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Cardiac surgical patients exposed to heparin-bonded circuits develop less postoperative cerebral dysfunction than

L B Mongero1, J R Beck, H E Manspeizer

  • 1Department of Clinical Perfusion, The New York Presbyterian Medical Center, New York, USA. mongero@cpmail-am.cis.columbia.edu

Perfusion
|May 4, 2001
PubMed

Insights

Heparin-bonded circuits reduced cerebral dysfunction after cardiac surgery. This prospective trial found fewer abnormal neuropsychometric tests in patients using heparin-bonded cardiopulmonary bypass (CPB) circuits compared to non-heparin-bonded ones.

Area of Science:

  • Cardiovascular Surgery
  • Neuroscience
  • Biomaterials Science

Background:

  • Postoperative cerebral dysfunction is a concern following cardiac surgery.
  • The systemic inflammatory response is a potential contributor to this dysfunction.
  • Heparin-bonded circuits aim to mitigate inflammatory responses during cardiopulmonary bypass (CPB).

Purpose of the Study:

  • To compare the incidence of cerebral dysfunction in patients undergoing CPB with heparin-bonded versus non-heparin-bonded circuits.
  • To investigate the role of systemic inflammation in CPB-associated cerebral injury.
  • To evaluate the neurocognitive outcomes in cardiac surgery patients.

Main Methods:

  • Prospective randomized trial involving 39 elective coronary artery bypass (CABG) patients.
  • Neuropsychometric tests (NPMTs) administered preoperatively, and at 5 days and 6 weeks postoperatively.
  • Defined significant neurocognitive decline as a ≥25% decrease in NPMT performance from baseline.

Main Results:

  • Patients with heparin-bonded circuits showed a lower percentage of abnormal NPMTs (>1 abnormal test) at 5 days postoperatively (58% vs. 70%).
  • At 6 weeks postoperatively, fewer patients in the heparin-bonded group had abnormal NPMTs (36% vs. 63%).
  • The Mann-Whitney rank test was used for analysis.

Conclusions:

  • Heparin-bonded CPB circuits may reduce the incidence of cerebral injury in cardiac surgical patients.
  • Attenuating systemic inflammation with heparin-bonded circuits appears beneficial for neurocognitive outcomes.
  • Further research is warranted to confirm these findings and elucidate mechanisms.

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