M

Collection Tube Abbreviations

  RT  =  Plain Red top   GYT  =  Gray top   RBL  =  Royal Blue top
  RHalo = Red Halo   YT  =  Yellow top   PT  =  Pink top
  BLT  =  Blue top   GRN  =  Green top   PPT  =  Pearl top
  LT  =  Lavender top   SGRN  =  Special Green   GHalo = Green Halo
Test
(TEST CODE)
Lab
Section
Special
Requirements
Reference Ranges and Critical Values Testing Schedule and Expected
Turnaround
Time
MAG Antibody
 
Ref 7 ml blood, 1 large RT No antibody detected Mailout: 5-7 days
ARUP
Magnesium, Serum
Adult (MG)
Neonate (MAGP2)
Chem /
Peds Lab
Adults: 5 ml blood, 1 Light Green
Infants: 1 green or amber bullet tube
 
1.8 - 2.9 mg/dL

Critical:  <1.0 mg/dL
                >9.0 mg/dL

Pediatric:  <1.3 mg/dL
                   >3.9 mg/dL

24 hrs/ 7 days
Results: 2 hrs
STAT: 1 hr
Peds Lab:
  
Routine: 2 hrs
    STAT: 1 hr
Magnesium, Urine
(UMG2)
Chem 24 hr urine, urine bottle obtained from Central Processing. 

Timed:  73-122 mg/24hr
 
24 hrs/ 7 days
Results: 2-4 hrs
 
Malaria Smears
{Blood Parasites}

(BPSM)

Includes Babesia, Malaria, Trypanosomes, & Microfilaria.

Micro

3 ml blood; 1 LT

In cases of suspected malaria, specimens should be taken at intervals of 6 to 18 hours for at least three successive days. 
Negative
Physician will be called with Positive results
  M-F
Results: 24 hrs. After hours contact CP Resident (688- 2820).
Manganese, Serum  Ref 1 royal blue top, no additives 0.0 -7.8 µg/L Mailout: 5-7 days
ARUP
Marijuana Screen, Serum
(THCS)
Ref 10 ml blood, 1 plain RT Negative Mailout: 5-7 days
ARUP
Measles [Rubeola] Antibody, IgG
(MEASG)
Ref 5 ml blood, 1 Gold Top  
Label sample as "acute" or "convalescent"
Interpretive report Mailout: 5-7 days
ARUP
Measles [Rubeola] Antibody, IgM
(MEASM)
Ref 5 ml blood, 1 Gold Top  
Label sample as "acute" or "convalescent"
Interpretive report Mailout: 5-7 days
ARUP
Measles [Rubeola] Panel, IgG & IgM
(MEASP)
Ref 5 ml blood, 1 Gold Top  
Label sample as "acute" or "convalescent"
Interpretive report Mailout: 5-7 days
ARUP
Melanin, Urine Ref 10 ml random urine
Critical frozen
Negative Mailout: 5-7 days
ARUP
Meperidine (Demerol) Ref   7 ml blood, 1 plain RT By report Mailout: 5-7 days
ARUP
Mephobarbital
 
Ref   5 ml blood, 1 plain RT 0-3 µg/mL Mailout: 5-7 days
ARUP
Meprobamate
 
Ref 5 ml blood, 1 plain RT 5-20 µg/mL
Toxic: >40 µg/mL
Mailout: 5-7 days
ARUP
Mercury, Blood
(HGBLD)
Ref One 7 mL dark blue top with EDTA 0-60 µg/L Mailout: 5-7 days
ARUP
Metanephrines Quantitation, Urine Ref 24 hr urine, refrigerated See final report for reference intervals Mailout: 5-7 days
ARUP
Methadone, Serum Ref 7 ml blood, 1 plain RT By report Mailout: 5-7 days
ARUP
  

Methadone, Urine Screen

Chem

5 ml Urine

Negative

24 hrs/7 days, Results: 2 hours, STAT:1 hour

Methanol Ref  7 ml blood, 1 plain RT Detection limit is 5 mg/dL
Toxic: >20 mg/dL
Mailout: 5-7 days
ARUP
Methotrexate
(METX)
Chem 5 ml blood, 1 Gold Top  
 
