Device for Biological Cell Collection and Method of Use

A device for collecting a biological sample in a subject, the device comprising:

• a tubular member through which fluid can be directed;
• a collection mechanism having:
• a proximal portion attached to a distal end of the tubular member;
• a distal inflatable portion designed to expand distally from within the proximal portion when inflated with the fluid and to retract within the proximal portion;
• and
• a stiffening sleeve connected to, and inserted axially into, the proximal portion, the stiffening sleeve being design to prevent collapse of the proximal portion during vacuum retraction of the distal inflatable portion into the proximal portion.