Techniques for operating generator for digitally generating electrical signal waveforms and surgical instruments
Disclosed is a method of generating electrical signal waveforms by a generator. The generator includes a processor and a memory in communication with the processor. The memory defines a first and second table. The processor retrieves information from the first table defined in the memory, where the information is associated with a first wave shape of a first electrical signal waveform for performing a surgical procedure. The processor retrieves information from the second table defined in the memory, where the information is associated with a second wave shape of a second electrical signal waveform for performing a surgical procedure. The processor combines the first and second wave shapes to create a combined wave shape of an electrical signal waveform for performing a surgical procedure and the combined wave shape electrical signal waveform for performing a surgical procedure is delivered to a surgical instrument.
1. A method of generating electrical signal waveforms by a generator, the generator comprising a processor and a memory in communication with the processor, the memory defining a first and second table, the method comprising:
retrieving, by the processor, stored phase points defining a first digital electrical signal wave shape of a first electrical signal waveform from the first table defined in the memory;
retrieving, by the processor, stored phase points defining a second digital electrical signal wave shape of a second electrical signal waveform from the second table defined in the memory;
combining, by the processor, the phase points of the first digital electrical signal wave shape and the phase points of the second digital electrical signal wave shape to create a combined wave shape of an electrical signal waveform for performing a surgical procedure; and
delivering the combined wave shape electrical signal waveform for performing the surgical procedure to a surgical instrument.
2. The method of claim 1 , wherein the memory is a first memory, the first table is defined by the first memory, and the second table is defined by a second memory.
3. The method of claim 1 , wherein the first digital electrical signal wave shape is associated with a radio frequency (RF) electrical signal waveform and the second digital electrical signal wave shape is associated with an ultrasonic electrical signal waveform.
4. The method of claim 1 , wherein the first digital electrical signal wave shape is associated with a first ultrasonic electrical signal waveform and the second digital electrical signal wave shape is associated with a second ultrasonic electrical signal waveform.
5. The method of claim 1 , comprising creating the first and second table by a direct digital synthesis circuit coupled to the processor.
6. The method of claim 5 , comprising:
addressing, by the processor, the first table according to a frequency of the first electrical signal waveform; and
addressing, by the processor, the second table according to a frequency of the second electrical signal waveform.
7. The method of claim 5 , comprising:
storing, by the processor, information associated with the first digital electrical signal wave shape in the memory; and
storing, by the processor, information associated with the second digital electrical signal wave shape.
8. The method of claim 1 , comprising:
receiving, by the processor, a feedback signal associated with tissue parameters; and
modifying the first and second wave shapes according to the feedback signal.
9. A method of generating electrical signal waveforms by a generator, the generator comprising a processor and a memory in communication with the processor, the memory defining a first and second table, the method comprising:
retrieving, by the processor, information from the first table defined in the memory, wherein the information from the first table is associated with a first wave shape of a first electrical signal waveform for performing a surgical procedure;
retrieving, by the processor, information from the second table defined in the memory, wherein the information from the second table is associated with a second wave shape of a second electrical signal waveform for performing a surgical procedure;
delivering the first and second electrical signal waveforms for performing a surgical procedure to a surgical instrument; wherein delivering the first and second electrical signal waveforms comprises at least one of: switching between the first and second electrical signal waveforms and synchronizing the first and second electrical signal waveforms;
receiving a feedback signal associated with tissue parameters; and
based on the received feedback signal, and while delivering the first and second electrical signal waveforms, determining whether to:
switch from a first phase point of the first electrical signal waveform to a second phase point of the second electrical signal waveform and convert the second phase point to a first analog signal; or to
synchronize delivery of the first and the second phase points and convert the synchronized phase points to a second analog signal.
10. The method of claim 9 , comprising:
maximizing power delivered to the surgical instrument.
11. The method of claim 9 , wherein the first electrical signal waveform represents a RF waveform and the second electrical signal waveform represents an ultrasonic signal waveform.
12. The method of claim 9 , wherein the first wave shape is associated with a first ultrasonic electrical signal waveform and the second wave shape is associated with a second ultrasonic electrical signal waveform.
13. A method of generating electrical signal waveforms by a generator, the generator comprising a processor and a memory in communication with the processor, the memory defining a first and second table, the method comprising:
retrieving, by the processor, information from the first table defined in the memory, wherein the information from the first table is associated with a first wave shape of a first electrical signal waveform for performing a surgical procedure;
retrieving, by the processor, information from the second table defined in the memory, wherein the information from the second table is associated with a second wave shape of a second electrical signal waveform for performing a surgical procedure; and
combining, by the processor, the first and second wave shapes to create a combined wave shape of an electrical signal waveform for performing a surgical procedure;
delivering the combined wave shape electrical signal waveform for performing the surgical procedure to a surgical instrument; and
modifying, by the processor, the combined wave shape of the electrical signal waveform to form a modified electrical signal waveform, the modified electrical signal waveform comprising a peak amplitude that does not exceed a predetermined amplitude and is less than a peak amplitude of the combined wave shape.
14. The method of claim 13 , wherein the first wave shape is associated with a first radio frequency (RF) electrical signal waveform and the second wave shape is associated with a second RF electrical signal waveform.
15. The method of claim 13 , wherein the first wave shape is associated with a first ultrasonic electrical signal waveform and the second wave shape is associated with a second ultrasonic electrical signal waveform.
16. The method of claim 13 , wherein the first wave shape is associated with a RF electrical signal waveform and the second wave shape is associated with an ultrasonic electrical signal waveform.
17. The method of claim 13 , comprising determining, by the processor, the peak amplitude of the combined electrical signal waveform while delivering the combined electrical signal waveform to the surgical instrument.
18. The method of claim 13 , comprising reducing an amplitude of the combined electrical signal waveform prior to an occurrence of the peak amplitude of the combined electrical signal waveform.
19. The method of claim 13 , comprising determining the peak amplitude of the combined electrical signal waveform and modifying the combined electrical signal waveform based on the determined peak amplitude of the combined electrical signal waveform.
20. The method of claim 1 , wherein the delivered combined wave shape electrical signal is delivered through a single output port of the generator.