Stereotactic neurosurgery is a field of neurosurgery in which a probe is advanced through a burr hole to a target of interest by means of a mechanical device attached to the skull with aiming based on pre-operative images. The probe may be a biopsy needle or an implantable device, but it is geometrically rigid, so that its tip can be brought to a target of interest specified on a pre-operative image, by means of a geometrical calculation. For the past decade, the field has been advancing from the imposition of large, classical metal frames, which encompass the entire head of a patient, to the attachment of small platforms placed only over an entry site to reduce patient discomfort, facilitate surgical access, allow multiple targeting during one surgery via multiple platforms, and reduce procedure time, while maintaining the same level of accuracy.
Classical metal frames are designed for approaching one target at a time with an unrestricted entry point towards the deep target by employing the principle that the target is at the center of a sphere. Because of the long trajectories, both accuracy and patient comfort are challenged by the demands of surgeries for deep brain stimulation (DBS) in which the patients are awake throughout the lengthy surgery procedure (about 5-8 hours).
The present invention, in one aspect, relates to a surgical platform. In one embodiment, the surgical platform includes a ring structure having a first end portion, and an opposite, second end portion, and a body portion therebetween, where the body portion defines a housing extending between the first and second end portions. The surgical platform also includes a ball joint that is configured to be received in the housing of the ring structure and be rotatable around its center, where the ball joint defines at least one bore for accommodating a probe therethrough. The surgical platform further includes a plurality of leg assemblies. Each leg assembly comprises a first leg member having a joint portion detachably connected to the ring structure, an exteriorly threaded shank portion extending away from the joint portion, and an axis through the joint portion and the exteriorly threaded shank portion; a second leg member having a joint portion, an exteriorly threaded shank portion extending away from the joint portion, and an axis through the joint portion and the exteriorly threaded shank portion; and a sleeve member having a first end portion and an opposite, second end portion defining a sleeve body therebetween, and an axis through the sleeve body, where the sleeve body defines a chamber interiorly threaded for engaging with the first and second leg members, respectively.