Mayo Clinic Laboratories does not perform workplace drug testing. In other circumstances where the test results could be challenged in a court of law, a chain of custody process should be utilized.
- Chain of custody starts at the time of initial patient contact. The specimen must be collected under controlled conditions. The collection facility initiates a documentation process that accompanies the specimen to the laboratory. The chain-of-custody process provides:
- Clear and unique identification of the subject being tested
- Clear and unique labeling of the specimen
- Identification of all persons who handle the specimen—legible signature required
- A historical record of events with action dates clearly stated
- Security of the specimen using a sealed, tamper-evident process
Failure to complete the collection process correctly, including labeling of the sample, as well as all details of the accompanying documentation, may result in the inability to process the sample.
A convenient kit is available to facilitate the chain-of-custody process.
When drawing a blood alcohol specimen, it is acceptable to clean the arm with?
A. Benzalkonium chloride
B. isopropyl alcohol
C. methanol prep
D. tincture of iodine
Which of the following is the most critical part of blood culture collection?
A. Adequately filing two media tubes
B. Antisepsis of the collection site
C. Selecting the collection site
D. Timing of the second set of cultures
B. Antisepsis of the collection site
TDM peak concentration may be defined as the?
A. Highest concentration of the drug during a dosing interval
B. Lowest concentration of the drug during a dosing interval
C. Concentration required for maximum drug effectiveness
D. None of the above
A. Highest concentration of the drug during a dosing interval
In performing a glucose tolerance test, the fasting specimen is drawn at 0815 hours and the patient finishes the glucose beverage at 0820 hours. when should the 1 hour specimen be collected?
A. 0915
B.0920
C.0945
D. 0950
A bleeding time test detects?
A. alcohol concentration
B. diabetes mellitus
C. platelet function disorders
D. Septicemia toxins
C. platelet function disorders
Removing a unit of blood from a patient and not replacing it is used as a treatment for?
A. Arthritis
B. Leukemia
C. Polycythemia
D. Tuberculosis
Which of the following test may require special chain of custody documentation when the specimen is collected?
A. blood culture
B. Cross match
C. drug screen
D. TDM
What type of specimen is needed for a guaiac test?
A. Blood
B. Breath
C. Feces
D. Urine
Which of the following test must have a 9:1 ratio of blood to anticoagulant in the collection tube?
A. 2-hour pop
B. Blood culture
C. Electrolytes
D. Protime
Which of the following test is collected in a trace element-free tube?
A. ABGs
B. Aluminum
C. BUN
D. Hemoglobin
Common chemistry tests performed by POCT instruments include?
A. Hgb , Hct
B. Na, K
C. PT, PTT
D. T4, TSH
Which of the following is a test that measures packed cell volume?
A. hCG
B. Hct
C. INR
D.TnT
The fasting specimen for a GTT is drawn?
A. as close to 6 am as possible
B. Before the test actually begun
C. Right after the glucose drink is finished
D. When the timing for the test beings
B. Before the test actually begun
Which of the following tube additives is preferred for the collection of a blood culture specimen?
A. Citrate phosphate dextrose
B. Sodium or potassium heparin
C. Sodium polyanethol sulfonate
D. Potassium oxalate and fluoride
C. Sodium polyanethol sulfonate
TDM trough concentration may be defined as the
A. Highest concentration of the drug during a dosing interval
B. Lowest concentration of the drug during a dosing interval
C. Maximum effectiveness of the drug in the tissue
D. None of the above
B. Lowest concentration of the drug during a dosing interval
In performing glucose tolerance test, the fasting specimen is drawn at 6:15 am and the patient finishes the glucose beverage at 630 am. when sound the 2 hour specimen be collected?
A. 815
B.830
C.915
D.930
A BT using a standardized template device may be performed on the?
A. AC between prominent veins
B. Dorsal surface of the hand
C. Ventral surface of the hand
D. Volar surface of the arm
D. Volar surface of the arm
During a GTT, Which of the following is acceptable?
A. Allowing the patient to drink water at any time during the test
B. Giving coffee to the patient after drawing the fasting specimen
C. Permitting the patient to chew sugarless gum and smoke
D. Timing all specimen collection after the fasting specimen was collected
A. Allowing the patient to drink water at any time during the test
Which of the following test does not require special chain of custody documentation when collected?
A. BAC
B. Drug screen
C. Paternity testing
D. TDM
Which of the following POC tests is used to monitor warfarin therapy?
A. ACT
B. BT
C. INR
D. PTT
Which of the following will prolong the bleeding time test?
A. Low blood pressure
B. Recent aspirin ingestion
C. Improper placement of the lancet
D. A patient who is not fasting
B. Recent aspirin ingestion
Hyperkalemia means?
A. Decreased calcium in the blood
B. Increased calcium in the blood
C. Increased potassium in the blood
D. increased sodium in the blood
C. Increased potassium in the blood
Postprandial refers to?
A. After a meal
B. After fasting for 2 hours
C. Just before eating
D. After medication
which of the following should be removed from a list of test that the i- STAT instrument can measure?
A. CBC,PT
B. Hgb, Hct
C. Gluc,BUN
D. Na,K
Blood levels of this specific analyte begin to ride within 4 hours of a MI?
A. ALT
B. TnT
C. LDL
D. BNP
Autologous donation is performed to?
A. Avoid a transfusion reaction
B. Save time in surgery
C. Correct polycythemia
D. Prevent stress on the heart
A. Avoid a transfusion reaction
Glycosylated hemoglobin is performed to monitor the effectiveness of therapy in which of the following condition?
A. Acidosis
B. Diabetes
C. Inflammation
D. Renal disease
Prior to performing a test on a POCT instrument, the phlebotomist should?
A. Be able to operate the instrument correctly
B. Be familiar with the instrument's maintenance procedures
C. Understand the quality assurance aspects of the instrument
D. All of the above
Which of the following procedure Is required for a BC using a Chloroprep kit?
A. Cleansing bottle tops with isopropyl alcohol
B. Isopropyl swab before using Chlorprep
C. Scrubbing for a full 2 minutes
D. Using concentric circles with PVP
A. Cleansing bottle tops with isopropyl alcohol
Blood bank specimens require which of the following identification information?
A. Date and Time of collection
B. Patient's date and birth
C. Patients full name
D. All of the above
The Hemocue plasma/ low hemoglobin instrument Is used to indicate?
A. Iatrogenic anemia
B. Hemolyzed red cells
C. kidney malfunction
D. respiratory ditress
Peak and trough specimens are collected for?
A. Blood cultures times two
B. Blood units to be crossed match
C. Cardiac enzyme evaluation
D. Therapeutic drug monitoring
D. Therapeutic drug monitoring
In collecting blood culture, one of the most frequent errors made is?
A. failure to inoculate two media bottles
B. improper cleansing of the site on arm
C. placing an insufficient amount of blood in the blood
D. incorrect labeling of the media bottles
B. improper cleansing of the site on the arm