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Ritonavir, Plasma

Test Code: ARVRI

Test Code

ARVRI

Test Name

Ritonavir, Plasma

Specimen Type

Container Type = Green Top Preferred: sodium heparin Acceptable: lithium heparin Minimum Testing Volume (Adult) = 2 mL Plasma Minimum Testing Volume (Children) 200 mcL plasma Tube must fill to at least ½ or greater of its vacuum capacity

Container

Green Top Preferred: sodium heparin Acceptable: lithium heparin

Handling

Collection Instructions: Collect sample in green top tube (Heparin). Avoid gel-separator tubes. For specimen stability and testing site’s requirements, acceptable specimens can be drawn Sunday to Wednesday only. Ensure both sample and requisition are labelled properly. Write your initials, date and time of collection on the collection label. Blood should be drawn just prior to the next dose (trough). If this is not possible, blood drawing should be done between 6 hours and 14 hours postdose for ARVs administered twice daily or between 12 hours and 26 hours postdose for ARVs administered once daily. Samples taken to measure efavirenz concentrations should be drawn greater than or equal to 10 hours postdose. If malabsorption is suspected, the sample should be drawn at the time expected for the maximum concentration (Tmax). Laboratory Staff Instructions: Enter collection time in the order entry comment section. Separate plasma from cells within 2 hours of collection. Store and send frozen. Sample Rejection Criteria:Gross hemolysis, Gross lipemia, unlabeled or samples of non sufficient quantity. Stability: Stable refrigerated for 48 hours, Frozen for more than 48 hours. Transportation: Send sample to core lab ASAP.

Stability

Stable refrigerated for 48 hours, Frozen for more than 48 hours.

Reference Range

3.0 – 8.0 mg/L

Performing Lab

Referred Out – QC, Canada (ROMUHC43)

Turnaround Time

10 days

Test Notes

Last Updated: December 01, 2020

Status

active

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What types of laboratory tests are available at Mijo Labs?

Find clear and concise answers to your questions about test procedures, specimen collection, and result interpretation.

How do I prepare a specimen for testing?

Specimen requirements vary by test; please refer to each test’s guidelines for accurate preparation instructions.

Can I request tests for external clients through Mijo Labs?

Yes, Mijo Labs supports external clients with comprehensive test ordering and reporting options.

How long does it take to get test results?

Turnaround times depend on the test type; most results are available within 24 to 72 hours.

Are there any tests that require special handling?

Certain specimens require specific storage or transport conditions to ensure accuracy.

Who can I contact for technical support regarding tests?

Our clinical support team is available to assist with any test-related inquiries or concerns.

What do the test results mean for patient care?

Interpreting results helps guide clinical decisions; consult your healthcare provider for personalized advice.