Glomerular Capillary Blood Pressure Calculator
Estimate glomerular capillary blood pressure using mean arterial pressure and arteriolar resistance values.
Physiological Parameters
Results
Enter your values and click "Calculate GCBP" to see results
Glomerular Capillary Blood Pressure
The glomerular capillary blood pressure is the pressure inside the tiny blood vessels within each kidney's filtering units. This pressure plays a crucial role in determining how effectively the kidneys can filter waste and excess fluids from the blood.
While direct measurement isn't practical, this calculator estimates the pressure using relationships between overall blood pressure and the resistance created by the kidney's blood vessels. Understanding these dynamics helps explain how the kidneys maintain proper filtration rates.
The Calculation Formula
Simplified Educational Model
PGC = MAP × (Efferent Resistance ÷ (Afferent Resistance + Efferent Resistance))
Where:
- PGC = Glomerular Capillary Pressure
- MAP = Mean Arterial Pressure
- Resistance values are expressed as percentages
Unit conversion: 1 kPa = 7.50062 mmHg (automatically handled).
Example Calculations
| MAP (mmHg) | Afferent (%) | Efferent (%) | GCBP (mmHg) |
|---|---|---|---|
| 95 | 40 | 60 | 57.0 |
| 90 | 50 | 50 | 45.0 |
| 100 | 30 | 70 | 70.0 |
How to Use This Calculator
Set Mean Arterial Pressure
Enter your MAP value and select the appropriate unit.
Adjust Resistance Values
Use the interactive sliders to set afferent and efferent arteriolar resistance effects.
Get Your Pressure Estimate
Click calculate to see the estimated glomerular capillary pressure.