_id

683a1654c782e11e38d1b35a

id

10501

title

BUN Creatinine Ratio

full_title

BUN Creatinine Ratio

short_title

BUN Creatinine Ratio

med_description

Measures renal function.

short_description

Measures renal function.

slug

bun-creatinine-ratio

description

The BUN Creatinine Ratio measures renal function.

keywords

BUN Creatinine Ratio, BUN, creatinine, renal function, bun cr, bun cr ratio, renal dysfunction, chronic renal disease, renal disease, renal failure, acute renal dysfunction, acute kidney disease

complaint

[ "Anuria", "Chest Pain", "Extremity Edema", "Fatigue", "Loss of Appetite", "Nausea", "Peripheral Edema", "Polyuria", "Shortness of Breath", "Swelling", "Vomiting" ]

formula

BUN creatinine ratio = (blood urea nitrogen, mg/dL)/(serum creatinine, mg/dL)

evidence

measurements

[ { "name": "Creatinine", "unit": "cr", "error_min": "0.01", "error_max": "40", "warn_min": "0", "warn_max": "10", "conversion": "88.4", "normal_max_si": "115", "normal_max_us": "1.3", "normal_min_si": "62", "normal_min_us": "0.7", "units_si": "µmol/L", "units_us": "mg/dL" }, { "name": "BUN", "unit": "bun", "error_min": "1", "error_max": "500", "warn_min": "2", "warn_max": "300", "conversion": "0.357", "normal_max_si": "7.1", "normal_max_us": "20", "normal_min_si": "2.9", "normal_min_us": "8", "units_si": "mmol/L", "units_us": "mg/dL" } ]

information

refrences

{ "Clinical Practice Guidelines": [ { "href": "https://kdigo.org/wp-content/uploads/2017/02/KDIGO_2012_CKD_GL.pdf", "text": "KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney International Supplements. 2013;3(1):1-150." }, { "href": "https://kdigo.org/wp-content/uploads/2016/10/KDIGO-2012-AKI-Guideline-English.pdf", "text": "KDIGO Clinical Practice Guideline for Acute Kidney Injury. Kidney International Supplements. 2012;2(1):1-138." } ], "Manufacturer Website": [], "Original/Primary Reference": [], "Other References": [ { "href": "https://www.ncbi.nlm.nih.gov/books/NBK538145/", "text": "Tyagi A, Aeddula NR. Azotemia. In: StatPearls. StatPearls Publishing; 2024." } ], "Outcomes": [], "Validation": [], "Validations": [] }

pearls

usecase

Utilize as part of a workup for renal disease.

reasons

next_advice

next_actions

next_management

  • Normal BUN:Creatinine ratio values are generally 10-20. 
  • If BUN:Cr >20, this may be a sign of prerenal azotemia. If clinically appropriate, consider additional workup to determine cause. 
  • BUN can be impacted by other physiologic processes outside of the kidney; a BUN value alone should not be used as the sole  indicator of renal health.

diseases

[ "Chronic Kidney Disease", "Kidney Failure", "Renal Failure" ]

input_schema

{ "conditionality": null, "default": null, "fhir_rules": null, "inct": null, "label_en": "<p>BUN</p>", "name": "bun", "optional": false, "tips_en": "", "type": "textbox", "unit": "bun" }

{ "conditionality": null, "default": null, "fhir_rules": null, "inct": null, "label_en": "<p>Creatinine</p>", "name": "cr", "optional": false, "tips_en": "", "type": "textbox", "unit": "cr" }

[ { "conditionality": null, "default": null, "fhir_rules": null, "inct": null, "label_en": "<p>BUN</p>", "name": "bun", "optional": false, "tips_en": "", "type": "textbox", "unit": "bun" }, { "conditionality": null, "default": null, "fhir_rules": null, "inct": null, "label_en": "<p>Creatinine</p>", "name": "cr", "optional": false, "tips_en": "", "type": "textbox", "unit": "cr" } ]

instructions

published

2024-01-26T20:40:16.217Z

purpose

[ "Formula" ]

search_terms

[ "BUN Creatinine Ratio", "BUN", "creatinine", "renal function", "bun cr", "bun cr ratio", "renal dysfunction", "chronic renal disease", "renal disease", "renal failure", "acute renal dysfunction", "acute kidney disease" ]

seo

{ "keywords_en": "BUN Creatinine Ratio, BUN, creatinine, renal function, bun cr, bun cr ratio, renal dysfunction, chronic renal disease, renal disease, renal failure, acute renal dysfunction, acute kidney disease", "meta_description_en": "The BUN Creatinine Ratio measures renal function." }

specialty

[ "Critical Care", "Emergency Medicine", "Hospitalist Medicine", "Internal Medicine", "Nephrology" ]

departments

[ "Renal" ]

tags

[]

version_number

1

versions

[]

related

[ { "calcId": 3939, "short_title_en": "CKD-EPI Equations for GFR", "slug": "ckd-epi-equations-glomerular-filtration-rate-gfr" }, { "calcId": 10533, "short_title_en": "International IgA Nephropathy Prediction Tool", "slug": "international-iga-nephropathy-prediction-tool" }, { "calcId": 10045, "short_title_en": "Kidney Failure Risk Calculator", "slug": "kidney-failure-risk-calculator" } ]

ismed

false

section

[ "whenToUseViewed", "nextStepsViewed", "evidenceViewed" ]

cleaned_departments

[ "urology" ]

cleaned_use

[ "Utilize as part of a workup for renal disease." ]

pub

false

<p>BUN</p>
<p>Creatinine</p>