Week 7 and 8 Flashcards
Goals of airway clearance techniques:
optimize airway patency, increase ventilation and perfusion matching, promote alveolar expansion, increase gas exchange
Postural drainage
♣ Assumption of one or more body positions that allow gravity to assist with draining secretions from each lung segment
♣ Priority given to treating most affected lung segment first
Percussion
♣ Chest percussion aimed at loosening retained secretions (manually or mechanically)
Rate of percussion
100-140 times per min.
Vibration rate:
12-20 Hz per min
Idea behind percussion:
♣ the pressure exerted on thorax during vibration causes a volume of air to be expired that is greater than what is expired during normal tidal breathing
Position during percussion:
♣ Performed manually or mechanically and utilized in postural drainage positions to clear secretions
Four stages of cough:
- Inspiration greater than tidal volume – adequate = 60% of pt’s predicted vital capacity
- Closure of the glottis
- Abdominal and intercostal muscles contract, producing positive intrathoracic pressure
- Sudden opening of the glottis and the forceful expulsion of inspired air
Effective cough:
deep inspiration combined with trunk extension, a momentary hold, and then a series of sharp expirations while the trunk moves into flexion
Expiratory aid
negative pressure (vacuum) to the airway via the nose and mouth during the patient’s attempt to cough, along with a manual thrust to the abdomen to further increase cough flows
Who are breathing strategies, positioning and facilitation indicated for?
weakness of the diaphragm, unable to correctly use the diaphragm for efficient inspiration, or who have inhibition of the diaphragm muscle due to pain
To facilitate inspiration
o and ventilator movement strategies
♣ To facilitate inspiration – instruct pt to breathe in during shoulder flexion, abduction, and external rotation along with an upward gaze
To facilitate expiration
♣ shoulder extension, adduction, and internal rotation with downward gaze
Posterior pelvic tilt encourages:
diaphragmatic breathing pattern
What can sidelying position do?
reduce pressure as well as assist in lung expansion and secretion removal
Trendelenberg Position
legs elevated higher than head while supine
Benefits of Trendelenberg Position:
- Optimal for facilitating secretion drainage from the lower lobes
- Can also be used to increase BP of a hypotensive pt
Who is trendelenberg position contraindicated in?
pts with CHF or cardiomyopathy