Cordless bipolar electrocautery unit with automatic power control
First Claim
Patent Images
1. An electrocautery unit, including a cautery probe having bipolar electrodes, comprising:
- a. cautery signal generator means to generate a cautery output voltage and signal at a pre-determined cautery power output such that an RF current is caused to flow between the electrodes through tissue proximate the probe;
b. power selection means to vary the pre-determined cautery power output in response to a power level selection made by a user of the unit such that the unit can be operated at multiple pre-determined cautery power output levels;
c. a power supply, including a battery, integral to the unit and which is electrically connected to the cautery signal generator means such that the unit can be operated without an external power supply cord; and
d. cautery power output feedback and control means to monitor the cautery output voltage and the RF current flowing through the tissue during operation of the unit and to adjust, in response to the magnitudes of the of output voltage and RF current, the magnitude of the cautery output signal such that the pre-determined cautery power output selected by the user is automatically maintained during operation of the unit.
6 Assignments
0 Petitions
Accused Products
Abstract
A cordless electrocautery unit for use in surgical procedures is described in which the unit is battery operated and therefore cordless. The unit is microprocessor controlled and provides for automatic feedback and control of the output power, in accordance with one of multiple power levels selected by the user.
-
Citations
9 Claims
-
1. An electrocautery unit, including a cautery probe having bipolar electrodes, comprising:
-
a. cautery signal generator means to generate a cautery output voltage and signal at a pre-determined cautery power output such that an RF current is caused to flow between the electrodes through tissue proximate the probe; b. power selection means to vary the pre-determined cautery power output in response to a power level selection made by a user of the unit such that the unit can be operated at multiple pre-determined cautery power output levels; c. a power supply, including a battery, integral to the unit and which is electrically connected to the cautery signal generator means such that the unit can be operated without an external power supply cord; and d. cautery power output feedback and control means to monitor the cautery output voltage and the RF current flowing through the tissue during operation of the unit and to adjust, in response to the magnitudes of the of output voltage and RF current, the magnitude of the cautery output signal such that the pre-determined cautery power output selected by the user is automatically maintained during operation of the unit. - View Dependent Claims (2, 3, 4)
-
-
5. An electrocautery unit for cutting and heating tissue in conjunction with a bipolar cautery probe comprising:
-
a. signal generator means to generate and supply a cautery output signal to the probe; b. automatic power output control means to control the cautery output signal such that a cautery output voltage magnitude and the magnitude of the current flowing through the tissue during use of the unit is monitored and adjusted during use to maintain a pre-determined power output level; and c. a battery integral to the unit and operatively connected to the signal generator means and to the power output control means to provide for cordless operation of the unit. - View Dependent Claims (6, 7)
-
-
8. An electrocautery unit for use with a bipolar cautery probe comprising:
-
a. a microprocessor, including a signal generator connected to a cautery drive signal output, a first A/D converter input, and a second A/D converter input; b. an output transformer having a primary winding and a secondary winding; c. a drive circuit having a drive circuit input and a drive circuit output, the drive circuit input connected to the cautery drive signal output and the drive circuit output operatively connected to the primary winding of the output transformer; d. an output current feedback circuit which provides an output current signal to the first A/D converter input of the microprocessor, the output current feedback signal corresponding to a magnitude of output current from the unit; e. an output voltage feedback circuit electrically connecting the secondary winding of the output transformer and which provides an output voltage feedback signal to the second A/D converter input of the microprocessor corresponding a magnitude of the output voltage; and f. an integral battery connected to a regulated power supply for the unit. - View Dependent Claims (9)
-
Specification