Cardiothoracic & vascular anesthesia

Incidence of phosphate abnormalities after cardiac surgery and their association with lactic acidosis: A cohort study from the Multicenter Perioperative Outcomes Group.

J Clin AnesthPublished Retrospective cohort study

An erratum to this article was published (J Clin Anesth, Sep 2026 ↗)

Authors' conclusion

Phosphate abnormalities in the immediate postoperative period after surgery with CPB are common and associated with a higher risk of severe lactic acidosis.

Study context

Population
Adults ≥18 years undergoing procedures with cardiopulmonary bypass (CPB), 45 Multicenter Perioperative Outcomes Group centers, 2015–2022, with phosphate and lactate within 6 h after surgery
Participants
34,953 adults · 45 centers
Exposure
Hypophosphatemia or hyperphosphatemia vs normal phosphate within 6 h after surgery
  • Hypophosphatemian = 6,863
  • Hyperphosphatemian = 5,013
Outcome
Severe lactic acidosis (lactate ≥4.0 mmol/L)
Methodological detailsmulticentre, multilevel logistic regression
  • Multicentre
  • Multilevel logistic regression

Main finding

As reported in the abstract

Severe lactic acidosis
Adjusted for confounders
Each group vs normal phosphateOdds ratio (95% CI)
Hypophosphatemia
1.46(1.33–1.60)
Hyperphosphatemia
1.30(1.16–1.45)

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)
Severe lactic acidosis, non-transplant patients with severe hypophosphatemia (phosphate <1.0 mg/dL) (subgroup)Severe hypophosphatemia vs Normal phosphate2.53 (1.76–3.63)

Original publication

Incidence of phosphate abnormalities after cardiac surgery and their association with lactic acidosis: A cohort study from the Multicenter Perioperative Outcomes Group. J Clin Anesth. Published 4 March 2026. doi:10.1016/j.jclinane.2026.112157

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