Handheld medical devices including microwave amplifier unit at device handle

1. A method of directing energy to tissue, comprising the steps of:

providing a handheld device including an energy applicator, a handle assembly configured to support the energy applicator at a distal end thereof, and a microwave amplifier unit disposed within the handle assembly, the energy applicator and microwave amplifier being selectively removable from the handle assembly; and

transmitting energy from an output of the microwave amplifier unit through the energy applicator to tissue.

2. The method of directing energy to tissue of claim 1 , further comprising the step of receiving a high-frequency input signal at an input of the microwave amplifier unit, before the transmitting step.

3. The method of directing energy to tissue of claim 2 , further comprising the step of amplifying the high-frequency input signal to generate a high-frequency output signal at the output of the microwave amplifier unit, after the receiving step.

4. The method of directing energy to tissue of claim 1 , wherein the handheld device further includes a signal generator capable of generating a high-frequency signal to be transmitted to an input of the microwave amplifier unit.

5. The method of directing energy to tissue of claim 4 , further comprising the step of selectively enabling the microwave amplifier unit to receive signals from the signal generator.

6. The method of directing energy to tissue of claim 5 , further comprising the step of selectively enabling the microwave amplifier unit to receive signals from a remote signal generator.

7. A method of directing energy to tissue, comprising the steps of:

providing a handheld device including a microwave-signal-amplifying module disposed within a handle assembly of the device and a probe including an antenna assembly operably coupled to the microwave-signal-amplifying module, the microwave-signal-amplifying module including a microwave amplifier unit adapted to amplify a high-frequency input signal to generate a high-frequency output signal, the probe and microwave-signal-amplifying module being selectively removable from the handle assembly;

receiving a high-frequency signal at an input of the microwave amplifier unit; and

transmitting energy from an output of the microwave-signal-amplifying module through the antenna assembly to tissue.

8. The method of directing energy to tissue of claim 7 , wherein the microwave-signal-amplifying module further includes a signal generator capable of generating the high-frequency signal to be transmitted to the input of the microwave amplifier unit.

9. The method of directing energy to tissue of claim 8 , further comprising the step of selectively enabling the microwave amplifier unit to receive signals from the signal generator.

10. The method of directing energy to tissue of claim 9 , further comprising the step of selectively enabling the microwave amplifier unit to receive signals from a remote signal generator.

11. The method of directing energy to tissue of claim 7 , further comprising the step of determining at least one operating parameter associated with the microwave-signal-amplifying based on at least one signal indicative of a user-input.

12. The method of directing energy to tissue of claim 11 , wherein the at least one operating parameter associated with the electrosurgical power generating source is selected from the group consisting of temperature, impedance, power, current, voltage, mode of operation, and duration of application of electromagnetic energy.

13. The method of directing energy to tissue of claim 7 , wherein the handheld device further includes a sensor configured to generate a signal indicative of a parameter related to transmitting energy to tissue.

14. The method of directing energy to tissue of claim 13 , further comprising the step of determining at least one operating parameter associated with the microwave-signal-amplifying module based on the signal indicative of the parameter related to directing energy to tissue.

15. The method of directing energy to tissue of claim 7 , further comprising the step of removing at least one of the probe and the microwave-signal-amplifying module from the handle assembly, after the transmitting step.