Question

which of the following describes the correct procedure to withdraw a nonhazardous fluid from a vial? inject air into the vial and withdraw the same amount of fluid from the vial. remove the required amount of fluid needed from the vial. remove a specific amount of fluid and inject the same amount of air back into the vial. inject double the amount of air in the vial and then withdraw the required fluid from the vial.

Explanation:

To withdraw fluid from a vial, the correct procedure involves equalizing pressure. Injecting air (equal to the volume of fluid to withdraw) into the vial first allows easy removal. The first option: Inject air into the vial and withdraw the same amount of fluid from the vial. This matches the standard procedure (air injection equal to fluid volume to be withdrawn to balance pressure, enabling smooth fluid withdrawal). The second option is incorrect as it skips air injection, making withdrawal hard. The third option reverses the order (withdraw then inject air, which is not standard). The fourth option (double air) is unnecessary and incorrect.

Answer:

The correct option is: Inject air into the vial and withdraw the same amount of fluid from the vial.