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Fig. 3 | BMC Anesthesiology

Fig. 3

From: Evaluation of early postoperative intravenous opioid rescue as a novel quality measure in patients who receive thoracic epidural analgesia: a retrospective cohort analysis and prospective performance improvement intervention

Fig. 3

Phased process control chart of monthly PACU-OpResc. Phased statistical process control chart (p-chart) of PACU-OpResc as a proportion of monthly TEA. Middle horizontal line reflects the weighted average PACU-OpResc rate before (22.2%) and after (13.9%) implementing SLC documentation. Upper and lower horizontal lines reflect the upper and lower 3σ control limits for each month, respectively. Vertical line marks the implementation of SLC documentation (May 2019). Sample size (TEA placements) was insufficient to determine the lower control limit during April 2018 and January 2019, therefore the zero-PACU-OpResc rate in these months is not considered to be “special cause”. PACU: Post Anesthesia Care unit; PACU-OpResc: Intravenous opioid rescue analgesia in the post-anesthesia care unit; SLC: Sensory level check; TEA: Thoracic Epidural Analgesia

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BMC Anesthesiology

ISSN: 1471-2253

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