Abstract: A surgical fiducial marker unit can include a main body, fiducial marker sites, and adhesive layer. The main body can have top and bottom surfaces, length, width, and thickness that is substantially less than the length and width. The fiducial marker sites can host surgical fiducial markers suitable for use with a separate augmented reality system and can be distributed across the main body top surface at fixed positions relative to each other to form a fixed positional arrangement that is asymmetrical. The adhesive layer can be disposed on the bottom surface of the main body and can securely adhere the main body to a patient during a surgical procedure. The surgical fiducial marker unit can include the surgical fiducial markers, each of which can define a circular disk having a flat upper surface. Each fiducial marker site can include a socket that receives a circular disk fiducial marker therein.

Abstract: A surgical fiducial marker positioner can include a rigid frame and a positioner coupling component. The rigid frame can support a plurality of surgical fiducial markers at fixed positions relative to each other along the rigid frame to form a fixed positional arrangement of surgical fiducial markers. The rigid frame can define a polygon arranged along a plane and the fixed positional arrangement of surgical fiducial markers can be asymmetrical. The positioner coupling component can be coupled to the rigid frame and can be configured to couple the surgical fiducial marker positioner to a separate surgical component at fixed position(s) relative to the separate surgical component, which can be a spinous process clamp. The surgical fiducial marker positioner can also include the surgical fiducial markers and fiducial marker couplers that removably couple the surgical fiducial markers to the rigid frame at the fixed positions.

Abstract: A spinous process clamp can include opposing arms, opposing gripping components, an adjustable spacing arrangement, and a coupling component. Each arm can have a top distal end, a midsection, and a bottom distal end. Each gripping component can be located proximate the bottom distal end of an arm and can be configured to grip a side of a spinous process. The arms can be pivotally coupled about their midsections to adjust the distance between the gripping components. The adjustable spacing arrangement can be coupled to the arms proximate their top distal ends and can be configured to adjust and maintain a pivoted position of the arms. The coupling component can be coupled to the top distal end of and arm and can be configured to rotationally couple the spinous process clamp to a separate surgical component, which can be a surgical fiducial marker positioner.

Abstract: A surgical catheter snap tool can include an elongated main body defining a longitudinal axis and having a front end, a back end, a top surface, first and second side surfaces, and a bottom surface. The elongated main body can include fiducial marker site(s) configured to host fiducial marker(s) at the top surface, a grip region at the first side surface, and a longitudinal groove oriented along the longitudinal axis at the bottom surface and extending from the front end to the back end. The longitudinal groove can be configured to snap onto and hold a surgical catheter therein. The tool can also include arm(s) extending laterally from the elongated main body that can have additional fiducial marker site(s). An overall system can include the surgical catheter snap tool, the fiducial markers, the surgical catheter, and/or a stylet slidably inserted within the surgical catheter.

Abstract: Various embodiments of a physical instrument are described herein. The physical instrument includes a main body with a top portion, a bottom portion, a first side and a second side. A first reflector and a first off-set reflector are each disposed on the top portion. The first reflector comprises a center region in alignment with a central axis of the main body, the central axis running from a first terminal end of the main body to a second terminal end of the main body. The first off-set reflector comprises a center region positioned according to a misalignment with the central axis of the main body. The first side includes an indentation and the second side includes a portion of a grip region with one or more grip ridges.

Abstract: A helmet air conditioning unit configured for operation with a helmet having air flow spaces within an interior space thereof, the helmet air conditioning unit including an electrical ventilating fan with a housing portion having one or more exhaust ports positionable in fluid communication with the air flow spaces within the interior space of the helmet; a battery power supply connected to energize the fan; a solar power supply coupled to recharge the power battery supply; and a fan controller coupled for actuating the fan for generating a pressurized air flow at the one or more exhaust ports of the housing portion of the fan, whereby the pressurized air flow is directed through the one or more exhaust ports of the housing portion of the fan when the fan is actuated.