Tracheal collapse is a chronic disease involving the trachea (also called the windpipe) and the lower airway. This disease is progressive, meaning it gets worse over time. Although tracheal collapse is irreversible, there are treatments available to improve symptoms.
What Is Tracheal Collapse?
The trachea is a major part of the upper airway. It is a flexible tube-shaped structure that is surrounded by u-shaped rings of cartilage, making it appear somewhat accordion-like. The rings are attached to a membrane and help keep the trachea open, allowing the dog to breathe normally. If these cartilage rings become weak or worn, they may no longer be able to hold the trachea open. They flatten and collapse, shrinking the space through which air can pass. The tracheal collapse may or may not involve the lower airway, where smaller tubes (mainstem bronchi) carry air to the lungs.
Tracheal Collapse Risk Factors
Small dog breeds are most commonly affected by collapsing trachea, especially Pomeranians, Yorkshire Terriers, Chihuahuas, Maltese, and Papillons. Tracheal collapse may or may not be hereditary. It may be congenital (present at birth) or acquired (developed later, sometimes secondary to other diseases). Overweight or obese dogs have a higher risk of developing tracheal collapse. Exposure to cigarette smoke or other air pollution may worsen a collapsing trachea.
Signs of Collapsing Trachea in Dogs
Coughing is by far the most common signs of tracheal collapse in dogs. Dogs with tracheal collapse often experience the following signs:
- A cough that is harsh, dry, and unproductive (often sounds like goose honking)
- Coughing when pressure is put on the neck (especially by a collar or hands)
- Coughing and/or wheezing when excited
- Coughing when picked up
- Retching (looks like trying to vomit, but produces nothing)
- Noise when breathing (wheezing, etc.)
- Trouble breathing (increased effort)
- Exercise intolerance
- Blue-colored gums (often in conjunction with exercise or excitement)
- Episodes of fainting/loss of consciousness
Be sure to report these and any other signs of illness to your veterinarian. Waiting can only make the disease progress to the point where your dog's life is in danger. It's better to act early so you can give your dog some relief.
How Vets Diagnose Tracheal Collapse in Dogs
If you suspect your dog has a collapsing trachea, be sure to visit a veterinarian for an evaluation. Your vet will begin by asking several questions in order to get history about your dog and the signs you have noticed.
Next, your vet will perform a physical examination on your dog. Your vet may try to elicit a cough by putting a bit of pressure on the trachea. This is not an actual determination of the disease, but it can give your vet an idea of the type of a cough your dog is experiencing. In addition, it may be helpful to show your vet a video of your dog coughing, wheezing, or exhibiting other signs.
Your vet will most likely recommend radiographs (x-rays) of the chest to determine a diagnosis. This will provide a radiographic view of your dog's airway, heart, and lungs. Be aware that tracheal collapse may not show up on the x-rays, especially in minor cases. The x-rays may even reveal a completely different cause for your dog's symptoms. This is why it's an important first step to rule out obvious issues.
There is a good chance your vet will want to run some lab work to get a better idea of your dog's overall health. Lab tests like blood chemistry, complete blood count, and a urinalysis may reveal underlying conditions. These conditions may contribute to the tracheal collapse or can be unrelated. The lab results may point to another condition that is causing your dog's signs.
If your pet needs advanced diagnostic tests, your vet may not have the necessary equipment and may refer you to a specialist (typically a veterinary internist). The veterinary specialist may recommend one or more advanced tests.
- Endoscopy, during which a tube-like fiber optic camera is inserted into the trachea, allowing the veterinarian to see the inside of the trachea and take fluid samples for culture and analysis (all with your dog under anesthesia).
- Echocardiogram, an ultrasound of the heart that evaluates cardiac function
- Fluoroscopy, a moving x-ray that shows what occurs as your dog breathes in and out
Based on the outcome of the testing, your vet will hopefully be able to make a diagnosis. The next step is to begin treatment.
Medical Treatments for Collapsing Trachea
Tracheal collapse cannot be cured, but there are several ways to help your dog.
First, be sure to stop using neck collars on your dog, Switch to a harness that does not put any pressure on your dog's neck area.
Weight loss is important if your dog is overweight. Excess weight adversely affects the airway.
There are several medications that can help alleviate the symptoms of tracheal collapse. Cough suppressants are most commonly prescribed, such as hydrocodone. Sedatives may also be prescribed to reduce anxiety and keep your dog calm and relaxed. This will make your dog less likely to cough or have tracheal spasms.
Be sure not to use any over-the-counter medications unless specifically recommended by your vet. Use all medications according to your vet's instructions and do not change doses without consulting with your vet. Avoid so-called "home remedies or "natural remedies" unless your vet says they are safe to try. Unfortunately, some of these can actually make things worse.
Surgery for Collapsing Trachea
Medical management is effective in the majority of dogs. However, in severe cases, surgery might be the best option. Surgical treatment of tracheal collapse is a major procedure that must be performed by a veterinary surgeon, ideally one who is ACVS board-certified.
Surgery may involve the placement of special plastic rings around the trachea. Or, the surgeon may need to place a stent inside the trachea or lower airway. The stent is a mesh device that holds open the airway. In some cases, the stent can be placed by a veterinary internist (ideally ACVIM board-certified internist) via tracheobronchosopy.
Although there are several risks associated with airway surgery, many dogs recover well with proper medical care. In some cases, the stent or plastic rings may break or become displaced. This is why it's so important to follow your vet's recommendations and report any signs of illness. A post-operative hospital stay of one to two days is typical. Medical management is usually continued during the recovery period to decrease pain, swelling, coughing, and excitement.
As with most surgical procedures, the dog's activity must be restricted during the recovery period and follow-up visits to your vet or specialist will be necessary. After recovery, some dogs will continue to exhibit signs, especially coughing. Fortunately, these signs are usually much milder.
The good news is, with proper care, most dogs can live relatively normal lives despite tracheal collapse. As always, be sure to communicate with your vet, asking questions and providing updates on your dog's condition.