Diseases of the Pleura Lecture 2 Dr.Mustafa Nema. Baghdad College of Medicine 2013 Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Case 1 A 28 years old previously healthy female presented with sudden onset of localized right sided chest pain and feeling of shortness of breath. OE: looks in pain, RR 22, PR 125. normal BP and Temp. CXR shown What’s your primary diagnosis? What’s your treatment plan? Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

case 1 The chest X-ray shows the sharply defined edge of the deflated lung with complete translucency (no lung markings) between this and the chest wall. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Case 2 A 56 years-old smoker man with history of COPD, presented with acute dyspnea and right sided chest pain. He looks distressed, cyanosed with PR 110, BP 90/60, RR 36, Temp 36.7. ECG: sinus tachycardia. No ischemic changes. CXR seen. What is your diagnosis? What will you find on chest exam? What is your management plan? Is there any other important differential Diagnoses before viewing CXR? Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Diseases of the Pleura Dr. Mustafa Nema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

PNEUMOTHORAX Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

PNEUMOTHORAX Pneumothorax (PNX) is the presence of air in the pleural space. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Types of PNX According to: Presence or absence of external cause: Spontaneous PNX ( no external cause) Primary Secondary Traumatic PNX ( external cause + ) Presence or absence of valvular mechanism between the lung and the pleural space: Closed PNX Open PNX Tension PNX Presence of different types of fluid with the air: Hydro- PNX ( usual pleural effusion) Haemo- PNX ( bloody effusion) Pyo-PNX ( pus=purulent effusion) Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Spontaneous: Primary occur without evidence of overt lung disease. Air escapes from the lung into the pleural space through rupture of a small subpleural emphysematous bulla or pleural bleb. It principally affects males aged 15-30 in whom smoking, tall stature and the presence of apical subpleural blebs are additional risk factors. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Bulla (bleb) on the lung apex Chest wall bleb lung Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Chronic obstructive pulmonary disease (COPD) Cystic fibrosis Secondary Occurs in patients with underlying lung disease. This includes patients with: Chronic obstructive pulmonary disease (COPD) Cystic fibrosis Chronic interstitial lung disease such as idiopathic pulmonary fibrosis Malignancy. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Traumatic pneumothorax Occurs when the lung is punctured by: A needle - during procedures such as insertion of a central line or lung biopsy Blunt force injury - for example, in a road traffic accident or fracturing a rib Mechanical ventilation - when this is the cause of a traumatic pneumothorax, the pneumothorax may rapidly worsen because mechanical ventilation increases alveolar pressures Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Closed and open PNX Where the communication between the lung and pleural space seals off as the lung deflates and does not reopen, the pneumothorax is referred to as 'closed PNX’. In such circumstances the mean pleural pressure remains negative, spontaneous reabsorption of air and re-expansion of the lung occur over a few days or weeks, and infection is uncommon.. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Mean pleural pressure is negative _ _ Closed PNX Mean pleural pressure is negative Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

'Open PNX’ occurs when the communication fails to seal and air continues to transfer freely between the lung and pleural space. An example of the latter is a bronchopleural fistula which, if large, can also facilitate the transmission of infection from the air passages into the pleural space, leading to empyema. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Mean pleural pressure atmospheric Broncho-pleural fistula Open PNX Mean pleural pressure atmospheric Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

An open pneumothorax is commonly seen following rupture of an emphysematous bulla, tuberculous cavity or lung abscess into the pleural space. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Tension pneumothorax occur when equilibrium fails to be established. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

+++ Tension PNX Mean pleural pressure positive Air continuously inter pleural space Air pushing mediastinum to other side +++ Tension PNX Mean pleural pressure positive Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

If the communication between the airway and the pleura is small, it can act as a one- way valve allowing air to enter the pleural space during inspiration but not to escape on expiration. Large amounts of trapped air accumulate in the pleural space and the intrapleural pressure may rise to well above atmospheric levels (a so-called 'tension' pneumothorax).. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Clinical features The commonest symptoms are sudden-onset unilateral pleuritic chest pain or breathlessness. In those with underlying chest disease, breathlessness can be severe and may not resolve spontaneously. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

