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The value of non-invasive measurement of the Compensatory Reserve Index in monitoring and triage of patients experiencing minimal blood loss. Roy Nadler , Victor A. Convertino, Gadi Lending, Sami Gendler, Ari M. Lipsky, Sylvain Cardin, , Elon Glassberg. ענף הרפואה המבצעית, מקרפ"ר.
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The value of non-invasive measurement of the Compensatory Reserve Index in monitoring and triage of patients experiencing minimal blood loss Roy Nadler, Victor A. Convertino, Gadi Lending, Sami Gendler, Ari M. Lipsky, Sylvain Cardin,, Elon Glassberg ענף הרפואה המבצעית, מקרפ"ר
IDF-MC Mission for 2020: Eliminating preventable death Triage & Monitoring
Key concepts 90% of potentially salvageable casualties exsanguinate Early detection of hemorrhage is crucial Rapid evacuation & treatment as main objectives Prioritizing is a key concept of point of injury care
The gap with currently available Indices Volume of blood lost Desired vital sign Available vital signs
The Compensatory Reserve Index (CRI) • Assessment of physiological reserve • Non-invasive recording & analyzing of the arterial waveforms using machine learning techniques. • Ranges from 0 (complete decompensation) to 1 • Has been shown to correlate with central blood volume loss in laboratory conditions1 • Not operator dependent, Small and non-invasive device Convertino VA et al. Use of Advanced Machine-Learning Techniques for Noninvasive Monitoring of Hemorrhage. J Trauma 2011;71: S25–S32
Patients and Methods 264 Subjects Test Group (donated blood) N=230 Control Group N=34
Pre & post blood donation Δ 5% Δ 3% Δ 18%
One time measurements Blood loss No Blood loss
Results P= 0.02
Limitations • Technology under development • Tested in sterile environment
Summary • In our study CRI demonstrated superiority over conventional vital signs in detecting mild blood loss • CRI shows potential as a triage and monitoring tool • Unknown value in life-threatening hemorrhage • Unknown value in non hemorrhaging patients
IDF-MC Mission for 2020: Eliminating preventable death
The value of non-invasive measurement of the Compensatory Reserve Index in monitoring and triage of patients experiencing minimal blood loss Roy Nadler, Victor A. Convertino, Gadi Lending, Sami Gendler, Ari M. Lipsky, Sylvain Cardin, Elon Glassberg ענף הרפואה המבצעית, מקרפ"ר