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22520 Hematocrit

Hematocrit
Test Code: HCT
Synonyms/Keywords
​Packed cell volume​
Useful For
​Used to detect, confirm, monitor, or rule out a wide range of hematologic disorders, or to evaluate and manage the hematologic effects of treatments (radiation, chemotherapy, medications) or other conditions (illnesses and injuries).
Specimen Requirements

​

Fasting RequiredSpecimen TypePreferred Container/TubeAcceptable Container/TubeSpecimen VolumeSpecimen Minimum Volume
(allows for 1 repeat)		Pediatric Minimum Volume
(no repeat)
No​Whole Blood​EDTA Lavender Top Tube (LTT)​EDTA Pink Top Tube (PTT)​

2 mL​

One lavender top micro collection tube or 1 mL in 3 mL lavender​ top tube

One lavender top micro collection tube with  0.5 mL​
Royal Blue Top Tube (BD trace element, K2 EDTA)​

Collection Processing Instructions
Invert specimen at least 5-6 times in order to facilitate mixing and prevent coagulation.​
Specimen Stability Information
Specimen Type Temperature Time
Whole blood​ Ambient​ <24 hours​
Refrigerated​ <48 hours​
Refrigerated​ >48 hours may be reported with additional comments​
Rejection Criteria
Clotted
Grossly Hemolyzed​
Diluted with IV or tissue fluid​
Frozen​
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Beaver Dam
​Monday through Sunday
​Less than 2 hours
​Laser Flow Cytometry/Sysmex XN-2000 
​Chippewa Falls
 ​Monday through Friday ​Less than 2 hours​ ​Electrical Impediance/Beckman Coulter DXH600
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ​​​​Electrical Impediance/Beckman Coulter DXH600
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Ladysmith Medical Center ​Monday through Sunday ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Lakeview Medical Center ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
Marshfield​ ​Monday through Sunday​ ​Less than 2 hours​ ​Unicel Beckman Coulter DxH800​
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Neillsville​Monday through Sunday​​Less than 2 hours​​Electrical Impediance/Beckman Coulter DXH600
​Stevens Point ​Monday through Friday ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Wisconsin Rapids ​Monday through Friday ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
Test Information
​This test is included in CBC without differential (HGMP), CBC with Automated Differential (HGMPA) or CBC with Manual Differential (HGMPM).
Reference Range Information
Performing Location Reference Range
Marshfield​ Newborn (0-30 days): 44 - 70% 
             1-23 months: 32 - 42% 
                  2-9 years: 33 - 43%
Male       10-17 years: 36 - 47%
Female   10-17 years: 35 - 45%
Male        >=18 years: 38 - 51%
Female    >=18 years: 35 - 46% ​
See Critical Value List for list of current critical values.​ ​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
85014​ ​ ​ ​ ​
Synonyms/Keywords
​Packed cell volume​
Ordering Applications
Ordering Application Description
​Cerner ​Hematocrit
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements

​

Fasting RequiredSpecimen TypePreferred Container/TubeAcceptable Container/TubeSpecimen VolumeSpecimen Minimum Volume
(allows for 1 repeat)		Pediatric Minimum Volume
(no repeat)
No​Whole Blood​EDTA Lavender Top Tube (LTT)​EDTA Pink Top Tube (PTT)​

2 mL​

One lavender top micro collection tube or 1 mL in 3 mL lavender​ top tube

One lavender top micro collection tube with  0.5 mL​
Royal Blue Top Tube (BD trace element, K2 EDTA)​

Collection Processing
Invert specimen at least 5-6 times in order to facilitate mixing and prevent coagulation.​
Specimen Stability Information
Specimen Type Temperature Time
Whole blood​ Ambient​ <24 hours​
Refrigerated​ <48 hours​
Refrigerated​ >48 hours may be reported with additional comments​
Rejection Criteria
Clotted
Grossly Hemolyzed​
Diluted with IV or tissue fluid​
Frozen​
Useful For
​Used to detect, confirm, monitor, or rule out a wide range of hematologic disorders, or to evaluate and manage the hematologic effects of treatments (radiation, chemotherapy, medications) or other conditions (illnesses and injuries).
Reference Range Information
Performing Location Reference Range
Marshfield​ Newborn (0-30 days): 44 - 70% 
             1-23 months: 32 - 42% 
                  2-9 years: 33 - 43%
Male       10-17 years: 36 - 47%
Female   10-17 years: 35 - 45%
Male        >=18 years: 38 - 51%
Female    >=18 years: 35 - 46% ​
See Critical Value List for list of current critical values.​ ​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Beaver Dam
​Monday through Sunday
​Less than 2 hours
​Laser Flow Cytometry/Sysmex XN-2000 
​Chippewa Falls
 ​Monday through Friday ​Less than 2 hours​ ​Electrical Impediance/Beckman Coulter DXH600
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ​​​​Electrical Impediance/Beckman Coulter DXH600
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Ladysmith Medical Center ​Monday through Sunday ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Lakeview Medical Center ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
Marshfield​ ​Monday through Sunday​ ​Less than 2 hours​ ​Unicel Beckman Coulter DxH800​
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Neillsville​Monday through Sunday​​Less than 2 hours​​Electrical Impediance/Beckman Coulter DXH600
​Stevens Point ​Monday through Friday ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
​Wisconsin Rapids ​Monday through Friday ​Less than 2 hours​ ​​Electrical Impediance/Beckman Coulter DXH600
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
85014​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.