Figure 20.13 Bacteria in CSF.

5. Coagulation samples are good for 24 hours at room temperature or refrigerated.

Quality Control

1. Coagulation controls are of the laboratory's choice. Follow manufacturer's instructions for reconstitution and stability.

2. Coagulation controls are run at the beginning of each shift.

3. If quality control is out, repeat if necessary If still out, troubleshoot and/or notify supervisor.


1. Prepare reagents and controls.

2. Place reagents and control inside analyzer.

3. Replenish any other materials.

4. Run quality control.

5. Verify quality control; repeat any controls if necessary and document any abnormal controls.

6. Load centrifuged specimen onto instrument with cap removed.

7. Press "Start."

8. The instrument places 50 pL of the patient's plasma into a cup, incubates the sample for 3 minutes, and 100 pL of thromboplastin is added (Fig. 20.14).


1. Follow steps 1 through 7 in the PT procedure.

2. The instrument places 50 pL of the patients plasma into a cup, incubates for 1 minute,

316 PartV • Laboratory Procedures

Figure 20.11 Histiocyte in peritoneal fluid.

Figure 20.13 Bacteria in CSF.

Figure 20.12 Mesothelial cell in pleural fluid.

Table 20.10 C

Normal Fluid Results

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