Surgical device with light

1. An electrocautery unit for connecting to a handle of an electrocautery device, the electrocautery unit comprising:

a body having a proximal end and a distal end, and a body axis extending along the center of the body between said proximal end and said distal end, wherein said proximal end comprises a connecting element constructed and arranged to connect to a handle of an electrocautery device, and said distal end comprises an arm extending distally from outside the body axis;

a light element disposed at said distal end, constructed and arranged to emit a light having a light central axis coaxial with said body axis; and

an electrode, wherein said electrode is connected to said arm, said electrode having an electrode tip which terminates at said light central axis.

2. The electrocautery unit of claim 1 , wherein said electrode includes an electrode proximal end, and said arm includes a corresponding coupling element configured to non-permanently receive the electrode proximal end of said electrode.

3. The electrocautery unit of claim 1 , wherein said connecting element constructed and arranged to detachably connect to said handle.

4. The electrocautery unit of claim 1 , further comprising a camera at said distal end.

5. The electrocautery unit of claim 4 , further comprising a transmitter to wirelessly transmit one or more images captured by said camera to a device.

6. The electrocautery unit of claim 5 , wherein said transmitter is configured to transmits a live feed of one or more images being captured by said camera.

7. An electrocautery unit for connecting to a handle of an electrocautery device, the electrocautery unit comprising:

a light element constructed and arranged to emit a light having a light central axis;

a connecting element constructed and arranged to connect to a handle of an electrocautery device;

a shaft between said light element and said connecting element, said shaft being coaxial with said light element; and

an electrode, wherein said electrode extends distally from said body from outside the light central axis toward the light central axis, said electrode having an electrode tip which terminates at said light central axis.

8. The electrocautery unit of claim 7 , wherein said light element comprises one or more light-emitting diodes.

9. The electrocautery unit of claim 7 , further comprising a handle, wherein said electrocautery unit is permanently fixed to said handle.

10. The electrocautery unit of claim 7 , wherein said connecting element constructed and arranged to detachably connect to said handle.

11. The electrocautery unit of claim 7 , further comprising a light power source for powering said light element, said light power source being independent of and different from an electrode power source for powering said electrode.

12. The electrocautery unit of claim 7 , wherein said electrode comprises a blade for cutting subcutaneous tissue.

13. The electrocautery unit of claim 7 , wherein said electrode comprises a probe.

14. The electrocautery unit of claim 7 , wherein said electrode is constructed to cauterize subcutaneous tissue.

15. The electrocautery unit of claim 7 , further comprising a battery; wherein the battery is positioned proximate the light element.

16. An electrocautery unit for connecting to a handle of an electrocautery device, the electrocautery unit comprising:

a body having a proximal end and a distal end, wherein said proximal end comprises a connecting element constructed and arranged to connect to a handle of an electrocautery device;

a light element disposed at said distal end, said light element constructed and arranged to emit a light having a light central axis; and

an electrode, wherein said electrode extends distally from said body from outside the body axis toward the light central axis, said electrode having an electrode tip which terminates at said light central axis.

17. The electrocautery unit of claim 16 , wherein said connecting element is constructed and arranged to detachably connect to said handle.

18. The electrocautery unit of claim 16 , further comprising a light power source for powering said light element, said light power source being independent of and different from an electrode power source for powering said electrode.

19. The electrocautery unit of claim 16 , further comprising a camera at said distal end.

20. A retrofit electrocautery kit, said electrocautery kit comprising:

an electrocautery unit having

a body having a proximal end and a distal end, and a body axis extending between said proximal end and said distal end, wherein said proximal end comprises a connecting element constructed and arranged to detachably connect to a handle of an existing surgical instrument handle, and

a light element disposed at said distal end, constructed and arranged to emit a light having a light central axis coaxial with said body axis,

wherein said distal end comprises an arm extending distally from outside the body axis toward said light central axis, said arm having an arm tip having a second connecting element; and

an electrode having a third connecting element for engaging said second connecting element to connect said electrode to said arm at said arm tip, wherein said electrode includes an electrode tip extending toward and terminating at said light central axis when said electrode is attached to said arm.

21. The kit of claim 20 , further comprising a surgical instrument handle for connecting to said body, said handle being electrically connected to a power source for powering said electrode.

22. The kit of claim 20 , further comprising one or more batteries housed within said body, said one or more batteries being electrically connected to said light element.

23. The kit of claim 20 , further comprising a second electrode electrode said electrode is a blade, a probe, or a cutter.

24. The kit of claim 20 , further comprising a camera at said distal end of said body.