On examination In patients with a small PNX the physical examination may be normal. A larger pneumothorax results in decreased or absent breath sounds. The combination of absent breath sounds and resonant percussion note is diagnostic of pneumothorax Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

In tension PNX, the findings are progressive breathlessness associated with a marked tachycardia, hypotension, cyanosis and tracheal displacement away from the side of the silent hemithorax. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Death from respiratory or cardiovascular collapse may occur. Tension PNX rapidly causes mediastinal shift and, if untreated, will lead to impaired venous return and cardiovascular collapse. Death from respiratory or cardiovascular collapse may occur. Occasionally, 'tension' PNX may occur without mediastinal shift if malignant disease or scarring has splinted the mediastinum Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Investigations Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

The chest x ray When you suspect that a patient has a tension pneumothorax and the patient is about to go into cardiovascular or respiratory failure, you cannot delay treatment by requesting a chest x ray. You must start treatment based on your examination alone. In most patients, there is time to obtain a chest x ray. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

The purpose of this x ray is to: Confirm the clinical diagnosis Allow you to estimate the size of the pneumothorax Potentially allow you to identify underlying disease of the lung parenchyma - you can then classify the pneumothorax as secondary. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Diseases of the Pleura Dr. Mustafa Nema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Diseases of the Pleura Dr. Mustafa Nema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

This frontal CXR reveals complete collapse of the right lung due to a massive right pneumothorax, which is also shifting the heart and other mediastinal structures to the left, (a tension pneumothorax). PNX Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Diseases of the Pleura Dr. Mustafa Nema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Surgical emphysema may complicate PNX when air escape to subcutaneous tissues Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

PNX in Diseased lung Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

A lateral (or decubitus) projection is recommended if the initial chest x ray is inconclusive. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

CT You should be able to diagnose and manage most pneumothoraxes through chest x ray. Where radiography is not definitive and clinical suspicion is high, a CT scan may be needed. If you are unable to distinguish between a pneumothorax and large bulla on the basis of the chest x ray, you may need to request a CT scan. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

PNX in Cystic lung disease Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

emphysematous bulla (not PNX) CT adds information regarding the presence or absence of pleural fluid and underlying pulmonary disease. emphysematous bulla (not PNX) Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Treatment Two main modalities: needle aspiration or intercostal chest tube drain. Less frequently surgery may be indicated. The principal factors determining the mode of therapyare: Patient symptoms The size of the pneumothorax The presence of underlying parenchymal lung disease. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Patient symptoms Primary pneumothorax where the lung edge is less than 2 cm from the chest wall and the patient is asymptomatic, normally resolves without intervention. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

When a patient is significantly symptomatic with breathless , a drainage procedure is always indicated, regardless of whether the pneumothorax is primary or secondary. All patients should receive supplemental oxygen as this accelerates the rate at which air is reabsorbed by the pleura. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

In young patients presenting with a moderate or large spontaneous primary pneumothorax, percutaneous needle aspiration of air is a simple and well-tolerated with a 60-80% chance of avoiding the need for a chest drain. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Size of PNX (small or large?) The British Thoracic Society guidelines define a small pneumothorax as less than 2cm distance from the lung edge to the chest wall, and a large pneumothorax as equal to or more than 2cm. A two centimetre pneumothorax corresponds to a volume loss of 50%, and is regarded as an objective indication for treatment. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Diseases of the Pleura Dr. Mustafa Nema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

The presence of underlying parenchymal lung disease In patients with underlying chronic lung disease, however, even a small secondary pneumothorax may cause respiratory failure; hence all such patients require intercostal tube drainage and inpatient observation. When needed, intercostal drains should be inserted in the 4th, 5th or 6th intercostal space in the mid-axillary line. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

indication for surgery: Lung not fully reinflated Bronchopleural fistula Recurrent PNX especially secondary one. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Note: Patients with a closed pneumothorax should not fly as the trapped gas expands at altitude. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Recurrent spontaneous PNX After primary spontaneous pneumothorax, recurrence occurs within a year of either aspiration or tube drainage in approximately 25% of patients, and should prompt definitive treatment. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

