Abstract: An extended Kalman filter (EKF) is combined with a fixed epoch smoother (FES) to produce a new variable lag smoother (VLS). The fixed epoch lags EKF measurement time-tags with variable time lag. The combination of EKF and FES is referred to herein as a variable lag smoother (VLS).

Abstract: An improved computerized device and system for data collection and communication. The system can include component identification capability, multiple communication options, multiple optical reading and imaging options and multiple audio components. Further, the computerized can include a removable shock protection system. Multiple additional features and combinations of features are also disclosed.

Abstract: An expandable interbody spacer (10) is provided that includes a pair of oppositely facing endplate components (20, 40) and an interior component that includes one or more vertically extending stacks of arranged C-clip members (70) radially surrounding one or more bosses (30) protruding interiorly from one of the endplates, wherein the size and configuration of the bosses and the c-clip members are designed to allow the incremental expansion of expandable interbody spacer.

Abstract: An extended Kalman filter (EKF) is combined with a fixed epoch smoother (FES) to produce a new variable lag smoother (VLS). The fixed epoch lags EKF measurement time-tags with variable time lag. The combination of EKF and FES is referred to herein as a variable lag smoother (VLS).

Abstract: A spinal implant configured to facilitate focused treatment of spinal tumors includes a plurality of irradiated implant seeds configured to concentrate the dosage and duration of radiation treatment of tumors.

Abstract: An expandable intervertebral implant (10) includes a first member (20), a second member (40), and a collar operatively associated with the first and second members, wherein the collar includes a threaded mechanism so that rotation of the collar causes the second member to axially move with respect to the first member. The implant includes a ratchet mechanism (50, 80) so that when at least a predetermined amount of force is applied, the second member moves with respect to the first member in an axial, ratchet-type manner. The collar preferably includes a drive ring (50) rotatably attached to the first member and a ratchet ring (50) operatively associated with the drive ring. The ratchet ring includes an inner bore having at least one corresponding ratchet thread tooth form formed thereon for engaging a ratchet thread tooth form formed on the second member.

Abstract: A minimally invasive fixation system and method for providing access to a surgical site. The fixation system may include a holding assembly, the holding assembling preferably including a lateral implant holder which may be attached to a pedicle screw and a sleeve positioned in connection with the lateral implant holder to prevent the lateral implant holder from separating from the pedicle screw. The sleeve may further include a tissue protection portion to keep the tissue out of the surgical site. A holding sleeve may be operably connected to the holding assembly and pedicle screw and may be used to insert the pedicle screw into the body. Multiple constructs may be inserted into the body so that a portion of the holding assembly extends from the body and provides access to and visualization of the surgical site. A rod holder may also be used to insert a rod into the head of the screw. The rod may be held by the rod holder so that the rod may be angulated as the rod is inserted into the screw heads.

Abstract: An expandable access device for providing access to a surgical site and incorporating a mobility member. The expandable access device may have an access portion, an expandable portion, a mobility member connecting the access portion and the expandable portion, and a passageway extending therethrough. The mobility member may connect the access portion and the expandable portion so that the access portion may be translated and/or rotated relative to the expandable portion using a surgical or diagnostic instrument/device and/or a finger. The access portion may have a fixed cross-section or may be expandable. Moreover, the expandable portion of the expandable access device may have an unexpanded and expanded position. One or more tools may be inserted through the passageway and may be used to move the expandable portion between the expanded and unexpanded position. The expandable access device may be inserted into the body down towards a surgical site, with the expandable portion in the unexpanded position.

Abstract: Method of decoking furnace tubes using a turbulent stream of impact resistant, particle-enriched gas. Non-angular, non-abrasive particles are entrained at a concentration of about 0.1 to about 10 pounds per pound of gas, and the gas is introduced into the inlet end of the furnace tubes at a gas flow rate corresponding to an outlet gas velocity of from about 5,000 feet per minute up to sonic velocity of said gas, preferably at an outlet gas velocity of about 14,000 to 40,000 feet per minute.

Abstract: In a sifting machine having a driven vibratory screen assembly comprising a so-called sifting basket of which a screen forms the base, the screen is releasably located by a plurality of spaced bars which extend across the screen and project at their ends through side walls of the basket. The projecting end portions of the bars are bolted to external supports on the side walls, and the bars carry spring-loaded plungers which press the frame of the screen against internal ledges on the side walls.

Abstract: Method of decoking furnace tubes of serpentine configuration using a turbulent stream of impact resistant, non-angular, non-abrasive particles entrained in a gas stream. The particles are entrained at a concentration of 0.1 to 1.0 pounds per pound of gas and the gas is introduced into the inlet end of the furnace tubes at a gas flow rate corresponding to an outlet gas velocity of 14,000 to 20,000 feet per minute.