maintain the shape of the eye undergoing retinal surgery. ### Claim 2 (depends on 1) The system of claim 1, wherein the computer system is adapted to adjust the negative pressure based on intraocular pressure in the eye. ### Claim 3 (depends on 1) The system of claim 1, wherein the computer system is further adapted to control injection of the retina manipulation fluid through the injection and extraction system. ### Claim 4 (depends on 3) The system of claim 3, further comprising a fluid pressure system, the fluid pressure system controllable by the computer system to apply positive pressure to inject the retina manipulation fluid. ### Claim 5 (depends on 1) The system of claim 1, wherein the first channel is adapted to inject a fluid having a higher specific gravity than fluids for which the second channel is adapted to extract. ### Claim 6 (depends on 1) The system of claim 1, wherein the first channel is inside the second channel. ### Claim 7 (depends on 6) The system of claim 6, wherein the second channel serves as a cannula for introducing medical instruments into the eye. ### Claim 8 (depends on 1) The system of claim 1, wherein the injection and extraction system comprises a body through which the first channel passes and to which the second channel engages. ### Claim 9 (depends on 8) The system of claim 8, wherein the body comprises a cavity into which fluid extracted through the second channel enters. ### Claim 10 A method, comprising: injecting a retina manipulation fluid into an eye through a first channel of an injection and extraction system that extends distally beyond a second channel to form an annular opening between the first channel and the second channel, the retinal manipulation fluid having a higher specific gravity than other fluids within the eye; applying negative pressure to the injection and extraction system to facilitate extraction of fluid from the eye through the annular opening; adjusting, via a computer system, the applied negative pressure; and extracting the other fluids from the eye. ### Claim 11 (depends on 10) The method of claim 10, wherein adjusting the negative pressure is based on intraocular pressure in the eye. ### Claim 12 (depends on 11) The method of claim 11, further comprising injecting fluid to maintain the shape of the eye. ### Claim 13 (depends on 11) The method of claim 11, further comprising measuring the intraocular pressure. ### Claim 14 (depends on 10) The method of claim 10, further comprising controlling injection of the retina manipulation fluid through the injection and extraction system via the computer system. ### Claim 15 (depends on 11) The method of claim 11, wherein the computer system controls a fluid pressure system to apply positive pressure to inject the retina manipulation fluid. ### Claim 16 (depends on 10) The method of claim 10, wherein: the extracted fluid is extracted around the first channel. ### Claim 17 (depends on 16) The method of claim 16, wherein the second channel serves as a cannula for introducing medical instruments into the eye. ### Claim 18 (depends on 16) The method of claim 16, wherein the retina manipulation fluid, while in the first channel, passes through a first internal cavity of the injection and extraction system. ### Claim 19 (depends on 18) The method of claim 18, wherein the extracted fluid enters a second internal cavity of the injection and extraction system after passing through the second channel.