PALS - DIAGNOSTIC TESTS
02 content is: - answer-- the total amount of 02 bound to hgb plus the unbound (dissolved) 02 in
arterial blood
ABG - answer-- measures partial pressure of arterial 02 (Pa02) & C02 (PaC02) dissolved in the
blood plasma (ie- liquid component of blood)
An elevated lactate level doesn't always represent tissue ischemia - answer-- especially when
there is no accompanying metabolic acidosis
-it is more helpful to monitor trends in conc. over time than any single measurement
arterial lactate - answer-- the arterial concentration of lactate reflects the balance between
lactate production & use
-in an ill/seriously injured child , the arterial lactate can rise as a result of increased production of
lactate (metabolic acidosis) assoc. with tissue hypoxia & anaerobic metabolism
cushings triad? - answer-1) low ABP's
2) high CVP
3) tachycardia
CVP monitoring - answer--can be monitored through a central venous catheter
-may provide helpful info to guide fluid & vasoactive therapy
CXR_ large heart implies: - answer--normal or increased preload or pericardial effusion
CXR- aids in the dx of what conditons: - answer-1)airway obstruction (upper & lower airway)
2)lung tissue disease
3)Barotrauma (complications r/t mechanical ventilation)
4) pleural disease (effusion/pneumothorax)
CXR- other uses - answer-- show depth of ET tube placement, but an anterior-posterior xray will
help determine tracheal vs esophageal placement
-evaluation of circulatory abnormalities to assess heart size & presence or abscence of CHF
(pulm edema)
CXR- small heart implies: - answer--preload is reduced
dx tests that help assess resp & circul. problems - answer-- ABG, VBG, hgb conc, central
venous 02 sat,arterial lactate
-CVP monitoring, invasive arterial pressure monitoring
-CXR
-ECG
-echo
-peak expiratory flow rate
ECG - answer-- obtain 12 lead to assess for cardiac arrythmias
Echocardiogram - answer-- valuable noninvasive tool for imaging:
02 content is: - answer-- the total amount of 02 bound to hgb plus the unbound (dissolved) 02 in
arterial blood
ABG - answer-- measures partial pressure of arterial 02 (Pa02) & C02 (PaC02) dissolved in the
blood plasma (ie- liquid component of blood)
An elevated lactate level doesn't always represent tissue ischemia - answer-- especially when
there is no accompanying metabolic acidosis
-it is more helpful to monitor trends in conc. over time than any single measurement
arterial lactate - answer-- the arterial concentration of lactate reflects the balance between
lactate production & use
-in an ill/seriously injured child , the arterial lactate can rise as a result of increased production of
lactate (metabolic acidosis) assoc. with tissue hypoxia & anaerobic metabolism
cushings triad? - answer-1) low ABP's
2) high CVP
3) tachycardia
CVP monitoring - answer--can be monitored through a central venous catheter
-may provide helpful info to guide fluid & vasoactive therapy
CXR_ large heart implies: - answer--normal or increased preload or pericardial effusion
CXR- aids in the dx of what conditons: - answer-1)airway obstruction (upper & lower airway)
2)lung tissue disease
3)Barotrauma (complications r/t mechanical ventilation)
4) pleural disease (effusion/pneumothorax)
CXR- other uses - answer-- show depth of ET tube placement, but an anterior-posterior xray will
help determine tracheal vs esophageal placement
-evaluation of circulatory abnormalities to assess heart size & presence or abscence of CHF
(pulm edema)
CXR- small heart implies: - answer--preload is reduced
dx tests that help assess resp & circul. problems - answer-- ABG, VBG, hgb conc, central
venous 02 sat,arterial lactate
-CVP monitoring, invasive arterial pressure monitoring
-CXR
-ECG
-echo
-peak expiratory flow rate
ECG - answer-- obtain 12 lead to assess for cardiac arrythmias
Echocardiogram - answer-- valuable noninvasive tool for imaging:
