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.
Having a darker lens will cause less eye stress over a long welding period. Auto Darkening Welding Helmets and Lenses. Auto darkening welding helmets are a great innovation and will boost the productivity of any welding job, give the operator better control over the work and reduce the possibility of any arc flash.