Respiratory

Residual Volume (RV)

Normal Range
1.1–2.4 Liters (or 80-120% of predicted)
Sample Type
Standard
Fasting
No
Unit
Liters

Residual Volume is the amount of air remaining in the lungs after a forceful, maximal exhalation. In a Pulmonary Function Test (PFT), it is a critical measure to diagnose 'air trapping.' RV cannot be measured by simple spirometry and requires body plethysmography or gas dilution techniques. It helps differentiate between obstructive and restrictive lung diseases.

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Check Your Result

Interactive
Liters

Enter your lab result to see where you stand compared to the standard reference range.

Why Context Matters

RV measurement is highly dependent on patient effort and technique. Sub-optimal exhalation can falsely elevate the RV. Additionally, results are calculated based on 'predicted values' that may not accurately reflect individuals of diverse ethnic backgrounds or unique body habitus.

Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.

Clinical References

Source-of-truth databases and clinical guidelines for Residual Volume (RV):

Research & Guidelines

Related Indicators

Pulmonary Function Test

View Range

Forced Vital Capacity (FVC)

View Range

Forced Expiratory Volume (1s) (FEV1)

View Range
DR

Medically Reviewed by Dr. Binoy Babu, MBBS

Board Certified Doctor • 10+ Years Clinical Experience

Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.

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