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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
Lactate, Blood
(LACT)
 
Chem 1 GYT 
Transport on ice immediately
Minimum draw=3 ml
0.5 - 2.2 mMoL/L

Critical: >4.0 mMol/L
24 hrs/ 7 days
Results: 2 hrs
STAT: 1 hr
Lactate Dehydrogenase
 
Chem See LD    
Lactic Acid
 
  See Lactate.     
Lambda Free Light Chains
(FRLC)
 
Immu See Free Light Chains    
LAP
  
Ref 1 GRN (Na Heparin), plus six unfixed smears.  Anatomic Pathology Test Request Form Recommended.    ARUP Test Directory Mailout: 5-7 days
LD
Serum (LD)
Body Fluids (FLLDH)
CSF (SFLDH)
Chem 5 ml blood, 1 Light Green

3 ml fluid - If fluid is clotted or viscous it cannot be run.  
Serum 100 -248 IU/L
Critical: ≥ 400 IU/L (MIC, BONC, 7COP only)

Body Flds: 2/3 of serum value

CSF: 6 -30 IU/L
24 hrs/ 7 days
Results: 2 hrs
STAT: 1 hr
LD Isoenzymes
(LDISO)
Ref 5 ml blood, 1 Gold Top  
Avoid hemolysis.  
Do Not Refridgerate
ARUP Test Directory Mailout: 5-7 days
LDL-Cholesterol
(LDL)
Chem

See Cholesterol-LDL

   
Lead, Whole Blood
(PBBLD)
Ref 5 ml blood, royal blue with additive ARUP Test Directory Mailout: 5-7 days
Legionella pneumophilia Antibody, IgG by Indirect FA
(LEGIG)
Ref 5 ml blood, 1 Gold Top  
Label sample as "acute" or "convalescent"
ARUP Test Directory Mailout: 5-7 days

Legionella, Urine Ag.

(LEGAG)

 
Micro BD (yellow top) no additive urine collection tube.

Negative


Physician will be called with Positive results.
 

Daily


Results: Same day
 
Legionella Culture
(LGCLT)
Micro Sputum or other respiratory specimens transported in sterile, no additive, leakproof container.   

Negative


Physician will be called with Positive Legionella results.
 
Daily
Results: 7 days
Leptospira Antibodies
(LEPT)
Ref 5ml blood, 1 Gold Top  
Separate serum from cells ASAP
ARUP Test Directory Mailout: 5-7 days
Leptospira Antibody,
IgM by Dot Blot
Ref 4 mL SST tube or 3 mL
GRN (sodium or lithium
heparin)
Separate serum or plasma
ASAP.  Mark as "Acute"
or "Convalescent"
(convalescent must be
received within 30 days
of acute sample)
Negative:  No significant level
of Leptospira IgM antibody
detected.

Equivocal:  Questionable
presence of Leptospira IgM
antibody detected.  Repeat
testing in 10-14 days may be
helpful.

Positive:  Presence of IgM
antibody to Leptospira
detected, suggestive of a
current or recent infection.
 
Mailout: M-F
Results: Up to 7 weeks
Leukemia (Chronic)/ Lymphoma Panel Flow Sodium Heparin GRN & 1 LT This panel evaluates patients with atypical lymphocytosis without blasts. Call Flow lab (65953) with questions. Interpretive report M-F
Results: 8hrs
Leukocyte Alkaline Phosphatase {LAP}
  
Ref 1 GRN (Na Heparin), plus six unfixed smears.  Anatomic Pathology Test Request Form Recommended.    ARUP Test Directory Mailout: 5-7 days
Leukocytes, Fecal
(FWBC)
Micro Stool transported in sterile, no additive, leakproof container Negative Daily, 7am-11pm
Result: Same day
LH {Luteinizing Hormone}
(LH)
Chem

See Luteinizing Hormone 

   
Librium {Chlordiazepoxide} Ref 5 ml blood, 1 plain RT ARUP Test Directory Mailout: 5-7 days
Lidocaine  
(LIDO)
Ref 10 ml blood, 1 large RT ARUP Test Directory Mailout: 5-7 days
Lipase
(LIP)
Chem 5ml blood, 1 Light Green

36-60 U/L

24 hrs/ 7 days
Results: 2 hrs
STAT: 1 hr
Lipoprotein Electrophoresis Ref 9 ml blood, 1 large Gold Top   ARUP Test Directory Mailout: 10-14 days
Lithium 
(LI)
 
Chem
 
5ml blood, 1 Gold Top    or sodium heparin GRN 0.6 - 1.2 mMol/L

Critical Value:
 >2.0 mMol/L
24 hrs/ 7 days
Results: 4 hrs
STAT: 1 hr
Liver-Kidney Microsome Antibodies (LKM1)
 
Ref 5ml blood, 1 Gold Top    ARUP Test Directory Mailout: 5-7 days
Low Density Lipoproteins
(LDL)
Chem

See Cholesterol-LDL

   
L/S Ratio   Chem Test no longer performed. See Fetal Lung Maturity Screen    
Lupus Anticoagulant
(LUPA1)
Special Coagulation

2 BLT, specimen amount is critical to maintain proper ratio of blood to anticoagulant

Interpretive

7 days or less

Luteinizing Hormone, LH
(LH2)
Chem 5 ml blood, 1 Light Green   Males: 1.24-8.62 mIU/mL

Females:
Postmenopausal: 10.87-58.64
Follicular: 2.12-10.89
Mid-cycle: 19.18-103.03
Luteal phase: 1.20-12.86
 
M, W, F
Lyme Antibodies Detection by ELISA
(LYMGM)
Ref 5ml blood, 1 Gold Top   
or 3 ml CSF
ARUP Test Directory Mailout: 5-7 days
Lysozyme, Serum or Body Fluid
(LYSO)
Ref 6 ml blood, 1 Gold Top  
or 0.5 ml CSF, tears or other body fluid with the exception of urine
ARUP Test Directory Mailout: 5-7 days
Lysozyme, Urine Ref 3 ml urine from a random  collection  ARUP Test Directory Mailout: 5-7 days
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Updated: 09.28.2012