Sensing the patient position and contact utilizing the mono-polar return pad electrode to provide situational awareness to the hub

1. A surgical system comprising:

a monopolar return pad; and

a surgical hub communicatively coupled to the monopolar return pad, the surgical hub comprising a control circuit configured to determine a presence and a position of a patient on the monopolar return pad according to data received from the monopolar return pad.

2. The surgical system of claim 1 , wherein the control circuit is configured to control a visualization means according to at least one of the determined presence or the determined position of the patient on the monopolar return pad, or a combination thereof.

3. The surgical system of claim 1 , wherein the control circuit is further configured to:

control an electrosurgical generator to provide a varying range of electrosurgical frequencies to the patient; and

monitor a response to the varying range of electrosurgical frequencies by the monopolar return pad to determine the position of the patient.

4. The surgical system of claim 1 , wherein the control circuit is further configured to:

determine a maximum power of a generator according to capacitive coupling variations of the monopolar return pad; and

adjust a power of the generator based on the determination.

5. The surgical system of claim 1 , wherein the control circuit is further configured to monitor radiative resistance of the monopolar return pad to determine at least one of the presence or the position of the patient on the monopolar return pad.

6. The surgical system of claim 5 , wherein the control circuit is further configured to utilize situational awareness in combination with the monitored radiative resistance of the monopolar return pad to determine the at least one of the presence or the position of the patient, by comparing the monitored radiative resistance to previous radiative resistance data obtained in similarly situated events of other patients on similarly situated monopolar return pads.

7. The surgical system of claim 1 , wherein the control circuit is further configured to monitor parasitic loading of the monopolar return pad to determine at least one of the presence or the position of the patient on the monopolar return pad.

8. The surgical system of claim 7 , wherein the control circuit is further configured to utilize situational awareness in combination with the monitored parasitic loading of the monopolar return pad to determine the at least one of the presence or the position of the patient, by comparing the monitored parasitic loading to previous parasitic loading data obtained in similarly situated events of other patients on similarly situated monopolar return pads.

9. The surgical system of claim 1 , further comprising a monopolar surgical device configured to stimulate a nerve using RF energy at a surgical site of the patient, wherein the control circuit is further configured to monitor patient movement based on the nerve stimulation to determine at least one of the presence or the position of the patient on the monopolar return pad.

10. A surgical system comprising:

a monopolar return pad;

a surgical hub communicatively coupled to the monopolar return pad; and

a monopolar surgical instrument communicatively coupled to the surgical hub and configured to supply energy to a patient on the monopolar return pad;

the surgical hub comprising a compensation circuit configured to adjust power to the monopolar surgical instrument to maintain a peak applied power at the monopolar surgical instrument while the patient is on the monopolar return pad.

11. The surgical system of claim 10 , wherein the compensation circuit comprises a plurality of binary compensation relays.

12. The surgical system of claim 11 , wherein adjusting power to the monopolar surgical instrument comprises:

measuring a power level of the monopolar surgical instrument;

incrementing the power supplied to the monopolar surgical instrument using the plurality of binary compensation relays by one power unit;

measuring the power level of the monopolar surgical instrument after the power is incremented; and

comparing the power level before the power was incremented to the power level after the power was incremented.

13. The surgical system of claim 12 , wherein adjusting power to the monopolar surgical instrument further comprises:

determining that the power level before the power was incremented is higher than the power level after the power was incremented; and

maintaining the power level based on the determination.

14. The surgical system of claim 10 , wherein the surgical hub is further configured to:

determine a presence and a position of a patient on the monopolar return pad according to data received from the monopolar return pad; and

automatically halt power supplied to the monopolar surgical instrument after determining at least one of:

the patient is out of position, or

the patient is off the monopolar return pad.

15. The surgical system of claim 14 , wherein the surgical hub is further configured to utilize situational awareness to determine at least one of:

the patient is out of position, or

the patient is off the monopolar return pad.