Ambu bag Ventilator gets new life with COVID 19

Many innovators in India are working on this Ambu Bag deign with improvements as an alternate to expensive ventilator. Brief history of this product.

The original bag-valve-mask concept was developed in 1953 by the German doctor Holger Hesse and his partner Danish anesthetist Henning Ruben, following their initial work on a suction pump. Their resuscitator, named “Ambu” (Artificial Manual Breathing Unit), was manufactured and marketed in 1956 by their company.

The Danish manufacturer, Testa Laboratory made the first commercially produced Ambu bags in 1957. The company later changed its name to Ambu International. Many other companies now also make self-inflating “bag and mask” resuscitators, like the one shown here. These have become standard equipment in ambulances, hospital emergency rooms, and patient rooms.

A dozen ventilator prototypes at different stages have been developed in March 2020 alone by teams in different countries – and organising on Slack channels, Facebook groups, and GitHub repositories.Some of the most basic open-source ventilator models are based on an ‘ambu-bag’.

A word of caution:

The results of this review, however, found that the tested and peer-reviewed ventilator systems lacked complete documentation and that the current open systems that were documented were either at the very early stages of design or had undergone only early and rudimentary testing. With the considerably larger motivation of an ongoing pandemic, it is assumed these projects will garner greater attention and resources to make significant progress to reach a functional and easily replicated open source ventilator system. There is a large amount of technical future work needed to move open source ventilators up to the level considered adequate for scientific-grade equipment and further work still to reach medical-grade hardware. Future work is needed to achieve the potential of this approach not only on the technical side, but also by developing policies, updating regulations and securing funding mechanisms for the development and testing of open source ventilators for both the current COVID19 pandemic, as well as for future pandemics and for everyday use in low-resource settings.