Campus Collusion
Review Questions for Test Preparation

       
    

  



Problems of Oxygenation VentilationMedical Surgical Nursing

Review Online for Free
Lies about Study Techniques: Believe them at your own risk.
www.NursingInAFlash.com

Page 3
Skip Navigation Links
Question Answer
A spinal cord injury above the level of ______ results in diaphragmatic paralysis and creates a dependence on a mechanical ventilator.
Show Answer
C3
What innervates the hemidiaphragms?
Show Answer
The right and left phrenic nerves, located between C3-C5
T/F It is possible to have partial diaphragmatic paralysis, one side that works, and one side that doesn't.
Show Answer
True, it is divided into two hemidiaphragms which are innervated by a left and right phrenic nerve. Paralysis can occur on one side only if only one nerve is injured.
Contraction of the intercostal and scalene muscles increases or decreases intrathoracic pressure?
Show Answer
Decreases (inhalation)...air flows high to low pressure...atmospheric air is high, intrathoracic low, allowing for air to flow in.
T/F Exhalation involves the neck and shoulder muscles, which assist in the effort.
Show Answer
False, exhalation is a passive process
The tendency for the lungs to recoil or reduce in volume after being stretched is called....
Show Answer
Elastic recoil
In the cases of COPD, or asthma, expiration is a process that requires effort. What muscles assist in expelling air in these conditions?
Show Answer
Abdominal, intercostal and accessory muscles like the scalenes and trapezius (shoulders and neck). This is what causes bulging and retraction that we look for in health assessments.
____________ is a measure of the ease of expansion of the lungs.
Show Answer
Compliance
T/F Lung compliance is increased in conditions like emphysema.
Show Answer
True. Compliance is increased in conditions that cause a destruction of alveolar walls and loss of tissue elasticity
PaO2 is...
Show Answer
The partial pressure of oxygen in arterial blood, the amount of oxygen dissolved in the plasma
Download these questions to your phone here
SaO2 is...
Show Answer
The arterial oxygen saturation, the amount of oxygen bound to the hemoglobin vs. how much is available to carry oxygen. I.e. 93% means 93 out of every 100 hemoglobins are bound to oxygen.
What is the oxygen-hemoglobin dissociation curve?
Show Answer
It is a model that explains the affinity of hemoglobin for oxygen. It is used to illustrate the effect certain conditions have on that affinity.
The top of an oxygen-hemoglobin dissocation curve reflects ______ condition, the bottom part of the curve represents oxygen binding by hemoglobin in the ____________.
Show Answer
Top - lungs Bottom-peripheral tissues
When hemoglobin that is saturated with oxygen arrives in the peripheral tissues, it will desaturate (thus delivering oxygen to the tissue) if the PaO2 in the area is ________ mm Hg.
Show Answer
30-40 mm Hg (normal is 80-100 mm Hg in the lungs)
What happens if the oxygen dissociation curve shifts to the left?
Show Answer
Blood picks up oxygen more readily in the lungs but delivers it less readily to peripheral tissues
What conditions can cause the oxygen dissociation curve to shift to the left?
Show Answer
Alkalosis, hypothermia, and low PaCO2
What happens when the oxygen dissociation curve shifts to the right?
Show Answer
Blood picks up oxygen less readily in the lungs but delivers oxygen more readily to the tissues.
What conditions cause a shift to the right in the oxygen dissociation curve?
Show Answer
Acidosis, hyperthermia, and high PaCO2
What two tests are useful in assessing the efficiency of gas transfer in the lungs?
Show Answer
Arterial Blood gasses (ABGs) and oximetry
What is measured in an Arterial Blood Gas (ABG)?
Show Answer
PaO2, PaCO2, pH, and HCO3- (bicarbonate) in arterial blood
What is a benefit of an arterial catheter?
Show Answer
It permits continuous monitoring of intraarterial blood gasses without repreated arterial punctures
  
Page 3 Skip Navigation Links
Not what your looking for, continue searching

    
Skip Navigation Links