The Kidney
Urine Collection
Urine Chemistry
Terminology
Casts
100

Brings blood to the kidney

Renal Artery

100

A sterile urine specimen that is collected by needle aspiration through the abdominal wall into the bladder.

Suprapubic Aspiration

100

The unit that describes the acidity or alkalinity of a urine

pH

100

The presence of hemoglobin in the urine

Hemoglobinuria

100

Casts that contain RBC's, WBC's, or epithelial cells.

Cellular casts

Which picture is a cellular cast?

200

Microscopic filtering units in the kidney

Nephrons

200

A urine test that could be used in the court of law.

Chain of Custody

200

Normal products of fat metabolism that are normally not found in the urine.

Ketones

200

Caused by traumatic muscle injuries or beating/crushing injuries

Myoglobinuria

200

The least clinically significant casts and may increase in mild kidney irritation due to dehydration or physical exercise.

Hyaline casts

Which picture is a hyaline cast?

300

Bundle of capillaries that filter water, mineral salts, glucose, and metabolic products out of the blood.

Glomerulus

300

The preferred specimen for a urine culture.

Midstream Clean Catch

300

The measurement of the amount of dissolved substances in a solution compared to distilled water

Specific Gravity

300

The presence of white blood cells in the urine.

Pyuria

300

The most serious casts clinically and can indicate a shutdown of a portion of the kidney

Waxy cast

Which picture is a waxy cast?

400

The C-shaped structure surrounding the glomerulus

Bowman's Capsule

400

A urine specimen that is obtained when a patient is confined to bed or cannot urinate independently

Catheterized urine

400

The most significant result in detecting and diagnosing renal disease and is the matrix that is used to form casts.

Protein

400

The presence of red blood cells in the urine.

Hematuria

400

Casts that are a result of broken down cells within the cast or renal tubule

Granular cast

500

Substances the body needs are reabsorbed here

Proximal Convoluted Tubule

500

The urine is more concentrated in this specimen because it has been in the bladder for an extended period. This is usually collected for pregnancy tests.

First morning urine

500

This test will be positive if granulocytic white blood cells are present

Leukocyte esterase

500

The presence of glucose in the urine

Glycosuria

500

Indicate serious renal conditions that affect the glomerulus, They are fragile and often seen in fragments.

RBC cast