What type of sterilization should be employed to re-sterilize a Poole suction tip during an open laparotomy?

The preferred method of sterilization for re-sterilizing a Poole suction tip during an open laparotomy is pre-vacuum sterilization, commonly known as pre-vac. This technique effectively removes air from the sterilization chamber before steam is introduced, creating a vacuum that allows the steam to penetrate the instruments more thoroughly. This is particularly important for hollow instruments, such as suction tips, as it helps ensure that steam reaches all surfaces, including the internal channels.

Pre-vacuum sterilization operates at higher temperatures and pressures compared to gravity displacement sterilization, which can lead to slower steam penetration and may not effectively sterilize complex or hollow instruments like the Poole suction tip. Ethylene oxide is a chemical sterilization method that, while useful for heat- or moisture-sensitive items, is not typically used during open surgical procedures due to the necessity of achieving immediate sterility. Cobalt 60 radiation is a method generally used for sterilizing bulk items and is not applicable in immediate surgical settings.

In summary, the pre-vac method is the most effective choice for ensuring comprehensive sterilization of hollow surgical instruments during surgical procedures.