Continuing Education Courses
Continuing Education for MLS & MLT
Continuing Education for Phlebotomists
Continuing Education for Histologists
HR Courses
Intro to the Medical Lab
Video Continuing Education Courses
All Available Courses
Exam Simulators
Exam Simulator for MLS & MLT
NSH + LabCE Histology Exam Simulator
Phlebotomy Exam Simulator
Molecular Exam Simulator
Case Simulators
RBC Morphology Simulator
White Blood Cell Differential Case Simulator
Advanced WBC Differential Case Simulator
Urinalysis Case Simulator
Body Fluid Case Simulator
Bacteriology Case Simulator
Blood Culture Gram Stain Case Simulator
LabCE Quiz Game
Contact & Support
Log In
Log In
Which of the following would give a false negative result?
This version of the course is no longer available.
Need multiple seats for your university or lab?
Get a quote
The page below is a sample from the LabCE course
. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.
Learn more about (online CE course)
Which of the following would give a false negative result?
Please select the single best answer
Oxymorphone present at 350 ng/mL in an oxycodone class screen where oxymorphone shows 25% cross-reactivity. The cutoff is 100 ng/mL.
Hydrocodone present at 285 ng/mL in an opiate class screen where hydrocodone shows 25% cross reactivity of morphine. The cutoff is 300 ng/mL for morphine.
MDMA present at 2,005 ng/mL in an amphetamine class screen where MDMA shows 10% cross reactivity. The cutoff is 200 ng/mL.
X
×