Test 2 N360 Flashcards
What is a good PaO2
> 60
fluid qty needed for sepsis
30ml/kg bolus
What is SpO2
Arterial oxygen saturation
hours to give the blood once you recv it? lab
4 hours
how many cc’s is a packed cell worth? lab
250-300ml
What part of the brain drives inspiration and expiration
pons and medulla oblongata
what causes desorientation, tremors, seizures, adn coma
respiratory acidosis
Reduced oxygenation of arterial blood is what
hypoxemia
What is the inhalation of oxygen and exhilation of carbon dioxide
ventilation
abnormally low number of RBCs
anemia
What the 3 classifications of anemia
- decreased production
- premature destruction
- increased loss
hemoglobin saturation is measured by what
SaO2 saturation of atrial oxygen
oxygen dissolved in plasma is measured by what
PaCO2
what can cause impaired ventilation
inadequate muscle or nerve function
narrowed airways
poor gas diffusion
what develops during hypoventilation
respiratory acidosis
normal PaO2 value and % of total o2
80 to 100 3%, this isnt SaO2, but >60 is good
normal SaO2 value and % of total o2
95-100 97% of total
what is the measurement of ventilation capability
PaCO2
what is the maximum amt of O2 a person with COPD should recv.
3L/min,> 3L may remove their desire to breath
the simple face mask delivers what % of O2
35-50
the simple face mask delivers what L of O2
6-12L/min
the nasal cannula delivers what % of O2
24-44%
the nasal cannula delivers what L of O2
1-4L
the partial rebreather or nonrebreather mask delivers what % of O2
60-90%
the partial rebreather or nonrebreather mask delivers what L of O2
10-15L
Venturi masks deliver what % of O2
24-50%, precise
A nurse is caring for a patient diagnosed with acute respiratory distress syndrome. The nurse is aware that these patients often will require which intervention?
Patients with acute respiratory distress syndrome likely will require mechanical ventilation to support their respiratory status. Frequent suctioning is not required often, but some suctioning may be required. Peritoneal dialysis and creatinine and BUN testing might be necessary with some level of kidney failure, not respiratory compromise.`
When caring for the patient with acute respiratory distress syndrome (ARDS), the critical care nurse knows that therapy is appropriate for the patient when which goal is being met?
- pH is 7.32
- PaO2 is greater than or equal to 60 mm Hg
- (PEEP) increased to 20 cm H2O caused blood pressure (BP) to fall to 80/40
- No change in PaO2 when patient is turned from supine to prone position
The overall goal in caring for the patient with ARDS is for the PaO2 to be greater than or equal to 60mm Hg with adequate lung ventilation to maintain a normal pH of 7.35 to 7.45. PEEP usually is increased for ARDS patients, but a dramatic reduction in BP indicates a complication of decreased cardiac output. A positive occurrence is a marked improvement in PaO2 from perfusion better matching ventilation when the anterior air-filled, nonatelectatic alveoli become dependent in the prone position.
Text Reference - p. 16
The nurse assesses a patient admitted 2 days ago with a diagnosis of chest trauma after a motor vehicle accident. Oxygen is being delivered at 60% by way of Venturi mask. Which assessment finding indicates the development of adult respiratory distress syndrome?
One of the main characteristics of adult respiratory distress syndrome (ARDS) is worsening hypoxemia despite increased delivery of higher concentrations of oxygen. An increase in urine specific gravity is not associated with ARDS. Wheezing and stridor and dyspnea may be present and progress to respiratory distress in the patient with ARDS.
Upon reviewing the reports of a patient, the nurse determines that the patient is at risk for hypoxia. Which finding supports the nurse’s conclusion
he partial pressure of oxygen of 45 mm Hg or less in arterial blood indicates that the patient has risk of hypoxia due low blood oxygen levels. A ventilation/perfusion ratio of 1:1 is a normal finding and does not indicate that the patient has risk of hypoxia. An inspiratory to expiratory ratio of 1:2 is a normal finding and does not indicate that the patient has respiratory distress or risk of cyanosis. If patient’s partial pressure of carbon dioxide in arterial blood is 30 mm Hg, it indicates that the patient has normal ventilator demand and supply and does not have risk of hypercapnia or hypoxemia.
