What solution is contraindicated on the sterile field during an endoscopic case involving electrosurgical instruments?

During an endoscopic case involving electrosurgical instruments, the presence of electrolytes or a conductive solution on the sterile field can lead to complications or adverse effects. Normal saline is a saline solution, meaning it contains sodium chloride dissolved in water, and is therefore conductive. If normal saline comes into contact with electrosurgical instruments, it can create a pathway for electrical current, which may increase the risk of thermal injury to tissues or interfere with the intended operation of the electrosurgical device.

In contrast, sterile water is non-conductive and would not pose this risk, while antiseptics like chlorhexidine and betadine have their uses in surgical settings but should be used appropriately and with caution as well. The unique properties of normal saline regarding conductivity make it unsuitable in situations where electrosurgical instruments are used, reinforcing the importance of understanding the characteristics of solutions handled on the sterile field.