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Thoracic Medicine

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Sleep Medicine

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Latest News

jetlagged2 One in three Australians suffer from poor quality sleep.  New research suggests sleep deprivation is costing the Australian economy more than $5.1 billion a year in both direct and indirect costs.

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january2012asthmalung  Many people with asthma have sensitivities to certain drugs that can precipitate an asthma attack. If you have asthma, you need to be aware of which medications may be triggers. You do not need to avoid these medications unless you know they are asthma triggers for you. If these medications have never triggered your asthma, it is still best to take the medications with caution because a reaction can occur at any time.

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Study suggests occasional treatment is effective and may reduce risk of decrease in growth.

Recent research now contests that the current recommended daily dosing of inhaled steroids for children under the age of five may be just as effective as less frequent treatments with a higher dose of inhaled steroids, leading to an overall reduced exposure to the drug.

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Plan charts course for future sleep and circadian research identifying opportunities for collaboration.

Recently the NIH has updated its plan for research into new approaches to the prevention and treatment of sleep disorders.  Over the next three to five years, the institute has recommended research initiatives to include looking at the connection between sleep and circadian systems, studying the influence of genetic and environmental factors that could influence a person’s sleep health, and conducting more comparative effectiveness trials to improve treatments for sleep and circadian disorders.

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ptsdcancer11 in 2 Australians will be diagnosed with cancer by the age of 85, with more than 60% of cancer patients surviving more than five years after diagnosis.According to a recent US study the hidden psychological scars caused by the diagnosis of cancer can leave scaring akin to that inflicted by war, with the impact in some cases lasting for years.

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ALZHEIMER’S AUSTRALIA MARCHES ON PARLIAMENT HOUSE

A group of 500 people marched on parliament on October 13 in the fight against dementia.  The assemblage gathered to demand a $500 million Dimentia Action Plan over five years in the next federal budget.  Alzheimer’s Australia president, Ita Buttrose led the march and warned there will be 75 000 baby boomers with dementia in 2020, just eight short years away. READ MORE

Chronic Obstructive Pulmonary Disease (COPD)

COPD

Chronic Obstructive Pulmonary Disease is a broad term to define airflow limitation that is not reversible. A patient usually has a component of emphysema, chronic bronchitis or a combination of the two. Diagnosis, analysis and treatment of COPD requires a range of professional medical services; including Medical Imaging, Pathology and Lung Function testing.

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Medical Imaging

pathology

Pathology

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Lung Function

 

Medical Imaging

Chest x-rays and CT scans are imaging studies that are commonly performed in patients with COPD; however, neither is required to diagnose COPD.

Chest x-rays — Plain chest x-rays have poor sensitivity for detecting COPD. COPD is identifiable on chest x-rays in only around 50% of patients with COPD.  Some features on x-rays that can be found (often in advanced disease) include:

  • Rapidly tapering vascular shadows, increased radiolucency of the lung, a flat diaphragm, and a long, narrow heart shadow on a frontal radiograph, accompanied by a flat diaphragmatic contour and an increased retrosternal airspace on a lateral radiograph. These findings are due to hyperinflation.

     

 



  • Bullae, defined as radiolucent areas larger than one centimeter in diameter and surrounded by arcuate hairline shadows. They are due to locally severe disease, and may or may not be accompanied by widespread emphysema. (See right)

 
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A C.T. Scan showing Lung Bullae




  • Prominent hilar vascular shadows and encroachment of the heart shadow on the retrosternal space. The cardiac enlargement may become evident only on comparison with previous chest radiographs. These findings are due to pulmonary hypertension and cor pulmonale, which can be secondary to COPD.

 
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Prominent Hilar Vascular Shadows



Computerised tomography — Emphysema can often be diagnosed through computed tomography (CT), but not chronic bronchitis or asthma.  High resolution CT has an even greater sensitivity and specificity for emphysema diagnosis than normal CT or plain chest x-ray.  CT can be used to determine the location and type of emphysema (centriacinar or panacinar). CT plays an important role in evaluating emphysematous patients for lung volume reduction surgery.

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Pathology

Arterial Blood Gases - Arterial blood gases are a blood test using blood taken from an artery, most commonly drawn from the wrist. Thie blood test can reveal mild or moderate hypoxemia without hypercapnia in patients with mild COPD. Hypomemia is the partial pressure decrease of oxygen in blood, decreased oxygenation in the blood is a serious condition leading to blacking out, inefficient bodily function and eventually premature death. As the disease progresses, the hypoxemia becomes more severe and hypercapnia develops.  Hypercapnia is where there is a high level of carbon dioxide in the blood, this usually causes a reflex causing increased respiration to increase oxygen and decrease carbon dioxide levels.. Hypercapnia occurs with increasing frequency as the forced expiratory volume in one second (FEV1) falls below one litre, the amount of air exhaled in one second. Blood gas abnormalities worsen during acute exacerbations and may also worsen during exercise and sleep.

Lung Function

Spirometry is the "Gold Standard" in diagnostic testing of COPD. Spirometry is a very simple test and measure inhalation and exhalation volumes of a patients breath. In COPD FEV1/FVC ratio should be below 0.7. This figure is determined from a vast number of studies which have tested lung function in healthy patient and then compared the results to patients confirmed to have COPD. The studies will compare data on sexes, ages and various other demographic variables to identify a range of "normal" functioning.

 

  • The patient with COPD has reduced peak expiratory flow, and severely decreased flows at 25%, 50% and 75% of vital capacity compared with the normal range (vertical bars), and shows minimal response to bronchodilator (BD). By comparison, the patient with chronic asthma shows incomplete, but substantial, reversibility of expiratory flow limitation across the range of vital capacity. After BD the forced expiratory volume in one second (FEV1) was within the normal range (82% predicted). Absolute and per cent predicted values for FEV1 and forced vital capacity (FVC) before and after BD are shown for each patient.

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The Wesley Lung Function Laboratory offers state-of-the-art lung function testing, including spirometry. More information on the Lab, lung function testing, lung conditions and our services can be found HERE.

Alternatively you can download our Educational Brochure about COPD below:

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Chronic Obstructive Pulmonary Disease (722KB)


Click HERE to download a referral form, these can be used by patients and doctors.

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