Test-Taking Tip: You have at least a 25% chance of selecting the correct response in multiple-choice items. If you are uncertain about a question, eliminate the choices that you believe are wrong and then call on your knowledge, skills, and abilities to choose from the remaining responses.
Text Reference - p. 1658
azithromycin (Zithromax) help to prevent
infections.
Propofol (Diprivan) is a XX and XX drug mainly administered to mechanically ventilated patients in respiratory failure.
sedative and analgesic
Albuterol (Ventolin) is a XX that reduces bronchospasm. It helps to promote alveolar ventilation.
bronchodilator
XX is an opioid used to decrease anxiety caused by hypoxia.
Fentanyl (Sublimaze)
The nurse is providing care for an older adult patient who is experiencing low partial pressure of oxygen in arterial blood (PaO2) as a result of worsening left-sided pneumonia. Which intervention should the nurse use to help the patient mobilize secretions?
Augmented coughing and huff coughing techniques may aid the patient in the mobilization of secretions. If positioned side-lying, the patient should be positioned on the right side (good lung down) for improved perfusion and ventilation. Suctioning may be indicated, but always should be performed cautiously because of the risk of hypoxia. NIPPV is inappropriate in the treatment of patients with excessive secretions.
Text Reference - p. 1661
The nurse is monitoring a patient through pulse oximetry. What is monitored through pulse oximetry?
Pulse oximetry is a noninvasive method to determine oxygen saturation levels. It may be used intermittently or continuously to assess SpO2. Pulse oximetry cannot be used to assess inspired oxygen concentration, expired oxygen concentration, or venous oxygen saturation. These can be measured through arterial blood gases measurements or pulmonary artery pressure monitoring.
Text Reference - p. 1654
The nurse is caring for a patient with respiratory failure. What information should the nurse include when explaining the disease condition to the family members?
Respiratory failure is classified as hypoxemic or hypercapnic. Respiratory failure results when gas exchanging functions are inadequate, i.e., insufficient oxygen is transferred to the blood or inadequate carbon dioxide is removed from the lungs. Although respiratory failure may be secondary to cardiac failure, not all cases of respiratory failure are secondary to cardiac failure. Respiratory failure is not a disease but a symptom of an underlying pathologic condition affecting lung function, oxygen delivery, cardiac output, or the baseline metabolic state.
Respiratory failure is categorized as XX or XX
hypoxemic or hypercapnic.
The nurse is caring for a patient with a shunt due to acute respiratory distress syndrome (ARDS). Which nursing intervention is associated with better symptomatic relief for this patient?
Patients with ARDS having a shunt disorder are usually more hypoxemic than patients with ventilation-perfusion (V/Q) mismatch. They often require mechanical ventilation and a high FIO2 in combination to improve gas exchange. Bronchodilators and corticosteroids are not helpful for immediate relief because the patient does not have bronchospasm and inflammation.
Text Reference - p. 1656
A patient has benzodiazepines (lorazepam [Ativan]) and opioids (morphine) ordered to decrease anxiety, agitation, and pain. What are the nursing roles in managing this patient?
The nurse has to monitor patients closely for cardiopulmonary depression when giving benzodiazepines such as lorazepam (Ativan) and opioids (morphine). Patients receiving these agents are best managed by following an evidence-based protocol that includes a regular “sedation holiday” for ongoing assessment. Sedative and analgesic agents may have a prolonged effect in critically ill patients, delay weaning from mechanical ventilation, and contribute to increased length of stay. If respirations become depressed, then the dose of morphine has to be reduced.
Text Reference - p. 1663
The nurse understands that one way to assess the degree of impairment in gas exchange is to measure the arterial oxygen/fraction of inspired oxygen (PaO2/FIO2, or P/F) ratio. What is the P/F ratio in acute lung injury (ALI)?
- Greater than 400
- Greater than 300
- Less than 200
- Between 200 and 300
In ALI, the P/F ratio is between 200 and 300. This indicates compromised gas exchange through the alveoli. Under normal circumstances, when PaO2 is 85 to 100 mm Hg and FIO2 is 0.21, the P/F ratio would be greater than 400. The term acute respiratory distress syndrome (ARDS) is used when the P/F ratio is less than 200 (e.g., 80/0.8 = 100) and indicates refractory hypoxemia.
Text Reference - p. 1665
A patient with respiratory distress is agitated and confused. What is the best nursing action?
