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HelpEpic Code LAB3400 OB Magnesium, Blood Level
Test Name Alias
OB Magnesium Blood Level, OB Mg Blood Level, obstetric | 365
Interface Order Alias
11703
Ordering Instructions
This test is limited to hospital obstetrical patients that have been administered intravenous magnesium sulfate.
This test is only for Obstectric (OBGYN) Patients.
This test can no longer be added on to specimens in lab.
Collection Instructions
Specimen Collection: Blood
Container(s): 4.5 mL Mint Green Top (Lithium Heparin Gel) or 5.0 mL Gold Top (Serum Separator-SST Gel)
Preferred Volume to Collect: 4.5 mL
Minimum Volume to Collect: 1.0 mL
Neonate Volume to Collect: Not applicable
Capillary collect ok? Yes
Microtainer acceptable: Yes
Collection Instructions:
-
This test is only for Obstectric (OBGYN) Patients.
- After collection, gently invert tube 8-10 times.
- Specimen should be processed within 2 hours – See Processing Instructions.
Processing Instructions (Laboratory, Outpatient or Off-site collection)
Processed Specimen: Plasma or Serum
Centrifuge/Spin: Yes
Aliquot: Yes
Processing Instructions:
- Plasma is preferred specimen type
- Green Tube/Plasma: Centrifuge after collection within 2 hours.
- Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 1 hour.
Transport Temperature: Refrigerate
Specimen Transport Temperature
Refrigerate
Specimen Stability
This test can no longer be added on to specimens in lab.
Ambient: 8 hours
Refrigerate: 72 hours
Frozen: aliquot plasma/serum for longer storage
Laboratory Retention: 72 hours
Test Frequency
Available 24 hours, usual TAT 1 day.
Reference Range
4.8 – 8.0 mg/dL Therapeutic
8.0 – 12.0 mg/dL Loss of Deep Tendon Reflexes
10.0 – 12.0 mg/dL Somnolence
12.0 -16.0 mg/dL Respiratory difficulty/depression
15.0 -17.0 mg/dL muscular paralysis
> 18.0 mg/dL altered cardiac conduction
Performing Department
CHEMISTRY
Performing Department Laboratory Location
Spectrum Health Regional Laboratory, Grand Rapids, MI
Spectrum Health Big Rapids Laboratory, Big Rapids, MI
Spectrum Health Blodgett Laboratory, Grand Rapids, MI
Spectrum Health Gerber Laboratory, Fremont, MI
Spectrum Health Kelsey Laboratory, Lakeview, MI
Spectrum Health Ludington Laboratory, Ludington, MI
Spectrum Health Pennock Laboratory, Hastings, MI
Spectrum Health Reed City Laboratory, Reed City, MI
Spectrum Health United Laboratory, Greenville, MI
Spectrum Health Zeeland Laboratory, Zeeland, MI
Methodology
Colorimetric
CPT
83735
CDM Code
4058271
Epic Test ID
1230102060
Beaker LOINC
HEMOLYSIS INDEX: N/A
LIPEMIA INDEX, SERUM: N/A
MAGNESIUM LEVEL: 19123-9
Additional Information
PolicyTech Procedure Reference #8530: Magnesium Sulfate Infusion in the Obstetrical Patient
Reviewed Date
3/23/2022
Beaker Names
Beaker Procedure Name: OB MG BLOOD LEVEL
Beaker Display Name: OB Magnesium, Blood Level
BEAKER TEST NAME: OB MAGNESIUM
BEAKER TEST REPORT NAME: OB Magnesium
Beaker Synonyms
No synonym on file
Beaker Location, Container and Temperature
BW CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BW CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
BW CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
BL CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BL CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
BL CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
BR CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BR CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
BR CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
GM CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
GM CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
GM CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
KL CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
KL CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
KL CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
LH CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
LH CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
LH CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
PH CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
PH CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
PH CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
RC CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
RC CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
RC CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
UN CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
UN CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
UN CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated
ZH CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
ZH CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
ZH CHEMISTRY: GREEN LI MICROTAINER (Acceptable)-Refrigerated