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ExaminationPlacidyl®
See Ethchlorvynol, BloodPlasma Electrolytes
See Electrolytes, SerumPlasma Homocysteine
See Homocysteine, Plasma

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E. coli 0157
See Culture, Stool with Shiga Toxin

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E. histolytica Antibody
See Entamoeba histolytica Antibody

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EBV Antibody
See Epstein Barr Virus Antibody Profile

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EBV Antibody Panel
See Epstein Barr Virus Antibody Profile

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EBV IgG/IgM
See Epstein Barr Virus Antibody Profile

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EBV Serology
See Epstein Barr Virus Antibody Profile

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EBV Titers
See Epstein Barr Virus Antibody Profile

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EBV, PCR, CSF
See Epstein Barr Virus, PCR, Cerebrospinal Fluid

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Echinococcus
See Parasite Identification

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ECHO virus Antibody Profile		Test Code: ECHAP
Includes:	Antibodies to each of the following: •ECHO virus 4, 7, 9, 11, and 30
CPT:	86658 for each (x5)
Methodology:	Complement Fixation
Testing Schedule:	Routine, daily
Report Available:	2-4 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
<1:8: No antibody detected NOTE: Compare acute and convalescent titers for greatest diagnostic value.A four fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis of recent infection.

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Effusion Cytology
See Cytopathology, Fluid

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Ehrlichia Antibody Profile		Test Code: EHCP
Includes:	• IgG and IgM Antibodies each of the following: • Ehrlichia chaffeensis • Anaplasma phagocytophilia (previously known as Ehrlichia equi)
CPT:	86666 x 4
Methodology:	Indirect Fluorescent Antibody (IFA)
Testing Schedule:	Routine, 2 times per week
Report Available:	3-5 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
• Ehrlichia chaffeensis: .....•<1:40 for both IgG & IgM •Anaplasma phagocytophilia: .....•<1:80 for IgG .....•<1:20 for IgM
Clinical Utility:
Useful for diagnosing Human Monocytic Ehrlichiosis(HME) and Human Granulocytic Ehrlichiosis (HGE).Seroconversion can occur two to four weeks after the onset of infection.

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Elavil®
See Amitriptyline

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Electrolytes, Body Fluid		Test Code: FELE
Includes:	• Sodium • Potassium • Chloride
CPT:	82438, 84999, 84302:
Alternate Name:	• Body Fluid Electrolytes • Miscellaneous Electrolytes
Methodology:	Potentiometry
Testing Schedule:	Routine, STAT testing available
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	1 mL body fluid
Container:	Red top tube, no serum separator
Reference Range:
None established, must be interpreted with clinical findings.
Clinical Utility:
Used to evaluate the sodium, potassium and chloride levels in various body fluids.

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Electrolytes, Serum		Test Code: ELEC
Includes:	• Sodium • Potassium • Chloride • Carbon dioxide (CO2) • Anion Gap Calculation
CPT:	80051
Alternate Name:	• Lytes, Blood • Plasma Electrolytes • Serum Electrolytes
Methodology:	See individual test listings.
Testing Schedule:	Routine, STAT testing available
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Reference Range:
See individual test listings
Critical Values:
See individual test listings
Clinical Utility:
Used to evaluate electrolyte and acid/base balance.

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Electrolytes, Stool		Test Code: SELE
Includes:	•Sodium •Potassium •Chloride
CPT:	84302, 84999, 82438
Methodology:	Ion Selective Electrode
Testing Schedule:	Routine, STAT testing available
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	1 mL liquid stool
Container:	Plastic urine container
Special Instructions and/or Comments:
Refrigerate
Reference Range:
• Sodium:............................40-110 mEq/L • Potassium:........................30-140 mEq/L • Chloride: ..........................None established, highly dependant upon diet
Clinical Utility:
Used to help differentiate types of diarrhea.

