Understanding Laryngeal Paralysis in Dogs

Laryngeal paralysis in dogs is a serious condition that affects the nerves controlling the voice box. It's a relatively common issue in older dogs, especially those with certain breeds such as Bulldogs and Pugs.

The condition occurs when the nerves that control the vocal cords become damaged or weakened, leading to impaired breathing and swallowing.

Symptoms can vary in severity and may include coughing, gagging, and difficulty breathing.

Laryngeal paralysis is a condition where the nerves that control the larynx, or voice box, are damaged or weakened. This can cause a range of symptoms, including hoarseness, breathiness, and difficulty speaking or swallowing.

The vocal cords, which are controlled by these nerves, may not move properly, leading to a change in voice quality. In some cases, the vocal cords may even collapse into the airway, making breathing more difficult.

Laryngeal paralysis can be caused by a variety of factors, including injury, infection, or neurological disorders.

Laryngeal paralysis in dogs is a complex condition with various causes, and in many cases, the exact cause remains unknown.

Idiopathic laryngeal paralysis, where the cause is unknown, is a common diagnosis, often resulting from a symptom of neuromuscular disease, such as Geriatric Onset Laryngeal Paralysis Polyneuropathy (GOLPP).

Some breeds, like Bouvier de Flandres, Siberian Huskies, Bull Terriers, and Dalmatians, have an increased risk for congenital laryngeal paralysis and often show signs of the condition when young.

Laryngeal paralysis can also be caused by tumors or lesions in the neck or chest, trauma to the throat, hormonal disorders such as hypothyroidism and Cushing's disease, and congenital issues.

Dogs with laryngeal paralysis may experience difficulty swallowing and breathing, frequent gagging, and an abnormal bark.

The most common causes of laryngeal paralysis include peripheral polyneuropathy (generalised nerve dysfunction), trauma to the recurrent laryngeal nerves, iatrogenic causes (resulting from medical treatment), tumors, and hormonal disturbances, such as poorly controlled hypothyroidism.

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Here are the common causes of laryngeal paralysis in dogs:

Laryngeal paralysis can be a serious condition in dogs, and it's essential to recognize the signs early on. Increased inspiratory noise, a loud rasping noise during breathing in, is often the first noticeable symptom.

Dogs with laryngeal paralysis may also exhibit coughing, which can be a sign of the partial obstruction in the airway. Weight loss can occur due to decreased appetite, as eating and drinking become more challenging.

Reduced exercise tolerance is another common sign, as dogs with laryngeal paralysis are more prone to overexertion and overheating. They may also experience collapse, which can be a life-threatening emergency.

A dog's ability to pant is impaired, making them less able to tolerate increased temperatures. Altered phonation, or changes in bark or meow sounds, can also be a sign of laryngeal paralysis.

Problems swallowing food and/or water, resulting in coughing and spluttering, can further exacerbate the condition. Sudden respiratory distress, particularly when subjected to a warm environment, is a critical sign that requires immediate veterinary attention.

Here are the common signs of laryngeal paralysis:

Laryngeal paralysis is a condition where the nerves that control the vocal cords are damaged, leading to weakness or paralysis of the vocal cords. This can cause a range of symptoms, including a weak or hoarse voice.

The vocal cords are two bands of muscle tissue located in the larynx, or voice box. They work together to produce sound when we speak or sing.

When the nerves that control the vocal cords are damaged, it can cause the vocal cords to become weak or paralyzed, leading to breathing difficulties and vocal changes. This can be a life-threatening condition, especially if it affects the ability to breathe or swallow.

The symptoms of laryngeal paralysis can vary depending on the severity of the condition and the affected nerves. Some people may experience a weak or hoarse voice, while others may have difficulty breathing or swallowing.

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Diagnosing laryngeal paralysis can be a multi-step process that involves a combination of clinical examination and diagnostic testing.

A full clinical examination, including neurological assessment, is important early in the investigation of this disease, and your veterinarian may suspect laryngeal paralysis based on the age and breed of the patient, the breathing pattern, and discussion of the history with the owner.

To definitively diagnose laryngeal paralysis, your veterinarian may sedate the dog to visualize its larynx and the functionality of the cartilage/muscles when they open and close. In a normal larynx, both sides of the larynx will open and close widely on one breath, but in a dog with laryngeal paralysis, the larynx will sit unmoving in a semi-open position.

Your veterinarian will likely recommend thorough diagnostic testing that includes a complete blood panel, thyroid testing, and neck and chest X-rays/radiographs. These tests can help identify other potential causes of coughs and determine if there are any side effects of laryngeal paralysis, such as aspiration pneumonia.

Here are some common diagnostic tests used to investigate laryngeal paralysis:

Diagnosis and investigation of laryngeal paralysis in dogs involve a thorough clinical examination, including neurological assessment, which is crucial early in the investigation of this disease.

A full clinical examination is essential to identify any underlying issues that may be contributing to the condition.

Your veterinarian may recommend a complete blood panel to check organ function and for signs of thyroid dysfunction.

Blood samples are a crucial part of the diagnostic process, helping to rule out other potential causes of the condition.

X-rays are also commonly used to check for signs of pneumonia, which can occur when food or water passes into the lungs, as well as megaoesophagus or tumours that may alter the prognosis.

An ultrasound scan of the neck can sometimes be helpful in diagnosing laryngeal paralysis.

Electro-myogram (EMG), a specialized electrical nerve and muscle test, may be recommended in cases where a generalized polyneuropathy is suspected.

The following diagnostic tests are commonly used to investigate laryngeal paralysis:

Laryngeal paralysis in dogs can be caused by a variety of factors, many of which are not yet fully understood. In many cases, the cause of the condition is unknown, a phenomenon known as idiopathic laryngeal paralysis.

