# US 12,178,749 B2 · Ophthalmic pressure control system, a kit of parts and a method

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- Number: US 12,178,749 B2
- Document ID: US12178749B2
- Status: Granted
- Kind: B2
- Application number: 17/703,526
- Filed: 2022-03-24
- Published: 2022-07-07
- Granted: 2024-12-31
- Earliest claimed: 2019-03-08
- Assignees: D.O.R.C. Dutch Ophthalmic Research Center (International) B.V.
- Applicants: D.O.R.C. Dutch Ophthalmic Research Center (International) B.V.
- Inventors: John Peter Kuntz; Andres Alberto Alvarez Cabrera; Wim Rosenquist
- Web page: https://patentgrep.com/patent/US12178749B2

## CPC

- A61F 9/00736: {Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments (A61F9/008 takes precedence)}
- 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)}
- A61M 3/0202: {with electronic control means or interfaces}
- A61M 3/0208: {before use}
- A61M 3/0216: {Pressure}
- A61B 3/16: for measuring intraocular pressure, e.g. tonometers
- A61B 5/036: {by means introduced into body tracts (A61B5/032 and A61B5/035 take precedence)}
- A61F 2250/0013: for adjusting fluid pressure
- A61F 2250/006: modular
- A61M 1/74: {Suction control (underwater drainage A61M1/61)}
- A61M 2205/3334: Measuring or controlling the flow rate
- A61M 2210/0612: Eyes
- 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)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The invention relates to an ophthalmic pressure control system, comprising: a pressure regulator having an input port and an output port, and an infusion line having a proximal end and a distal end, the proximal end being connected to the output port of the pressure regulator, and the distal end being detachably connected to an ophthalmic irrigation module. Further, the system includes a control unit driving the pressure regulator for controlling an infusion fluid pressure at a distal end of the ophthalmic irrigation module. The control unit is arranged for performing a fluid calibration process including a step of determining a fluid impedance of the ophthalmic irrigation module. The infusion line is associated with a kit of parts including a first and a second ophthalmic irrigation device, or the ophthalmic irrigation module is an ophthalmic irrigation device for surgical use.

## Claims

### Claim 1

A method of controlling an infusion liquid pressure at a distal end of an ophthalmic irrigation module, comprising the steps of:
providing a fluid pressure regulator having an input port and an output port;
providing an infusion line having a proximal end and a distal end, the proximal end being connected to the output port of the pressure regulator;
detachably connecting the distal end of the infusion line to an ophthalmic irrigation module;
providing a control unit driving the fluid pressure regulator for controlling an infusion fluid pressure at a distal end of the ophthalmic irrigation module, and
performing a fluid calibration process including a step of determining a fluid impedance of the ophthalmic irrigation module, wherein the ophthalmic irrigation module is an ophthalmic irrigation device for surgical use.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising a step of comparing the determined fluid impedance with a multiple number of predetermined fluid impedance calibration reference values associated with corresponding types of ophthalmic irrigation devices for surgical use.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the predetermined fluid impedance calibration reference values match with the fluid impedances of the corresponding types of ophthalmic irrigation devices for surgical use.

### Claim 4 (depends on 2)

The method according to claim 2, wherein the predetermined fluid impedance reference values are different from but in a unique manner related to the fluid impedances of the corresponding types of ophthalmic irrigation devices for surgical use.