Oxalate Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Oxalate and links to relevant pages within the course.
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| Identify the urine sediment elements shown by the arrow: | View Page |
| Which one of the following crystals is not found in normal urine: | View Page |
| Which two of the following crystalline elements are found in acid urine: | View Page |
| Which of the following additives should be used for the collection of a sample for blood gas analysis: | View Page |
| Which of the following blood additives is most useful for serum collection: | View Page |
| Gray top tubes Contain an inhibitor of glycolysis, such as sodium fluoride.May also contain an anticoagulant such as potassium oxalate.
Used for accurate determination of glucose levels.
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| Collection tubes Blood may be collected into either:Red top (clot) tubes.Speckle top tubes (serum separator tube).Gray top tubes specifically designed to preserve glucose levels.
Gray top tubes contain additives such as sodium fluoride or potassium oxalate, which prevent metabolism of glucose by blood cells.
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| Common crystals which can be found in acid urine include:(Choose ALL of the correct answers) | View Page |
| What element is present in this slide? | View Page |
| What element is present in this slide? | View Page |
| What element is present in this slide? | View Page |
| Normal Crystals Normal crystals include uric acid, calcium oxalate, amorphous urates or phosphates, triple phosphate, ammonium biurate and calcium carbonate. | View Page |
| Crystals in Normal Acid Urine Crystals found in normal acid urine include uric acid, calcium oxalate and amorphous urates. This slide shows an example of uric acid crystals. | View Page |
| Crystals in Normal Alkaline Urine Crystals found in normal alkaline urine include triple phosphate, ammonium biurate, calcium carbonate, amorphous phosphates, and calcium oxalate. This slide shows an example of triple phosphate crystals. These may appear as four to six sided prisms resembling coffin lids. They indicate either stasis of the bladder or a stale sample. | View Page |
| Calcium Oxalate Crystals Calcium oxalate crystals have a characteristic octahedral or envelope shape. Fine focusing will cause the "x" to be refractile. Size may vary from extremely small to quite large. They are associated with diets high in oxalic acid or chemical toxicity. Occasionally calcium oxalate crystals are dumbbell or oval in shape. | View Page |
| Please identify these crystals. | View Page |
| Which of the following may be found in normal acid urine? | View Page |
| Platelet satellites (marked in the photograph) may account for low platelet counts as determined by electronic counters. Satellitosis is initiated by: | View Page |