OBJECTIVE: The Cumulative Summation of Differences (CUSUM) is a recommended
method for determining the consistency of one lot of Activated Partial Thromboplastin Time …

This study was conducted to compare the performance of 2 different lots of activated partial
thromboplastin time (APTT) reagent from the same manufacturer. Two hundred plasma …

Activated partial thromboplastin times accumulated from two proficiency testing surveys
were analyzed to determine simultaneously the effects of the method and reagent used …

In an international collaborative study three candidate reference and the local APTT reagent
have been tested with lyophilized plasmas containing heparin added in vitro and fresh …

Citrated samples from 100 patients on iv heparin and 20 normal patients were tested with
three batches each of three activated partial thromboplastin time (APTT) reagents …

Abstract The Activated Partial Thromboplastin Time (APTT) is used for a variety of reasons,
including (i) as a screening test to assess potential deficiencies within patient plasmas of …

Background For the lack of standardized activated partial thromboplastin time (APTT), it has
been pointed out that there are differences in values among several reagents. Recently, we …

In a study published in 1972, Basu and associates reported that heparin doses that
prolonged an APTT to 1.5–2.5 times control were associated with a reduced risk for …

Study Objective. To measure the difference in therapeutic ranges of activated partial
thromboplastin time (APTT) between two laboratory devices. Design. Prospective, controlled …

Regardless of how President Clinton might define “is,” the monitoring of anticoagulation in
clinical practice and research is problematic. It has been in the past, it is now, and will …