この変換ツールの目的
このツールは、クレアチニンの値を µmol/L, mmol/L, mg/dL, mg/100mL, mg%, mg/L, µg/mL の間で変換します。検査報告書にクレアチニンが mg/L で示されており、µmol/L, mmol/L, または mg/dL での相当値が必要な場合に便利です。この変換はクレアチニン専用であり、尿素、BUN、シスタチンC、またはその他の腎マーカーには使用しないでください。
対応単位
変換式
変換例
重要な検査上の注意
How to Convert Creatinine Units
For creatinine, 1 mg/dL is equivalent to 88.4 µmol/L. To convert mg/dL to µmol/L, multiply by 88.4. To convert µmol/L to mg/dL, divide by 88.4.
When creatinine is reported in mg/L, multiply by 8.84 to obtain µmol/L. Conversely, divide µmol/L by 8.84 to obtain mg/L.
Equivalent Creatinine Reporting Units
- mg/dL, mg/100mL, and mg% represent the same numerical concentration.
- mg/L and µg/mL are numerically equivalent.
- 1 mmol/L equals 1000 µmol/L.
- 10 mg/L equals 1 mg/dL and approximately 88.4 µmol/L.
Clinical Context and Limitations
Creatinine is a waste product associated with normal muscle metabolism and is commonly used as a filtration marker. Serum creatinine is frequently incorporated into equations that estimate glomerular filtration rate, but the concentration alone does not provide a complete assessment of kidney function.
Interpretation should consider the specimen type, laboratory method, local reference interval, and the patient’s clinical context.
- Creatinine concentration may be influenced by muscle mass, age, diet, hydration, pregnancy, medications, and acute illness.
- A creatinine result should not be converted directly into an eGFR without using a validated equation and the required patient variables.
- Kidney assessment commonly combines serum creatinine-based eGFR with urine albumin measurement when clinically appropriate.
- Reference intervals for serum creatinine must not be applied to urine creatinine results.
References and Conversion Standards
- Clinical Chemistry. Instructions to Authors: serum creatinine in mg/dL is converted from µmol/L by dividing by 88.4.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Chronic Kidney Disease Tests and Diagnosis.
- NIDDK. Clinical Measurements and eGFR Accuracy: factors affecting serum creatinine and estimated GFR.