You can't treat what you can't measure. Pulse oximeters, blood-pressure cuffs, thermometers, glucometers, and diagnostic tools to assess a casualty, guide treatment, and trend the response to it.
Monitoring runs through the whole MARCH sequence — from confirming an airway to catching the hypothermia in Head/Hypothermia. Pair with CPR & AED for cardiac response.
Vital signs turn a guess into an assessment. A single reading tells you where the casualty is now; repeated readings tell you whether they're getting better or worse and whether your treatment is working. The right tools are the ones that give you fast, reliable numbers in field conditions.
| Tool | Measures |
|---|---|
| Pulse oximeter | Oxygen saturation and pulse rate — a fast read on breathing and perfusion |
| Blood-pressure cuff | Perfusion pressure; a falling trend signals developing shock |
| Capnography (ETCO2) | Ventilation and airway-device placement confirmation |
| Thermometer | Core temperature — the H in MARCH; hypothermia worsens bleeding |
| Glucometer | Blood glucose — rules a treatable cause in or out of altered mental status |
Monitoring is only useful if it drives decisions. Take a baseline set of vitals, act on it, then reassess after every intervention — a tourniquet, a fluid bolus, an airway. In trauma, watch temperature closely: hypothermia is part of the lethal triad that drives coagulopathy, so a thermometer is a hemorrhage-control tool as much as a diagnostic one.
A pulse oximeter is the highest-value starting point, giving a fast read on oxygen saturation and pulse rate. A blood-pressure cuff is the natural second tool for tracking perfusion and catching developing shock.
Hypothermia is part of the lethal triad, alongside acidosis and coagulopathy, that impairs the blood's ability to clot. Measuring and managing core temperature is part of hemorrhage control, not just comfort.
Capnography measures exhaled carbon dioxide (ETCO2) to assess ventilation and confirm that an airway device is correctly placed. It is an advanced monitoring tool used by trained providers.
Low or high blood glucose is a common and treatable cause of altered mental status that can mimic other emergencies. A glucometer rules it in or out quickly so you don't miss a reversible problem.
Take a baseline early, then reassess after every significant intervention and at regular intervals during transport. Trends matter more than any single number for deciding whether a casualty is improving or deteriorating.
MED-TAC International Corp. is a clinician-founded, veteran-led tactical medicine provider. Product references to CoTCCC reflect committee recommendations and do not imply FDA approval or certification. This content is educational and is not a substitute for hands-on training or medical direction.
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