Which of the following will not cause the oxygen-hemoglobin
dissociation curve to shift to the right?
increased CO
increased CO2
increased H+
increased temperature - ANSWER -increased CO
You arrive at a small outlying facility to transport a patient who was
found unconscious in a structure fire and subsequently treated and
transported by EMS. The patient is now intubated and when you
arrive to transport the pattient you see the following values on the lab
report:
pH 7.25PaO2 91PaCO2 64Bicarb 18
What does this patient's ABG indicate?
A right shift on the oxyhemoglobin disassociation curve.
A compensated metabolic alkalosis
,A left shift on the oxyhemoglobin disassociation curve.
The inhalation of smoke containing high levels of 2,3 DPG - ANSWER
-A right shift on the oxyhemoglobin disassociation curve.
A 67-year-old male is brought in by EMS after being found
unconscious on the first floor of a burning building. On exam, his
respiratory rate is 14 breaths/min with scattered wheezes. He has no
evidence of any burns, but dark soot is caked around much of his
face. Suspecting inhalational injury, you expect this man's
oxygenhemoglobin curve will be
Up
Right
No change
Left - ANSWER -Left
An adult patient is being ventilated by EMS with a BVM through an
endotracheal tube and they are supplying 100% supplemental oxygen
at a rate of 30-40 breaths per minute This patient will most likely be
over ventilated and over oxygenated. This will be represented on the
oxyhemoglobin disassociation curve as:
,A shift to the right
Acidosis
A shift to the left
This patient will become homeostatic - ANSWER -A shift to the left
Which of the following will not cause the oxygen-hemoglobin
dissociation curve to shift to the right?
an increase in temperature
an increase in 2,3-DPG
an increase in PCO2
an increase in PO2 - ANSWER -an increase in PO2
With an increase in body temp comes:
, A left shift on the oxyhemoglobin disassociation curve
A decreased affinity for oxygen by hemoglobin
An NSAID to interrupt the inflammatory response
Decreased hydrogen ion concentration - ANSWER -A decreased
affinity for oxygen by hemoglobin
Because of the steep portion of the oxyhemoglobin disassociation
curve:
a small drop in systematic capillary PO2 in a metabolically active
tissue automatically makes large amounts of O2 available, because
O2 is released from hemoglobin as a result of a big drop in percent
hemoglobin saturation.
O2 loading is still almost normal even when alveolar PO2 falls up to
40%.
more O2 is physically dissolved in the systemic capillaries than in the
pulmonary capillaries.
there is a good margin of safety in O2-carrying capacity of the blood. -
ANSWER -a small drop in systematic capillary PO2 in a metabolically
active tissue automatically makes large amounts of O2 available,
because O2 is released from hemoglobin as a result of a big drop in
percent hemoglobin saturation.