L
| TEST NAME | LAB CODE # |
| Lactate Dehydrogenase (LDH), Serum | 0117-2 |
Spec: 2 mL serum. AVOID HEMOLYSIS. DO NOT FREEZE.
Ref: 94 - 250 IU/mL
Meth: Enzymatic Analysis
| Lactate Dehydrogenase Isoenzymes (LDH) Isoenzymes, Serum | 0550-4 |
Spec: 3 mL serum. AVOID HEMOLYSIS. DO NOT FREEZE.
Ref: LDH 1: 20 - 30%
LDH 2: 25 - 45%
LDH 3: 10 - 25%
LDH 4: 0 - 12%
LDH 5: 0 - 12%
Meth: Electrophoresis
| Lactose Tolerance Test | 1178-3 |
Spec: 6 Grey Top tubes (Sodium fluoride). Draw baseline. After a 50g dose of lactose, draw 15 min., 30 min., 60 min. 90 min., and 120 min. specimens. Indicate time collected on each tube. Submit all specimens with one requisition. Patient has to be in a fasting state.
Ref: Patients with lactose deficiency will show a peak rise of <20 mg/dL measured as glucose.
Meth: Enzymatic Analysis
| LDL Cholesterol Low Density Lipoprotein, Direct Determination | 2194-6 |
Spec: 1 mL serum.
Ref: <130 mg/dL Desirable
>130 - 159 mg/dL Borderline, High Risk
> 160 mg/dL High Risk
Meth: Spectrophotometric Assay, Immunoassay.
| Lead, Blood, Child | 0398-8 |
Spec: 1 green top or 1 lavender top tube
Ref: 0 - 10 mg/dL
Meth: Atomic absorption.
Note: Submit separate tube to minimize contamination. The Center for Disease Control recommends that Class I (<9 mcg/dL) children are considered as low risk.
| Lead, Urine, 24 hr. | 0808-6 |
Spec: Aliquot of 24 hr. urine, record total volume.
Ref: <80 mcg/24 hrs.
Meth: Atomic Absorption Spectroscopy
| Legionella Antibody, Serum | 0569-4 |
Spec: 2 mL serum. Paired sera, 2 - 3 weeks apart, are advisable to detect rising titers. Submit each sample with a separate requisition. Price listed in Fee Schedule is for one test.
Ref: By report
Meth: Immunoassay
| Leptospira Antibodies, IgG, IgM Serum | 0669-2 |
Spec: 1 mL Serum
Ref: Negative
Meth: Immunoassay
| Leptospira Culture | 0336-8 |
See Culture, Leptospira
| Leukocyte Alkaline Phosphatase (LAP) | 0326-9 |
Spec: 5 mL Heparinized whole blood (minimum 1 mL). fresh slides from fingr-stick acceptable
Ref: Score: 20 - 137 units
Meth: Histochemical Assay
Note: Test is valuable in distinguishing chronic myelogenous leukemia from leukemoid reactions and other myeloproliferative disorders.
| Leukemia/Lymphoma Comprehensive Panel, Flow ) | 5500-4 |
Spec: 0.3g of Tissue in RPMI 1640 or 5 mL of Blood or 2 mL of Bone Marrow,
Heparin Anticoagulant or ACD. DO NOT REFRIGERATE OR FREEZE.
Ref: See Lab Report
Meth: Flow Cytometry
| Lipase, Serum | 0521-5 |
Spec: 1 mL serum
Ref: 0 - 190 U/L
Meth: Enzymatic Assay
| Lipid Associated Sialic Acid (LASA) | 0186-8 |
Spec: 2 mL Frozen EDTA Plasma
Ref: <20 mg/dL
Meth: Spectrophotometric Assay
| Lipids, Stool, 72 Hr. Collection (Fecal Fat) | 0522-3 |
Spec: Stool (24, 48, 72 Hr. Collection acceptable)
Ref: Negative
Meth: Microscopic exam
*Do not send entire specimen. Indicate total weight and time of collection.
| Lipoprotein Electrophoresis | 0551-2 |
See Electrophoresis, lipoprotein
| Lithium, Serum | 0119-8 |
Spec: 2 mL serum
Ref: Therapeutic Range: 0.6 - 1.2 mmol/L
Toxic Range: > 1.5 mmol/L
Half-Life: 18 - 36 hours
Meth: Ion Selective Electrode
| Lupus Anticoagulant | 0387-1 |
Spec: 1 blue top tubes (Sodium Citrate). Invert tube six times immediately after drawing. Room temperature- 15 min. centrifuge and pour off plasma. FREEZE.
Ref: Negative
Meth: Photo-optical clot detection
| Luteinizing Hormone (LH), Serum or Plasma | 0342-6 |
Spec: 1 mL Serum or EDTA plasma
Ref: Female:
Follicular Phase, 1.47 - 15.52 mIU/mL
Mid-cycle Peak, 11.4 - 79.67 mIU/mL
Luteal Phase, 0.98 - 16.23 mIU/mL
Post Menopausal, 11.13 - 65.07 mIU/mL
Male: 2.57 - 10.13 mIU/mL
Meth: Immunoassay
| Lyme Disease Antibody (IgG/IgM), Serum | 0568-6 |
Spec: 2 mL serum
Ref: < 0.8 Units
Meth: Immunoassay
| Lyme Disease Antibody IgM, Immunoassay, Serum | 1615-4 |
Spec: 1 mL serum
Ref: <0.8 Units
Meth: Immunoassay
| Lyme Disease Antibody (Western Blot) IgG, Serum | 0866-4 |
Spec: 1 mL serum
Ref: Not detected
Meth: Electrophoretic Analysis
| Lyme Disease Antibody (Western Blot) IgM, Serum | 0373-1 |
Spec: 1 mL serum
Ref: Not Detected
Meth: Electrophoretic Analysis