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Pneumothorax (Air Accumulation between the Chest and Lung) in Dogs

Occurrence: rarer
Location of illness: Chest

Author: Dr. med. vet. Gisa Löwe | Last modified: 06.11.2025

Pneumothorax in dogs is a medical condition in which air accumulates in the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing., the space between the lung and the chest wall, which can lead to lung collapse and impair the dog’s breathing.

The most important facts at a glance

Pneumothorax in dogs occurs when air enters the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing., preventing the lungs from fully expanding. This can be caused by traumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., spontaneous causes such as pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. emphysemaEmphysema is a chronic lung disease characterized by over-expansion of the air spaces distal to the terminal bronchioles, accompanied by destruction of the alveolar walls. This leads to breathing difficulties and reduced oxygen uptake., or rarely by medical procedures. Symptoms include increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. and heart rate, shortness of breath, and in rare cases, bluish mucous membranes. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. begins with a clinical examination and X-rays to confirm air accumulation. ThoracocentesisThoracocentesis is a medical procedure in which fluid or air is removed from the chest using a needle or catheter. This may be necessary to relieve shortness of breath in dogs and cats caused by fluid accumulation or air in the chest. can be used both diagnostically and therapeutically. Treatment varies depending on the severity and cause, from monitoring and oxygen administration to surgical interventions. The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. depends on the cause and severity of the disease. Traumatic cases often have a good prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop., while spontaneous cases are more variable. Preventive measures are difficult but include avoiding injuries and regular veterinary check-ups in dogs with lung diseases. Research focuses on genetic predispositions, more effective diagnostic methods, and minimally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. treatments to accelerate recovery. In addition, new drugs are being developed to support lung healing and protocols for long-term monitoring to improve the quality of life of affected dogs.

Causes

The pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing. is the narrow space between the inner lining of the chest wall and the outer lining of the lung. Normally, this space contains a small amount of fluid that allows the lungs to move smoothly during breathing. A pneumothorax occurs when air enters this space, preventing the lung from fully expanding. This can lead to a partial or complete collapse of the affected lung.

A pneumothorax can be triggered by various causes. A common cause is traumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., such as can occur in car accidents, falls, or animal fights. Such injuries can damage the chest wall or the lung itself, allowing air to enter the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing..

Another cause can be spontaneous pneumothorax, which occurs without external influence. This often happens due to lung diseases such as pulmonaryPulmonary refers to the lungs or the respiratory system. Pulmonary diseases in dogs and cats include conditions such as Pneumonia, asthma, and pulmonary hypertension. emphysemaEmphysema is a chronic lung disease characterized by over-expansion of the air spaces distal to the terminal bronchioles, accompanied by destruction of the alveolar walls. This leads to breathing difficulties and reduced oxygen uptake., in which small blisters in the lung burst and release air into the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing.. In addition, tumors or infections that weaken the lung structure can lead to a spontaneous pneumothorax.

In rare cases, a pneumothorax can also be iatrogenicIatrogenic refers to conditions or diseases that arise as a direct result of medical treatments or interventions. Examples of iatrogenic problems in dogs and cats can include medication side effects or post-operative complications., i.e., caused by medical interventions. This can happen during surgical procedures or diagnostic procedures if the lung or pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing. is accidentally injured.

Symptoms

Very common symptoms:

Common symptoms:

Cough

Rare symptoms:

Bluish Mucous Membranes (Cyanosis)

The symptoms of pneumothorax in dogs can vary, depending on the extent of lung collapse and the underlying cause. Common symptoms include shortness of breath, rapid and shallow breathing, and an increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate. The dog may show signs of discomfort and have difficulty moving or playing.

In severe cases, the dog may show signs of cyanosisCyanosis refers to a bluish discoloration of the skin and mucous membranes, caused by an inadequate oxygen supply to the blood. It can be a sign of heart, lung, or blood diseases., meaning that the gums and mucous membranes are bluish in color due to lack of oxygen. Some dogs may also show signs of anxiety or panic as they have difficulty breathing.