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Electrolytes, Urine Random:		Test Code: RUEL
Includes:	• Sodium, Urine • Potassium, Urine • Chloride, Urine
CPT:	84300, 84133, 82436
Alternate Name:	• Lytes, Urine • Urine Electrolytes
Methodology:	Ion Selective Electrode
Testing Schedule:	Routine, STAT testing available
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	5 mL random urine
Container:	Plastic urine container
Collection:	Random
Special Instructions and/or Comments:
Transport to the laboratory promptly.
Reference Range:
For sodium and potassium spot samples there is a large diurnal variation in range. • Sodium:....................30-90 mEq/L • Potassium:................20-125 mEq/L • Chloride:...................N/A highly dependent upon diet
Clinical Utility:
Used to evaluate electrolyte, water and acid base balances, renal function and hydration status.

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Electrolytes, Urine 24-Hour:		Test Code: 24EL
Includes:	24-Hour Includes: • Volume Measurement • Collection Period • Creatinine, Urine • Sodium, Urine • Potassium, Urine • Chloride, Urine
CPT:	81050, 84300, 84133, 82436
Alternate Name:	• Lytes, Urine • Urine Electrolytes
Methodology:	Ion Selective Electrode
Testing Schedule:	Routine, STAT testing available
Report Available:	1 day
Specimen Requirements:
Container:	5 mL random urine OR entire 24-Hour urine collection Container: Plastic urine container OR entire 24-Hour plastic urine container, no preservative
Collection:	24-Hour urine collection: See special instructions for “24-Hour Urine Collection”, listed under Specimen Collection, Preparation, and Handling Section
Special Instructions and/or Comments:
Transport to the laboratory promptly.
Reference Range:
• Sodium:.................40-220 mEq/24 hours • Potassium:.............25-150 mEq/24 hours • Chloride...............110-250 mEq/24 hours • Creatinine:............0.8-2.8 g/24 hours
Clinical Utility:
Used to evaluate electrolyte, water and acid base balances, renal function and hydration status.

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Electrolytes, Vitreous		Test Code: VELEC
Includes:	• Sodium, • Potassium • Chloride • Urea Nitrogen • Creatinine
Methodology:	Ion Selective Electrode Enzymatic
Testing Schedule:	Routine, 2X per week
Report Available:	1-3 days
Specimen Requirements:
Minimum Volume:	0.5 mL vitreous fluid
Container:	Red top (no serum separator) tube
Reference Range:
Not established, must be interpreted with post mortem findings
Clinical Utility:
Useful for the assessment of electrolyte balance andrenal function in post mortem samples.

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Electrophoresis, Protein, CSF
See Protein Electrophoresis,Cerebrospinal Fluid

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Electrophoresis, Protein, Serum
See Protein Electrophoresis, Serum

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Electrophoresis, Protein, Urine
See Protein Electrophoresis, Urine

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Elution, Antibody
See Direct Coombs Test

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ENA Autoantibody Profile		Test Code: ENAP
Includes:	RNP and Sm Autoantibodies
CPT:	86235, 86235
Alternate Name:	• Anti-Sm\RNP Antibody • Anti-Sm Antibody • ENAProfile • Extractable Nuclear Antigen Profile • RNP,SM
Methodology:	Enzyme-Linked Immunosorbent Assay(ELISA)
Testing Schedule:	Routine, -2 times per week
Report Available:	5-7 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator)tube
Clinical Utility:
Anti-Sm antibodies are highly specific for systemiclupus erythematosus (SLE).Anti-RNP antibodies in association with Anti-Sm antibodies are associated with systemic lupus erythematosus. Anti-RNP antibodies without Anti-Sm antibodies are associated with Mixed Connective Tissue Disease (MCTD).

