Regional anesthesia

Hypotension duration and vasopressor requirements following intrathecal oxytocin for Total hip arthroplasty: Secondary analysis of a randomized controlled trial

J Clin AnesthPublished Secondary analysis of a randomised controlled trial

Authors' conclusion

The administration of 100 μg of intrathecal oxytocin does not significantly impact the duration of hypotension or the need for vasopressor agents when given as a component of a spinal anesthetic.

Study context

Population
Patients undergoing primary total hip arthroplasty under spinal anesthesiaincluded in the analysis
Participants
90 patients
Comparison
Intrathecal oxytocin 100 μg vs placebo with spinal anaesthetic
  • Oxytocinn = 44
  • Placebon = 46reference
Primary endpoint
Duration of hypotension (minutes with MAP < 65 mmHg) and cumulative vasopressor requirements
Follow-up
Initial 60 min following spinal placement
Methodological detailsplacebo-controlled, prospective data supplemented with retrospective data
  • Placebo-controlled
  • Prospective data supplemented with retrospective data

Primary result

As reported in the abstract

Duration of hypotension · first 60 min

P = 0.476

Secondary outcomes

Cumulative vasopressor requirements (phenylephrine equivalents) · first 60 min after spinal placement

No difference in cumulative vasopressor requirements, oxytocin vs placebo: 1303 ± 883 vs 1156 ± 818 μg (phenylephrine equivalents)
P = 0.413
  • Co-primary outcome

Secondary outcomes (later hypotension durations and vasopressor requirements, perioperative fluids, physical therapy metrics, time to first opioid, cumulative opioid and verbal pain scores through 24 h)

No group differences for any secondary outcome

Original publication

Hypotension duration and vasopressor requirements following intrathecal oxytocin for Total hip arthroplasty: Secondary analysis of a randomized controlled trial. J Clin Anesth. Published 23 June 2023. doi:10.1016/j.jclinane.2023.111189

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