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HelpTest Code METH Methemoglobin
Specimen Requirements
| Fasting Required | Specimen Type | Preferred Container/Tube | Acceptable Container/Tube | Specimen Volume | Specimen Minimum Volume (allows for 1 repeat) |
Pediatric Minimum Volume (no repeat) |
|---|---|---|---|---|---|---|
| No | Whole blood | Non-Gel barrier tube, either: Lithium-heparin Green Top Tube (GTT) or Sodium-heparin Green Top Tube (GTT) | Heparinized Syringe | 5 mL | 3 mL | 200 uL Lithium-Heparin Microtainer/Sarstedt |
Collection/Processing Instructions
Tube specimen should be full and unopened.
Place specimen on wet ice and deliver specimen to Lab immediately after collection.
Indicate collection time.
Test should be performed within 4 hours of drawing, but will be accepted up to 24 hours.
Indicate collection time.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood | Ambient | 1 hour |
| Refrigerate | 24 hours |
Rejection Criteria
Samples >24 hours old
Samples collected in gel separator tubes
Test Information
MetHb will slowly revert to hemoglobin leading to lower values; accordingly slight elevations may not be detectable with prolonged delays (> 4 hrs) in receiving referred samples. Recovery of MetHb from blood samples stored on ice after delays of 8 hr. and 24 hr. is approximately 84% and 60% of the original value, respectively.
Reference Range Information
| Performing Location | Reference Range |
|---|---|
| All Performing Sites | All Ages: 0.0 - 1.5% Cyanosis occurs at methemoglobin levels > 10% of total hemoglobin. |
Marshfield Labs Performing Department
Marshfield Labs Urinalysis
Performing Information
| Performing Location | Day(s) Test Performed | Analytical Time | Methodology/Instrumentation |
|---|---|---|---|
| Beaver Dam | Monday through Sunday | Less than 2 hours | Gem 5000 |
| Weston | Monday through Sunday | Less than 2 hours | Co-oximeter Multi-wavelength Spectrophotometry/Radiometer |
| Park Falls | Monday through Sunday | Less than 2 hours | Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 |
| Marshfield | Monday through Sunday | Less than 2 hours | Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 |
| Minocqua | Monday through Sunday | Less than 2 hours | Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 |
| Neillsville | Monday through Sunday | Less than 2 hours | Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 |
CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 83050 |
Outreach CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 83050 |
Ordering Applications
| Ordering Application | Description |
|---|---|
| Cerner | Methemoglobin Level |