Some breeds, such as Bouvier de Flandres, Siberian Huskies, Bull Terriers, and Dalmatians, have an increased risk of congenital laryngeal paralysis, which can manifest at a young age. These dogs may experience difficulty swallowing and breathing, and their bark may sound abnormal.

Idiopathic laryngeal paralysis can sometimes be a symptom of a larger neurologic condition called Geriatric Onset Laryngeal Paralysis Polyneuropathy (GOLPP). This condition typically affects dogs over 10 years old and can lead to other symptoms, including rear leg weakness and megaesophagus.

Tumors or lesions in the neck or chest, trauma to the throat, hormonal disorders such as hypothyroidism and Cushing's disease, and congenital issues are all known to cause laryngeal paralysis in dogs.

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The most common causes of laryngeal paralysis include peripheral polyneuropathy (generalised nerve dysfunction), trauma to the recurrent laryngeal nerves, iatrogenic causes (resulting from medical treatment), tumors affecting the neck or front of the chest, and hormonal disturbances, particularly poorly controlled hypothyroidism.

Here are the most common causes of laryngeal paralysis:

If your dog has severe laryngeal paralysis or the congenital form of the condition, surgery can be very effective. Arytenoid lateralization by tie-back can be done to surgically tie back the collapsed cartilage on one side of your pup's throat in order to prevent obstruction when breathing.

The most effective and commonly performed surgical treatment for laryngeal paralysis is a 'Tieback' or Unilateral Arytenoid Lateralisation (UAL). This involves permanently fixing one of the vocal cords in an open position.

In some cases, surgery is the only effective treatment option, so it's essential to discuss this with your vet. If your dog's condition is detected in the early stages, your vet may want to try treatment alternatives such as anti-inflammatory drugs, sedatives, antibiotics, or doxepin to help reduce the severity of your dog's breathing difficulties.

This surgery is known to be very successful in many cases and can greatly improve the dog's quality of life. By permanently fixing one of the vocal cords, UAL can help prevent obstruction and make breathing easier for your dog.

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Recovery from laryngeal tie-back surgery is similar to other anesthetic procedures, with exercise restricted for several weeks.

Dogs that have had the procedure should not be allowed to swim for the rest of their lives to avoid the risk of breathing in water. Coughing or gagging is initially normal while eating or drinking, but tends to resolve over time.

The pet parent should be aware of the symptoms of food/water aspiration, which is the most common complication of this surgery. Approximately 25 percent of dogs will have aspiration pneumonia at some point after surgery.

To help manage the condition, there are several changes you can make. Never use a neck collar for restraint or to lead walk your dog – a harness should be used.

Avoid dry, dusty food which may be more prone to being breathed in. Avoid heat stress – patients that have had tieback surgery still have a degree of compromise to their upper airway and should never be allowed to become stressed by heat.

Monitor your pet for signs of sickness or attempts to cough that may indicate pneumonia – consult a veterinary surgeon if you are at all concerned.

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After your pet undergoes treatment for laryngeal paralysis, you can expect a significant improvement in their airway and quality of life, with approximately 90-95% of patients experiencing a notable improvement.

The laryngeal tieback procedure can greatly improve air flow in patients suffering paralysis of both sides of the larynx, but it's essential to be aware of the potential complications, such as hemorrhage, airway swelling, and infection.

A crucial aspect of post-operative care is to avoid dry, dusty food, as it may be more prone to being aspirated, and never use a neck collar for restraint or to lead walk your dog – a harness should be used instead.

To monitor your pet's recovery, watch for signs of malaise or attempts to cough that may indicate pneumonia, and consult a veterinary surgeon if you're at all concerned.

If you decide not to have the procedure performed on your animal, it's essential to monitor them closely for signs of deterioration in function or aspiration pneumonia. These conditions can be life-threatening if left untreated.

Animals not receiving surgery must avoid heat stress at all costs. This means taking extra precautions to keep them cool, especially during hot weather.

Unfortunately, once diagnosed, the condition is usually progressive, and there will always be a degree of anxiety when considering cases with some remaining function of the recurrent laryngeal nerves.

Approximately 90-95% of patients that undergo a 'tieback' procedure for laryngeal paralysis have a significantly improved airway and quality of life.

The procedure can greatly improve air flow in patients suffering paralysis of both sides of the larynx by permanently holding one of the vocal cords open.

However, complications can occur in the minority of cases, including haemorrhage, airway swelling, infection, aspiration pneumonia, seroma formation, and suture failure or cartilage fracture.

These complications are usually rare, but it's essential to be aware of them before making a decision about surgery.

The decision to operate is usually based on assessment of the risks and benefits associated with surgery and the potential for sudden severe decompensation without surgery.

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In some cases, patients may still have some function of the voice box, but are at risk of deterioration in the future.

The condition is usually progressive, so there will always be a degree of anxiety when considering those cases with some remaining function of the recurrent laryngeal nerves.

The potential for sudden severe decompensation without surgery is a significant concern for pet owners, and should be carefully considered when deciding on a course of action.

Here are some common complications associated with the 'tieback' procedure:

Laryngeal paralysis is a serious condition that requires prompt attention from a specialist.

The condition is often seen in brachycephalic breeds, which have short, flat faces.

Advanced laparoscopic procedures can be used to treat laryngeal paralysis, allowing for minimally invasive surgery.

Rigid endoscopy is another treatment option that allows specialists to examine the larynx and surrounding tissues.

Soft tissue conditions, including laryngeal paralysis, can be complex and require a range of treatments.

Brachycephalic breeds are prone to obstructive airway syndrome, which can exacerbate laryngeal paralysis.

Wound management is an essential part of the treatment and recovery process for laryngeal paralysis.

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