Laboratory Medicine

Test catalogue

Homocysteine
Test Name Homocysteine
Specimen Type / Requirements Container Type = 1 Lavender Minimum Venous Volume = 2 mL Plasma
Specimen Handling Collection Instructions: Collect sample in a lavender top and send to core lab. Sample should be well mixed at time of collection to prevent platelet clumping. Fasting specimen preferred. Write your initials, date and time of collection on the collection label. Stability: Stable at ambient temperature for 4 hours; refrigerated at 2-8°C for 28 days; and frozen at or below -20° for up to 10 months. Freeze samples only once and mix thoroughly after thawing Laboratory Staff Instructions: Ambient sample: Separate plasma from cells within 1h of collection. Transportation: Send sample on ice to Core Lab within 1 hour of collection. Sample Rejection Criteria: Plasma, clotted sample, Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity Samples will be rejected.
Required Documentation
Turnaround Time (TAT) 24 Hours	Test Utilization Routine
Reference Value <= 60 yrs old: 5 - 15 umol/L > 60 yrs old: 5 - 20 umol/L
Test Code HCYS	Methodology Beckman Enzymatic Assay
Testing Location SMH-Biochemistry	Other Information Last Update: May 30, 2025

Homocysteine

Test Name

Homocysteine

Specimen Type / Requirements

Container Type = 1 Lavender

Minimum Venous Volume = 2 mL Plasma

Specimen Handling

Collection Instructions: Collect sample in a lavender top and send to core lab. Sample should be well mixed at time of collection to prevent platelet clumping. Fasting specimen preferred. Write your initials, date and time of collection on the collection label.

Stability: Stable at ambient temperature for 4 hours; refrigerated at 2-8°C for 28 days; and frozen at or below -20° for up to 10 months. Freeze samples only once and mix thoroughly after thawing

Laboratory Staff Instructions: Ambient sample: Separate plasma from cells within 1h of collection.

Transportation: Send sample on ice to Core Lab within 1 hour of collection.

Sample Rejection Criteria: Plasma, clotted sample, Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity Samples will be rejected.

Required Documentation

Turnaround Time (TAT)

24 Hours

Test Utilization

Routine

Reference Value

<= 60 yrs old: 5 - 15 umol/L

> 60 yrs old: 5 - 20 umol/L

Test Code

HCYS

Methodology

Beckman Enzymatic Assay

Testing Location

SMH-Biochemistry

Other Information

Last Update: May 30, 2025