After splinting an injured limb, what is the next step an EMR should take?

Once an injured limb is splinted, it is crucial for the Emergency Medical Responder to reassess sensation, movement, and pulses in the affected limb. This step is vital to ensure that the splint is properly applied and that blood flow is not compromised. By checking these vital signs, the EMR can determine if there are any changes in the patient's condition that may require further intervention.

Monitoring sensation will help identify whether nerve function is intact, assessing movement can indicate if the injury has affected mobility, and checking pulses is essential to confirm that circulation is adequate. Ensuring that these functions remain stable after splinting helps in providing safe and appropriate care before further medical help arrives.

Other steps mentioned, such as leaving the limb undisturbed, performing CPR, or applying ice, do not address the immediate responsibility of ensuring the stability and integrity of the limb post-splinting. They either do not contribute to the assessment of the effectiveness of the splint or are unrelated to the management of a splinted limb in specific contexts. Thus, reassessing sensation, movement, and pulses after splinting is indeed the most appropriate next step.