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ENA Profile
See ENA Autoantibody ProfileEndocervical Culture
See Culture, Genital

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Endometrial Culture
See Culture, Genital

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Endometrial Aspiration
See Cytopathology, Fluid

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Endomysial IgA Autoantibody		Test Code: AEND
CPT:	86256
Alternate Name:	• Anti-Endomysial TgA • Antibody Edomysial Auto-Antibody
Methodology:	Indirect Fluorescent Antibody (IFA)
Testing Schedule:	Routine, Monday-Friday
Report Available:	5-7 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
<1:10
Clinical Utility:
Endomysial autoantibodies ar hightly specific for gluten sensitive enteropathies such as celiac disease anddermatitis herpetiformis.

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Endotracheal Aspirate Culture
See Culture, Sputum

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Enolase, Neuron-Specific		Test Code: NSENB
CPT:	83520
Alternate Name:	Neuron Specific Enolase
Methodology:	HomogeneousTime Resolved Fluorescence (HTRF)
Testing Schedule:	Routine, 1 time per week
Report Available:	7-10 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Red top tube, no serum separator
Special Instructions and/or Comments:
Refrigerate
Reference Range:
> 15 ng/mL Serum markers are not specific for malignancy & values may vary by method
Clinical Utility:
Useful as an adjunct in the diagnosis of small cell lungcarcinoma ( SCLC ) in paitents with suspected paraneoplastic disorders. May also be helpful inpatients having neurologic complications that aremediated by SCLC.

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Enoxaparin®
See Heparin Level, Low Molecular Weight, Plasma

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Entamoeba histolytica Antibody		Test Code: AMEB
CPT:	86753
Alternate Name:	• Amoebic Antibody • E.histolytica Antibody
Methodology:	ELISA
Testing Schedule:	Routine, 2 times per week
Report Available:	5-7 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Centrifuge, transfer to plastic aliquot tube and freeze.Once frozen, transport specimen submerged in dry ice.
Reference Range:
Expected Values:...........Negative
Clinical Utility:
Useful in an adjunct in the diagnosis of extraintestinal amebiasis, especially liver absecess. Serology may be particularly useful in the supporting diagnosis of amebic liver abscess in patients without a definite history of intestinal amebiasis and who have not spent substantial periods of time in endemic areas

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Enteric Pathogens
See Culture, Stool with Shiga Toxin

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Enteric Pathogens Culture
See Culture, Stool Enterobius
See Parasite Identification
See Pinworm Identification

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Enterovirus Antibody Profile		Test Code: ENTAP
Includes:	• Antibodies to each of the following: • Coxsackie A Virus: A2, A4, A7, A9, A10, A16 • Coxsackie B Virus: B1, B2, B3, B4, B5, B6 • ECHO Virus: 4, 7, 9, 11, 30 • Poliovirus: 1, 2, & 3
CPT:	86658 (x20)
Methodology:	Complement Fixation
Testing Schedule:	Routine, 1 time per week
Report Available:	7-10 days
Specimen Requirements:
Minimum Volume:	3 mL serum
Container:	2 Gold top (serum separator) tubes
Special Instructions and/or Comments:
Refrigerate
Reference Range:
For all constituents:<1:8 = No antibody detected NOTE: Compare acute and convalescent titers for greatest diagnostic value.A four fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis of recent infection.
Clinical Utility:
Single titers >= 1:32 are indicative of recent infection. Titers of 1:8 and 1:16 may be indicative of either past or recent infection, since CF antibody levels persist for only a few months. There is considerable cross reactivity among enteroviruses; however, the highest titer is usually associated with the infecting serotype.

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Enterovirus, PCR, Cerebrospinal Fluid		Test Code: ENTPR
Includes:	87498 Alternate Name: Enterovirus RNA Detector Methodology: Polymerase Chain Reaction (PCR) Testing Schedule:Routine, daily Report Available:2-4 days Minimum Volume: 1 mL cerebrospinal fluid Container: Sterile conical tube Special Instructions and/or Comments: • Freeze • If possible, a separate tube should be collected for this test. • Maintain sterility. • Transport to the laboratory promptly. • Specimens grossly contaminated with blood may yield false negative results. Reference Range: Negative: Not detected Clinical Utility: Useful for detecting the presence of enterovirus viralRNA down to aid in the diagnosis of enterovirus infection.

