Laryngeal Wheezing

Laryngeal wheezing – referred to in technical terms as laryngeal paralysis or laryngomalacia – means a partial or complete narrowing of the airways in the larynx area. Anyone who has ever watched a large older dog panting and heard this typical, almost roaring whistling sound knows how alarming it can sound. The condition occurs significantly more frequently in older, large dog breeds and arises because the muscles that open and close the larynx become weaker or fail completely. The result: shortness of breath – especially during excitement or exertion.

What happens in the larynx?

The larynx is, so to speak, the valve between the mouth and the trachea. When inhaling, the vocal cords and laryngeal muscles open; when swallowing, they close – so that no food enters the airways. A clever system, as long as it works.

In laryngeal paralysis or similar conditions, the vocal cords no longer work reliably. The airways narrow, and the characteristic whistling sound is produced when inhaling. In severe cases, breathing is so restricted that it can become a serious emergency.

Possible Causes

Laryngeal wheezing has various triggers – and it is worth looking closely at which one applies to your own dog:

1. Laryngeal paralysis (laryngeal palsy): By far the most common cause. The nerves that control the laryngeal muscles degenerate with age – especially in large breeds such as Labrador Retrievers, Golden Retrievers, Saint Bernards or Irish Wolfhounds. The vocal cords then simply do not open properly when inhaling.
2. Trauma or injury: An accident, a blow to the neck area or even surgical intervention in the neck region can permanently disrupt laryngeal function.
3. Tumours or growths: If a tumour grows in or near the larynx, it presses on the airways and narrows them – with corresponding consequences for breathing sounds and oxygen supply.
4. Congenital defects: Some dogs are born with a weak laryngeal structure. In certain breeds, this occurs already in puppyhood.
5. Infections or inflammation: Severe or chronic inflammation around the larynx can permanently impair the musculature.
6. Overweight: Too many kilos increase pressure on the airways and larynx – and can noticeably worsen existing problems.

How do you recognise laryngeal wheezing?

The symptoms vary greatly depending on the severity of the condition. The following signs should be known:

• Whistling or rattling breathing sounds: Especially when inhaling – this is usually the first thing owners notice.
• Shortness of breath: Clearly visible during exertion, excitement or on hot days.
• Coughing: Often dry and persistent, worsens with movement.
• Husky voice: The voice sounds changed, barking becomes difficult for the dog.
• Weakness and exhaustion: Anyone who gets too little air tires quickly – this applies to dogs as well.
• Blue-tinged gums (cyanosis): Blue-grey gums or a discoloured tongue are an alarm signal. Go to the vet immediately.
• Collapse: In advanced laryngeal paralysis, collapse can occur – the dog simply cannot get enough air.

Diagnosis at the vet

A reliable diagnosis requires a thorough veterinary examination. Depending on the findings, various methods are used:

1. Clinical examination: The vet listens to the dog’s breathing, checks for wheezing sounds and assesses the general condition – including weight, possible signs of infection and similar factors.
2. Laryngoscopy: The most important method of all. Under light sedation, a camera is inserted into the airways to see whether the vocal cords actually open during inhalation – or not.
3. X-ray or ultrasound: These can make tumours, narrowing or other structural abnormalities in the laryngeal area visible.
4. Blood tests: Help to rule out possible underlying diseases that could contribute to laryngeal paralysis.

Treatment options

How treatment is carried out depends heavily on the cause and severity. There are several approaches:

1. Surgical correction (laryngoplasty): In severe laryngeal paralysis, surgery is often the most effective approach. In the so-called “tie-back” procedure, a vocal cord is permanently tied back to widen the airways. This sounds drastic, but brings noticeable relief to many dogs.
2. Drug therapy: In mild cases or when surgery is not an option, anti-inflammatory agents or sedatives can dampen symptoms and defuse stressful situations – because stress demonstrably worsens breathing.
3. Weight management: A little less weight on the ribs can significantly reduce pressure on the airways. For overweight dogs, consistent weight reduction is worthwhile.
4. Environmental adjustments: Cool, quiet surroundings, no overexertion, avoiding stress sources – this sounds simple, but makes a real difference in everyday life.
5. Movement control: Excessive physical exertion can lead to shortness of breath. Short, gentle walks are more sensible than long tours – but it shouldn’t be without any movement either.

Course and prognosis

The long-term course depends very much on what lies behind the laryngeal wheezing and how pronounced it is. Dogs with mild laryngeal paralysis can live well for years with conservative measures. In more severe cases that are operated on, many owners report a significant improvement in quality of life – the dog is fitter, more active, more relaxed again. However, the disease can progress with age, which is why regular check-ups with the vet are advisable.