Flask for preparing a cytological suspension based on a fixing solution

A system for preparing a cytological suspension, the system comprising:

• a fixing solution;
• a cytological sample-taking brush detachably fastened to a handle, the cytological sample-taking brush configured for having collected cells;
• and
• a flask including a filter basket configured for receiving said cytological sample-taking brush with the collected cells, said filter basket being configured to be positionable within the flask so as to be at least partially immersed in the fixing solution to form the cytological suspension, and the cytological suspension can pass through the filter basket, the flask having an opening for receiving said cytological-sample taking brush, a bottom portion of the flask being provided with a valve configured for recovering the cytological suspension,
• the filter basket comprising an abutment configured for detaching the cytological sample-taking brush from the handle, whereby the cytological sample-taking brush drops into the filter basket and into the suspension whereby the collected cells pass through the filter basket and remain in the cytological suspension, said abutment being formed by a projecting portion of said filter basket.