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Enterovirus RNA Detector
See Enterovirus, PCR, Cerebrospinal Fluid

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Eos Count
See Eosinophil Count, Whole Blood

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Eosinophilic Cationic Protein		Test Code: ECATP
CPT:	83520
Methodology:	Fluorescent EnzymeImmunoassay (FEIA)
Testing Schedule:	Routine, 1 time per week
Report Available:	7-10 days VCA IgM VCA IgG EA EBN Interpretation N N N N No serological evidence of past, recent, or current EBV infection. Patient has not been infected, or if infected has not yet developed antibodies. Consideration of symptom onset with time of testing is important. A second “convalescent” specimen should be submitted in 10-14 days if results do not correlate with clinical presentation. P N N N Compatible with early acute primary EBV infection. This is an unusual pattern and may suggest very early seroconversion. Results should be interpreted in light of clinical presentation and a second “convalescent” specimen submitted in 10-14 days may be helpful. Heterotypic antibody responses associated with CMV or HSV cannot be ruled out at this time. P P P/N N Compatible with acute primary EBV infection. P P P/N P Compatible with recent EBV infection. N P P/N N Compatible with recent EBV infection. Results should be interpreted in light of clinical presentation. In adults, EBV serologic patterns such as these may suggest long past infection with possible loss of EBNA reactivity. N P P/N P Compatible with past EBV infection. When performed on children <3 months of age, pattern may suggest reactions due to maternal antibodies and cannot be interpreted without a second “convalescent” specimen submitted in approximately 1 month.
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serumseparator) tube
Special Instructions and/or Comments:
• Refrigerate, frozen preferred • If received as refrigerated serum, STORE FROZEN for referral testing
Reference Range:
< 2-10 mcg/l
Clinical Utility:
Serum ECP (Eosinophil Cationic Protein) may be a useful marker for monitoring and predicting the clinical course in asthma.

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Eosinophil Smear		Test Code: EOSMB
CPT:	Nasal: ................................89190 All other specimen types.....87205
Alternate Name:	• Nasal Smear for Eosinophils • Fecal smear for Eosinophils.
Methodology:	Manual
Testing Schedule:	Routine, daily
Report Available:	1 day
Specimen Requirements:
Container:	Nasal secretation OR sputum OR stool. Nasal swab OR slides OR sterile plastic container.
Collection:	• Specimens may be taken separately from each side of the nose for nasal secretions. • Secretion is most easily and readily collected by having the patient blow the nose on a waxed paper or cellophane handkerchief. NOTE: This gives a specimen which represents only nasal secretion or a collection of both nasal and sinus secretions. Small crusts from the septum and vestibule of the nose should be avoided. If no secretion is available from blowing the nose, it may be necessary to remove by swavving with a cotton applicator. Postnasal secretions may also be obtained using a suction cannula. Smear the specimen on a clear microscope slide.
Reference Range:
No Eosinophils present.
Clinical Utility:
Used in the evaluation of allergic and asthmatic disorders; parasitic infections..

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Eosinophil Count, Urine		Test Code: UEOSB
CPT:	87250
Alternate Name:	• Urinary eosinophils • Urine for Eosinophils • Eosinophiluria • Hansel stain of urine.
Methodology:	Manual
Testing Schedule:	Routine, daily
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	5 mL random urine
Container:	Plastic urine container
Special Instructions and/or Comments:
NOTE: An eosinophil smear SHOULD NOT be performed on a urine that is greater than 3 hours old
Reference Range:
0% Eosinophils
Clinical Utility:
Used to aid in the evaluation of interstitial nephritis and eosinophilic cysitis.

