The EMMA Emergency Capnometer: a Miniaturized Transportable Device for
Monitoring of End-Tidal Carbon Dioxide
Ernst Zadrobilek, MD1,
Schirin M. Missaghi, MD2,
of Anesthesia and Intensive Care, Chairman of the Austrian Working
Group for Airway Management,
Anesthetist and Intensive Care Physician, Department of Anesthesia
and Intensive Care, Empress Elisabeth Hospital of the City of
Vienna, Vienna, Austria.
Address correspondence and comments to
Received from the Austrian
Working Group for Airway Management, Vienna, Austria.
September 22, 2010.
The correct citation of this
communiction of new equipment and techniques is:
ZadrobilekE, Missaghi SM,
Krasser K. The EMMA Emergency Capnometer: a
miniaturized transportable device for monitoring of end-tidal carbon dioxide. Internet Journal of Airway Management
Available from URL:
Date accessed: month day, year.
updated: September 22, 2010.
Phasein Medical Technologies (Danderyd, Sweden) recently launched the
EMMA Emergency Capnometer (EEC), a compact, robust, and miniaturized transportable
device for monitoring of end-tidal carbon dioxide. The EEC is a
low-weight, battery-powered capnometer for mainstream monitoring
of end-tidal carbon dioxide (and also respiratory rate),
displaying carbon dioxide in kPa or mmHg and with (EMMA Monitor)
or without alarms (EMMA Analyzer). The EEC is used with a
disposable airway adapter; the dead-spaces of the models for adults/pediatrics
and for infants are 6 and 1 ml, respectively.
The measurement of carbon dioxide by the EEC is based on the
fact that different gas components absorb infrared light at
specific wavelengths. A beam of infrared light is directed
through the respiratory flow in the adapter. As the beam passes
through the adapter, some lightis absorbed by the gas mixture.
The amount of light absorbed is measured by a miniaturized
two-channel spectrometer positioned to receive the infrared
light beam. The spectrometer converts the light beam to an
electrical signal, which is converted to a digital value.
Warming-up time for operation and full accuracy requires only 5
seconds. Two AAA cell alkaline or non-rechargeable lithium
batteries allow 8 and 12 hours of normal use, respectively.
The EEC may be a valuable device for verification of tracheal
intubation and monitoring of end-tidal carbon dioxide during
transportation of patients requiring mechanical ventilation and
may improve patient care in emergency situations; unfortunatebly,
there are currently no studies available supporting this
Hildebrandt and co-workers (1) evaluated the EEC during
face-mask ventilation obtaining a wide range of carbon dioxide
values. The EEC slightly under-read the end-tidal
carbon dioxide but was generally comparable with a free-standing
capnometer; these differences were estimated to be of limited
importance in the clinical setting. The precision of the EEC was
similar whether new batteries or batteries with reduced voltage
The costs of
the EEC and the disposable airway adapter are about 990 and 25 Euro (exclusive value-added taxes,
according to the offer of the Austrian distributor of the EEC, queried in
September 2010), respectively.
T, Espelund M, Olsen KS. Evaluation of a transportable capnometer for
monitoring end-tidal carbon dioxide. Anaesthesia