Coag—General procedures & notes

Question 1

finger & heelstick samples are OK for…

Answer 1

anti-Xa
LMW heparin

Question 2

proper fill level for Na citrate tubes

Answer 2

90% to 110%

Question 3

coag specimens cannot be (venous/arterial/cord/capillary)

Answer 3

capillary

Question 4

comment shortcuts for high Hct and adjusted Na citrate for high Hct

Answer 4

High Hct: .bkrcoaghctwarn

Adjusted: .bkrcoaghctadj

Question 5

calculation used to make up Na citrate tubes for high Hct

Answer 5

C = V(100-H)/(595-H)

C = vol Na citrate
V = vol WB
H = hct

Question 6

—- mL should be wasted when drawing from a heparin line

Answer 6

4.0 mL

Question 7

centrifugation for coag samples
goal

Answer 7

5000 rpms for 5 min
PPP: <10,000 plt

Question 8

frozen coag specimens may be kept for —— in the -10 to -20° freezer, and ——- in the -70° freezer

Answer 8

2 weeks
6 months

Question 9

thawing frozen coag specimens

Answer 9

in 37° water bath and tested without delay

Question 10

after coag tests are completed, samples are stored

Answer 10

at RT for 24 hr

Question 11

coag QC data is kept for ——-

Answer 11

2 years

Question 12

when do manual INR calculation checks need to be done?

Answer 12

• Change in lot or type of PT reagent
• Establishment of new PT reference ranges
• Change in instrument
• Change in INR calculation
• Once a year in the absence of the above changes

Question 13

used to reconstitute coag reagents & controls

Answer 13

NERL water
grade A pipettes

Question 14

primary coag instrument

Answer 14

Stago STA Compact Max A

Question 15

Compact Max QC done every 8 hours

Compact Max QC done PRN

Answer 15

every 8 hours:
- PT
- PTT
- Dimer
- Fib
- Heparin

PRN:
- LMW heparin (anti-Xa)
- ATIII

Question 16

check before loading sample on Compact Max

Answer 16

• volume at line
• Hct <55
• hemolysis
• bubbles at surface
• tests ordered (Xtra tubes not loaded!)

Question 17

check after unloading sample from Compact Max

Answer 17

• clots
• scan for verification