Cambridge Respiratory Innovations Ltd

Gas Sensing Solutions Ltd.

Science To Business Limited

Wideblue Ltd

Russell Overend

Julian Charles Carter

Mary Anne Cordeiro

Stephen Mcintosh

Jeremy Walsh

Craig Whitehill

Colin Phimister

Des Gibson

Calum Mcgregor

Jeremy Mauger

Alastair Wilson

Ewan Wadell

We describe a capnometer for detecting a concentration of a component in a gas, wherein said gas is inhaled and/or exhaled by a patient, said capnometer comprising: an air flow region through which said gas passes to and/or from said patient's lung; a mid-IR semiconductor emitter configured to provide IR light at a wavelength in the range 3-5 μm; a mid-IR semiconductor detector to detect said IR light; a reflector to reflect said IR light emitted by said emitter; wherein said emitter, said detector and said reflector are arranged such that said IR light emitted by said emitter passes through said air flow region via said reflector to said detector. The reflector is selected from a Fresnel reflector and a reflective diffractive optical element, such as a Fresnel zone plate.

Capnometer

Growing community of inventors

Glasgow, United Kingdom

Russell Overend