LTOT
Medical abbreviation · Respiratory
| Stands for | Long-term oxygen therapy |
|---|---|
| Categories | Medical |
LTOT stands for Long-term oxygen therapy, a respiratory abbreviation.
Home oxygen used for at least 15 hours a day, and ideally continuously, in patients with chronic lung disease and severe resting hypoxemia. It is the only COPD therapy besides smoking cessation shown to improve survival in that group.
Example: Resting PaO2 53 mmHg on two occasions: LTOT at 2 L/min for at least 15 hours daily.
Usage notes
Survival benefit was shown in the NOTT (1980) and British MRC (1981) trials for patients with a resting PaO2 of 55 mmHg or less (SpO2 88 percent or less). The LOTT trial (2016) found no benefit for moderate resting or exercise-induced desaturation. Smoking while using oxygen causes serious facial burns and house fires, so patients are counseled carefully.
Related abbreviations
More respiratory abbreviations
- IPF – Idiopathic pulmonary fibrosis
- LABA – Long-acting beta2-agonist
- LAMA – Long-acting muscarinic antagonist
- LLL – Left lower lobe
- LPM – Liters per minute
- LRTI – Lower respiratory tract infection
- LUL – Left upper lobe
- MART – Maintenance and reliever therapy
- MV – Mechanical ventilation
- NC – Nasal cannula
- NIPPV – Noninvasive positive pressure ventilation
- NIV – Noninvasive ventilation
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This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.