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The page below is a sample from the LabCE course Minimizing Pre-Analytical Variability During Venipuncture and Urine Sample Collection Processes. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Sleep

Many hormones are affected by sleep deprivation, including thyroid stimulating hormone (TSH) and thyroxine (T4), related to the disruption in the circadian rhythm.
Studies have also found that sleep deprivation is associated with higher white blood cell (WBC) counts and absolute neutrophil counts, and significantly shorter hemostasis parameters, including prothrombin time (PT) and thrombin time.
The lack of restorative sleep results in stress, a variable that will be discussed in greater detail on the next slide.