When the nurse notes that the post cardiac surgery patient
demonstrates low urine output (< 25 ml/hr) with high specific
gravity (> 1.025), the nurse suspects:
a) Inadequate fluid volume
Urine output of less than 25 ml/hr may indicate a decrease in cardiac
output. A high specific gravity indicates increased concentration of
solutes in the urine which occurs with inadequate fluid volume.
b) Normal glomerular filtration
Indices of normal glomerular filtration are output of 25 ml or greater
per hour and specific gravity between 1.010 and 1.025.
c) Overhydration
Overhydration is manifested by high urine output with low specific
gravity.
d) Anuria
The anuric patient does not produce urine.
demonstrates low urine output (< 25 ml/hr) with high specific
gravity (> 1.025), the nurse suspects:
a) Inadequate fluid volume
Urine output of less than 25 ml/hr may indicate a decrease in cardiac
output. A high specific gravity indicates increased concentration of
solutes in the urine which occurs with inadequate fluid volume.
b) Normal glomerular filtration
Indices of normal glomerular filtration are output of 25 ml or greater
per hour and specific gravity between 1.010 and 1.025.
c) Overhydration
Overhydration is manifested by high urine output with low specific
gravity.
d) Anuria
The anuric patient does not produce urine.