HEMODYNAMIC STABILITY DETERMINATION (HSD) - Eliminates all possible blood pressure measurement error caused by mental and physical stress and avoids unnecessary multiple measurement to attain an average of your blood pressure. The lack of rest condition, which is detected by the HSD technique, is the most common error in the blood pressure diagnosis. The blood pressure results have to be obtained in sufficient rest condition in order to have an accurate medical judgement of a patient‘s blood pressure status. (Rest Condition)