The goal of the continuous interscalene block is similar to the non-ultrasound-based techniques: to place the catheter in the vicinity of the trunks of the brachial plexus between the scalene muscles.The procedure consists of three phases: needle placement, catheter advancement, and securing of the catheter.he goal of the continuous interscalene block is similar to the non-ultrasound-based techniques: to place the catheter in the vicinity of the trunks of the brachial plexus between the scalene muscles.
Answers. Best Answer: It should be a chemical change, since it is likely that a reaction took place. Color is a physical characteristic of a substance, but a change in color is not.
Examples of Physical Changes. 1  crumpling a sheet of aluminum foil. 2  melting an ice cube. 3  casting silver in a mold. 4  breaking a bottle. 5  boiling water. 6  evaporating alcohol. 7  shredding paper. 8  sublimation of dry ice into carbon dioxide vapor.