Pneumothorax

Question 1

what is Pneumothorax

Answer 1

when air enters the pleural space due to disease or injury

Pneumothorax leads to a loss of negative pressure between the pleural membranes, potentially causing lung collapse.

Question 2

What are the two classifications of pneumothorax?

Answer 2

Spontaneous and traumatic

Spontaneous pneumothorax can be further classified as primary (i.e., no underlying lung disease) or secondary (i.e., due to underlying lung disease)

Question 3

What is a life-threatening variant of pneumothorax?

Answer 3

Tension pneumothorax

It can develop from any type of pneumothorax.

Question 4

List the common symptoms of pneumothorax.

Answer 4

• Sudden-onset dyspnea
• Ipsilateral chest pain
• Diminished breath sounds
• Hyper-resonant percussion on the affected side

Question 5

What additional symptoms are associated with tension pneumothorax?

Answer 5

• Distended neck veins
• Tracheal deviation
• Hemodynamic instability

Question 6

What is the immediate treatment for unstable patients with tension pneumothorax?

Answer 6

Immediate needle decompression

Question 7

What imaging technique may be used to confirm pneumothorax diagnosis in stable patients?

Answer 7

Chest x-ray

It helps visualize the presence of air in the pleural space.

Question 8

What may happen to small pneumothoraces?

Answer 8

They may resorb spontaneously

Question 9

What is usually required for larger pneumothoraces?

Answer 9

Placement of a chest tube

This procedure helps to remove air and re-establish negative pressure in the pleural space.

Question 10

primary spontaneous pneumothorax generally occurs in

Answer 10

males 16-25

Question 11

What causes primary (idiopathic or simple) pneumothorax?

Answer 11

Ruptured subpleural apical blebs.

Question 12

List the risk factors for primary spontaneous pneumothorax.

Answer 12

• Family history
• Male sex
• Young age
• Asthenic body habitus (slim, tall stature)
• Smoking (90% of cases): up to 20-fold increase in risk (risk increases with the cumulative number of cigarettes smoked)
• homocystinuria

Question 13

How does smoking affect the risk of spontaneous pneumothorax?

Answer 13

It increases the risk by up to 20-fold, especially with the cumulative number of cigarettes smoked.

Smoking is involved in 90% of cases.

Question 14

Name lung diseases that can lead to secondary pneumothorax.

Answer 14

COPD (Chronic Obstructive Pulmonary Disease).
Infections eg. Pulmonary tuberculosis, Pneumocystis pneumonia
Cystic fibrosis
Marfan syndrome
Malignancy
Catamenial pneumothorax (thoracic endometriosis, extremely rare)

Question 15

What is catamenial pneumothorax?

Answer 15

A rare type of pneumothorax associated with thoracic endometriosis.

It occurs in women and is extremely uncommon.

Question 16

What is iatrogenic pneumothorax?

Answer 16

A pneumothorax caused by medical procedures such as mechanical ventilation, thoracocentesis, central venous catheter placement, bronchoscopy, or lung biopsy.

Question 17

common causes of traumatic pneumothorax include

Answer 17

blunt trauma eg. thorax hitting the steering wheel during motor vehicle accident
penetrating injury eg. gunshot, stab wound
iatrogenic

Question 18

types of pneumothorax

Answer 18

Question 19

pathophysiology of tension pneumothorax

Answer 19

Question 20

clinical features of pneumothorax

Answer 20

P-THORAX: Pleuritic pain, Tracheal deviation, Hyperresonance, Onset sudden, Reduced breath sounds (and dyspnea), Absent fremitus, X-ray show collapse.

Sudden, severe, and/or stabbing, ipsilateral pleuritic chest pain and dyspnea
Reduced or absent breath sounds, hyperresonant percussion, decreased fremitus on the ipsilateral side
subcutaneous emphysema

Question 21

what is subcutaneous emphysema

Answer 21

A condition that results from entrapment of air or gas into the subcutaneous tissues and typically presents with sudden, painless soft tissue swelling, often around the upper chest, neck, and face. Often identified by eliciting crepitus on examination. Etiologies include pulmonary barotrauma (as during mechanical ventilation), surgery, and infection (e.g., gas gangrene).

Question 22

clinical features of tension pneumothorax

Answer 22

Severe acute respiratory distress: cyanosis, restlessness, diaphoresis
Reduced chest expansion on the ipsilateral side
Distended neck veins and hemodynamic instability (tachycardia, hypotension, pulsus paradoxus)

Question 23

signs of tension pneumothorax in ventilated patients

Answer 23

Tachycardia, hypotension (obstructive shock)
Distention of jugular vein
Rapid decrease in SpO2
Reduced air flow
Increased ventilation pressure
Skin emphysema

Question 24

what kind of x-ray do you need

Answer 24

upright PA chest in inspiration
supine CXR is less sensitive, but may be necessary in trauma patients. US is useful in these cases.

