CONTROL ARRANGEMENT FOR AN OPHTHALMIC SURGICAL SYSTEM

• US 20150202081A1
• Filed: 03/27/2015
• Published: 07/23/2015
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Carl Zeiss Meditec AG (Carl-Zeiss-Stiftung)
• Original Assignee: Carl Zeiss Meditec AG (Carl-Zeiss-Stiftung)
• Inventors: Eichler, Michael
• Granted Patent: US 10,028,861 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 9/00736 Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments A61F9/008 takes precedence
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/76 Handpieces specially for suction-irrigation A61M1/774, aspiration tips A61M1/84
• CPC Class Codes: A61M 2205/058 with ultrasound therapy
• CPC Class Codes: A61M 2205/3313 used specific wavelengths
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/3344 Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 2210/0612 Eyes

Abstract

A control arrangement for an ophthalmic surgical system for phacoemulsifying a lens wherein the system includes an aspiration line for drawing off fluid and shattered lens particles of the eye lens and a phaco handpiece having a needle. The aspiration line runs within the needle and is configured to impart ultrasonic energy to the phaco handpiece for shattering the eye lens via a longitudinal vibration of the needle. The control arrangement includes a transmitter configured to irradiate electromagnetic radiation via the aspiration line and a receiver configured to receive at least a part of the radiation; and, a control unit configured to control an absolute value of a parameter of the ophthalmic surgical system in dependence upon the amount of the received electromagnetic radiation.

Claims

1. A control arrangement for an ophthalmic surgical system for phacoemulsifying a lens, the system including:

an aspiration line for drawing off fluid and shattered lens particles of the eye lens;

a phaco handpiece having a needle;

said aspiration line running within said needle and being configured to impart ultrasonic energy to said phaco handpiece for shattering said eye lens via a longitudinal vibration of said needle; and

,

said control arrangement comprising;

a transmitter configured to irradiate electromagnetic radiation;

a coupling unit having a distal end and being configured to so conduct at least one part of said irradiated electromagnetic radiation to said distal end that said at least one part of said electromagnetic radiation can be coupled into said aspiration line;

said distal end being disposed outside of said aspiration line;

a receiver configured to receive at least a part of said electromagnetic radiation;

a control unit configured to control an absolute value of a parameter of said ophthalmic surgical system in dependence upon the amount of the received electromagnetic radiation; and

,

said electromagnetic radiation having a wavelength greater than 750 nanometers and a pulsed infrared radiation having an irradiance of a maximum of 0.1 W/cm².

2. The control arrangement of claim 1, wherein electromagnetic radiation coupled into said aspiration line emanates therefrom;

and, said receiver is configured to receive the electromagnetic radiation emanating from said aspiration line.

3. The control arrangement of claim 1, wherein said receiver receives electromagnetic radiation reflected from a lens particle.

4. The control arrangement of claim 1, wherein said aspiration line has a line inner wall for reflecting the electromagnetic radiation coupled into said aspiration line.

5. The control arrangement of claim 1, wherein said aspiration line has a line wall for forward conducting electromagnetic radiation coupled thereinto.

6. The control arrangement of claim 1, wherein said control arrangement further comprises an energy supply for supplying ultrasonic energy to said phaco handpiece;

an aspiration pump having a suction power and being operatively connected to said aspiration line;

a reflex vessel for supplying a volume flow of a fluid for venting said aspiration line; and

, said parameter of said ophthalmic surgical system being one of;

said ultrasonic energy, said suction power or said volume flow.

7. The control arrangement of claim 6, wherein said absolute value of said parameter of said ophthalmic surgical system is controllable in dependence upon the pressure in said aspiration line.

8. An ophthalmic surgical system for phacoemulsifying a lens, the system comprising:

an aspiration line for drawing off fluid and shattered lens particles of the eye lens;

a phaco handpiece having a needle;

said aspiration line running within said needle and being configured to impart ultrasonic energy to said phaco handpiece for shattering said eye lens via a longitudinal vibration of said needle; and

,

a control arrangement including;

a transmitter configured to irradiate electromagnetic radiation;

a coupling unit having a distal end and being configured to so conduct at least one part of said irradiated electromagnetic radiation to said distal end that said at least one part of said electromagnetic radiation can be coupled into said aspiration line;

said distal end being disposed outside of said aspiration line;

a receiver configured to receive at least a part of said electromagnetic radiation;

a control unit configured to control an absolute value of a parameter of said ophthalmic surgical system in dependence upon the amount of the received electromagnetic radiation;

said electromagnetic radiation having a wavelength greater than 750 nanometers and a pulsed infrared radiation having an irradiance of a maximum of 0.1 W/cm²; and

,

a system component assembly including at least one of the following;

an energy supply for supplying energy to said phaco handpiece, an aspiration pump operatively connected to said aspiration line and a reflux vessel for holding fluid for venting said aspiration line.