A device to extract elements contained in a cavity, additional to patent ofinvention P060105329, and of preferable application to assistance atchildbirthand/or extraction of elements seated in cavities of the human body,facilitatingthe task of medical professionals. Said device is comprised of a bag havingoneof its ends open, through which it is possible to introduce the element to beextracted, in which, in a first embodiment and on the outer surface of the bagand along all its circumference line, there is at least one air chamber beingableto get in contact with the element to be extracted when receiving innerpressure,being said chamber connected to a pressure generating means； and in asecond embodiment, an outward fold is defined on said bag, forming an annularcavity at the time it gets in contact with the cavity containing the elementto beextracted.