Call the provider, then give O2
A nurse is caring for a patient diagnosed with acute lung injury who has a PaO2 of 48 mm Hg. Which condition does the nurse expect?
Hypoxemia, an inadequate amount of oxygen in the blood, frequently is quantified as a PaO2 of less than 50 mm Hg. If allowed to progress, hypoxemia can result in hypoxia, which is defined as an inadequate amount of oxygen available at the cellular level such that cells experience anaerobic metabolism.
Text Reference - p. 1658
?? is a condition characterized by an inability of the cells to use oxygen properly despite adequate levels of oxygen delivery.
Dysoxia
The nurse is caring for an 83-year-old patient and is reviewing laboratory results. The PaO2 is 76 mm Hg. What nursing action is appropriate for this finding?
Age affects normal arterial blood gas (ABG) values. Elderly people have a lower PaO2 level, with a decrease in approximately 10 mm Hg per decade. Normal ABG values are ranges for normal, healthy adults. It is important to establish a baseline for the individual because abnormal values become “normal” for some individuals. Notifying either respiratory therapy or the primary health care provider is not necessary at this time. Administering oxygen is not necessary at this time.
Text Reference - p. 1665
Which medication helps to decrease heart rate and improve cardiac output in the patient with respiratory failure and atrial fibrillation?
Diltiazem (Cardizem) is a calcium channel blocker and potent vasodilator. It increases the blood flow through the arteries and decreases the heart rate. Calcium channel blockers reduce blood pressure and increase cardiac output. Administration of nitroglycerine (Tridil) decreases pulmonary congestion caused by heart failure. Metaproterenol (Alupent) is a bronchodilator. It improves breathing by relaxing the muscles in the airways. Methylprednisolone (Solu-Medrol) is administered in conjunction with bronchodilators to treat bronchospasm and asthma.
Diltiazem (Cardizem) is a
calcium channel blocker and potent vasodilator.
What reduce blood pressure and increase cardiac output.
Calcium channel blockers
Metaproterenol (Alupent) is a
bronchodilator.
pCO2
verify
ventilate for copd’rs lab
verify
What is the arterial oxygen/fraction of inspired oxygen (PaO2/FIO2, or P/F) ratio in acute respiratory distress syndrome (ARDS)?
The nurse in the cardiac care unit is caring for a patient who has developed acute respiratory failure. The nurse knows that which medication is being used to decrease this patient’s pulmonary congestion and agitation?
For a patient with acute respiratory failure related to the heart, morphine is used to decrease pulmonary congestion as well as anxiety, agitation, and pain. Albuterol is used to reduce bronchospasm. Azithromycin is used for pulmonary infections.
What is used to reduce airway inflammation and edema
Methylprednisolone
? is most effective in treating patients with respiratory failure resulting from chest wall and neuromuscular disease
NIPPV
If the P/F ratio is
ARDS
If the P/F ratio is 200-300 what do you have
ALI- acute lung injury
what is a good P/F ratio
> 400
what gas is not absorbed by the lungs and why is it important
Normally, nitrogen (which constitutes 79% of the air that is breathed) is not absorbed into the bloodstream. This prevents alveolar collapse. When high concentrations of O2 are given, nitrogen is washed out of the alveoli and replaced with O2 . If airway obstruction occurs, the O2 is absorbed into the bloodstream and the alveoli collapse. This process is called absorption atelectasis.
? is a sudden and progressive form of acute respiratory failure in which the alveolar-capillary interface becomes damaged and more permeable to intravascular fluid
Acute respiratory distress syndrome (ARDS)
The patient’s risk for O2 toxicity increases when the FIO2 exceeds ?%
60%
What causes ARDS?
sepsis, aspiration of gastric contents, gram negative especially, trauma, embolism, near drowning, head injury, shock states, anaphylaxis, acute pancreatitis
moving gas from high pressure to low pressure
diffusion
total volume of gas exchange between atmosphere and lungs
pulmonary ventilation
Elevate HOB to what with resp failure
at least 45*
What unusual thing can you do to patients with ARDS?
put them in a prone position (hogan p52)
O2 concentrations increase by how many % per liter of O2
4% for each Liter of O2
above what limit is bad for chest tube drainage per hour in mLs
> 100mLs
inadequate oxygenation causes the heart to do what
tachy
pursed lip breathing reduces what
co2
what is one of the most effective bronchodilators for COPD
ipratropium