The document discusses electrosurgical units, which utilize high-frequency electric currents for cutting, coagulating, and desiccating biological tissue during surgical procedures. It outlines various techniques, device modes, safety precautions, and advantages over traditional methods. Key points include the importance of grounding the equipment, using protective gear, and the effectiveness of different electrode types.

1. Electrosurgical Unit
Presented By:
Prasad vagal
Shraddha Khatavkar

2. Electrosurgical unit

5. Principle
 Electro surgery is the application of a
high-frequency electric current to
biological tissue as a means to cut,
coagulate, desiccate, or fulgurate
tissue.
 Electrosurgical devices are frequently
used during surgical operations
helping to prevent blood loss in
hospital operating rooms or in out
patient procedures.

6. Principle of surgical diathermy

7. Types of electrosurgical
technique
1. Electro-surgical coagulation
2. Fulguration
3. Desiccation
4. Electrotomy

9. Waveforms

11. Block Diagram of ESU

12. Types of ESU
• Monopolar technique
• Bipolar technique

13. Mono-Polar Technique
(flow of current)
• Active Electrode tip
• Patient
• Neural Electrode
• Generator

14. Mono-polar Technique

15. Bipolar Technique

16. Types of electrodes for cutting
• Needle electrode
• Angulated lancet electrode
• Angulated band loop electrode
• Wire loop electrode
• Straight lancet electrode

18. MODES
 The device has several modes:
• Cut mode—Pure sine wave,
for cutting with the least
coagulation.
• Coag mode—Pulsed sine
wave, low-duty cycle, for
coagulating bleeding tissue.
• Blend 1 mode—Modulated
sine wave, for coagulating as
the tissue is cut.
• Blend 2 mode—Modulated
sine wave, for coagulating as
the tissue is cut.

21. Safety aspects in electro
surgical unit
i. Burns
ii. High frequency current
iii. Explosion hazards

23. Staff safety
 Avoid contact with the neutral electrode
 When applying current, always be sure to wear
gloves and touch the equipment or patient body
with the entire palm of the hand, not with a
single finger.
 Electrosurgical equipment needs to be grounded
in order to minimize interference with video
endoscopic systems.
 Smoke generated during electrosurgical
procedures can be irritating and potentially
harmful to personnel; surgical masks and
adequate ventilation of smoke may be useful

24. Advantages over other
techniques
• The laser is less efficient, less powerful,
more costly, more bulky in the operating
room and less understood due to a smaller
case history data base work to discourage
its use in many cases.
 So much depends upon the skill of the
surgeon in the use of any surgical knife, that
the selection is often a professional
judgment.

25. Thank you !!!

26. Bibliography
a. Iambiomed
b. R S Khandpur
c. Wikipedia