Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
Given the following lab results, what is the most likely cause of this patient's BUN? BUN 45 mg/dL Creatinine 1.8 mg/dL Uric Acid 7 mg/dL pH 7.22 pC02 74.4 mm Hg p02 32.8 mm Hg 02 sat.51.3%
|
congestive heart failure |
|
You just received a blood specimen from the emergency room. According to the requisition, the patient had overdosed on an antacid medication containing bromide salts. You have been asked to run a STAT set of electrolytes on the serum. Which electrolyte would most likely be falsely elevated?
|
Chloride
|
|
When blood is drawn into a Vacutainer tube and allowed to clot, if the serum is not separated from the cells, the serum potassium will tend to decrease and the serum sodium will tend to increase.
|
False
|
|
One cause for a DECREASED "anion gap" is:
|
A decrease in albumin
|
|
The membrane substance used in the potassium ion-selective electrode is:
|
Valinomycin
|
|
An electrolyte panel was performed on a patient in the emergency room. The following values were reported: Sodium: 150 mEq/L Potassium: 5 mEq/L Chloride: 110 mEq/L Bicarbonate: 30 mEq/L The anion gap (without using K) for this patient is:
|
10 meq/L
|
|
May Serum uric acid levels be elevated in patients undergoing cancer chemotherapy?
|
True
|
|
Describe the best and correct collection and handling conditions for a blood ammonia measurement.
|
Draw heparin tube, keep on ice, separate cells from plasma, refrigerated centrifuge, freeze plasma if testing is delayed
|
|
Describe everything about Urea:
|
Synthesized from Co2 and ammonia
|
|
A toxic condition involving a very high serum level of urea and accompanied by failure of the three main functions of the renal system is referred to as:
|
Uremia
|
|
Azotemia refers to:
|
Abnormally high urea and blood
|
|
The major causes of decreased plasma urea concentration include:
|
Decreased protein and severe liver disease
|
|
Is the main function of antidiuretic hormone to increase the reabsorption of sodium and increase the secretion of potassium?
|
False
|
|
The sweat test for chloride is used as a screening test for:
|
Cystic fibrosis
|
|
Which electrolyte(s) would be increased in the serum if the blood specimen was hemolyzed?
|
Potassium and phosphate
|
|
Does the enzymatic method for creatinine on the Vitros (Kodak Ektachem) analyzer use the reagent enzyme creatinine amidohydrolase?
|
True
|
|
Interferences with coupled colorimetric methods for uric acid in serum can be minimized by the preparation of:
|
Potassium ferricyanide
|
|
How can Urea be measured?
|
Ph indicator. reference isotope dilution, mass spectrometry, color change, ammonium ions generated by something leading to a change
|
|
Are serum urea levels less affected by diet and metabolism than are serum creatinine levels?
|
False
|
|
Does the enzymatic urea methods begin with the hydrolysis of urease?
|
Yes
|
|
A patient brought to the emergency room has the following laboratory results: sodium = 140 mmol/L glucose = 80 mg/dL BUN = 6.0 mg/dL osmolality = 316 mosm/Kg H20 The calculated osmolality on this patient using the Weisberg formula is:
|
286
|
|
A patient brought to the emergency room has the following laboratory results: sodium = 140 mmol/L glucose = 80 mg/dL BUN = 6.0 mg/dL osmolality = 316 mOsm/Kg H20 What does the "osmolal gap" suggest?
|
Ethynol intoxication or other substances
|
|
Hypernatremia commonly occurs in:
|
Burns and excessive sweating without water intake
|
|
Hyperkalemia occurs in:
|
dehydration, primary indrenal, diabetes militates
|
|
A low plasma osmolality and low sodium would be expected in a patient with:
|
SLADH
|