Manual vacuum aspirator (MVA)
A 60-mL plastic syringe that acts as a manual vacuum reservoir, connected to a thin, flexible cannula (Karman cannula) of various calibers that is inserted into the uterine cavity.
How it is used
It empties the contents of the uterine cavity in cases of incomplete miscarriage, first-trimester spontaneous pregnancy loss, or early induced abortion, without requiring general anesthesia or electrical power.
Clinical tip
Confirm that the syringe is holding its vacuum (plunger not sliding back) before inserting the cannula into the uterus, since loss of negative pressure is the most common cause of an incomplete aspiration.
Sources
This entry is part of the Instriq catalog, researched and written per specialty from real web research -- never generated or invented without verification -- and reviewed skeptically and independently before publication. How this catalog is written.
History
Added to the catalog on 2026-10-02.
Dates derived from the project's public version-control history on GitHub, not a live collaborative edit log.