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Eosinophil Count, Whole Blood		Test Code: TEOS
CPT:	85048
Alternate Name:	• Absolute Eosinophil Count • Eos Count • Total Eosinophil Count
Methodology:	Automated Analyzer
Testing Schedule:	Routine, daily
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	2 mL whole blood OR 250 µL in BD Microtainer™
Container:	Lavender top (EDTA) tube OR Lavender top BD Microtainer™ tube for capillary collection
Reference Range:
• 0-7 days:......................0-1500/cmm • 8 days - 1 year:............0-800/cmm • > 1 year........................0-450/cmm
Clinical Utility:
Used in the evaluation of allergic and asthmatic disorders; drug reactions, some myeloproliferative disorders and parasitic infections.

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EPO
See Erythropoietin

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Epogen®
See Erythropoietin

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Epstein Barr Virus Antibody Profile		Test Code: EBVP
Includes:	• VCA IgG Antibody • VCA IgM Antibody • Antibody to Early Antigen • Antibody to EBNA • Interpretation
CPT:	86663, 86664, 86665 (x2)
Alternate Name:	• EBV Antibody • EBV Antibody Panel • EBVIgG/ IgM • EBV Serology • EBV Titers
Methodology:	Enzyme-Linked Immunosorbent Assay (ELISA)
Testing Schedule:	Routine, 2 times per week
Report Available:	3-5 days
Specimen Requirements:
Minimum Volume:	2 mL serum
Container:	Gold top (serum separator) tube
Reference Range:
See interpretation chart EBV Profile Interpretation Chart VCA IgM VCA IgG EA EBN Interpretation N N N N No serological evidence of past, recent, or current EBV infection. Patient has not been infected, or if infected has not yet developed antibodies. Consideration of symptom onset with time of testing is important. A second “convalescent” specimen should be submitted in 10-14 days if results do not correlate with clinical presentation. P N N N Compatible with early acute primary EBV infection. This is an unusual pattern and may suggest very early seroconversion. Results should be interpreted in light of clinical presentation and a second “convalescent” specimen submitted in 10-14 days may be helpful. Heterotypic antibody responses associated with CMV or HSV cannot be ruled out at this time P P P/N N Compatible with acute primary EBV infection. P P P/N P Compatible with recent EBV infection. N P P/N N Compatible with recent EBV infection. Results should be interpreted in light of clinical presentation. In adults, EBV serologic patterns such as these may suggest long past infection with possible loss of EBNA reactivity. N P P/N P Compatible with past EBV infection. When performed on children <3 months of age, pattern may suggest reactions due to maternal antibodies and cannot be interpreted without a second “convalescent” specimen submitted in approximately 1 month.
Clinical Utility:
Primary EBV infection is shown with IgM-VCAappearing first, accompanied by rising IgG-VCAantibody levels and the appearance of antibody to Early Antigen. If both IgG-VCA and EBNA antibodies are present, past infection is indicated.

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Epstein Barr Virus, PCR, Cerebrospinal Fluid		Test Code: EBVPR
CPT:	87799
Alternate Name:	EBV, PCR, CSF
Methodology:	Real Time PCR
Testing Schedule:	Routine, daily
Report Available:	1-3 days
Specimen Requirements:
Minimum Volume:	1.0 mL cerebrospinal fluid, frozen
Container:	Sterile conical tube
Special Instructions and/or Comments:
• Refrigerate NOTE: Specimen must be frozen within 8 days of collection.
Reference Range:
<200 copies/mL
Clinical Utility:
Quantitates Epstein-Barr viral DNA down to 200 copies/mL in CSF to assist in distinguishing latent from acute infection (or reactivation). The virus is usually undetected in the majority of EBV IgG positive samples, but is readily detected in acute infections, usually becoming positive well before other diagnostic methods.

