What should be monitored closely in a casualty showing signs of shock?

Monitoring heart rate and blood pressure in a casualty showing signs of shock is critical because these vital signs provide essential information regarding the cardiovascular status and overall perfusion of the body. In shock, the body is unable to adequately supply blood to the organs, leading to potentially life-threatening conditions. An elevated heart rate may indicate compensatory mechanisms in response to decreased blood volume or blood pressure. Conversely, a significantly low blood pressure can illustrate that the body’s ability to maintain circulation is severely compromised.

By closely observing these parameters, medical personnel can quickly assess the severity of shock, guide treatment decisions, and determine the urgency of interventions required to stabilize the casualty. While other factors such as oxygen levels, breathing patterns, and cognitive function are important in a broader assessment of a casualty's condition, heart rate and blood pressure specifically provide direct insight into the cardiovascular response to shock.