Advanced-Stage Emphysema

Why Is Pulmonary Rehabilitation Important?

Pulmonary rehabilitation is one of the key components of advanced emphysema treatment. The program may include:

• Endurance exercises
• Muscle strengthening
• Breathing techniques
• Physical activity training
• Nutritional assessment
• Disease education

Rehabilitation does not rebuild damaged alveoli. However, it can support exercise capacity and reduce the impact of shortness of breath on daily life. It can also be an important part of patient evaluation before advanced bronchoscopic or surgical treatments.

Oxygen Therapy in Advanced Emphysema

Not every patient with advanced emphysema needs long-term oxygen therapy. The need for oxygen is evaluated based on objective measurements taken:

• At rest
• During exercise
• During sleep

and, when necessary, on arterial blood gas results. Oxygen therapy does not reverse emphysema or directly reduce hyperinflation.

What Is Lung Volume Reduction Treatment?

In advanced emphysema, some areas of the lung may be severely damaged and overinflated. These areas can take up a large amount of space in the chest cavity while contributing little to gas exchange. The goal of volume reduction treatment is to reduce the volume these areas occupy. In this way, in selected patients:

• Air trapping can be reduced
• The mechanical position of the diaphragm can be improved
• Better-functioning lung tissue can expand
• The efficiency of the respiratory muscles can be increased
• Shortness of breath can be reduced
• Exercise capacity can be increased

Volume reduction can be performed using surgical or bronchoscopic methods.

What Is Lung Volume Reduction Surgery?

In lung volume reduction surgery, the most severely damaged areas of the lung that contribute most to hyperinflation are surgically removed. The goal is not to preserve as much lung tissue as possible. By removing areas that have very little function but take up excess volume in the chest, the aim is to allow the remaining lung to work under more favorable mechanical conditions. In selected patients:

• Hyperinflation may decrease
• Diaphragm function may improve
• Shortness of breath may decrease
• Exercise capacity may increase
• Quality of life may improve

Who Is a Candidate for Lung Volume Reduction Surgery?

Patient selection takes the following into account together:

• Severity of emphysema
• Distribution of emphysema
• Whether it is heterogeneous or homogeneous
• FEV1
• Residual volume
• Total lung capacity
• DLCO
• Exercise capacity
• Results of pulmonary rehabilitation
• Smoking
• Heart disease
• Pulmonary hypertension
• Nutritional status
• Overall surgical risk

Not every patient with advanced emphysema is a candidate for lung volume reduction surgery.

What Are the Risks of Lung Volume Reduction Surgery?

Possible complications include:

• Prolonged air leak
• Pneumothorax
• Pneumonia
• Bleeding
• Respiratory failure
• Heart rhythm disorders
• Cardiovascular complications
• Blood clots
• Need for intensive care
• Reoperation
• Death

The expected benefit and the risk of the procedure should be weighed together for each individual patient.

What Is Bronchoscopic Lung Volume Reduction?

Bronchoscopic lung volume reduction refers to methods that aim to reduce the volume of selected areas of the lung using a bronchoscope, without surgically opening the chest. Among these methods, the strongest scientific evidence exists for one-way endobronchial valves. Other methods that have been studied include:

• Bronchoscopic coil systems
• Thermal vapor ablation
• Biological or chemical methods
• New airway implants

The level of evidence, availability, and routine clinical use of these methods are not the same.

What Is an Endobronchial Valve?

An endobronchial valve is a small one-way device placed via bronchoscope in the airways leading to a selected target lobe. The valve:

• Allows air to leave the target lobe
• Reduces or prevents new air from entering
• Aims to reduce the volume of the target lobe

When the target lobe shrinks, the better-preserved lung tissue and the diaphragm can work under more favorable mechanical conditions. The valve does not heal damaged alveoli.

Who Is a Candidate for Endobronchial Valves?

Patient selection may take into account:

• Advanced emphysema
• Marked hyperinflation
• Persistent symptoms despite optimal treatment
• A suitable target lobe
• Distribution of emphysema between the lobes
• Fissure integrity
• Collateral ventilation
• Pulmonary function
• Exercise capacity
• Smoking
• Infection
• Bronchiectasis
• Amount of sputum
• Heart disease
• Pulmonary hypertension

A diagnosis of advanced emphysema alone does not mean that a patient is suitable for valve treatment.

What Is Collateral Ventilation?

Collateral ventilation is the passage of air from neighboring lung lobes into the target lobe through alternative connections outside the normal bronchial pathways. Even if an endobronchial valve blocks the airways leading to the target lobe, air can continue to reach the target lobe if significant collateral ventilation is present. In this case, the target lobe may not shrink sufficiently. For this reason, the absence of significant collateral ventilation is one of the important criteria for the success of valve treatment.

Why Is Fissure Integrity Important?

The anatomical structures that separate the lobes of the lung from one another are called fissures. Complete fissures can limit the passage of air between lobes. When fissures are incomplete, the likelihood of collateral ventilation may increase. For this reason, fissure integrity may be assessed on CT when planning endobronchial valve treatment. In patients who require it, collateral ventilation can also be measured separately during bronchoscopy.

What Happens After Endobronchial Valve Placement?

