Electronic controller for use with a surgical laser system

• US 4,572,189 A
• Filed: 10/11/1983
• Issued: 02/25/1986
• Est. Priority Date: 10/11/1983
• Status: Expired due to Fees

• Current Assignee: Chadwick F. Smith, Walter E. Johansen III
• Original Assignee: Chadwick F. Smith, Walter E. Johansen III
• Inventors: Smith, Chadwick F., Johansen, Walter E. III
• Primary Examiner(s): Coven, Edward M.
• Assistant Examiner(s): Hindenburg, Max F.
• Application Number:
  US06/540,299
• Time in Patent Office: 868 Days
• Field of Search: 128/4-8, 128/303.1, 128/395-398, 219/121 LA, 372/25, 372/26
• US Class Current: 606/7
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 18/245 for removing obstructions in blood vessels or calculi
• CPC Class Codes: A61B 2017/00154 pulsed
• CPC Class Codes: A61B 2017/0019 Means for setting or varying the pulse width
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2018/00636 Sensing and controlling the application of energy

Abstract

The present invention is an electronic controller for use with a laser system which includes a mechanical triggering device and which generates a beam of light energy in the infrared spectrum. The electronic controller includes a laser modulator which turns the laser system on and off at a frequency rate of two hundred cycles per second and a trigger/reset circuit which is electrically coupled to the mechanical triggering circuit. The trigger/reset circuit provides a trigger signal in its triggered state and a reset signal in its untriggered state. The electronic controller also includes a clock circuit which is electrically coupled to the triggering circuit and which provides clock signals in response to the trigger signal and a one-shot monostable, multivibrator circuit having an RC timing circuit which is electrically coupled to the clock circuit and which controls the pulse width of its output signal in a range of 0.005 seconds and 0.1 seconds in response to the clock signals. The electronic controller further includes a counter which is electrically coupled to the one-shot monostable, multivibrator circuit and which counts each of the clock signals and a comparator which is electrically coupled to the counter in order to compare the number of the counted clock signals to a selected number and to the clock circuit and which is electrically coupled to the clock circuit, so that, when the number of the counted clock signal equals said selected number, the comparator provides a clock inhibit signal in order to inhibit the clock circuit from providing any more clock signals.

Claims

1. A combination of an electronic controller and a laser system which includes a mechanical triggering device and which generates a beam of light energy in the infrared spectrum and which is electrically coupled to said electronic controller so that said electronic controller not only controls the pulse width of said beam of light energy within a range of 0.005 seconds to 0.100 seconds, but also limits the maximum number of pulses to a number which a surgeon may select for use in surgical procedures, said electronic controller comprising:

a. modulating means for turning said laser system on and off at a freqency rate of in the range of two hundred cycles per second to twenty cycles per second;

b. a triggering circuit which is electrically coupled to said mechanical triggering circuit and which provides a trigger signal in its triggered state and a reset signal in its untriggered state;

c. a clock circuit which is electrically coupled to said triggering circuit and which provides clock signals in response to said trigger signal;

d. a one-shot monostable, multivibrator circuit having an RC timing circuit which is electrically coupled to said clock circuit and which controls the pulse width of its output signal in a range of 0.005 seconds and 0.1 seconds in response to said clock signals;

e. a counter which is electrically coupled to said one-shot monostable, multivibrator circuit and which counts each of said clock signals;

f. a comparator which is electrically coupled to said counter in order to compare the number of said counted clock signals to said number which the surgeon has selected and to said clock circuit and which is electrically coupled to said clock circuit, so that, when the number of said counted clock signal equals said number, said comparator provides a clock inhibit signal in order to inhibit said clock circuit from providing any more clock signals.

2. A combination of an electronic controller and a laser system according to claim 1 where a read only memory is electrically coupled to said triggering circuit in order to electronically preprogram a plurality of surgical procedures.