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Novel and Innovative Hybrid Technique for Type A Aortic Dissection
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Effects of dexmedetomidine on surgery for type A acute aortic dissection outcome

Yu-Ting Cheng1, Kuang-Tso Lee2, Chih-Hsiang Chang3,4

  • 1Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Chang Gung Memorial Hospital, Linkou Medical Center, Chang Gung University, Taoyuan City, Taiwan.

Scientific Reports
|February 18, 2022
PubMed

Insights

Postoperative dexmedetomidine infusion reduced severe acute kidney injury and dialysis needs in patients undergoing type A aortic dissection surgery. This is the first study to show dexmedetomidine

Area of Science:

  • Cardiovascular Surgery
  • Anesthesiology
  • Nephrology

Background:

  • Type A aortic dissection is a life-threatening condition requiring complex surgical intervention.
  • Postoperative complications, including acute kidney injury (AKI), significantly impact patient outcomes.
  • The role of dexmedetomidine in managing these patients remains largely uninvestigated.

Purpose of the Study:

  • To evaluate the effect of postoperative dexmedetomidine infusion on clinical outcomes in patients who underwent surgery for acute type A aortic dissection.
  • To assess the impact of dexmedetomidine on in-hospital mortality, composite outcomes, and specific renal complications.

Main Methods:

  • Retrospective analysis of 511 patients undergoing acute type A aortic dissection surgery (January 2014 - December 2018) from the Chang Gung Research Database.
  • One-to-two propensity score matching created comparable groups: 86 patients receiving postoperative dexmedetomidine and 158 not receiving it.
  • Primary outcomes included in-hospital mortality and a composite of all-cause mortality, AKI, delirium, atrial fibrillation, and respiratory failure.

Main Results:

  • No significant difference in in-hospital mortality or the composite outcome between the dexmedetomidine and non-dexmedetomidine groups.
  • Significantly lower incidence of Acute Kidney Injury Network stage 3 AKI in the dexmedetomidine group (8.1% vs. 19.0%; OR, 0.38; p=0.020).
  • Significantly lower risk of newly-onset dialysis in the dexmedetomidine group (4.7% vs. 13.3%; OR, 0.32; p=0.031).

Conclusions:

  • Postoperative dexmedetomidine infusion significantly reduces the risk of severe acute kidney injury and the need for new dialysis in patients after type A aortic dissection surgery.
  • Dexmedetomidine may offer a protective effect on renal function in this high-risk surgical population.
  • This study provides the first evidence supporting the use of dexmedetomidine for mitigating AKI in type A aortic dissection patients.

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