Differential diagnostic importance of the creatine kinase isoenzyme pattern in severe traumatic head lesions

Area of Science:

• Biochemistry
• Clinical Chemistry
• Neurology

Background:

• Creatine kinase (CK) and its isoenzyme CK-MB are crucial biomarkers.
• Elevated CK levels can indicate muscle damage, but differentiating the source is vital.
• Acute traumatic brain injuries present a challenge in interpreting CK levels.

Purpose of the Study:

• To investigate the release of CK and CK-MB from the cerebrum in patients with acute traumatic brain injuries.
• To determine if cerebral CK isoenzyme release affects the diagnostic utility of CK-MB in intensive care.

Main Methods:

• Simultaneous measurement of total CK and CK-MB.
• Blood samples collected from the internal jugular vein and a cubital vein.
• Study conducted on 8 patients with acute traumatic cranial lesions.

Main Results:

• No significant release of CK isoenzymes from the cerebrum was detected.
• Cerebral contribution to CK levels in jugular venous blood was negligible.
• CK-MB levels in jugular blood did not significantly differ from peripheral levels.

Conclusions:

• Acute traumatic cranial lesions do not substantially impact CK isoenzyme levels originating from the brain.
• CK-MB measurements remain reliable for differentiating between skeletal and cardiac muscle affections in intensive care settings.
• Cerebral CK release is not a confounding factor in diagnosing myocardial injury post-head trauma.