Exam (elaborations)
HESI Dosage Calculations Practice Exam 2024/2025 Questions With Completed Solutions.
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HESI Dosage Calculations Practice Exam 2024/2025 Questions With Completed Solutions.
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HESIDosage
Calculations
Practice
Exam
A
client
with
cardiogenic
shock
weighs
220
lb
and
is
receiving
dopamine
at
the
rate
of
3
mcg/kg/minute.
The
solution
strength
available
is
dopamine
400
mg
in
250
ml
of
D5W.
The
nurse
should
set
the
infusion
pump
to
deliver
how
many
ml/hour?
(Enter
numeric
value
only.
If
rounding
is
required,
round
to
the
nearest
tenth.)
-
ANS
11.3
First,
convert
pounds
to
kg,
220
lb
:
X
=
2.2
lb
:
1
kg
=
100
kg.
Next,
calculate
the
dosage
per
minute,
3
mcg/kg/min
x
100
kg
=
300
mcg/min.
Convert
mcg/min
to
mcg/hour,
300
mcg/min
x
60
min=18,000
mcg/hour.
Convert
mcg/hr
to
mg/hour,
18,000
mcg/hr
=
18.0
mg/hour.
Calculate
the
rate,
400
mg
:
250
ml
=
18
mg
:
X
ml
400X
=
4500
X
=
11.25
=
11.3
ml.
So,
18
mg/11.3
ml
should
be
infused
at
11.3
ml/hour.
A
client
with
hypertension
who
weighs
72.4
kg
is
receiving
an
infusion
of
nitroprusside
(Nipride)
50
mg
in
D5W
250
ml
at
75
ml/hour.
How
many
mcg/kg/minute
is
the
client
receiving?
(Enter
numeric
value
only.
If
rounding
is
required,
round
to
the
nearest
tenth.)
-
ANS
3.5
Calculate
the
mg/hour
infusing,
50
mg
:
250
ml
=
X
:
75
ml
250X
=
3750
and
X
=
15
mg/hour.
Next,
convert
mg/hr
to
mcg/hour,
15
mg/hour
=
1
mg
/
1000
mcg
=
15,000
mcg/hour,
then
divide
by
60
min
=
250
mcg/minute.
Lastly,
250
mcg/72.4
kg/min
=
3.45
=
3.5
mcg/kg/minute.
A
client
who
weighs
70
kg
is
receiving
a
dopamine
solution
of
800
mg/500
ml
normal
saline
at
5
ml/hour.
How
many
mcg/kg/minute
is
the
client
receiving?
(Enter
numeric
value
only.
If
rounding
is
required,
round
to
the
nearest
tenth.)
-
ANS
1.9
To
change
ml/hour
to
mcg/kg/minute,
use
the
formula:
desired
rate
(5
ml/hour)
/
volume
available
(500
ml)
x
dose
available
(800
mg)
=
8
mg/hour.
Next,
convert
milligrams/hour
to
mcg/kg/minute:
mg
(8)
x
1000
/
kg
(70)
/
60
minutes
=
1.904
=
1.9
mcg/kg/minute.
A
client
is
receiving
an
IV
solution
of
sodium
chloride
0.9%
(Normal
Saline)
250
ml
with
amiodarone
(Cordarone)
1
gram
at
17
ml/hour.
How
many
mg/minute
of
amiodarone
is
infusing?
(Enter
numeric
value
only.
If
rounding
is
required,
round
to
the
nearest
tenth.)
-
ANS
Convert
grams
to
mg,
1
gram
equals
1,000
mg.
Using
ratio
and
proportion
-
1,000
mg
:
250
ml
::
X
mg
:
1ml
250X=
1,000
so
X
=
4
mg/ml
is
the
solution
concentration
of
amiodarone.
The
infusion
rate
(ml/hour)
x
concentration
(mg/ml)
divided
by
60
minutes/hour
17
ml/hour
x
4
mg/ml
=
68/60
=
1.13
=
1.1
mg/minute.
