microscopy final

In the hospital where you work, nurses draw bloods from all patients and send them to the lab with test requisitions. You notice a high incidence of hemolyzed specimens being sent from the ER. What is this possible type of error?

preanalytical

You are doing the urinalysis duties for the day. According to laboratory procedure, you run the two control urines first. The results are OK for the normal control. For the glucose, you are getting negative results on your abnormal control, and it should be 3+ positive. You review all your reagents and controls to make sure they are in date and that they appear to be OK. You review the procedure and see that you performed the test accordingly. You repeat the same abnormal control and again get a negative result. What is the NEXT step you should take?

obtain a new control sample and repeat the test on it

the best specimen for urine culture and sensitivity is

mid stream clean catch

A urine is sent to the laboratory for analysis. When performing the reagent dipstick, the following results are obtained. What is the most probable source of error? (3,6,II)
Glucose – negative;
Blood – negative;
Protein – negative;
Bilirubin – negative;
Urobilinogen – normal;
pH – 9.0;
Specific Gravity – 1.020;
Ketones – negative;
Leukocyte Esterase – negative;
Nitrite – positive

the urine was held at room temperature for several hours