Which CK level is often considered an initial indicator of rhabdomyolysis?

Which CK level is often considered an initial indicator of rhabdomyolysis?

• A. 100
• B. 1000
• C. 5000
• D. 10000

Answer: (B)

Muscle injury releases CK into the bloodstream, and in rhabdomyolysis the enzyme climbs well above normal. An early warning level is typically around a fivefold rise above the upper limit of normal, which many clinicians use to flag possible rhabdomyolysis. This threshold helps catch the problem early, before CK climbs to extremely high values, and prompts actions to protect kidney function and monitor for complications. CK levels then continue to rise over hours to days, peaking later, so that initial detection hinges on recognizing that early jump above normal. Mild increases can occur with minor muscle injury, while very high levels reflect established, more severe breakdown. So the value that best represents the initial indicator is the one that corresponds to that fivefold rise, signaling potential rhabdomyolysis.

Muscle injury releases CK into the bloodstream, and in rhabdomyolysis the enzyme climbs well above normal. An early warning level is typically around a fivefold rise above the upper limit of normal, which many clinicians use to flag possible rhabdomyolysis. This threshold helps catch the problem early, before CK climbs to extremely high values, and prompts actions to protect kidney function and monitor for complications. CK levels then continue to rise over hours to days, peaking later, so that initial detection hinges on recognizing that early jump above normal. Mild increases can occur with minor muscle injury, while very high levels reflect established, more severe breakdown. So the value that best represents the initial indicator is the one that corresponds to that fivefold rise, signaling potential rhabdomyolysis.