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The Cormack–Lehane system classifies views obtained by direct laryngoscopy based on the structures seen. It was initially described by R.S. Cormack and J. Lehane in 1984 as a way of simulating potential scenarios that trainee anaesthetists might face. [1] A modified version that subdivided Grade 2 was initially described in 1998. [2]
The score is assessed by asking the patient, in a sitting posture, to open their mouth and to protrude the tongue as much as possible. [1] The anatomy of the oral cavity is visualized; specifically, the assessor notes whether the base of the uvula, faucial pillars (the arches in front of and behind the tonsils) and soft palate are visible.
"The most useful modification is a subclassification of grade 3 into 3a when the epiglottis can be lifted from the posterior pharyngeal wall and 3b when it cannot be lifted." Indeed this is true, and in fact, it is more important whether the epiglottis can be lifted or not, rather than the vocal cords or arithenoids are fully seen (2a/2b)
The Akai VS-2 was the first VCR with an on-screen display, originally named the Interactive Monitor System. By displaying the information directly on the television screen, this innovation eliminated the need for the user to be physically near the VCR to program recording, read the tape counter, or perform other common features.
The Grid Analysis and Display System [2] (GrADS) is an interactive desktop tool that is used for easy access, manipulation, and visualization of earth science data. The format of the data may be either binary , GRIB , NetCDF , or HDF -SDS (Scientific Data Sets).
Video overlay is any technique used to display a video window on a computer display while bypassing the chain of CPU to graphics card to computer monitor. This is done in order to speed up the video display, and it is commonly used, for example, by TV tuner cards and early 3D graphics accelerator cards. The term is also used to describe the ...
The TMS9918 generates both grid-based character graphics (used to display text or background images) and sprites used for moving foreground objects. The key features of this chip are, as highlighted in a 1980 presentation by Karl Guttag (one of the designers): [1] 256 by 192 full color pixels per screen; 15 different colors and/or shades
A vector monitor, vector display, or calligraphic display is a display device used for computer graphics up through the 1970s. It is a type of CRT , similar to that of an early oscilloscope . In a vector display, the image is composed of drawn lines rather than a grid of glowing pixels as in raster graphics .