Alternatively, IVC filters can be placed at the bedside either using fluoroscopy or transabdominal or intravascular ultrasound. Knowledge of the normal and variant anatomy of the vena cava is important for successful placement of vena cava filters and prevention of complications.
Welder's Glass. Welder's Shade Glass. A heat resistant grey-green tinted glass made to provide the correct eye protection for every welding operation. The shade numbers 1-14 refer to the density needed for the different welding operations. The higher the number, the darker the shade. Stock sheet size is 0.108 thick in Density 3 through Density 14.
Welders are protected from this light by wearing a very dark filter that allows them to look safely at the welding arc, enabling them to produce a quality welded seam. The type of welding application determines the correct shade for eye protection. The Occupational Safety and Health Administration (OSHA) regulation 1910.133 contains a guide for choosing the appropriate filter lenses, based on various operations (see Figure 1at the bottom of page).