Fig. 1From: Anaesthetist-controlled versus patient-maintained effect-site targeted propofol sedation during elective primary lower-limb arthroplasty performed under spinal anaesthesia (ACCEPTS): study protocol for a parallel-group randomised comparison trialSPIRIT: Schedule of enrolment, intervention and assessments. THAL, Theatre admission lounge; PACU, Postoperative care unit; PMPS, patient-maintained propofol sedation; ACPS, anaesthetist-controlled propofol sedation)Back to article page