Respiratory Medicine

Feline upper respiratory infection (URI) is a disease complex born in large parts from stress and crowding. I would dare say that URI is perhaps the most frustrating illness facing shelter veterinarians, managers and staff in that many cats are chronically infected, vaccines are partially effective at best, and specific treatments are limited.

It is common to use the terms "kennel cough" or"infectious tracheobronchitis" when talking about canine infectious respiratory disease complex (CIRDC), this is in many cases not approproiate. The disease complex is not limited to the trachea,and often presents with signs other than coughing. In ma

Pulmonary vascular disease or pulmonary vascular obstructive disease (PVOD). is a catch-all term for conditions that affect the pulmonary circulation. These conditions are of particular importance to as they may result in severe respiratory dysfunction. As a review, the pulmonary and systemic circulation are in series, with the cardiac output of the left and right heart (in the absence of cardiac shunt) being equal.

The pleural space is defined as the area between the lungs and the chest wall. Normally there is no soft tissue or free air present in this space. A very small amount of fluid (undetectable on radiographs or ultrasound) may be present within the thoracic cavity. Clinical signs of pleural space disease include tachypnea or difficulty breathing.

Pulmonary edema is defined as the accumulation of abnormal amount of extravascular lung water. Pulmonary edema may range from clinically insignificant to life-threatening. Pulmonary edema forms when there is an alternation in the balance of Starling forces (hydrostatic and colloid osmotic) between the interstitium and pulmonary capillary beds that favors increasing filtration to the interstitium. Increased capillary hydrostatic forces will result in a low protein edema fluid while lowered colloid osmotic forces will promote a high protein edema fluid.

Cough is a common presenting complaint for dogs and, to a lesser extent, cats. Cough is a sign of an underlying disorder, not a primary disease. Therefore, the cause of the cough should be identified and the underlying disease, not just the cough, should be treated.

Treating animals with respiratory distress may be very challenging. It is essential for the practitioner to have a strong knowledge base of available therapeutic and diagnostic techniques. It is also prudent to be prepared for any potential complications that may develop during diagnostic or therapeutic interventions.

Lower respiratory tract disease produces typical clinical signs in cats, including chronic cough and wheeze as well as dyspnea that may have a sudden onset.1 Owners may report an increase in respiratory rate (>30-40 breaths per minute), increased expiratory effort and lethargy. Clinical signs may be mild to severe and may be chronic or intermittent.

Mycoplasma species have been isolated in our laboratory from cats with URTD (Veir et al 2004) and have been detected at a higher rate in cats with URTD than normal cats by other authors (Bannasch and Foley 2005). However, they are readily detected in the oropharynx and nasal cavity of normal cats as well (Randolph et al 1993, Tan et al 1977).

Consequences of chronic kidney disease are many and managing them is the hallmark of improving patient quality and quantity of life. Aside from continuous renal replacement therapy and renal transplants, management of azotemia, acid-base disorders, electrolytes, secondary hyperparathyroidism, nutrition, and hypertension are key.

Eosinophilic bronchopneumopathy is thought to be a pulmonary hypersensitivity disorder that may be triggered by certain drugs, inhaled environmental allergens, or a parasitic, fungal, or bacterial respiratory tract infection.

Canine eosinophilic bronchopneumopathy (EBP) is an important differential diagnosis for cough and dyspnea that practitioners frequently overlook because it is relatively uncommon.

Inhalant delivery of Aerosolized medication offers a number of theoretical benefits including an enormous absorptive surface area across a permeable membrane, a low enzyme environment that results in little drug degradation, avoidance of hepatic first-pass metabolism, and reproducible absorption kinetics.

Delivery of adequate oxygen to tissues and cells is the overall goal of the cardiovascular system. Oxygenation is dependant on cardiac output (heart rate and stroke volume), arterial blood pressure, circulating blood volume, and pulmonary function. Critically ill patients often have impairments to one or several of these processes resulting in hypoxemia, ischemia and cell death. Restoring these functions to normal insures oxygenation.

Feline asthma is one of the most common bronchopulmonary diseases in cats and is responsible for substantial morbidity and occasional mortality. It is an IgE mediated hypersensitivity response against what otherwise would be harmless environmental Aeroallergens.

Pleural effusion is a relatively common cause of respiratory distress in the dog and cat. Both species are affected by several types of effusion, with numerous causes and variable prognosis.

Cough is a common reason for dogs to be presented for veterinary care, and tracheal collapse is a common cause of chronic cough in dogs. The tracheal lumen remains open during both inspiration and expiration thanks to the support of cartilaginous rings.

Bacterial pneumonia encompasses a wide spectrum of disease from chronic to acute, unilobar or multilobar, and with clinical signs ranging from mild tachypnea or cough to rapidly progressive and fatal pulmonary infection. Cats are subject to bacterial pneumonia far less frequently than are dogs.

Respiratory disease is common in dogs, and can result in a constellation of clinical signs. These clinical signs range from those that are irritating to owners (e.g., nasal discharge, stridorous panting, chronic hacking cough) to those which are life-threatening and require immediate medical attention.

There are several ways to obtain samples from the airways and lower respiratory tract for cytologic evaluation and microbiologic culture. In general, samples should be handled quickly since respiratory epithelial cells degrade with some rapidity after retrieval, and samples should be handled gently to avoid damaging cell membranes.

The pulmonary system is complex with various anatomical structures performing highly specialized functions. When evaluating the system it is useful to examine each structure for its unique function and associated potential complications. Physical assessment and monitoring tools such as pulse oximetry and arterial blood gas analysis are used to localize respiratory problems and guide treatment which may include supplemental oxygen therapy, appropriate drugs or pulmonary physiotherapy.

Diseases of the respiratory tract are a common reason for cats seeking veterinary medical attention. Depending on the location and type of respiratory disease, the clinical signs are variable.

Recent years have seen the emergence of previously undescribed respiratory infections in dogs and cats. Although these infections remain rare, the potential exists for substantial morbidity and mortality.

Internal medicine experts weigh in on feline asthma, influenza, bacterial infections, and heartworm.

Cats who cannot breathe are the most fragile patients we treat each day. Cats tend to be more compromised on presentation as they hide their breathing issues better from their owners. It is important to balance diagnostic procedures with therapeutic intervention so that these cats can be quickly stabilized and effectively treated.

Acute upper respiratory tract disease (URTD) is a source of major morbidity and, less frequently, mortality in the domestic cat. It has been reported to be a major financial burden (Foley and Bannasch 2004) and a leading cause of euthanasia in shelters.

The goal of this presentation is to simply the diagnostic approach and treatment of nasal disease in the feline patient.

Although aspiration pneumonia is a common clinical diagnosis in dogs, studies on the causes, diagnostic findings, and outcome of affected dogs are sparse.

Acute lung injury and acute respiratory distress syndrome (ARDS) are challenging and frequently lethal respiratory disorders encountered in veterinary medicine.

Follow these steps to acquire arterial samples to help diagnose acute lung injury or ARDS.