| Blood Pressure Category | Systolic (mm Hg) | Diastolic (mm Hg) |
| Normal | Less than 120 | Less than 80 |
| Elevated | 120-129 | Less than 80 |
| High Blood Pressure Stage 1 | 130-139 | 80-89 |
| High Blood Pressure Stage 2 | 140 or Higher | 90 or higher |
| Hypertensive Crisis | Higher than 180 | Higher than 120 |
| VS Feature | Nebulizer | Oxygen Concentrator |
| Primary Function | Converts liquid medication into a fine aerosol for direct delivery to the airways and lungs for localized treatment. | Provides a stable concentration of oxygen (typically>90%) to correct systemic hypoxemia (low blood oxygen). |
| Indicated Symptoms |
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Usage Timing | Used intermittently (10-20 minutes per session) as prescribed when symptoms like wheezing, coughing, or difficulty breathing occur. | Often requires long-term daily use (several hours to 24 hours/day) based on SpO₂ (blood oxygen saturation) monitoring. |
| Requires Medication | Yes. Must be used with nebulizer-specific solutions (e.g., budesonide, albuterol, acetylcysteine). | No. Provides medical-grade oxygen independently. |
| Mechanism | Physical nebulization + localized anti-inflammatory, bronchodilator, and mucolytic effects of drugs. | Physical oxygen separation + increasing arterial oxygen partial pressure to maintain organ oxygen supply. |
| Typical Users | Children with asthma, elderly with chronic bronchitis, patients with acute respiratory infections. | Patients with COPD, heart failure, severe pulmonary fibrosis, or those requiring long-term home oxygen therapy. |
| One-Sentence Difference | Treats the "passage": Relieves airway constriction, reduces inflammation, and thins mucus. | Supplies the "fuel": Increases blood oxygen levels to sustain vital organ functions. |
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