Hemodialysis

Access recirculation (urea method)

R = (P − A) / (P − V) × 100, where P=peripheral BUN, A=arterial line, V=venous line.

vascular access

Required inputs

  • Peripheral BUN
  • Arterial line BUN
  • Venous line BUN

Equation or source

Sherman RA. AJKD 1991;17:33.

Provenance and release status

Equation / algorithm
R = (P − A) / (P − V) × 100, where P=peripheral BUN, A=arterial line, V=venous line.
Formula version
recirc-v1
Tool version
2.4.0
Clinical risk class
B. CLINICAL DECISION-SUPPORT CALCULATOR
Release status
Under clinical review
Source status
Direct primary source identifier not yet resolved
Clinical review status
Under clinical verification
Clinical review date
Clinical review date not yet documented

DOI / PMID / direct guideline identifier not yet documented.

Assumptions

  • Entered values and units are accurate and apply to the population described by the cited source.
  • The published equation or rule is being used without a patient-specific clinical adjustment.

Important limitations

  • The result does not replace clinical assessment or establish a diagnosis.
  • Performance outside the source population may differ.
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