Final answer:
A lumbar puncture can lead to an infection as a post-procedure complication.
Step-by-step explanation:
A lumbar puncture, also known as a spinal tap, is a medical procedure which is used to sample cerebrospinal fluid (CSF) for testing. One post-procedure complication that a nurse should teach the client about is infection. Although rare, an infection can occur at the site of the lumbar puncture, leading to meningitis or other complications.