The Brown-Roberts-Wells arc system is a non-target-centered design, i.e., without an independent approach angle. The approach angle of this system strictly depends on precalculated values (entry and target point). Therefore, some components of the system used sometimes prevent a direct insight into the operation field. Once the entry point has been set, the arc system normally has to be taken off to permit an unimpeded approach to the burr hole. To facilitate rotation and return to the primary β and γ angular settings during stereotactic craniotomy and other surgery, a pair of clamps was designed for the BRW arc system. These clamps help the approach to the entry point in such a way that some components of the arc (e.g., the guide block holder) are removed from the surgical field, thus giving wide visual access for the stereotactic approach. Consequently, it is no longer necessary to remove the entire arc system, resulting in an increased operation safety and shorter operation times.
Key words:
Stereotaxy - BRW System - Instrumentation - Clamps
References
1
Heilbrun M P, Roberts T, Apuzzo M LJ, Wells T H, Sabshin J K.
Preliminary experience with Brown-Roberts-Wells (BRW) computerized tomography stereotaxic guidance system.
J Neurosurg.
1983;
59
217-222
2 Kandel E. Principles of stereotactic operations on subcortical structures. In: Kandel EI (ed). Functional and stereotactic neurosurgery New York, London: Medical Book Company 1989: 118
3 Pell M F. Technique of CT-Directed Stereotactic Biopsy. In: Pell MF, Thomas DGT (ed). Handbook of Stereotaxy Using the CRW Apparatus Baltimore: Williams & Williams Company 1994: 53-72
4 Tasker R R. Stereotactic Surgery. Principles and Techniques. In: Wilkins RH, Rengachary SS (ed). Neurosurgery (2th Ed) New York: McGaw-Hill Company 1996: 4069-4089
5
Birbilis T, Bockermann V, Markakis E.
Determination of the burr hole site using the BRW-stereotactic system. A simple marking technique.
Minim Invas Neurosurg.
1997;
40
27-29
6 Coffey R J, Lunsford L D. Localisation and biopsy of intracranial lesions with computed tomography and magnetic resonance imaging. In: Schmidek HH, Sweet WH (ed). Operative neurosurgical techniques Philadelphia, London, Toronto: W. B. Saunders Company, Volume I 1988: 463-473
7 Heilbrun M P, Roberts T S, Wells T H. et al .Technical Manual: Brown-Roberts-Wells (BRW) CT Stereotactic Guidance System. Burlington, MA: Radionics, Inc 1982
8
Moore R M, Black P M, Ellenbogen R, Gall C M, Eldredge E.
Stereotactic craniotomy: Methods and results using the Brown-Roberts-Wells stereotactic frame.
Neurosurgery.
1989;
25
572-577
10 McL Black P. Commentary: Stereotactic techniques using the Brown-Roberts-Wells stereotactic frame. In: Schmidek HH, Sweet WH (ed). Operative neurosurgical techniques Philadelphia, London, Toronto: W. B. Saunders Company, Volume I 1988: 475-480
