Which of the following is used for improving long term prognosis in COPD with resting hypoxemia:March 2011
**Core Concept**
COPD with resting hypoxemia is a condition characterized by chronic obstructive pulmonary disease (COPD) accompanied by low oxygen levels in the blood at rest. Improving long-term prognosis in this condition involves addressing the underlying pathophysiology, which includes chronic inflammation, airway obstruction, and impaired gas exchange.
**Why the Correct Answer is Right**
Long-term oxygen therapy (LTOT) is the treatment of choice for improving long-term prognosis in COPD patients with resting hypoxemia. This is because LTOT helps to normalize oxygen levels in the blood, thereby reducing the workload on the heart and improving exercise tolerance. Additionally, LTOT has been shown to decrease mortality and reduce the risk of complications such as pulmonary hypertension and right heart failure.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because bronchodilators, while effective in managing symptoms of COPD, do not directly address the issue of resting hypoxemia.
* **Option B:** This option is incorrect because pulmonary rehabilitation, while beneficial for improving exercise tolerance and quality of life, does not directly improve long-term prognosis in COPD patients with resting hypoxemia.
* **Option D:** This option is incorrect because smoking cessation, although essential for preventing further lung damage, does not directly address the issue of resting hypoxemia in COPD patients.
**Clinical Pearl / High-Yield Fact**
LTOT should be initiated in COPD patients with resting hypoxemia if the arterial oxygen tension (PaO2) is less than 55 mmHg. The goal of LTOT is to maintain an oxygen saturation of at least 88% or an arterial oxygen tension of at least 60 mmHg.
**Correct Answer:** C. Long-term oxygen therapy (LTOT)