There are multiple definitions:

1. longterm [home-based] oxygen therapy(English)

   • applied in patients with chronic respiratory failure, provided they satisfy the relevant indication criteria. It is one of the methods which improve the survival rate of hypoxemic patients
   • AAT, ABT, BVR, COPD, CPPS, ETS, NCC, NIV, PDE4i, ICS, LABA, LVRS, COPD-S, LTOTD
   • Oxygen, Therapeutic approaches, Pulmonology
   • https://doi.org…507/bp.2013.039
   • https://doi.org….1111/crj.13250

2. long-term opioid therapy(English)

   • UDT
   • Therapeutic approaches, Pain
   • https://doi.org…m.2022.220360R1