Surgery – Instruments – Stereotaxic device
Patent
1998-08-19
2000-04-04
Buiz, Michael
Surgery
Instruments
Stereotaxic device
A61B 604
Patent
active
060455586
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The previously known whole body stereotaxis apparatus has a base plate and two curved marginal or side strips which border thereon and are attached thereto at the marginal or side edges thereof. The two side strips are connected by hoops or arches extending over the base plate. This whole body stereotaxis apparatus is disadvantageous, since it is lacking the possibility of accurately localizing points in the area of the base plate center. By this, a patient's body resting upon the base plate can also be localized only inaccurately in the area bordering on the base plate. Furthermore, the rod-like calibration rods of said publication are awkward and only permit a calibration of the arch to which they are fixed. In addition, the arrangement of this publication is lacking means for target-positioning the entire apparatus for a subsequent irradiation of the patient. Finally, two adjacent arches are not defined accurately with respect to each other as regards their relative positioning.
It is the object of the present invention to provide a whole body stereotaxis apparatus which avoids the drawbacks of said prior art and particularly permits an accurate localization also in the area of the base plate and areas bordering thereon. In this connection, calibration means which can easily be manipulated shall be provided, and the relative positioning of adjacent arches shall be facilitated.
According to one aspect of the present invention a whole body stereotaxis apparatus according to the preamble of claim 1 shall be provided, which is characterized in that a central strip having bores for receiving accessories is secured to the base plate. The central strip can accommodate particular calibration means which thus also permit a calibration in the area of the base plate.
According to a further aspect of the present invention, a whole body stereotaxis apparatus is provided which is characterized in that two opposite arches are fixed to the side strips, and the arches are connected by at least one holding bar which serves for holding surgical instruments. The holding bar defines a clear distance between the two adjacent arches so as to facilitate the localization of surgical instruments mounted on the holding bar. The distance between the two arches does not change even while the surgical instruments fixed to the holding bar are actuated.
According to a third aspect of the present invention a whole body stereotaxis apparatus according to claim 3 is provided, which is characterized in that at least one arch is fixed to the side strip and the arch carries target setting means for the subsequent irradiation of the patient. The target setting means enable accurate positioning of the entire whole body stereotaxis apparatus with respect to an irradiation system.
The base plate preferably contains carbon fibers. They contribute considerably to the stability of the base plate.
The base plate preferably contains acrylic foam. It increases the flexibility of the carbon fibers.
In an especially preferred embodiment, the base plate alternately comprises a layer of acrylic foam and a layer of plastics fibers sandwiched together. By this it is possible to achieve especially satisfactory results as regards lightness or low weight, manipulability and flexibility of the base plate.
It is preferred to secure calibration means to one arch or to the central strip, which supplies a defined reference point in computer tomography. The calibration means preferably has a localization plate triangular in cross-section and accommodating metal wires. The metal wires supply a reference point or a reference line in computer tomography by means of which the stereotaxis apparatus can be calibrated.
It is preferred to equip the base plate with immobilizing means for the patient, particularly a vacuum mattress. It serves for the clear and position-stable fixation or immobilization of the patient with respect to the stereotaxis apparatus. The vacuum mattress is wrapped around the patient and then eva
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patent: 5665095 (1997-09-01), Jacobson
patent: 5681326 (1997-10-01), Lax
Pastyr Otto
Schlegel Wolfgang
Barrett William A.
Buiz Michael
Deutsches Krebsforschungszentrum Stiftung des Offentlichen Recht
Green, III Edward H.
Hultquist Steven J.
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