what is the energy stored in the capacitor of a heart defibrillator charged to

Method and appliance for calibrating the free energy output of a defibrillator

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ane. A method of calibrating the energy output of a defibfillator having a self healing storage capacitor;

• a safety resistor connected in parallel with said cocky healing storage capacitor, and a microcontroller operatively coupled to said cocky healing storage capacitor, said method comprising the microcontroller executing steps of;

  receiving a calibration request;

  charging said cocky healing storage capacitor to a charging voltage greater than a starting voltage;

  discharging said cocky healing storage capacitor through said safety resistor;

  continuously measuring the voltage across said self healing storage capacitor every bit it discharges through said safety resistor;

  detecting, responsive to said measuring step, that the voltage across said self healing storage capacitor is less than or equal to said starting voltage;

  starting, responsive to said detecting step, a timer in said microcontroller;

  terminal, responsive to said measuring pace, that said voltage beyond said self healing storage capacitor is leis than or equal to an ending voltage;

  stopping, responsive to said concluding step, said timer in said microcontroller;

  determining an elapsed time between a starting fourth dimension of said timer in said starting footstep and an ending fourth dimension of said timer in said stopping step;

  calculating a capacitance value of said self healing storage capacitor based on the starting voltage, the ending voltage, and the elapsed time; and

  storing said capacitance value of said self healing storage capacitor in a memory connected to said microcontroller for calibrating the free energy output of said defibrillator.

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• Abstract

A defibfillator has a cocky healing storage capacitor continued in parallel with a safety resistor, and a microcontroller. Upon receipt of a calibration asking, the microcontroller charges the capacitor to a charging voltage greater than a starting voltage, and so discharges the capacitor through the safe resistor. As the capacitor is discharging, the microcontroller continuously measures the voltage across the capacitor. When the microcontroller detects that the voltage across the capacitor is less than or equal to a starting voltage, a timer in the microcontroller is started. When the microcontroller detects that the voltage across the capacitor is less than or equal to an catastrophe voltage, the timer in the microcontroller is stopped. The microcontroller then determines an elapsed time between the time the timer was started and stopped. The microcontroller then calculates a capacitance value of the capacitor based on the starting voltage, the ending voltage, and the elapsed time. This capacitance value is stored in memory, and used to calibrate the free energy output of the defibrillator past assuring that the self healing storage capacitor has been charged to a voltage level sufficient to deliver the desired amount of energy to a patient.

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• 8 Claims

• ane. A method of calibrating the free energy output of a defibfillator having a cocky healing storage capacitor;
  • a safety resistor connected in parallel with said self healing storage capacitor, and a microcontroller operatively coupled to said cocky healing storage capacitor, said method comprising the microcontroller executing steps of;receiving a scale asking; charging said self healing storage capacitor to a charging voltage greater than a starting voltage; discharging said self healing storage capacitor through said safety resistor; continuously measuring the voltage across said self healing storage capacitor as it discharges through said safety resistor; detecting, responsive to said measuring step, that the voltage across said self healing storage capacitor is less than or equal to said starting voltage; starting, responsive to said detecting stride, a timer in said microcontroller; last, responsive to said measuring footstep, that said voltage beyond said cocky healing storage capacitor is leis than or equal to an ending voltage; stopping, responsive to said concluding step, said timer in said microcontroller; determining an elapsed time between a starting time of said timer in said starting step and an ending time of said timer in said stopping stride; calculating a capacitance value of said self healing storage capacitor based on the starting voltage, the ending voltage, and the elapsed time; and storing said capacitance value of said cocky healing storage capacitor in a retentivity connected to said microcontroller for calibrating the energy output of said defibrillator.
  • View Dependent Claims (2, 3, iv)

• 5. A defibrillator having a cocky healing storage capacitor, a safety resistor connected in parallel with said self healing storage capacitor, and a microcontroller operatively coupled to said self healing storage capacitor, said microcontroller further comprising:
  • means for receiving a calibration request; means for charging said self healing storage capacitor to a charging voltage greater than a starting voltage; means for discharging said self healing storage capacitor through said safety resistor; means for continuously measuring the voltage across said self healing storage capacitor equally information technology discharges through said safety resistor; means for detecting, responsive to said measuring ways, that the voltage across said self healing storage capacitor is less than or equal to said starting voltage; means for starting, responsive to said detecting ways, a timer in said microcontroller; ways for concluding, responsive to said measuring means, that said voltage across said cocky healing storage capacitor is less than or equal to an catastrophe voltage; means for stopping, responsive to said concluding means, said timer in said microcontroller; means for determining an elapsed time between a beginning of said timer in said starting means and an ending fourth dimension of said timer in said stopping means; means for calculating a capacitance value of said self healing storage capacitor based on the starting voltage, the ending voltage, and the elapsed time; and ways for storing said capacitance value of said self healing storage capacitor in a memory connected to said microcontroller for calibrating the free energy output of said defibrillator.
  • View Dependent Claims (6, seven, 8)

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Source: https://insight.rpxcorp.com/patent/US5384544A

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