Question 25

supportive findings of tension pneumothorax on CXR

Answer 25

Ipsilateral diaphragmatic flattening/inversion and widened intercostal spaces Mediastinal shift toward the contralateral side Tracheal deviation toward the contralateral side

Question 26

what is pneumomediastinum

Answer 26

presence of gas (usually air) in the mediastinum

Question 27

clinical features of pneumomediastinum

Answer 27

sudden onset chest pain radiating to the back dyspnea subcutaneous emphysema cough rhinolalia (nasal quality of voice, Occurs due to the presence of air within the soft palate) hoarseness Hamman sign: precordial crepitation that is audible synchronous to the heartbeat

Question 28

CXR signs of pneumomediastinum

Answer 28

Air outlining the mediastinal structures (e.g. aorta, trachea) Visible mediastinal pleura

Question 29

management of pneumomediastinum

Answer 29

usually self-limited when associated with barotrauma Clinical and radiographic monitoring Ventilation pressure reduction

Question 30

management for unstable patients with pneumothorax

Answer 30

Unstable or high-risk patients: e.g., with tension pneumothorax, bilateral pneumothorax, or who require mechanical ventilation Immediate chest decompression Treat obstructive shock if present.

Question 31

management of stable spontaneous pneumothorax patients

Answer 31

Stable spontaneous pneumothorax management: depends on the risk of progression and recurrence Low-risk: conservative management Higher risk: chest tube placement

Question 32

consults to consider for pneumothorax

Answer 32

Pulmonology: stable spontaneous pneumothoraces Thoracic surgery: traumatic pneumothoraces, large secondary pneumothoraces ICU: unstable patients or those with large secondary pneumothoraces

Question 33

features of deterioration

Answer 33

worsening pain and breathlessness, tachypnea, tachycardia, hypoxia, hypotension

Question 34

what will positive pressure ventilation do in a pneumothorax

Answer 34

Positive pressure ventilation can turn a simple pneumothorax into a life-threatening tension pneumothorax.

Question 35

for patients who require mechanical ventilation in pneumothorax

Answer 35

In every patient with pneumothorax who requires mechanical ventilation, immediate tube thoracostomy should be performed first.

Question 36

respiratory support for the pneumothorax patient

Answer 36

Upright positioning Provide supplemental high-flow oxygen as needed (target SpO2 ≥ 96–100%) [6] If a patient requires mechanical ventilation, emergency chest tube placement is indicated. Positive pressure ventilation can turn a simple pneumothorax into a life-threatening tension pneumothorax. Decompression of a pneumothorax can sometimes rapidly improve dyspnea, making mechanical ventilation unnecessary. Start all patients without risk factors for hypercapnia on high-flow oxygen as soon as pneumothorax is suspected because high-flow oxygen aids reabsorption of the pneumothorax, which accelerates recovery.

Question 37

Primary spontaneous pneumothorax with Apex-to-cupola distance < 3 cm

Answer 37

Usually resolves spontaneously within a few days (∼ 10 days) Perform a repeat chest x-ray at 3–6 hours: Stable or improving appearance: Consider outpatient management

Question 38

Primary spontaneous pneumothorax with Apex-to-cupola distance > 3 cm

Answer 38

Chest tube placement typically recommended

Question 39

needle thoracostomy procedure

Answer 39

Indication: tension pneumothorax Procedure: Immediate insertion of a large-bore needle In adults: use the 2nd intercostal space at the midclavicular line or the 4th–5th intercostal space between the anterior and midaxillary line (especially in muscular or obese patients) [24] In children: use the 2nd intercostal space at the midclavicular line Typically followed by the insertion of a chest tube

Question 40

safe triangle

Answer 40

An area of the chest that allows for thoracostomy with reduced risk of injury to vessels, nerves, and muscle Extends from the base of the axilla to the 5th intercostal space Bounded by the lateral borders of the latissimus dorsi and pectoralis major

Question 41

finger thoracostomy

Answer 41

Indications Tension pneumothorax with unsuccessful needle decompression Traumatic cardiac arrest Procedure Initial steps: identical to chest tube placement Difference compared to chest tube placement A gloved finger is inserted into the pleural space to create an open pneumothorax. No chest tube is inserted or secured.

Question 42

education for patients after pneumothorax

Answer 42

Advise patients not to fly until they have had one week of full resolution of the pneumothorax. Inform patients that they should abstain from scuba diving for life. Educate patients on the risk of recurrence (1 in 3 patients). Provide support for smoking cessation (continued smoking is associated with an increased risk of recurrence). In patients for whom a recurrence would place them at high risk (regular fliers, scuba divers), consider referral to a cardiothoracic surgeon.

Question 43

acute management check list for tension pneumothorax

Answer 43

Administer high-concentration supplemental oxygen (100% FiO2). Avoid positive pressure ventilation. Perform emergency needle decompression if the patient is hemodynamically unstable, followed by tube thoracostomy. Serial CXR Continuous telemetry, continuous pulse oximetry Transfer to ICU.

Question 44

recurrence rate of spontaneous pneumothorax

Answer 44

Spontaneous pneumothorax has a recurrence rate up to 50% within the first 2 years.

Question 45

what is mediastinal flutter

Answer 45

On expiration, air exits the pleural space and the mediastinum shifts back to the affected side. The recurrent mediastinal shift during respiration is called mediastinal flutter. It may impair venous return to the heart and cause severe hemodynamic instability.