Final answer:
There are several mistakes that can falsely decrease kt/v in a lab draw, such as using a small sample size, failing to mix the sample properly, and using contaminated dialysis fluid.
Step-by-step explanation:
There are several mistakes that can falsely decrease kt/v in a lab draw. One common mistake is using a small sample size, which may not accurately represent the true value of kt/v. Another mistake is failing to properly mix the sample, which can lead to uneven distribution of solutes and an incorrect measurement of kt/v. Additionally, using a contaminated or compromised dialysis fluid can also result in a falsely decreased kt/v value.