If the valve successfully isolates the target lobe:

• Air in the target area can escape
• New air entry may decrease
• The target lobe may shrink
• Partial or complete lobar atelectasis may develop
• Neighboring areas of the lung may expand
• The mechanical position of the diaphragm may improve

The extent of these changes and the clinical benefit to the patient vary from person to person.

What Are the Potential Benefits of Endobronchial Valves?

In appropriately selected patients, the following may be seen:

• Reduced hyperinflation
• Lower residual volume
• Improvement in FEV1
• Less shortness of breath
• Increased walking capacity
• Increased exercise tolerance
• Improved quality of life

The same level of response is not expected in every patient.

What Are the Risks of Endobronchial Valves?

One of the most important early complications is pneumothorax. As the target lobe shrinks, the expansion of other areas of the lung can cause an air leak and pneumothorax in some patients. Other possible complications include:

• COPD exacerbation
• Pneumonia
• Bleeding
• Increased sputum
• Valve migration
• Valve blockage
• Tissue growth around the valve
• Insufficient shrinkage of the target lobe
• Respiratory failure
• Need for additional bronchoscopy
• Need to remove the valves

Hospital monitoring may be required after the procedure because of the risk of pneumothorax.

Can Endobronchial Valves Be Removed?

When necessary, endobronchial valves can usually be removed bronchoscopically. Reasons for removal may include:

• Lack of clinical benefit
• Infection
• Valve migration
• Airway reaction
• Other complications

The fact that the valve can be removed does not mean that the procedure is completely risk-free or that all of its effects are reversible.

Endobronchial Valves or Lung Volume Reduction Surgery?

The main goal of both treatments is to reduce hyperinflation, but they achieve it in different ways. Endobronchial valves:

• Are placed bronchoscopically
• Do not remove lung tissue
• Require a suitable target lobe
• Are affected by collateral ventilation
• Can be removed if necessary
• Carry a significant risk of pneumothorax

Lung volume reduction surgery:

• Surgically removes damaged lung tissue
• Is not affected by collateral ventilation as much as valves are
• Involves a greater surgical burden
• May require a longer recovery period

It cannot be said that one method is better than the other for every patient with advanced emphysema. The choice of treatment is based on the patient's anatomical and physiological characteristics.

Other Bronchoscopic Treatments

In addition to endobronchial valves, other bronchoscopic volume reduction methods have also been studied. These include:

• Coil systems
• Thermal vapor ablation
• Biological volume reduction
• Chemical methods
• Various airway implants

The level of scientific evidence, availability, and regulatory status of these methods differ from one another. It should not be assumed that a method studied in scientific research is a standard treatment in routine clinical practice.

Is the "COPD Balloon" a Treatment for Advanced Emphysema?

The bronchoscopic method known as the "COPD balloon" does not have the same mechanism as lung volume reduction methods. This approach is mainly directed at the airways. The COPD balloon:

• Does not remove damaged emphysematous tissue
• Does not rebuild alveoli
• Does not shrink the target lobe the way an endobronchial valve does
• Is not a substitute for lung volume reduction surgery

For this reason, an emphysema-specific evaluation is important in patients whose shortness of breath is mainly caused by advanced emphysema and hyperinflation.

Lung Transplantation in Advanced Emphysema

Lung transplantation may be considered in selected patients with very advanced, irreversible emphysema. Situations that may be important in the evaluation generally include:

• Persistent severe symptoms despite optimal medical treatment
• Severe loss of function despite pulmonary rehabilitation
• No suitable or adequate volume reduction option
• Advanced respiratory failure
• Significant oxygen requirement
• Elevated carbon dioxide levels
• Poor disease-related prognosis

However, the decision for transplantation is not based solely on the severity of the lung disease. Many factors are evaluated together, such as age, the condition of other organs, infections, cancer history, nutrition, muscle status, frailty, and adherence to treatment.

Risk of Pneumothorax in Advanced Emphysema

The risk of pneumothorax may be increased in some patients, especially those with bullous or paraseptal emphysema. Pneumothorax is the partial or complete collapse of the lung caused by air entering the pleural space. Symptoms may include:

• Sudden-onset, one-sided chest pain
• Sudden shortness of breath
• Rapid breathing
• A drop in oxygen levels

This condition requires emergency evaluation.

How Is Advanced Emphysema Monitored?

The follow-up plan may vary depending on the severity of the disease and the treatments received. At follow-up visits, the following may be assessed:

• Shortness of breath
• Exercise capacity
• Exacerbations
• Spirometry
• Lung volumes
• Oxygen levels
• Weight and muscle status
• Smoking
• Inhaler therapy
• Coexisting conditions
• Imaging when needed

Patients who have undergone advanced bronchoscopic or surgical treatment require procedure-specific follow-up.

When Is Emergency Evaluation Needed in Advanced Emphysema?

Emergency medical evaluation may be needed in the following situations:

• Sudden, severe shortness of breath
• New one-sided chest pain
• Coughing up blood
• Significantly low oxygen levels
• Bluish discoloration of the lips or face
• Confusion
• Excessive sleepiness
• Worsening breathing together with high fever
• Sudden palpitations or fainting
• Sudden shortness of breath together with swelling in one leg

These symptoms may be related to pneumothorax, pneumonia, pulmonary embolism, a severe COPD exacerbation, or other acute illnesses. They should not be accepted as a normal part of chronic emphysema.