Effective levels (µMol/L)
<10.0 at 24 hrs
<1.0 at 48 hrs
<0.1 at 72 hrs
 
24 hrs/ 7 days
Results: 2 hrs
STAT: 1 hr
Methsuximide/ Normethsuximide Ref 7 ml blood, 1 large RT     Meth:<1 µg/mL
Normeth: 10-40 µg/mL
Mailout: 5-7 days
ARUP
Methylmalonic Acid, Serum
(SMMA)
Ref 7 ml blood, 1 large RT <0.4 µmol/L Mailout: 5-7 days
ARUP
Methylmalonic Acid, Urine
(URMMA)
Ref 2 ml of random or 24 hour urine 0.0-3.6 mmol/mol Creatinine Mailout: 5-7 days
ARUP
Mexiletine Ref 5 ml blood, 1 RT   Therapeutic:1-2 µg/mL
Toxic: 1.5-3.0 µg/mL
Mailout: 5-7 days
ARUP
Microalbumin, Urine
24 hour (UMALB)
Random (MALBU)
Chem Random Urine (>40ml)  or 24h/urine, refrigerate, no preservative. Includes a routine urinalysis. Random samples positive for protein or nitrite will not be tested for microalbumin.   Random: <25
Timed: <30 mg/24h

Microalbumin/Creatinine ratio: 2.0-30

M-F
Cutoff: 5 pm
Result: 24 hrs
Microfilaria Blood Smear
{Blood Parasites Smear}
(BPSM)

Includes Babesia, Malaria, Trypanosomes, & Microfilaria.

Micro

3 ml blood; 1 LT

In cases of suspected malaria, specimens should be taken at intervals of 6 to 18 hours for at least three successive days. 
Negative
Physician will be called with Positive results
  M-F
Results: 24 hrs. After hours contact CP Resident (688- 2820).
Mitochrondrial M2 Antibody, IgG
(MITAB)
Ref 5 ml blood, 1 Gold Top  
Separate serum from cells ASAP
<1.0 units: No antibody
1.0-1.3 units: Inconclusive
>1.3 units: Positive
Mailout: 5-7 days
ARUP
Mixing Study Screen
(50-50 mix)
(MIX
SC)
Heme 3.5 BLT

Specimen amount is critical to maintain proper ratio of blood to anticoagulant.

  Daily, 7am-11pm
 
Morphine, Urine Ref Random urine.
Includes quantitation of all opiates
See final report Mailout: 5-7 days
ARUP
Monospot 
(MONS) 
Chem  5 ml blood, 1 RT Negative 24 hrs/ 7 days
Results: 2 hrs
STAT: 1 hr

Mycobacteria other than Tuberculosis-PCR

(MOTT)

 

Ref to VA

CSF, sputum or tissue in sterile, no additive, leakproof transport container.

Test performed at VA hospital

 

Negative

Physician will be called with Positive results

 

M-F

Results: 7-10 days

 

Multiple Sclerosis Panel 
(MSPAN)
Ref 2 ml CSF and 6 ml blood, 1 Gold Top   Interpretive report Mailout: 5-7 days
ARUP
Mumps Virus Antibody, IgG
(MVIR)
Ref 5 ml blood, 1 Gold Top   
Label sample as "acute" or "convalescent"
Interpretive report Mailout: 5-7 days
ARUP
Muramidase, Serum Ref See Lysozyme, Serum or Urine.      
Myasthenia Gravis Panel
(MGPAN)
Ref 5 ml blood, 1 Gold Top   Interpretive report Mailout: 5-7 days
ARUP
Mycoplasma Antibodies, IgG & IgM
(MYPNU)
Ref 5 ml blood, 1 Gold Top  
Separate serum from cells ASAP.  Label sample as "acute" or "convalescent"  
Interpretive report Mailout: 5-7 days
ARUP
Mycoplasma Culture
(MYCUL)
Ref Throat swab, sputum, CSF, tissue.  Refer to ARUP manual for more information. Culture negative for Mycoplasma pneumoniae Mailout: up to 30 days
ARUP
Myelin Basic Protein, CSF
(MYBP)
Ref 1 ml CSF
Freeze.  
0.0-2.3 ng/mL Mailout: 5-7 days
ARUP
Myocardial Antibody, IgG Ref 5 ml blood, 1 Gold Top  
Separate serum from cells ASAP
<1:20 No antibody detected Mailout: 5-7 days
ARUP
Myoglobin
(SMYO)
Chem 5 ml blood, 1 Light Green  3.0 - 70.0 µg/mL

 
M-F
Cutoff: 2pm 
Results: Same Day
Myoglobin, Urine
(UMYO)
Heme 8 ml fresh urine Negative 24 hrs/ 7 days
Results: 2 hrs

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