Can you please show me how to find the glomular filtration rate for this 68 year
ID: 3483413 • Letter: C
Question
Can you please show me how to find the glomular filtration rate for this 68 year old man
Blood
Values
Urine
Values
Na+ (mEq/L)
118
Na+ (mEq/L)
310
K+ (mEq/L)
2.9
K+ (mEq/L)
108
Mg2+ (mg/dL)
0.7
Mg2+ (mg/day)
29
Ca2+ (mg/dL)
5.9
Ca2+ (mg/day)
155
HCO3 (mEq/L)
29
HCO3
13.9
Creatinine (mg/dl)
2.2
Creatinine (mg/L)
1590
PAH (mg/ml)
0.013
PAH (mg/ml)
5.91
Glucose (mg/dL)
85
Glucose
0
pCO2 (mmHg)
53
Osmolarity (mOsm/L)
400
pO2 (mmHg)
67
24hr urine volume (mL)
600
pH
7.28
pH
6.8
RBC count / µL
3.8 x 106
Hemoglobin gm/dl
9.5
Blood
Values
Urine
Values
Na+ (mEq/L)
118
Na+ (mEq/L)
310
K+ (mEq/L)
2.9
K+ (mEq/L)
108
Mg2+ (mg/dL)
0.7
Mg2+ (mg/day)
29
Ca2+ (mg/dL)
5.9
Ca2+ (mg/day)
155
HCO3 (mEq/L)
29
HCO3
13.9
Creatinine (mg/dl)
2.2
Creatinine (mg/L)
1590
PAH (mg/ml)
0.013
PAH (mg/ml)
5.91
Glucose (mg/dL)
85
Glucose
0
pCO2 (mmHg)
53
Osmolarity (mOsm/L)
400
pO2 (mmHg)
67
24hr urine volume (mL)
600
pH
7.28
pH
6.8
RBC count / µL
3.8 x 106
Hemoglobin gm/dl
9.5
Explanation / Answer
In adults, the normal GFR number is >90. GFR declines with age even in normal individuals.For a 68-year-old male, the average estimated GFR should be 85.
The GFR value estimated using the Serum Creatinine is 30 mL/min/1.73 m2.
which can be calculated by using the below formulae
GFR = 186 X (Serum Creatinine)^-1.154 X (Age)^-0.203