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PFT Machine
📌 What does a PFT Machine measure?
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1. Spirometry
- Measures how fast and how much air a patient can inhale/exhale.
- Key values: FVC, FEV1, FEV1/FVC ratio
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2. Lung Volumes
- Measures the total air lungs can hold.
- Helps diagnose restrictive lung diseases.
- Values: TLC, RV
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3. Diffusion Capacity (DLCO)
- Checks how well lungs transfer oxygen into the blood.
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4. Flow–Volume Loop
- Graph that helps identify obstructive vs restrictive patterns.
📌 Uses of a PFT Machine
- Diagnosis of lung diseases
- Asthma
- COPD
- Interstitial lung disease
- Pulmonary fibrosis
- Pre-operative fitness assessment - To check if the patient is fit for surgery.
- Monitoring disease progression - Useful in chronic lung conditions or after lung transplant.
- Response to treatment - Checks improvement after bronchodilator drugs.
📌 Advantages of PFT Machine
- Non-invasive & painless
- Quick results (usually 10–20 minutes)
- Accurate assessment of lung health
- Early detection of respiratory problems
- Helps guide treatment plans
📌 Components of a PFT Machine
- Spirometer
- Mouthpiece & tubing
- Flow sensor
- Body plethysmograph (for lung volume tests)
- Gas analyzers (for DLCO test)
- Computer/software for interpretation
📌 Who operates it?
Respiratory therapists, pulmonary technicians, or trained medical staff