Patients with sickle cell disease may be at risk for acute kidney injury (AKI)during sickle cell crisis (pain or acute chest syndrome). This study will evaluate the role of hemolysis during SCD crisis on the development of AKI and the role for monitoring urine biomarkers during an admission for crisis and during well clinic follow-up.

Patients admitted to the hospital for acute chest syndrome or vaso-occlusive pain events may consent to participate in this study. Patients will consent to daily blood and urine collection during their hospitalization and during well clinic visits.

Each AM, participants will have blood and urine collected, processed, and strored for future analysis of hemolytic markers and biomarkers of kidney injury. Patients will also have strict urine output recorded. Acute kidney injury (AKI) will be defined by the current KDIGO definition based on either a rise in serum creatinine or decline in urine output. Patient medical course will be reviewed to determine interventions and outcomes of their admission based on the development of AKI.

Inclusion Criteria:

• Patients with HbSS or SB0 thalassemia admitted for vaso-occlusive pain crisis or acute chest syndrome
• Able to sign informed consent

Exclusion Criteria:

-

Patients with HbSS or SB0 thalassemia admitted to Children's of Alabama for a vaso-occlusive pain crisis or acute chest syndrome.