Blood Urea Nitrogen Increased: Causes & Reasons

Possible Causes for Blood Urea Nitrogen Increased

Increased blood urea nitrogen (BUN) may be due to prerenal causes (cardiac decompensation, water depletion due to decreased intake and excessive loss, increased protein catabolism [mayomedicallaboratories.com]

[…] in both the blood urea nitrogen (bun) and creatinine values. urine specific gravity is usually normal. postrenal azotemia, however, can progress to intrinsic renal disease [proprofs.com]

All three categories can lead to a dangerous increase in your blood urea nitrogen (BUN) along with other compounds that are normally expelled in your urine. [healthool.com]

Prerenal Azotemia

By definition, prerenal azotemia is associated with an increase in blood urea nitrogen (BUN) and serum creatinine levels. [symptoma.com]

nitrogenous waste products, ie urea and creatinine, in the blood. [vetstream.com]

Senior-Løken Syndrome

blood urea nitrogen * Increased blood creatinine level * Thickening of kidney filtration tissues * Endstage kidney disease * Polyuria * Enuresis * Inability to concentrate [checkorphan.org]

Metabolic acidosis Thickening of kidney filtration tissues Increased blood creatinine level Increased blood urea nitrogen Retinitis pigmentosa Progressive vision loss Blindness [disabilitycasereview.com]

Loken Syndrome * Thirst * Excessive urination * Mental retardation * Progressive vision loss * Blindness * Arterial hypertension * Tubulointerstitial nephropathy * Anemia * Increased [checkorphan.org]

Myeloma Kidney

Blood urea nitrogen, or BUN Blood urea nitrogen (BUN) is a measurement of a waste product that accumulates in the blood. [myeloma.org]

When the body breaks down proteins, the amount of blood urea nitrogen increases. This increase indicates damage to the kidneys or liver. [myeloma.org]

When the body breaks down proteins, the amount of blood urea nitrogen increases, indicating if the kidneys or liver are damaged. [myeloma.org]

Acute Kidney Injury

Worsening renal function results in the accumulation of blood urea nitrogen (BUN), increased electrolytes, and acid-base abnormalities, which can lead to symptoms such as [todaysgeriatricmedicine.com]

Introduction Acute renal failure (ARF) is defined as an acute decline in renal function characterized by an increase in blood urea nitrogen (BUN) and serum creatinine values [pedsinreview.aappublications.org]

urea nitrogen (bun) and serum creatinine concentrations. [icd9data.com]

Renal Function Impairment

Blood urea nitrogen and creatinine increased in 1 patient. B-ultrasound revealed bilaterally enlarged kidneys in 3 patients. [ncbi.nlm.nih.gov]

Levels of ApoA4 were positively correlated with blood urea nitrogen and creatine, but negatively correlated with serum protein and albumin. [ncbi.nlm.nih.gov]

In patients without renal failure at enrollment, renal impairment was diagnosed when the blood urea nitrogen or serum creatinine level increased by more than 50 percent of [nejm.org]

Tumor Lysis Syndrome

 Increases in blood urea nitrogen and creatinine levels occur as a result of renal impairment associated with acute uric acid crystal nephropathy, calcium-phosphate crystals [slideshare.net]

Cardiac manifestations may include asystole, ventricular tachycardia or fibrillation, syncope, and possible sudden death.5,15 Increases in blood urea nitrogen and creatinine [haematologica.org]

High blood urea nitrogen (BUN) levels due to increased protein catabolism and renal impairment can be severe enough to result in pericarditis, platelet dysfunction, and defective [emedicine.com]

Renal Amyloidosis

[…] with an increase in 24-hour protein excretion and blood urea nitrogen (p=0.119 and 0.184, respectively). [ncbi.nlm.nih.gov]

Results In simple regression analysis, 24-hour protein excretion, serum blood urea nitrogen and eGFR were found to significantly correlate with the increased extent of glomerular [pmj.bmj.com]

RESULTS: In simple regression analysis, 24-hour protein excretion, serum blood urea nitrogen and eGFR were found to significantly correlate with the increased extent of glomerular [ncbi.nlm.nih.gov]

Acute Glomerulonephritis

Laboratory Assessment for a patient with Acute GN Blood urea nitrogen (BUN) increased (older pt's it may be higher); Protein excretion rate increased from 500 mg to 3 g/24 [quizlet.com]

Diagnostic Tests Urinalysis Hematuria (microscopic or gross), proteinuria, sediment, RBC casts Blood chemistry Increased blood urea nitrogen, serum creatinine, and serum lipid [medi-info.com]

Due to this, waste in the blood build-ups (remember the kidneys are NOT filtering normally) and this increases the blood urea nitrogen (BUN) and creatinine levels. [registerednursern.com]

