What is the purpose of establishing a reassessment interval in EMS?

• A. To schedule hand-offs
• B. To inform hospital billing
• C. To lengthen transport time
• D. To detect deterioration or improvement and guide ongoing treatment; intervals vary by protocol (unstable 5 minutes, stable 15 minutes)

Answer: (D)

Reassessment intervals exist to keep a patient’s status under continuous review so you can see if they’re getting better or worse and adjust care accordingly. In EMS, unstable patients can change quickly, so checking every few minutes (about 5) helps catch deterioration early and allows immediate intervention. Stable patients are less volatile, so reassessments every roughly 15 minutes balance monitoring with practical transport needs while still ensuring the patient remains safe. Reassessments look at vitals, airway/breathing, circulation, mental status, and response to treatments to guide ongoing decisions and determine if escalation or de-escalation of care is needed. The other options aren’t about monitoring and guiding treatment, which is the core purpose of the reassessment interval.