TY - JOUR AU - A. Bhattacharyya AU - A. Gupta AU - H. Nayar PY - 2014/02/12 Y2 - 2024/03/29 TI - New Low Resistance Respiratory Valve JF - Defence Science Journal JA - DSJ VL - 32 IS - 2 SE - General Papers DO - 10.14429/dsj.32.6199 UR - https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/6199 AB - Fabrication at DIPAS of a low resistance respiratory valve from totally indigenous materials costing Rs.500/- is reported here. Experimental data reveal that the dead space in the valve is 230 ml and the pressure drop across the valve (i.e. the resistance) at a flow rate of 240 litres per minute is 1 cm of water. ER -