This document provides 10 examples of medical cases involving the calculation of creatinine clearance or LDL cholesterol from patient lab results. For each case, it lists the key lab values and medical details provided and asks the reader to use these to calculate the requested values and determine other relevant details like reference ranges or whether the LDL value is valid.

1. Creatinine Clearance

2. 01
Urine volume: 1540 ml
Collection time: 24 hours
Urine creatinine: 75 mg/dL
Serum creatinine: 0.8 mg/dl
Body surface area: 1.53
1. Determine the creatinine clearance.
2. Determine the type of creatinine clearance computed.

3. 02
Urine volume: 540 ml
Collection time: 12 hours
Urine creatinine: 75 mg/dL
Serum creatinine: 1.2 mg/dl
Body surface area: 1.83
1. Determine the creatinine clearance.
2. Determine the type of creatinine clearance computed
(corrected or uncorrected)

4. 03
Urine volume: 1140 ml
Collection time: 12 hours
Urine creatinine: 55 mg/dL
Serum creatinine: 0.9 mg/dl
Body surface area: 1.59
1. Determine the creatinine clearance.
2. Determine the type of creatinine clearance computed.

5. 04
The following results were obtained:
Urine creatinine : 7956 µmol/L
Serum creatinine: 79.6 µmol/L
Body surface area: 1.73 m2
Total urine in 24 hours: 1500 ml
Compute for creatinine clearance?

6. 05
1. Determine the patient’s body surface area
2. Determine the patient’s creatinine clearance (uncorrected creatinine clearance)
3. Determine the patient’s creatinine clearance (corrected creatinine clearance)

7. 06
A male aged patient was rushed to the hospital with
loin pains and a serum creatinine of 150 umol/L.
A 24-hour urine output recorded a urine creatinine of
7.5 mmol/L in a 2160 ml collection
Compute for creatinine clearance?

8. 07
Determine the LDL-cholesterol given the following:
HDL-cholesterol = 50 mg/dL
Total cholesterol = 300 mg/dL
Triglycerides = 200 mg/dL
1. Compute for LDL-cholesterol mg/dl?
2. State the reference range for Total Cholesterol
3. State the reference range for Triglycerides

9. 08
Determine the LDL-cholesterol given the following:
HDL-cholesterol = 50 mg/dL
Total cholesterol = 9.05 mmol/L
Triglycerides = 6.50 mmol/L
1. Compute for LDL-cholesterol in mmol/L
2. Is the computed LDL-cholesterol VALID? Yes or NO
3. What lipoprotein is associated with post-prandial
turbidity?

10. 09
State the conversion factors for the
following:
1.Cholesterol
2.Triglycerides
3.HDL-Cholesterol

11. 10
State three (3) reasons/conditions that will
INVALIDATE the LDL-cholesterol computed
by the Friedewald equation:
1.
2.
3.