Dyspnea in Dogs

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Dyspnea (Trouble Breathing) in Dogs

By: PetPlace Veterinarians

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Section: Causes

Other Causes

Bronchopulmonary dysplasia, which is abnormal development of adult cells

Acidosis

Anemia, hypoxemia or hemoglobin abnormality

Neurologic (brain, spinal cord) lesions that alter ventilation

Neuromuscular weakness or disease

Rupture or paralysis of the diaphragm, including diaphragmatic hernia

Flail chest or rib fractures

Severe ascites or abdominal space occupying lesion

Drugs, such as steroids that may cause panting, phenobarbital, preservatives in injectables

Lung Disorders

Pneumonia

Pulmonary edema from electrocution, airway obstruction, seizures, smoke inhalation, aspiration of gastric contents into the lungs, pulmonary embolism (the sudden blocking of an artery by a clot or foreign material), heartworm thrombus, drug reaction, uremia (an excess of waste products in the blood when the kidneys

are not working properly) and DIC (disseminated intravascular coagulation)

Pulmonary hemorrhage (heavy bleeding into the lung) from trauma; rodenticide coagulopathy, which is a disorder of blood coagulation due to ingestion of rodent poison; DIC; disseminated pulmonary neoplasia (tumor)

Pulmonary fibrosis (scarring of lung tissue)

Tumors and Mass Lesions

Nasal tumor

Pharyngeal/tonsillar tumor or polyps

Laryngeal tumor or polyp

Chondromatous hematoma of the trachea

Tracheal adenocarcinoma (cancer)

Lymphoma (cancer of lymphoid tissue) in the respiratory tree, lung, mediastinum or lymphatics

Thymoma (disease or cancer of the thymus)

Primary lung tumors (carcinomas)

Metastatic (pertaining to the transfer of disease from one organ or part to another not directly related to it) lung tumors

Cardiac or heartbase tumors

Cardiac and Vascular Diseases

Left bronchial compression from left atrial dilatation

Left-sided congestive heart failure (pulmonary edema and/or pleural effusion)

Heartworm disease (canine)

Pericardial disease (disease of the sac enclosing the heart and the roots of the great vessels)

Heartbase tumors

Pulmonary thromboembolism (blood clot in the lungs)

Air embolism (e.g. with IV lines or urinary negative contrast studies)

Diseases of the Mediastinum and of the Pleural Space

Mediastinal mass, which is a mass in the tissues and organs separating the two lungs, including lymphoma, thymoma and teratoma

Thymic hemorrhage

Hilar lymphadenopathy (disease of the lymph nodes) with bronchial compression. These include mycosis (any disease caused by fungi), granulomatous lung diseases, lymphoma and other neoplasms.

Pleural effusion caused by:

- Congestive heart failure (CHF)
- Hydrothorax (fluid in the pleural cavity that encases the lungs and thoracic cavity)
- Chylothorax (milky fluid in the chest)
- Hemothorax (collection of blood in the chest)
- Pyothorax (accumulation of pus in the chest)
- Pneumothorax (entry of air into the chest)
- Metastatic neoplasia (tumor)
- Pleuropneumonia (pneumonia accompanied by inflammation of the pleura)
- Pulmonary embolism
- Diffuse lymphatic dysplasia
- Protein losing enteropathy (disease of the intestine)
- Idiopathic pleuritis
- Idiopathic pleural effusion

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1 Laryngeal Paresis and Paralysis
In laryngeal paresis/paralysis the larynx fails to open properly during inhaling, and this leads to airway obstruction. Located at the entrance to the windpipe and covered by a movable flap called the...
Read More
2 Pleural Effusion in Dogs
Pleural effusion is an abnormal accumulation of fluid in the pleural space, which is the cavity between the lungs and the thoracic wall. Normally, some fluid is present in the pleural space to lubricate...
Read More
3 Diaphragmatic Hernia in Dogs
The diaphragm is the muscle that separates the abdominal organs from the heart and lungs, and a defect in the diaphragm allows abdominal organs such as the liver, stomach and intestines to enter the chest...
Read More
4 Pneumothorax in Dogs
Pneumothorax is the abnormal presence of air within the chest cavity, which restricts the lungs from inflating normally during inhalation. Air is normally confined to spaces within the lungs.
Read More

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1 Diaphragmatic Hernia in Dogs
The diaphragm is the muscle that separates the abdominal organs from the heart and lungs, and a defect in the diaphragm allows abdominal organs such as the liver, stomach and intestines to enter the chest...
Read More
2 Laryngeal Paresis and Paralysis
In laryngeal paresis/paralysis the larynx fails to open properly during inhaling, and this leads to airway obstruction. Located at the entrance to the windpipe and covered by a movable flap called the...
Read More
3 Pleural Effusion in Dogs
Pleural effusion is an abnormal accumulation of fluid in the pleural space, which is the cavity between the lungs and the thoracic wall. Normally, some fluid is present in the pleural space to lubricate...
Read More
4 Pneumothorax in Dogs
Pneumothorax is the abnormal presence of air within the chest cavity, which restricts the lungs from inflating normally during inhalation. Air is normally confined to spaces within the lungs.
Read More

Dyspnea in Dogs

Dyspnea (Trouble Breathing) in Dogs

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