Final answer:
A creatinine level of 4 mg/dL in a client with AKI is significantly higher than the normal range and indicates severe renal impairment, which needs to be reported to the healthcare provider.
Step-by-step explanation:
In the case of a client with acute kidney injury (AKI), the serum lab finding that should be reported to the provider is C. Creatinine 4 mg/dL. This value significantly exceeds the normal range of plasma creatinine, which is 0.8-1.2 mg/dl for males and 0.6-0.9 mg/dl for females, indicating impaired renal function.
The other values provided, such as Potassium 5 mEq/L and Calcium 9 mg/dL, are within normal ranges. Amylase at 84 units/L is also considered normal as it does not directly correlate with renal function. In contrast, a creatinine level of 4 mg/dL is much higher than the normal range and suggests severe renal impairment. This is a critical indicator of renal function and warrants immediate attention and action by the healthcare provider.