Item Value
Test name Heparin Level (Low Molecular Weight Heparin)
Available Stat? No
Turn around times 1 day
In House Availability Test run Monday-Sunday, 0800 – 2300

Performed by Parnassus & Mission Bay Hematology
Normal range Therapeutic (4 hours post dose):

Enoxaparin:
Q12 dosing 0.5-1.0 U/mL
Qday dosing 1.0-2.0 U/mL
Prophylactic dosing 0.2-0.4 U/mL


Dalteparin:
Q12 dosing 0.6 U/mL
Qday dosing 1.05 U/mL


Tinzaparin:
Qday dosing 0.85 U/mL


These are general guidelines only. Detailed recommendations for heparin therapy and monitoring are available through the UCSF Comprehensive Hemostasis and Antithrombotic Service (CHAS), which can be contacted at pager 443-4023.
Container type Blue top filled to full extent of vacuum
Amount to Collect 2.7 mL blood
Collection Instructions Time to steady state: 3 doses in adults and 1 dose for pediatric patients.

Collect 4 hours after 4th dose (adults) and 4 hours after 1st dose (pediatrics)

1. Check the expiration date on the label of the blue top vacutainer before drawing the patient.

2. For blood collection in a sodium citrate blue top, the tube must be filled to above the Minimum Fill Indicator on the tube. It is crucial to wait and allow the tube to stop filling before removing it from the needle.

3. With use of a butterfly needle, draw about 1 cc using a separate blue top to remove air from tubing, discard the first tube and then draw a second blue top tube filled to the full extent of the vacuum.

4. Tubes should not be filled past the Maximum Fill dashed line by either using a syringe or removing the tube cap.

Indicate exact brand and type of heparin or heparinoid being used on requisition.

For patients with Hct's ≥ 55% please contact Hematology (Parnassus: 3-1747, Mission Bay: call 6-0194) to obtain blue top tubes with adjusted citrate volumes in order to maintain the proper citrate to plasma ratio for coagulation studies.
Sample type Citrated Plasma

If you have additional questions regarding this test, please call: 415-353-1667