Another possible symptom is reduced joy of movement or lethargy. The dog may also develop a Cough, especially if the pneumothorax is caused by an underlying lung disease.

Diagnosis

The diagnosis of pneumothorax in dogs begins with a thorough clinical examination by a veterinarian. The veterinarian will observe the dog’s breathing and look for signs of respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress. He will also listen to the chest to check for abnormal breathing sounds that could indicate a pneumothorax.

Chest X-rays are an important diagnostic tool to confirm a pneumothorax. The air in the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing. can be visualized on the X-rays, and the images can also help assess the extent of lung collapse.

In some cases, a thoracocentesisThoracocentesis is a medical procedure in which fluid or air is removed from the chest using a needle or catheter. This may be necessary to relieve shortness of breath in dogs and cats caused by fluid accumulation or air in the chest. may be performed, in which a needle is inserted into the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing. to remove air or fluid. This can not only help with the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients., but can also be used as a therapeutic measure to remove air and reduce pressure in the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing..

Further diagnostic tests may be necessary to determine the underlying cause of the pneumothorax. These may include blood tests, ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow., or CT scans, especially if a lung disease or tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. is suspected.

Therapy

The treatment of pneumothorax in dogs depends on the severity of the condition and the underlying cause. In mild cases, it may be sufficient to monitor the dog and provide oxygen to facilitate breathing while the air in the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing. is gradually absorbed.

In more severe cases, active removal of air from the pleural spaceThe pleural space is the narrow space between the two pleural layers that line the lungs and the inner chest wall. It contains a small amount of fluid that acts as a lubricant to allow the lungs to move smoothly during breathing. may be necessary. This can be achieved by thoracocentesisThoracocentesis is a medical procedure in which fluid or air is removed from the chest using a needle or catheter. This may be necessary to relieve shortness of breath in dogs and cats caused by fluid accumulation or air in the chest. or the insertion of a chest tube to continuously drain the air and correct the lung collapse.

If the pneumothorax was caused by traumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., surgical intervention may be necessary to repair damage to the chest wall or lung. In the case of a spontaneous pneumothorax caused by an underlying lung disease, this disease must also be treated to prevent recurrence.

In all cases, it is important to carefully monitor the dog during the recovery phase and provide a calm environment to avoid stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. and additional strain on breathing.

Prognosis and follow-up care

The prognosis for dogs with pneumothorax depends on several factors, including the severity of the condition, the underlying cause, and the speed with which treatment is given. In cases of traumatic pneumothorax without severe concomitant injuries, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is generally favorable, especially if treatment is initiated quickly.

In the case of a spontaneous pneumothorax caused by an underlying lung disease, the prognosis may be more variable and depends on the severity of the underlying disease and the response to treatment. Some dogs may recover completely, while others may have long-term breathing problems.

In cases where the pneumothorax is caused by a tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. or severe lung disease, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. may be more guarded, especially if the underlying disease cannot be completely cured.

Prevention

PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. of pneumothorax can be difficult, as many of the underlying causes are unpredictable. Nevertheless, there are some measures that can be taken to minimize the risk.

In dogs that are prone to trauma, such as those living in busy urban areas or frequently roaming uncontrolled, it may be helpful to take steps to avoid injury. This includes keeping the dog on a leash in unsafe areas and ensuring that the dog plays in a safe, fenced-in area.

For dogs with known lung diseases, it is important to have regular veterinary examinations to monitor lung health and detect potential problems early. Timely treatment of respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. diseases can help reduce the risk of spontaneous pneumothorax.

Outlook on current research

Current research on pneumothorax in dogs focuses on various aspects, including causes, diagnostic procedures, and treatment options. Scientists are currently investigating the genetic predispositions that may make certain dog breeds more susceptible to spontaneous pneumothorax. These genetic studies could help develop better preventive measures in the future to minimize the risk in at-risk dogs.

