Lecture 04 Management of the Adult Requiring Chest Tube Drainage and Therapy Flashcards
Where does the pleural space lie?
Between parietal and visceral pleura of the chest wall and lungs
What does the parietal pleura line and what does the visceral pleura line?
Parietal pleura lines the chest walls The visceral pleura surrounds the lungs
The pleural space contains pleural fluid, which functions as what? (2)
- Pleural fluid prevents friction between the visceral and parietal pleura during inspiration and expiration in the respiratory cycle. 2. Pleural fluid helps maintain integrity of the 2 spaces and maintains negative intrapleural pressure to keep the lungs expanded.
What may it mean if you hear pleural friction rub?
R/t pleural spaces being inflame, or loss of lubrication. This typically occurs in pt with PNA, PE, Pleurisy
Some physiology of respiration?
•Passive, involuntary activity
- Air moves in and out due to pressure changes in the lungs
- When diaphragm is stimulated, it contracts and moves downwards
- External intercostals move the ribcage up and out
- Chest wall and parietal pleura move out, pulling the visceral pleura and lung with it
- As the volume in the thoracic cavity increases, the pressure within the lung decreases
•Intrapulmonary pressure is now lower than atmospheric pressure; thus air flows into the lung (inhalation)
Physiology of Respiration Expiration?
- When the diaphragm returns to its normal, relaxed state
- The intercostal muscles also relax and the chest wall moves in
- The lungs, with natural elastic recoil, also pull inward and air flows out of the lungs
•Intrapulmonic pressure is now greater than atmospheric pressure which is what causes the air to flow from the lungs and out to the atmosphere (exhalation)
What are functions of surfactant? (3)
- Increase compliance (lung expansion)
- Prevent atalectasis (collapse at the end of expiration
- Reduces fluid accumulation thereby keeping the surfaces dry
What causes pneumo? how do you maintain it?
- If air or fluid enters the pleural space, it separates the visceral from the parietal pleura, disrupting the negative pressure (prevents the lungs from collapsing at the end of exhalation), and compresses the lung
- If only a small amount of air or fluid is present, it may be reabsorbed without intervention.
- If large enough, the air/fluid compromises normal breathing and must be evacuated from the pleural space.
Essentially looks to maintain negative presssure within the pleural space
What exactly is Pneumothorax and the 3 types?
Pneumothroax= air in pleural space
- Spontaneous
- Closed
- Open
Pneumothorax Signs?
Symptoms?
Signs: Tachypnea, tachycardia, decreased or absent breath sounds over the affected area
Symptoms: Pain which worsens with inspiration, dyspnea, cough, sudden stabbing pain on the side of the pneumothorax
Spontaneous Pneumothorax
Common causes?
Pt may describe hearing or feeling a “pop”
Common causes:
Excessive coughing
Smoking
Tall thin men
People with COPD and Cystic Fibrosis
Ruptured pulmonary blebs (small subpleural thin walled air containing spaces that if ruptured, allow air to escape into pleural spaces resulting in a spontaneous pneumothorax)
High impact stress from sports activities such as basketball and football
Spontaneous Pneumothorax:
Treatments:
Treatments include : high flow O2., chest tube, and consider position in bed…likely more comfortable in high fowlers
What occurs during a closed pneumothorax?
- Involves penetration of the pleural space but the chest wall remains intact
- Air enters the pleural space from within the lung
Closed pneumothorax could be caused by?
Often caused by a rib fracture that punctures the lung or as a result of medical procedures such as insertion of a central line or cardiac pacemaker wires via the subclavian vein
Penetration is often described as blunt trauma
This is why we always get a chest xray after Central line placement and pacing wires removed
How does an Open Pneumothorax occur?
- The chest wall and pleural space are penetrated
- Air enters the pleural space
Causes of Open Pneumothorax?
Caused by penetrating trauma: knife, gun shot, projectile or as a result of surgical procedure (thoracotomy) which involves a surgical incision to the thoracic cavity or may be a complication of a surgical procedure
Surgical procedure is known as a thoracotomy (need access to heart, lungs, espohagus)
What is a Hemothorax?
Blood in the pleural space
Hemothorax causes?
Causes: thoracic or heart surgery
blood clotting disorder
pulmonary infarction (death of lung tissue)
lung cancer
tear of a blood vessel when placing a central venous catheter or when associated with severe hypertension
TB
What is Hemopneumothorax?
•Collection of blood and air in the pleural space
What would treatment of hemopneumothorax invovle?
Requires two tubes to be inserted.
For a hemopneumothorax, two chest tubes inserted; one at the apex (2nd intercostal space) to drain air, the other at the base of the lung to drain fluid
Def Tension Pneumothorax?
- Air leaks into the pleural space through a tear in the lung and has no way to escape
- With each breath, air accumulates in the pleural space increasing positive pressure which compresses the lung & shifts the mediastinum to the unaffected side of the chest
- Venous return and cardiac output are decreased
Treatment of Tension Pneumothorax?
Having a chest tube will not prevent someone from obtaining a tension pneumo
Treatment…thorocostomy (needle or otherwise). Generally a small area will just be a needle. If fluid has leaked will see a chest tube placed
Serious issue!!