FEurea: Calculate the fraction of excreted urea

In CCVR/inteRn: What the package does (short line)

Description

Calculate the function of excreted urea to assess the etiology of kidney injury in a patient who is been administered diuretics.

Usage

FEurea(
  serum.creatinine = 1,
  urine.urea = 1,
  serum.urea = 1,
  urine.creatine = 1
)

Arguments

serum.creatinine	Numerical value. Serum creatinine reported in BMP or CMP.
urine.urea	Numerical value. Urine urea reported in a lab (urea urine spots).
serum.urea	Numerical value. Serum BUN reported in BMP or CMP.
urine.creatine	Numerical value. Urine creatinine reported in a lab (creatinine urine spots).

Value

Returns a percentage corresponding to the fraction of excreted sodium.

Author(s)

Carlos C Vera Recio

References

Kaplan, A A, and O F Kohn. “Fractional excretion of urea as a guide to renal dysfunction.” American journal of nephrology vol. 12,1-2 (1992): 49-54. doi:10.1159/000168417

Examples

FEurea(
  serum.creatinine = 1,
  urine.urea = 1,
  serum.urea = 1,
  urine.creatine = 1
)

## The function is currently defined as
function (serum.creatinine = 1, urine.urea = 1, serum.urea = 1, 
    urine.creatine = 1) 
{
    guide = list(
      `Pre-renal` = 35,
      `Intrinsic renal` = 50
    )
    feurea = 100 * ((serum.creatinine * urine.urea)/(serum.urea * 
        urine.creatine))
    interpretation = if (feurea > 50) {
        "Intrinsic Renal"
    }
    else if (feurea <= 35) {
        "Prerenal"
    }
    else {
        "not conclusive"
    }
    res = list(
      `fraction of excreted urea` = feurea,
      interpretation = interpretation
    )
    return(res)
  }

CCVR/inteRn documentation built on Dec. 17, 2021, 12:51 p.m.