2013, Number 6
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Rev Invest Clin 2013; 65 (6)
Acute kidney injury in cardiac surgery
Moguel-González B, Michael Wasung-de-Lay , Tella-Vega P, Riquelme-Mc-Loughlin C, Villa AR, Madero M, Gamba G
Language: English
References: 26
Page: 467-475
PDF size: 156.52 Kb.
ABSTRACT
Introduction. Acute kidney injury (AKI) associated with
cardiac surgery is a common postoperative complication that
increases the morbidity and mortality substantially. However,
there is limited information of AKI after cardiac surgery in
our institution.
Material and methods. We conducted a
prospective, observational, and longitudinal analysis of adult
patients that underwent to cardiac surgery requiring
cardiopulmonary bypass and aortic cross clamp. Patients with
preoperative chronic renal insufficiency that were on dialysis,
with AKI detected up to 24 h before the procedure, or that
received contrast agents 72 h before surgery were excluded.
AKI was defined by the AKIN classification. Patients were
followed up to 7 days after surgery or before if discharged
from the intensive care unit. We analyzed age, sex, body mass
index (BMI), co-morbilities, previous cardiac surgery, left
ventricular ejection fraction, New York Heart Association
class, type of procedure, cardiopulmonary bypass time, cross
clamp time and bleeding.
Results. Our analysis included
164 patients submitted to cardiac surgery. In the follow
up, 84% did not have AKI, 11% had AKIN 1 and 2
accompanied by increase in serum creatinine and 6% had
AKIN 3. Patients with AKI were older, had a higher
preoperative creatinine, plasma glucose level, and a lower left
ventricular ejection fraction. All together patients with AKIN
had a longer hospital stay and a higher mortality (p
‹ 0.001).
The preoperative use of insulin was associated with the
development of AKI, and there was a higher number of
patients with a New York Heart Association class III and IV
for heart failure in the more sever forms of AKI (p = 0.01).
The logistic regression analysis revealed that patients with a
high preoperative blood urea nitrogen (› 20 mg/dL) creatinine
level (› 1 mg/dL), uric acid (› 7 mg/dL) and lower albumin
(
‹ 4 g/dL) or lower intraoperative hemoglobin (
‹ 8 g/dL) had
a higher risk for postoperative AKI.
Conclusions. The
prevalence of AKI in our Institute is of 17%. Patients with
AKIN 2 and 3 had a higher mortality and a longer stay in the
intensive care unit. The major risk factors for AKI
development were identified.
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