Another area of research focuses on the best diagnostic methods for pneumothorax. Currently, X-rays are the most common means of diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients., but newer imaging techniques such as computed tomography (CT)Computed tomography (CT) is an imaging technique that uses X-rays and computer technology to create cross-sectional images of the body. It enables a detailed view of bones, organs, and other structures and is used for the diagnosis of injuries, diseases, and for planning medical interventions. and magnetic resonance imaging (MRI)Magnetic resonance imaging is an imaging technique that uses strong magnetic fields and radio waves to create detailed images of the inside of the body. It is used in veterinary medicine to diagnose diseases of the brain, spine, and other organs. are also being investigated to assess their effectiveness and accuracy. These advanced technologies could enable more accurate and faster diagnosis in the future.

Regarding the treatment of pneumothorax, intensive research is being conducted on minimally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. surgical techniques that are less traumatic for the dog and allow for faster recovery. Thoracoscopic procedures, in which small incisions are made to insert surgical instruments and cameras into the chest cavity, are a promising area. These techniques could be particularly beneficial in complicated cases requiring surgical intervention.

In addition, scientists are working on developing new drugs that support lung healing after pneumothorax. This research includes the study of drugs that have anti-inflammatory properties and promote lung healing, as well as substances that minimize the formation of scar tissue, which could impair lung function.

Research on long-term monitoring and follow-up care of dogs that have suffered a pneumothorax is also an important area. Researchers are trying to develop protocols that improve the quality of life and long-term lung function of these dogs. This may include the development of special rehabilitation programs that include breathing techniques and exercise therapies.

Finally, the veterinary medical community is also investigating how environmental factors and lifestyle affect the risk and recovery of pneumothorax in dogs. Studies examining the effects of air quality, nutrition, and physical activity on lung function and the overall health risk of pneumothorax could lead to preventive measures in the long term.

Frequently asked questions (FAQs)

What is Pneumothorax in Dogs? Pneumothorax in dogs is a condition in which air enters the space between the lung and the chest wall. This can lead to a partial or complete collapse of the lung, which makes breathing difficult and can be potentially life-threatening.
What symptoms does a dog with pneumothorax show? Symptoms of pneumothorax include shortness of breath, rapid breathing, Cough, Restlessness, Pallor of the mucous membranes, and in severe cases, the dog may collapse. These symptoms require immediate veterinary attention.
What causes pneumothorax in dogs? Pneumothorax can be caused by traumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., such as a car accident or a fall. It can also occur spontaneously, without any identifiable cause, which is referred to as spontaneous pneumothorax. In rare cases, lung diseases or tumors can also cause pneumothorax.
How is pneumothorax diagnosed? The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of pneumothorax is usually made by physical examination and imaging procedures such as chest X-rays. In some cases, ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. or CT scans may also be necessary to confirm the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and determine the extent of air accumulation.
How is pneumothorax treated in dogs? The treatment of pneumothorax depends on the severity of the condition. In mild cases, it may be sufficient to monitor the dog and allow it to rest. In more severe cases, oxygen therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions., aspiration of air from the chest cavity, or surgical intervention may be necessary.
Can a dog fully recover from pneumothorax? Many dogs can fully recover from pneumothorax with appropriate treatment, especially if the cause of the pneumothorax is resolved. However, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. depends on the severity of the condition and the underlying cause.
How can I reduce the risk of pneumothorax in my dog? While some causes of pneumothorax, such as traumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., can be minimized by taking precautions such as wearing a seat belt in the car, spontaneous pneumothoraxes are more difficult to prevent. Regular veterinary check-ups can help detect potential problems early.
Are certain dog breeds more prone to pneumothorax? Some studies suggest that certain breeds, such as Siberian Huskies and other larger breeds, may be more prone to spontaneous pneumothoraxes. However, research in this area is not yet conclusive.
How long does recovery take after pneumothorax? The recovery time after pneumothorax can vary, depending on the severity of the case and the treatment performed. Typically, dogs can fully recover within a few weeks to months, provided there are no complications.
What should I do if I suspect my dog has pneumothorax? If you suspect your dog has pneumothorax, you should seek veterinary attention immediately. A quick diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment are crucial to avoid complications and improve the chances of recovery.