High Preoperative Plasma Neopterin Predicts Delirium After Cardiac Surgery in Older Adults

• Autores: Robert J. Osse, D. Fekkes, Joke H. M. Tulen, André I. Wierdsma, Ad J. J. C. Bogers, Rose C. Van der Mast, Michiel W. Hengeveld
• Localización: Journal of the American Geriatrics Society, ISSN 0002-8614, Vol. 60, Nº. 4, 2012, págs. 661-668
• Idioma: inglés
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• Resumen

  • Objectives: To examine the association between plasma levels of pterins and amino acids and postoperative delirium.

    Design: Prospective cohort study.

    Setting: Cardiothoracic service in an university hospital in Rotterdam, the Netherlands.

    Participants: One hundred twenty-five individuals aged 70 and older undergoing elective cardiac surgery.

    Measurements: Plasma pterins and amino acids were measured pre- and postoperatively. Using multiple logistic regression analyses, the associations between pterins and amino acid levels and postoperative delirium were examined in relation to age, sex, comorbidity, cognitive functioning (Mini-Mental State Examination (MMSE) score), and cardiac risk factors.

    Results: Delirium incidence in the main study group was 31.3%. The preoperative measures associated with delirium were neopterin (odds ratio (OR) = 1.05, P = .009); MMSE score less than 28 (OR = 4.39, P = .001); European System for Cardiac Operative Risk Evaluation score greater than 6 (OR = 2.84, P = .03); and combined coronary artery bypass graft (CABG) and aortic, mitral, or tricuspid valve surgery (OR = 4.32, P = .01). Postoperative measures associated with delirium were neopterin (OR = 3.84, P = .02), homovanillic acid (HVA, OR = 1.01, P = .04), and preoperative MMSE score less than 28 (OR = 3.32, P = .008).

    Conclusion: Preoperatively high neopterin levels predicted delirium after cardiac surgery in older adults, in addition to the well-known risk factors of poor cognitive function, high cardio-surgical risk, and combined CABG and valve surgery. Postoperative neopterin and HVA levels were also found to be associated with delirium, together with preoperative cognitive functioning. Plasma neopterin may be a candidate biomarker for delirium after cardiac surgery in these older adults.