Ammonium Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Ammonium and links to relevant pages within the course.
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| False Positive Protein Results A urine specimen that has remained at room temperature for an extended period of time may produce a false-positive protein result on a reagent strip. A false positive may also occur in the presence of bacterial contamination, alkaline medication, or quaternary ammonium compounds such as disinfectants or drugs, and with skin cleansers containing chlorhexidine. | View Page |
| Which one of the following crystals is not found in normal urine: | View Page |
| Identify the urine sediment elements indicated by the arrow in the illustration: | View Page |
| Identify the sediment elements present in this alkaline urine: | View Page |
| Match the urine sediment or crystal to the correct description. | View Page |
| Discussion The phlebotomist should always carefully observe the patient for clues about his mental and physical condition. In this case, the patient verbally expressed her fear of needles. In other cases, such fear may be expressed on the patient’s face or through other clues. It may help to engage apprehensive patients in conversation during the venipuncture to keep their mind off the procedure.As soon as the patient stated that she felt faint, the procedure should have been terminated. If a sitting patient faints, placing her head between her knees will help to revive her. Make sure the patient does not injure herself. Ammonium (smelling) salts, if in use at your institution, should be used cautiously, since they can be irritating. Get help from the nursing staff or a physician. Stay with the patient at least 15 minutes. The patient should not leave the area for at least 30 minutes. Make sure other appropriate institutional procedures are followed after fainting.Relevant topics:Fainting, Fainting continued | View Page |
| What should the phlebotomist do now? | View Page |
| Fainting continued If a patient faints during venipuncture: Gently remove the tourniquet and needle from the patients arm, apply gauze and pressure to the skin puncture site.
Call for help. If the patient is seated, place his head between his knees. A cold compress on the back of the neck or ammonium salts may help to revive the patient more quickly. | View Page |
| What element is present in this slide? | View Page |
| What element is present in this slide? | View Page |
| True or false? Ammonium biurate 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 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 |
| Ammonium Biurate Crystals Ammonium biurate crystals commonly occur in the form of "thorn apples," as shown here, or in polyhedral shapes. They are deeply colored from a dark yellow to brown. They sometimes appear in clumps or clusters. This crystal occurs only in stale urine. | View Page |
| Which of the following may be found in normal alkaline urine? | View Page |
| Please identify these crystals. | View Page |
| Which of the following may be found in normal acid urine? | View Page |