Improving inhalers

The South-East England Development Agency (SEEDA) has awarded aerodynamics research engineer S&C Thermofluids a grant towards a £70,000 research project to improve the mixing and efficacy of drug delivery for pressurised metered dose inhalers (pMDIs) – a common type of asthma inhaler.

Although widely used, relatively cheap and easily portable, pMDIs are not a particularly efficient way of delivering drugs to the lungs, with a high proportion of the dose being deposited on the inhaler or in the mouth and throat of the user.

Research suggests as little as 10 to 15 per cent of the dose from a standard pMDI may reach the lungs.

S&C are applying their expertise in what is known as the Coanda effect, used in the design of rapid mixing devices, to investigate and develop a novel nozzle design for pMDIs.