A
client
who
weighs
176
pounds
is
receiving
an
IV
infusion
with
esmolol
hydrochloride
(Brevibloc)
at
48
ml/hour.
The
IV
solution
is
labeled
with
the
concentration
of
Brevibloc
10
mg/ml.
How
many
mcg/kg/minute
is
the
client
receiving?
(Enter
numeric
value
only.)
-
ANS
100 Convert
pounds
to
kg
by
dividing
176
pounds
by
2.2
pounds
=
80
kg.
Convert
the
IV
concentration
from
mg
to
mcg.
1
mg
:
1000
mcg
::
10
mg
:
10,000
mcg.
Infusion
rate
(48
ml/hour)
x
concentration
(10,000
mcg/ml)
divided
by
60
minutes/hour
x
80
kg
=
48
x
10,000
divided
by
60
x
80
=
480,000
/
4800
=
100
mcg/kg/minute.
The
nurse
is
preparing
the
change-of-shift
report
for
a
client
who
has
a
265
ml
secondary
infusion
that
was
started
2
hours
ago
at
a
rate
of
85
ml/hour
via
an
infusion
pump.
The
nurse
should
report
that
how
many
ml
remain
to
be
infused
by
the
on-coming
nurse?
(Enter
numeric
value
only.)
-
ANS
95
85
ml
x
2
hours
=
170
ml
has
infused.
265
ml
(total
amount
to
be
infused)
-
170
ml
(amount
infused)
=
95
ml
remain
to
be
infused.
A
male
client
receives
a
prescription
for
ondansetron
hydrochloride
(Zofran)
4
mg
IV
to
prevent
postoperative
nausea
after
an
inguinal
hernia
repair.
The
medication
is
available
in
2
mg/ml.
How
many
ml
should
the
nurse
administer?
(Enter
numeric
value
only.)
-
ANS
2
Use
ratio
and
proportion,
4
mg
:
X
ml
=
2
mg
:
1
ml
2X
=
4
X
=
2
The
nurse
is
preparing
to
administer
Hepatitis
B
Vaccine,
Recombinant
(Energix-B)
5
mcg
IM
to
a
school-aged
child.
The
vaccine
is
labeled,
10
mcg/ml.
How
many
ml
should
the
nurse
administer?
(Enter
numeric
value
only.
If
rounding
is
required,
round
to
the
nearest
tenth).
-
ANS
1
or
0.5
Use
ratio
and
proportion,
5
mcg
:
X
ml
::
10
mcg
:
1ml
10X
=
5
X
=
0.5
ml
A
client's
daily
PO
prescription
for
aripiprazole
(Abilify)
is
increased
from
15
mg
to
30
mg.
The
medication
is
available
in
15
mg
tablets,
and
the
client
already
received
one
tablet
today.
How
many
additional
tablets
should
the
nurse
administer
so
the
client
receives
the
total
newly
prescribed
dose
for
the
day?
(Enter
numeric
value
only.)
-
ANS
1
30
mg
(total
dose)
-
15
mg
(dose
already
administered)
=
15
mg
that
still
needs
to
be
administered.
Using
the
Desired/Have
formula:
15
mg/15
mg
=
1
tablet
At
the
end
of
the
shift,
the
nurse
is
recording
the
fluid
balance
for
a
client
receiving
a
continuous
gastrostomy
tube
(GT)
feeding.
Based
on
the
client's
records,
how
many
ml
should
the
nurse
record
for
the
total
fluid
balance
(intake
-
output)
for
the
shift
that
started
at
0700
and
ended
at
1900?
(Enter
numeric
value
only.)
(Click
on
each
image
asset
for
additional
information.)
-
ANS
695
The
tube
feeding
is
administered
at
75
ml/hour
for
11
hours
(0700
-
1800)
and
then
turned
off
for
one
hour
because
the
residual
is
greater
than
200
ml.
11
hours
x
75
ml/hr
=
825
ml.
Three
doses
of
20
ml
of
medication
are
administered,
with
10
ml
of
water
used
to
flush
the
GT
before
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