Positive pressure breath controller

Preventive measures to reduce the risk of NP include maintaining semiupright patient position to reduce aspiration, frequent coughing, chest physiotherapy, and early ambulation to prevent atelectasis and retained secretions. Deep breathing exercises, incentive spirometry, and intermittent positive pressure breathing (IPPB) may benefit patients with underlying pulmonary dysfunction. Effective pain control also facilitates coughing and the expectoration of aspirated secretions (2). 

The base biphenyl has 10 hydrogen atoms four of them (2, 6, 2, 6 ) are near the bridge and are named the a positions, four of them (3, 5, 3, 5 ) are away from the bridge and are named the p positions, and two of them (4, 4 ) are opposite the bridge and are named the y positions. There are three forms for mono-chloro biphenyl, depending on the position of the chlorine atom, and they each have different properties. The PCBs are a set of 210 compounds with 0 to 10 chlorine atoms in a molecule. Monsanto made them under the trade name Aroclor, and they came in a number of mixtures the light Araclor 1221 is basically mono- and di-chloro, the medium Aroclor 1248 is principally tri-, tetra- and penta-chloro, and the heavy Aroclor 1260 is principally hexa- and hepta-chloro. We are concerned with the transportation and concentration of these chemicals, particularly in fish and humans, which are controlled by the three parameters of vapor pressure (breathe in air), solubility in water (drink water), and octanol-water partitions (accumulation in fat). 

PERSONAL PROTECTION wear impervious protective clothing, including boots, chemical-resistant gloves, and gas-tight suit wear dust- and splash-proof safety goggles a closed system of local exhaust ventilation is required to control emissions at the source and to prevent dispersion into general work area appropriate respirators are needed in areas where exposure would be above the permissible exposure level wear positive-pressure self-contained breathing apparatus in unknown concentrations of IDLH conditions maintain eyewash baths or safety showers in work area. 

---