PASQUALINI  SYSTEM SEAT

ERGONOMICS, WELLBEING AND COMFORT

People use a chair or a support to sit or better to rest their, pelvises on them. The sitting posture are: 1)upright, 2)inclined forward 3)inclined backwards. In a natural, orthostatic position, with the backbone and the trunk perpendicular, the perineum is not compressed. But also in the natural position the perineum can be compressed because of the seat stuffing. In fact, when we sit on a sofa, the ischiatic bones, which are stiff, sink in a soft material, favouring the contact of the seat with the delicate space of the pelvis between the ischiatic bones. As the trunk rotation forward or backwards takes place on the ischia, the compression on the user’s delicate parts is caused by the approach of the pubic and coccygeal bones to the resting seat. It would be better to sit on a level hard seat but also this type of sitting causes the two ischia to ache. So when we are sitting on chairs with horizontal planes or on slightly hollow planes following the anatomical lines of the human body we feel a compression on the median low part of the pelvis varying according to the thickness of stuffing, its material and the inclination of the pelvis. According to the compression intensity as time goes by the blood microcirculation in these areas can be damaged. In fact the pudenda arteries are between the ischia, just in the perineal area where the seat compresses and eventually may cause more or less serious stenosis. To move the perineal area away from the seat centre in order not to compress the genitals and the coccyx, a new system of support has been patented. The seat consists of two planes supporting the user rise progressively from the centre of the chair forms a free wholesome triangle. In fact the space between the two ischia is almost coustant or varies little between man and woman. The ischia rest on two planes inclined of several degrees as regards the horizontal plane. As the central concave angle diminuishes, the supporting inclined planes increase the angle with the horizontal plane and consequently the distance of the two ischia and the perineum from the centre of support. According to this concept the user can lift and move away his or her delicate parts from the seat as much as he or she likes. For certain pathologies only one of the two inclined supporting planes can be lifted. As the part of the seat under the two ischia has no support function, it can be interrupted to favour the air passage and made the parts of the man compressed pelvis visible. The two inclined (stify) supportino planes cannot sink or flatten under the user’s weight but they maintain the chosen concave angle and can be upholstered with any material to bare and better distribuite the body weight also on the thighs. With this new sitting system the user’s coccyx and genitals are not compressed either sitting upright or inclined forward or backwards. This innovation can be applied to any type of seat, favours an ergonomic posture and does not require any adaptation to use it. In fact the user immediately feels a sensation of wellbeing and confort

SEAT ADVANTAGES

This sitting posture, both as prevention and as a therapy, can be regulated in function of the use of the seat

A) THE CONCAVE SHAPE of the supporting planes is designed:

    1) to eliminate the compression in the perineal area and to the sex organs

    2) not to compress the coccygeal zone of the back bone

    3) for an anatomical and ergonomic posture

    4) to ventilate the low pelvis

B) THE CONCAVE SHAPE of the back is designed:

    1) for an orthostatic posture of the back bone

    2) to avoid side shifts of trunk and the pelvis

    3) to reduce the skeleton muscular work on the sagittal level both frontal and transversal

    4) not to compress the backbone

C) ONE OR BOTH the concave shapes give:

    1) a new look to all new seats, including the common chair.