When performing a laparoscopic appendectomy using a Hasson cannula, what is true?

When performing a laparoscopic appendectomy with a Hasson cannula, it is indeed true that the Verres needle is not required. The Hasson technique is a method of creating a direct entry into the abdominal cavity that involves making a small incision in the abdominal wall through which the Hasson cannula is then inserted. This approach allows for the introduction of laparoscopic instruments without necessitating the use of a Verres needle, which is typically employed for establishing pneumoperitoneum via a closed technique.

The other options presented do not align with the procedure using a Hasson cannula. The Hasson cannula does not need to be replaced for the procedure if it is functioning correctly; it serves as the entry point for instruments during laparoscopic surgery. While the procedure does involve an incision, it does not require an open incision beyond the small incision made for the cannula itself. Finally, while CO2 gas is most commonly used to maintain pneumoperitoneum during laparoscopic surgeries, it is not mandatory when using the Hasson technique, as the focus is on direct access rather than establishing insufflation via the Verres needle. Each of these factors highlights the unique attributes of the Hasson cannula approach during a laparoscopic appendectomy.