Signature Library: Sample Forming a Crust


If a sample runs for an extended period of time, a crust may form on the top of the sample. This crust formation is captured on the Sonoclot Signature as an upward slope. This upward progression of the Sonoclot Signature will progress beyond the upper limit of the Clot Signal Scale setting. The example Sonoclot Signature shown here begins to form a crust at about 45 minutes. After 55 minutes the crust stiffened to the point that the Clot Signal was over 120.

There is no known clinical significance to a sample forming or not forming a crust. Low humidity contributes to quicker crust formation, as does weak clot retraction.

To avoid forming a crust, a drop of SonOil^TM may be applied over the top of the cuvette after the probe is immersed within the sample. To do this, the heat shield must be slid upward to allow access to the cuvette while the head assembly is down.

---

This website by Small Planet Solutions, LLC
This page was last modified on 10/26/07
Copyright ©1996-99 Sienco®, Inc. All rights reserved.
Sonoclot is a registered trademark of Sienco, Inc.
Sonoclot Analyzers are protected under US and foreign patents.