Hypovolemia

Hypovolemia lab values These are the changes you will encounter in the lab tests for hypovolemia: Sodium excretion increased Specific gravity increased BUN (blood urea nitrogen [byebyedoctor.com]

blood urea nitrogen or creatinine levels), cardiac complications (dysrhythmias, cardiac failure), pulmonary failure (PaO 2 < 60 mm Hg, PCO 2 > 55 mm Hg, increased alveolar [scielo.br]

increased – demonstrates kidney function Hct (hematocrit) increased Osmolality ICF volume increased ECF volume decreased Potassium decreased. [byebyedoctor.com]

Cholesterol Embolism

Blood urea nitrogen (BUN) subsequently increased to 15.0 μ mol/l and serum creatinine to 274.0 μ mol/l over the normal values within 2 months after PTCA. Fig. 1. [medicaljournals.se]

[…] creatinine and blood urea nitrogen. [casereports.bmj.com]

Additionally, serum chemistry is important as increased blood urea nitrogen (BUN) and creatinine concentrations are ubiquitously observed in these patients. [symptoma.com]

Hepatorenal Syndrome

After transjugular intrahepatic portosystemic shunt, serum creatinine, blood urea nitrogen, serum sodium, sodium excretion, and urine volume were significantly improved; by [ncbi.nlm.nih.gov]

In patients without renal failure at enrollment, renal impairment was diagnosed when the blood urea nitrogen or serum creatinine level increased by more than 50 percent of [dx.doi.org]

[…] comparison, serum bilirubin slightly increased, but the difference was not statistically significant. [ncbi.nlm.nih.gov]

Hypertensive Encephalopathy

[…] vessels of the retina and swelling of the optic nerve Order blood and urine tests that may include: Blood urea nitrogen (BUN) and creatinine levels, which increase if you [webmd.com]

[…] malignant hypertension, the doctor will: Recheck your blood pressure and listen to your heart and lungs for abnormal sounds Examine your eyes to check for damage to the blood [webmd.com]

[…] have kidney damage Blood clotting tests Blood sugar (glucose) level Complete blood count Sodium and potassium levels Urinalysis to check for blood, protein, or abnormal hormone [webmd.com]

Uremic Pneumonitis

It is an ammonia odour in the mouth caused by the high concentration of urea in the saliva which subsequent breakdown to ammonia.[10] As the blood urea nitrogen (BUN) level [en.wikipedia.org]

The authors conclude that “initiation of dialysis at higher BUN [blood urea nitrogen] concentrations was associated with an increased risk for death.” [cjasn.asnjournals.org]

The blood urea nitrogen had risen to 54.5 mg. per cent. The carbon dioxide combining power had declined to 37.2 volumes per cent. [dokumen.tips]

Chronic Kidney Insufficiency

There may also be an increase of acid in the blood. Blood urea nitrogen test Blood urea nitrogen can become elevated when your kidneys start to fail. [healthline.com]

urea nitrogen, are unable to identify which individuals will progress and do not provide insight on underlying causal pathways. [karger.com]

Table 4 Panel of metabolite markers of renal metabolic function and rapid CKD progression in CRIC Discussion Current blood markers of CKD, that is, serum creatinine and blood [karger.com]

Preeclampsia

These substances, which include blood urea nitrogen and creatinine, increase in the blood if the kidneys have been damaged. [cigna.com]

These tests check the amount of certain substances found in the blood that are normally removed from the body by the kidneys. [cigna.com]

Dehydration

Other laboratory abnormalities in dehydration include relative polycythemia resulting from hemoconcentration, elevated blood urea nitrogen (BUN), and increased urine specific [merckmanuals.com]

Serum osmolality, electrolytes, and blood urea nitrogen to creatinine (BUN:Cr) ratio were used to identify dehydration. [ncbi.nlm.nih.gov]

Moreover, dehydration (defined as increased serum osmolality) was significantly more common in patients in institutional care than home care (51% versus 41.3%, respectively [ncbi.nlm.nih.gov]

Acute Tubular Necrosis

urea nitrogen and creatinine urine tests since both levels increase with kidney failure biopsy to examine your kidney tissue blood tests to measure sodium and creatinine [healthline.com]

[…] in the blood levels of blood urea nitrogen (BUN) and creatinine Acute Tubular Necrosis (ATN) is a form of acute kidney injury, in which the cells of the tubule are damaged [dovemed.com]

The initiation phase is characterized by an acute decrease in glomerular filtration rate (GFR) to very low levels, with a sudden increase in serum creatinine and blood urea [emedicine.com]

Allergic Interstitial Nephritis

The most important diagnostic modalities are lab tests (increased blood urea nitrogen and creatinine ) and urinalysis, although a kidney biopsy may be indicated in select [amboss.com]

