Homework Chapter 9

According to CAP guidelines, drugs that interfere with blood tests should be stopped

4 to 24 hours prior to the test

Which of the following tests is affected the most if collected from a crying infant?

WBC count

Which of the following specimens would most likely be rejected for testing?

a hemolyzed potassium specimen

A patient's arm is in anatomical position. There appears to be a loop under the skin between the wrist and the elbow. You feel a buzzing sensation when you touch it. What you are most likely feeling is

an AV graft

A patient has had a mastectomy on the left side and has an IV midway down the right arm. Where is the best place to perform a venipuncture?

below the IV on the right arm

Which activity is least likely to lead to failure to draw blood

choosing a vein that has patency

Which activity can contaminate a blood specimen and affect the testing performed on it?

cleaning the site with alcohol before drawing an ETOH specimen, collecting blood cultures before the povidone-iodine is totally dry, using povidone-iodine to clean the site prior to a finger puncture

Which of the following specimen conditions wold lead you to suspect that the patient was not fasting when it was collected?

cloudy white serum

Results of this test have a direct correlation with the patient's age

creatinine clearance

A phlebotomist needs to collect a plasma specimen for a coagulation test. The patient has an IV in the left arm near the wrist an a hematoma in the antecubital area of the right arm. Which of the following is the best place to collect the specimen?

distal to the hematoma

Which of the following is the most likely to affect test results?

edema

Blood loss to a point where life cannot be sustained is called

exsanguination

Underfilling this tube will most likely result in a hemolyzed specimen

gray top

A hematoma may result from

inadequate site pressure applied after a venipuncture, needle penetration through the back wall of the vein, using a needle that is too large for the size of the vein

The best way to keep a vein from rolling is to

make certain to anchor it well

The serum or plasma of a hemolyzed specimen would most likely look

pinkish to red

While you are in the middle of drawing a blood specimen, your patient starts to faint. The first thing you should do is

quickly release the tourniquet and remove the needle

The medical term for fainting is

syncope

Which of the following is a clue that you have accidentally punctured an artery instead of a vein?

the blood spurts into the tube

You insert the needle in a patient's arm and properly engage the tube. No blood flows into the tube. You make subtle needle adjustments and there is still no blood flow. Which of the following is the best thing to do next?

try a new tube in case it is a vacuum problem