Response Letter to the editor.

We thank the author Hewson1 for his interest in our article2 and his comments. Patient-led propofol sedation in various context has repeatedly been shown to be a useful method for sedation regarding the clinical outcome. By the addition of a health economic perspective, our results strengthen this conclusion. In our article, based on two randomized controlled studies, we did not measure time from start of sedation to start of procedure. Instead, we added 5 minutes for the start/preparation respectively completion/dismantling of the procedure (10 minutes in total) to the measured procedural time. Our main finding that PCS is a cost saving method was primarily based on reduced costs for hospital stay and avoidance of aborted procedures that had to be repeated.