How Doctors Assess the Need for a Portable Oxygen Concentrator (POC)

Doctors use clinical assessments, diagnostic tests, and patient history to determine whether a patient requires a Portable Oxygen Concentrator (POC). The evaluation focuses on oxygen levels, underlying respiratory conditions, and lifestyle needs. Here’s a breakdown of the assessment process:

1. Medical History & Symptoms Evaluation

Doctors begin by assessing:

Diagnosis of a respiratory condition (e.g., COPD, pulmonary fibrosis, emphysema)
Symptoms of low oxygen levels (e.g., shortness of breath, fatigue, dizziness, confusion)
Impact on daily life – Can the patient perform routine activities without distress?

2. Oxygen Level Testing (Oximetry & ABG Tests)

a) Pulse Oximetry Test

• A non-invasive test that measures oxygen saturation (SpO₂) in the blood using a fingertip device.

• Normal SpO₂ Levels: 95–100%

• Oxygen Therapy Needed If: SpO₂ < 88% at rest or during activity.

b) Arterial Blood Gas (ABG) Test

• Measures the exact amount of oxygen (PaO₂), carbon dioxide (PaCO₂), and pH levels in arterial blood.

3. Exercise & Walking Tests

Doctors evaluate how oxygen levels change during physical activity:

a) 6-Minute Walk Test (6MWT)

• The patient walks for 6 minutes while wearing a pulse oximeter.

• If SpO₂ drops below 88%, supplemental oxygen is usually required.

b) Titration Test

• Determines the oxygen flow rate needed to maintain SpO₂ > 90% during exertion.

• Helps decide between pulse flow vs. continuous flow POCs.