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Equagesic®
See Meprobamate

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Equanil®
See Meprobamate

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Erythrocyte Osmotic Fragility
See Osmotic Fragility, Erythrocyte

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Erythrocyte Sedimentation Rate
See Sedimentation Rate, Westergren,Whole Blood

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Erythropoietin		Test Code: ERYP
CPT:	82668
Alternate Name:	Epogen®; EPO
Methodology:	Chemiluminescent Immunoassay
Testing Schedule:	Routine, 1 time per week
Report Available:	5-7 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Centrifuge, transfer to plastic aliquot tube and freeze. Once frozen, transport specimen submerged in dry ice.
Reference Range:
3.7-19.6 mIU/mL
Clinical Utility:
Patients suffering from most anemias will present with higher than normal concentrations of serum-erythropoietin; whereas, those suffering from anemia associated with chronic renal failure may have values within the normal range. Abnormally high concentrations may also be induced by renal neoplasma, benign tumors, polycystic kidney disease, renal cysts,and hydronephrosis. May also be used in patients with HIV who are receiving AZT. HIV infected patients with serum erythropoietin levels <500mIU/mL may have their anemia corrected with exogenous erythropoietin administration; whereas, patients >500 mIU/mL are unlikely to respond to therapy.

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Escitalopram
See Lexapro

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Eskalith®
See Lithium, Serum

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ESR
See Sedimentation Rate, Westergren,Whole Blood

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Esterase Nonspecific
See Esterase Stain, Alpha-Naphthyl Acetate

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Esterase Stain, Alpha-Naphthyl Acetate		Test Code: NSE
CPT:	88319
Alternate Name:	Esterase Nonspecific; Nonspecific Esterase
Methodology:	Manual
Testing Schedule:	Routine, Monday-Friday only
Report Available:	2-4 days
Specimen Requirements:
Minimum Volume:	2 mL blood OR 2 bone marrow films
Container:	Lavender top (EDTA) tube
Collection:	Routine venipuncture OR bone marrow aspiration
Reference Range:
Results interpreted by Hematopathologist.
Clinical Utility:
Used to differentiate monocyticfrom granulocytic cells in acute leukemias.

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Estradiol, Serum		Test Code: ESTR
CPT:	82670
Methodology:	Direct Chemiluminescence
Testing Schedule:	Routine, STAT testing available 0600-2100
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
• Testing must be performed within 8 hours ofcollection. • If delay in transport, centrifuge, transfer to plastic aliquot tube and refrigerate tube in the upright position. • Specimen should remain capped until time of testing.
Reference Range:
•Menstruating Females: (by day in cycle relative to LH peak) • Follicular Phase ..........(-12): 11-69 pg/mL ..........(-4):63-165 pg/mL • Midcycle ..........(-1): 146-526 pg/mL • Luteal Phase ..........(+2):33-150 pg/mL ..........(+6):68-196 pg/mL ..........(+12):36-133 pg/mL •Postmenopausal: ............<38 pg/mL •Males:...............................<53 pg/mL
Clinical Utility:
Used to evaluate the function of the ovaries, placenta, or adrenal glands; evaluate menstrual irregularities and infertility.

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Estriol, Unconjugated		Test Code: UES3
CPT:	82677
Methodology:	ICMA
Testing Schedule:	Routine, 3 times per week
Report Available:	4-6 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
NOTE: Use this test for males and nonpregnant females only.
Reference Range:
•Male (adult):..............................< 0.04 ng/mL •Female (non-pregnant):.............< 0.05 ng/mL
Clinical Utility:
Unconjugated estriol levels are usually lower than normal in pregnancies when the fetus is small or in poor condition. Maternal estriol levels usually fall dramatically immediately before intrauterine fetal death, reaching very low values shortly afterwards

