| 摘要 |
The invention relates to a medical auxiliary instrument for introduction into the body of a patient, to the use of such an auxiliary instrument, to a positioning system for percutaneous interventions, and to a method for determining a reference position for such a positioning system. To permit a particularly safe minimally invasive percutaneous intervention, especially in the area of the spinal column, a medical auxiliary instrument (10) for introduction into the body of a patient is proposed, with a tube (11), and with a trocar element (12) arranged in the tube (11), wherein the trocar element (12) has at least one marking element (16) which is designed to determine its position with the aid of a contactless locating method, and wherein the tube (11), at its one end (18), has a securing device (19) for forming a releasable mechanical connection to a tissue part (3) of the patient in such a way that, when the connection to the tissue part is established, the position of the marking element (16) serves as reference marker for a positioning system (100) for percutaneous interventions. |
