Urine analysis- week 1 Flashcards
What are the 3 parts of a complete UA?
Physical exam
Chemical Exam
Microscopic exam
What makes up the UA physical exam?
Color, clarity, odor
What makes up the UA chemical exam?
Dipsticks
Abnormal UA physical exam color indicates what?
Milky
Pus, bacteria, Fat
possible infection
Abnormal UA physical exam color indicates what?
Red/Smoky Brown
Blood
Abnormal UA physical exam color indicates what?
Yellow Foam
Bile pigments (liver), Gal Stone, or cholecystitis (gal bladder inflammation)
Abnormal UA physical exam color indicates what?
White Foam
Albumin
Regular in small amounts
Large amount is an issue
Abnormal UA physical exam color indicates what?
Coca-Cola color?
AGN from blood in the early stages of filtration
Can also be from Strep infection
Urine color can be affected by what things that do not indicate an issue?
Dehydration or supplements
Odor in the physical exam is caused by what if it smells like ammonia or cleaning products?
Bacterial decomp due to urine retention
Odor in the physical exam is caused by what if it smells fruity?
Ketone bodies- DM
Odor in the physical exam is caused by what if it smells Stale?
Advanced Kidney Disease
What is the WNL of urine specific gravity?
1.003-1.030
What does it indicate when the specific gravity of urine is low?
Excessive hydration; diabetes insipidus
What does it indicate when the specific gravity of urine is high?
Dehydration; Diabetes Mellitus
What if the specific gravity of urine is fixed at ~1.010?
Advanced kidney failure
A UA pH below 4.5 indicates?
acidosis, fever, high protein diet
A UA pH above 8 indicates?
Alkalosis, cystitis
Proteinuria indicates? What is the dipstick to indicate this sensitive to?
renal disease; Albumin
What is the most common cause of functional proteinuria?
Orthostatic proteinuria
If proteinuria is prerenal/before kidney what does it indicate
Fever, hypertension, or renal hypoxia
If proteinuria is renal what does it indicate?
Glomerular nephritis, nephrotic syndrome
if proteinuria is postrenal what does it indicate?
Cystitis, prostatitis, urethritis, inflammatory conditions
What is the normal renal threshold for serum glucose before you see reducing sugars in the urine?
180mg/dL
Glycosuria w/o hyperglycemia indicates?
Pregnancy
Glycosuria w/hyperglycemia indicates?
DM
What are the causes of Ketonuria?
DM type 1, Starvation/Ketogenic diet, Severe dehydration
Fever in kids
Hematuria indicates what?
Bleeding due to trauma or irritation, kidney stone
Hemoglobinuria (lysed RBCs in urine) indicates?
UTI, intravascualr hemolysis, or transfusion reacitions
Myoglobinuria indicates?
Rhabdomyolysis, hypothermia, convulsions, extensive physical exertion
What can give you a false NEGATIVE on blood in urine dipstick test?
high dose vitamin C
Presence of WBCs in urine?
Pyuria
Nitrituria indicates?
nitrates in urine, Bacteria/UTI
MC is e. coli
What are the most common causes of Bilirubinuria?
Cholelithiasis (biliary tract obstruction) & liver disease
Why will conjugated bilirubin show up in urine but not unconjugated?
Unconjugated is not water soluble
WBC casts indicate?
WBCs originating in the kidney; Pathognomonic Pyelonephritis
> 5 HPF indicates?
Clinically significant pyuria
RBC casts indicate?
AGN
Fatty casts indicate?
Advanced renal disease, nephrotic syndrome
Waxy casts indicate?
Advanced renal failure