EMPYEMA Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

This term describes the presence of pus in the pleural space. Microscopically, neutrophil leucocytes are present in large numbers. The causative organism may be isolated from the pus. An empyema may involve the whole pleural space or only part of it ('loculated' or 'encysted' empyema) and is almost invariably unilateral. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Aetiology Empyema is always secondary to infection in a neighbouring structure, usually the lung. The principal infections are the bacterial pneumonias and TB. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Causes of empyema 'Para-pneumonic' effusion: - Over 40% of patients with community-acquired pneumonia develop an associated pleural effusion ('para-pneumonic' effusion) and about 15% of these become secondarily infected and empyema may developed. Infection of a haemothorax Rupture of a subphrenic abscess through the diaphragm. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

The pus in the pleural space is often under considerable pressure and if the condition is not adequately treated pus may rupture into a bronchus causing a bronchopleural fistula and pyopneumothorax developed. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Clinical features An empyema should be suspected in patients with pulmonary infection if there is persistence or recurrence of fever despite the administration of a suitable antibiotic. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Once an empyema has developed, two separate groups of clinical features are found: Systemic and local. systemic Pyrexia, usually high and remittent Rigors, sweating, malaise and weight loss Polymorphonuclear leucocytosis, high CRP Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Clinical signs of fluid in the pleural space Local features Pleural pain Breathlessness Cough and sputum usually because of underlying lung disease; copious purulent sputum if empyema ruptures into a bronchus (bronchopleural fistula) Clinical signs of fluid in the pleural space Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Radiological picture Chest X-Ray The appearances are often indistinguishable from those of pleural effusion. D-shape opacity -if present- is characterestic When air is present in addition to pus (pyopneumothorax), a horizontal 'fluid level' marks the interface between the liquid and air. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

D-shape opacity in epyema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Pyopneumo- thorax Fluid level present Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Ultrasound Ultrasound shows the position of the fluid, the extent of pleural thickening and whether fluid is in a single collection or multiloculated by fibrin and debris. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

CT scan In addition to showing the pleura, CT can be useful in assessing the underlying lung parenchyma and patency of the major bronchi. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Aspiration of pus This confirms the presence of an empyema. Ultrasound or CT is recommended to identify the optimal place to undertake aspiration, which is best performed using a wide-bore needle. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

The pus is frequently sterile when antibiotics have already been given; the distinction between tuberculous and non-tuberculous disease can be difficult and often requires pleural histology and culture. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Management Treatment of non-tuberculous empyema The only way in which an empyema can heal is by eradication of the infection, obliteration of the empyema space and apposition of the visceral and parietal pleural layers. This cannot occur unless re-expansion of the compressed lung is secured at an early stage by removal of all the pus from the pleural space. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

When the patient is acutely ill and the pus is thin an intercostal tube should be inserted into the most dependent part of the empyema space and connected to a water- seal drain system. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Although intrapleural fibrinolytic therapy is widely used in such situations, trial evidence of its benefit is conflicting. Antibiotic directed against the organism causing the empyema should be given for 2-4 weeks. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

An empyema can often be aborted if these measures are started early An empyema can often be aborted if these measures are started early. If, however, the intercostal tube is not providing adequate drainage, which can happen when the pus is thick or loculated, surgical intervention is required. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Treatment of tuberculous empyema Antituberculosis chemotherapy must be started immediately and the pus in the pleural space aspirated. Intercostal tube drainage is often required. In many patients no other treatment is necessary but surgery is occasionally required to ablate a residual empyema space. Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Empyema Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013

Thank you Diseases of the Pleura Dr.Mustafa Nema. Baghdad College of Medicine 2013