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Partial Thromboplastin Time, Activated

Partial Thromboplastin Time, Activated is a topic covered in the Davis's Lab & Diagnostic Tests.

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General

Synonym/Acronym:
aPTT, APTT.

Common Use:
To assist in assessing coagulation disorders and monitor the effectiveness of therapeutic interventions.

Specimen:
Plasma collected in a completely filled blue-top (3.2% sodium citrate) tube. If the patient’s hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted.

Normal Findings:
(Method: Clot detection) 25 to 35 sec. The aPTT is slightly prolonged in infants and children and is slightly shortened in older adults. Reference ranges vary with respect to the equipment and reagents used to perform the assay. For the patient on anticoagulants, therapeutic levels of heparin are achieved by adjusting the dosage so the aPTT value is 1.5 to 2.5 times the normal.

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Citation

Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Partial Thromboplastin Time, Activated." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425281/all/Partial_Thromboplastin_Time__Activated.
Bladh ML, Van Leeuwen AM. Partial Thromboplastin Time, Activated. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425281/all/Partial_Thromboplastin_Time__Activated. Accessed April 25, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Partial Thromboplastin Time, Activated. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425281/all/Partial_Thromboplastin_Time__Activated
Bladh ML, Van Leeuwen AM. Partial Thromboplastin Time, Activated [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 25]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425281/all/Partial_Thromboplastin_Time__Activated.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Partial Thromboplastin Time, Activated ID - 425281 A1 - Bladh,Mickey Lynn, AU - Van Leeuwen,Anne M, BT - Davis's Laboratory & Diagnostic Tests UR - https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425281/all/Partial_Thromboplastin_Time__Activated PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -