Dr. Christi's ventilator
A bottle of shampoo as a respirator
Because of pneumonia, the lungs fill with fluid or pus, reducing their ability to absorb oxygen. In developed countries, hospitals use respirators, but each machine cost up to $15,000 and requires trained personnel to operate. This solution is often far too expensive for hospitals in developing countries, such as Bangladesh, which use low-flow oxygen as an alternative.
Dr Christi used a continuous positive airway pressure (CPAP) device at a hospital in Melbourne, Australia. that's what inspired him, as he returned to Bangladesh, to develop a manual respirator made from a standard plastic shampoo bottle.
Dr Mohammod Jobayer Christi published the findings in The Lancet journal and demonstrated that children treated with the bubble CPAP machine had 75% lower mortality rates than those treated with low-flow oxygen. For a unit cost of only $1.25 ! Since then, more than 600 children have benefited from it.