Uterine aspirators are required to have an adjustable vacuum with at least a 400 mm Hg maximum vacuum level and a flow rate higher than 30 L/min at maximum vacuum, as well as some type of vacuum-level regulator.
The unit should have collection canisters that hold at least 1.5 L of liquid with overflow protection or any other anti-contamination method.
It is essential that units be resistant to fluid spills because they are used in potentially wet environments.
Turning the aspirator on should be simple and intuitive as well as adjusting and operating it. It should also be easy to empty and exchange reusable canisters without significant risk of instrument or operator contamination.
Disposable canisters should be discarded in a simple and easy method with minimal risk of spills or contamination.
Most units with disposable containers can accept alternative manufacturers' containers. These standard containers may be more convenient to order and offer the user a choice of suppliers.
Some of the installed filters supplied with the canisters may severely limit airflow rates.
Higher suction rates are available in some units, so that they may be used to perform general-purpose suction; some are being used for liposuction procedures.

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