Nephrocalcinosis

Clinical features of microscopic nephrocalcinosis include Reduced concentration capacity, Increased blood urea nitrogen (BUN), Prolongation of nephron transit time in the [omicsonline.org]

Diabetic Nephropathy

as a result, serum creatinine and urea nitrogen levels are slightly reduced. [medical-dictionary.thefreedictionary.com]

Taxus chinensis significantly improved the renal damage, which was indicated by the decreases in 24-h urinary albumin excretion rate, blood serum creatinine, and blood urea [ncbi.nlm.nih.gov]

The kidneys increase in size and weight because of both hypertrophy and hyperplasia of parenchymal cells, and renal blood flow and glomerular filtration rate (GFR) are increased [medical-dictionary.thefreedictionary.com]

Glomerulonephritis

Increased circulating toxins, blood urea nitrogen and creatinine, and activation of the renin-angiotensin system occur resulting in hypertension.Metabolic acidosis (MA), low [symptoma.com]

Urinalysis might also show white blood cells, increased protein. [thehopenewspaper.com]

[…] test Blood urea nitrogen (BUN) and creatinine levels Special blood tests to detect abnormal immune functions such as autoantibodies and complement level testing 24-hour urine [dovemed.com]

Congestive Heart Failure

Besides BNP, recommended blood tests include complete blood count, creatinine, BUN (blood urea nitrogen), electrolytes (including magnesium and calcium), glucose, albumin, [msdmanuals.com]

Obesity, which is becoming an increasingly common comorbidity in HF, is associated with reduced BNP production and increased BNP clearance, resulting in lower levels. [msdmanuals.com]

Acute Pyelonephritis

The white blood cell count and blood urea nitrogen level (marker of kidney function) are usually increased. [msdmanuals.com]

If the person has had other flare-ups (bouts or attacks) of pancreatitis, however, the levels of these enzymes may not increase significantly, because so much of the pancreas [msdmanuals.com]

Gastrointestinal Hemorrhage

Laboratory evaluation was significant for hemoglobin (Hgb), 15.0 g/dL; blood urea nitrogen (BUN)-to-creatinine (Cr) ratio, 11.6; and anion gap, 17 mEq/L. [mdedge.com]

Physical examination was notable for no subjective or objective findings of orthostatic hypotension; increased bowel sounds and diffuse mild abdominal tenderness; and no external [mdedge.com]

Malignant Hypertension

[…] vessels of the retina and swelling of the optic nerve Order blood and urine tests that may include: Blood urea nitrogen (BUN) and creatinine levels, which increase if you [webmd.com]

[…] malignant hypertension, the doctor will: Recheck your blood pressure and listen to your heart and lungs for abnormal sounds Examine your eyes to check for damage to the blood [webmd.com]

[…] have kidney damage Blood clotting tests Blood sugar (glucose) level Complete blood count Sodium and potassium levels Urinalysis to check for blood, protein, or abnormal hormone [webmd.com]

Hypovolemic Shock

There is elevated potassium, serum lactate, and blood urea nitrogen levels. Urine characteristics. The urine specific gravity and urine osmolality are increased. [nurseslabs.com]

Decreased in hypovolemic hyponatremia Potassium (K) Chloride (Cl) Blood Urea Nitrogen (BUN) can be increased in dehydration, gastrointestinal bleeding, rhabdomyolysis, urinary [ehealthstar.com]

Blood considerations. Decreased blood pH, partial pressure of oxygen, and increased partial pressure of carbon dioxide. [nurseslabs.com]

Non-Oliguric Renal Failure

Table 13-2: Laboratory Findings in Oliguric Acute Kidney Injury ATN, acute tubular necrosis; BUN, blood urea nitrogen; Cr, creatinine; FENa, fractional excretion of sodium [unboundmedicine.com]

Loop diuretics and metabolic alkalosis can induce natriuresis, increase the FENa, and mask the presence of renal hypoperfusion. [unboundmedicine.com]

Scleroderma with Renal Involvement

There may also be an increase of acid in the blood. Blood urea nitrogen test Blood urea nitrogen can become elevated when your kidneys start to fail. [healthline.com]

Addison Disease

urea nitrogen) > 20 mg/dL (> 7.1 mmol/L) Hematology Hematocrit Elevated White blood cell count Low Lymphocytes Relative lymphocytosis Eosinophils Increased Imaging X-ray [msdmanuals.com]

Replacement doses of hydrocortisone and fludrocortisone are given; doses should be increased during intercurrent illness. [merckmanuals.com]

Low serum sodium, high serum potassium, and high BUN (blood urea nitrogen) occur. Usually, plasma ACTH is high and serum cortisol levels are low. [msdmanuals.com]