This step-by-step video clearly demonstrates the correct technique for the execution of the fundamental manual technique that constitutes the basis for the most commonly used assays in the diagnosis of bleeding disorders: the activated partial thromboplastin time (APTT). Supplementing the Lab Manual written protocol (Section 13), it also explains the theory behind the assay, details the important reagents, discusses the challenges posed by limited resources, and works through the interpretation of a series of typical diagnostic cases. The accompanying searchable transcript links to the individual sections of the video.

Instructions

Click on the player below to start the video, make sure that your computer speakers are turned on to hear the narration. Below the player is a searchable transcript. Enter a keyword in the search field to identify all the points in the script where it is mentioned. Click on the preceding section title to jump to that point in the video. A list of abbreviations can be found at the end of transcript. Click on the icon below to download Section 13 of the Lab Manual: Activated Partial Thromboplastin Time (APTT).