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Estrogen, Total		Test Code: ESTG
CPT:	82672
Methodology:	Radioimmunoassay (RIA)
Testing Schedule:	Routine, 3 times per week
Report Available:	3-5 days
Specimen Requirements:
Minimum Volume:	2 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
•Male: Prepubertal:...................<40.0 pg/mL Adults:...........................<200pg/mL •Female: Prepubertal:...................<40.0 pg/mL Postmenopausal:...........<40.0 pg/mL •HMG treatment: Therapeutic:.....................400-800 pg/mL Cycle 1-10 days:................61-394 pg/mL Cycle 11-20 days:...........122-437 pg/mL Cycle 21-30 days:...........156-350 pg/Ml
Clinical Utility:
Evaluate for ovarian estrogen producing tumor in the premenarcheal and postmenopausal female; evaluate estrogen excess in males. Estrogen analysis may be helpful in establishing time of ovulation and optimal time for conception. Serial samples must be collected over sereral days to evaluate baseline and peak total estrogen levels. menopausal female; evaluate estrogen excess in males. Estrogen analysis may be helpful in establishing time of ovulation and optimal time for conception.Serial samples must be collected over sereral days to evaluate baseline and peak total estrogen levels.

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Estrogens, Fractionated		Test Code: FREST
Includes:	• Estradiol (E2) • Unconjugated Estriol (E3) • Estrone
CPT:	82671
Alternate Name:	Fractionated Estrogens
Methodology:	See individual test listings
Testing Schedule:	Routine, daily
Report Available:	2-5 days
Specimen Requirements:
Minimum Volume:	2 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
See report.

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Estrone		Test Code: ESTRO
CPT:	82679
Methodology:	Radioimmunoassay (RIA)
Testing Schedule:	Routine, 3 times per week
Report Available:	5-7 days
Specimen Requirements:
Minimum Volume:	2 mL serum
Container:	Gold top (serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
•Female: Prepubertal:.....................<15 pg/mL •Pregnancy: 1st Trimester.....................60-715 pg/mL 2nd Trimester...................170-1860 pg/mL 3rd Trimester...................1040-3210 pg/mL •Postmenopausal: *with ERT.......................40-345 pg/mL *without ERT..................15-105 pg/mL •Estrogen Replacement Therapy (ERT*): •Oral Contraceptives:.......25-85 pg/mL •Follicular Phase...............35-140 pg/mL •Luteal Phase:...................50-115 pg/mL •Peri-Ovulatory:..............60-230 pg/mL •Male: Prepubertal.....................<15 pg/mL Adult Male.......................15-65 pg/mL
Clinical Utility:
Useful for evaluating ovarian function.Increased Estrone levels may be associated with increased levels of circulating androgens and their subsequent peripheral conversion.

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Ethanol
See Alcohol, Serum or Plasma

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Ethosuximide		Test Code: ETHSX
CPT:	80168
Alternate Name:	Zarontin®
Methodology:	Immunoassay (IA)
Testing Schedule:	Routine, Monday-Friday only
Report Available:	3-5 days
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Red top (no serum separator) tube
Special Instructions and/or Comments:
Refrigerate
Reference Range:
Therapeutic concentration:......................40-100 mcg/mL Toxic concentration:.............................. > 100 mcg/mL
Clinical Utility:
Useful for monitoring therapy and assessing toxicity.

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Ethyl Alcohol
See Alcohol, Serum or Plasma

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Ethyl Alcohol, Urine
See Alcohol, Urine

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Ethylene Glycol		Test Code: ETHG
Includes:	• Ethylene glycol • Glycolic acid
CPT:	82693
Alternate Name:	Antifreeze
Methodology:	Gas Chromatography (GC)
Testing Schedule:	Routine, STAT testing available
Report Available:	1 day
Specimen Requirements:
Minimum Volume:	1 mL serum
Container:	Red top tube, no serum separator
Reference Range:
Negative NOTE: Any amount may be potentially toxic.
Clinical Utility:
Useful for confirming and monitoring ethyleneglycol toxicity.

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ETOH
See Alcohol, Serum or Plasma

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Extractable Nuclear Antigen Profile
See ENA Autoantibody Profile