What Is the Pathophysiology of COPD?

COPD’s effect on the lungs

COPD is an umbrella term for severalchronic lung diseases。The two main COPD conditions arechronic bronchitisandemphysema。These diseases affect different parts of the lungs, but both lead to difficulty breathing.

To understand COPD’s pathophysiology, it’s important to understandthe structure of the lungs。

When you inhale, air moves down yourtracheaand then through two tubes called bronchi. The bronchi branch out into smaller tubes called bronchioles. At the ends of the bronchioles are little air sacs called alveoli. At the end of the alveoli are capillaries, which are tiny blood vessels.

Oxygen moves from the lungs to the bloodstream through these capillaries. In exchange, carbon dioxide moves from the blood into the capillaries and then into the lungs before it’s exhaled.

Emphysema is a disease of the alveoli. The fibers that make up the walls of the alveoli become damaged. The damage makes them less elastic and unable to recoil when you exhale, making it hard to exhale carbon dioxide out of the lungs.

If the lung airways become inflamed, this results in bronchitis with subsequent mucus production. If the bronchitis persists, you can develop chronic bronchitis. You also can have temporary bouts ofacute bronchitis, but these episodes aren’t considered to be the same as COPD.

Causes of COPD

The main cause of COPD is tobaccosmoking。Breathing in smoke and its chemicals can injure the airways and air sacs. This leaves you vulnerable to COPD.

Exposure tosecondhand smoke, environmental chemicals, and even fumes from gas burned for cooking in poorly ventilated buildings can also lead to COPD.Discover more COPD triggers here.

Recognizing physical changes caused by COPD

Serious symptoms of COPDdon’t usually appear until the disease is moreadvanced。因为慢性阻塞性肺病影响到你的肺,你可能会发现哟urself short of breath after minor physical exertion.

If you find yourself breathing harder than usual after a common activity, such as climbing stairs, you should see a doctor.Tests focused on your degree of respiratory healthcan reveal conditions such as chronic bronchitis and emphysema.

One of the reasons breathing becomes more challenging is because the lungs produce more mucus and the bronchioles become inflamed and narrower as a result.

With more mucus in your airways, less oxygen is being inhaled. This means less oxygen reaches the capillaries for gas exchange in your lungs. Less carbon dioxide is also being exhaled.

Coughing to try to help release the mucus from the lungs is a common sign of COPD. If you notice thatyou’re producing more mucus and coughing moreto clear it, you should see a doctor.

Other signs of COPD progression

As COPD progresses, many other health complications can follow.

Besides coughing, you may notice yourselfwheezingwhen you breathe. The buildup of mucus and the narrowing of the bronchioles and alveoli may also causechest tightness。These aren’t normal symptoms of aging. If you experience them, see your doctor.

Less oxygen circulating throughout your body can leave you feeling light-headed or fatigued. Lack of energy can be a symptom of many conditions, and it’s an important detail to share with your doctor. It may help determine the seriousness of your condition.

In people with serious COPD,weight lossalso can occur as your body requires more and more energy to breathe.

COPD prevention

One of the easiest ways to prevent COPD is to never start smoking orstop as soon as you can。Even if you’ve smoked for many years, you can start to preserve your lung health the minute you stop smoking.

The longer you go without smoking, the greater your odds of avoiding COPD. This is true no matter what age you are when you quit.

It’s also important to haveregular checkupsand follow the advice of your doctor. There are no guarantees when it comes to COPD. However, you can take steps to maintain better lung function if you’re proactive about your health.