Cast Flashcards
Elements that is unique to the kidney.
Formed within distal convoluted tubules and collecting ducts.
Casts
Examination of cast
Using low power magnification
Dissolves quickly in dilute, alkaline urine
Cast matrix
Manner of reporting of cast
Average number per 10 lpfs
Major constituent of casts, cannot detected by reagent strip
Uromodulin
Formation of casts at the junction of ascending loop of Henley and the DCT may produce structures with a tapered ends
Cylindroids
Presence of urinary casts
Cylindruria
Any elements present in the tubular filtrate, including cells, bacteria, granules, pigments, and crystals, may become embedded in or attached to the _______
Cast matrix
Most frequently seen cast
Hyaline casts
Consists of almost entirely of uromodulin
Hyaline cast
Normal range of hyaline cast
0-2/lpf
Increased finding of hyaline cast
-strenuous exercise
-heat exposure
-emotional stress
-dehydration
Pathologic increase of hyaline cast
-acute glomerulonephritis
-pyelonephritis
-chronic renal disease
-congestive heart failure
Appearance of hyaline cast
Colorless in unstained sedmiments
Stain that produces pink color in hyaline cast
Sternheimer-Malbin stain
Microscope used to increase visualization of hyaline cast
Phase microscope
Morphology of hyaline cast that indicates aging of cast matrix
-Normal parallel sides
-rounded ends
-cylindroid forms
-wrinkled or convoluted shapes
Showing bleeding within the nephron
RBC cast
Indicates bleeding from an area within the genitourinary tract
RBC cast
RBC casts associated with glomerular damage are usually associated with ________
Proteinuria
Cell lysis begins and the cast develops more homogenous appearance
Aging of RBC cast
Manner of reporting of RBC cast
Number of RBC casts per lpf
The appearance of this cast signifies that urine has infection or inflammation within nephron.
WBC cast
