Acute Kidney Injury After Cardiac Surgery - Risk Factors for Renal Replacement Therapy

Abstract Background and Aims Acute kidney injury (AKI) is a frequent complication after cardiac surgery. Its incidence ranges from 19 to 44% depending on the study and which definition is used. There are some well-known risk factors associated with AKI, including baseline patient characteristics (age and comorbidities), need of perioperative blood transfusion or presence of previous chronic kidney disease. We wanted to evaluate if a nephrologist management and control of potential risk factors of renal disease can be used to prevent AKI, thereby minimizing the risk of need RRT, reducing costs and improving survival in these patients. It will be the first study focused on this intervention. The aim of this study is to assess if a nephrology intervention before cardiac surgery can reduce the postoperative incidence of AKI. Method Unicentric prospective randomized controlled trial of 298 participants from 2015 to 2019. The inclusion criteria was patients undergoing scheduled cardiac surgery of > 18 years old. The exclusion criteria was a requirement for renal replacement therapy before surgery. Clinical Research Ethics Committee of Bellvitge has approved the study before initiation. All patients have given written informed consent. We have done an intention-to-treat analysis, continuous variables have been compared between groups using Student's t test and categorical variables using X2. Results Nephrology intervention before surgery, included a preoperative study done minimum 1 month before the surgery to optimize the patient’ s overall condition by optimization of hydration state, remove or minimize dose of drugs that potentially deteriorate kidney function and correct metabolic disorders. No differences in the characteristics of the patients between groups was found (Table 1). The number of patients with AKI were 49 without differences between groups (0.112), with most of them presenting a stage 1 AKI, only 3 patients present a stage 3 AKI, but none of them required renal replacement therapy (Table 2). We found 1.3% of mortality (1 participant in the intervention group and 3 in control group). Data at 1 year follow-up (n= 144) showed low incidence of kidney disease (creatinine in intervention arm 91.87±30.79μmol/L and in control arm 87.08±23.58, p=0.292) without differences in albuminuria. Conclusion In summary, we did not find any difference in acute kidney injury and death when a nephrology intervention is done to cardiac surgery patients, probably it would be necessary to increase the sample size to make conclusions. The results at 1 year follow-up showed no kidney disease in these patients.

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MO405RISC FACTORS FOR CARDIAC SURGERY-ASSOCIATED ACUTE KIDNEY INJURY IN A TERTIARY REFERRAL HOSPITAL

Nephrology Dialysis Transplantation ◽

10.1093/ndt/gfab082.0059 ◽

2021 ◽

Vol 36 (Supplement_1) ◽

Author(s):

Alvaro Lucas ◽

Alicia Molina Andujar ◽

Eduard Quintana ◽

Gaston Piñeiro ◽

Esteban Poch

Keyword(s):

Risk Factors ◽

Acute Kidney Injury ◽

Cardiac Surgery ◽

Renal Replacement Therapy ◽

Replacement Therapy ◽

Extracorporeal Circulation ◽

Kidney Injury ◽

Preventive Strategies ◽

Factors Associated ◽

Ischaemia Time

Abstract Background and Aims cardiac surgery-associated acute kidney injury (CS-AKI) is a frequent complication that confers significant increase in morbility and mortality. It is still unclear how to identify patients at high risk to develop it, in order to apply to them early preventive strategies to avoid AKI. The study aimed to explore risk factors associated to CS-AKI. Method to analyze the association between demographic, pre-operative and intraoperative variables with all grades-AKI, we collected baseline characteristics, type of surgery, aortic time of clampage and extracorporeal circulation time, hemodinamic variables during surgery, Euroscore II, Clevelant Clinic Score and Leicester cardiosurgery score. The post-operative variables included monitorization of the first 24 h in the Intensive Care Units (ICU), consistent in: use of vasoactive drugs, total diuresis, use of furosemide, need of transfusions and need and duration of renal replacement therapy (RRT). Creatinine was collected for all the admision days in order to calculate the incidence of AKI. Also mortality and need of RRT at 30 th day was assessed. The inclusion criteria were: patients over 18 years old who underwent cardiac surgery with extracorporeal circulation. Only valve substitution (VS), Coronary Artery Bypass Graft (CABG) or a combination of both procedures (not including endocarditis surgery) were included. Patients who were already in dialysis or suffered an AKI just before the surgery were not included in the study. Results we included 130 patients who underwent heart surgery intervention in Hospital Clínic de Barcelona from 1st January to 31 st March 2015. 61,5% were men and the majority of them was 60 - 75 years old (46.9%), with hypertension (80.8%), without diabetes (68.5%), with stage 2-Chronic Kidney Disease (53.1%). Main surgical procedure was CABG (50.8%), followed by valve substitution (36.1%) and combination of both (13.1%). 73,1% of the procedures were done electively and 26.9% urgently. Out of the 130 patients, 60 (46.2%) suffered an AKI (36 AKIN 1, 16 AKIN 2 and 8 AKIN3). The majority of the episodes (55.2%) started between 24 and 48 hours after the intervention and 7 patients required RRT. AKI was not associated with mortality or need of renal replacement therapy at 30 days (OR 1.853, p= 0.397). Regarding risk factors for CS-AKI, basal eGFR <60 ml/min, history of hypertension, age and the clevelant/leicester and euroscore were preoperative risk factors associated with CS-AKI in our cohort (OR 5.571 p=<0.001; OR 2.621 p=0.043; OR 1.036 p<0.001; OR 1.453 p=0.045; OR 1.062 p<0.001; OR 1.351 p=0.006 respectively). Leicester cardiosurgery score >30 was the score who showed the best association with AKI (OR 5.167, p<0.001). Intraoperative significant risk factors that were identified were: ischaemia time over 70 minutes (OR 2.876, p=0.004), and the need to use phenylephrine (3.064, p=0.015); whereas the need to use nitroglycerin was identified as a protector (OR 0.441, p=0.031). Conclusion previous eGFR<60 ml/min, age, hypertension, use of phenylephrine during surgery and long ischaemia time are the main factors associated with CS-AKI. Scores like Leicester score can help physicians to identify people at risk and apply preventive strategies.

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Perioperative risk factors for delirium development after elective cardiovascular surgery

Patologiya krovoobrashcheniya i kardiokhirurgiya ◽

10.21688/1681-3472-2020-2-83-94 ◽

2020 ◽

Vol 24 (2) ◽

pp. 83

Author(s):

V. V. Pasyuga ◽

D. A. Demin ◽

I. L. Nudel ◽

E. V. Demina ◽

A. V. Kadykova ◽

...

Keyword(s):

Risk Factors ◽

Mechanical Ventilation ◽

Acute Kidney Injury ◽

Cardiac Surgery ◽

Renal Replacement Therapy ◽

Replacement Therapy ◽

Conflict Of Interest ◽

Kidney Injury ◽

Perioperative Risk ◽

Perioperative Risk Factors

Aim. This study was conducted to determine the incidence of delirium after cardiac surgery and its effect on the length of the patient’s stay in the ICU and to identify the perioperative risk factors. Methods. This research was a retrospective assessment of 1941 medical records and the course of the perioperative period in patients subjected to elective cardiac surgery. Results. Delirium developed in 193 cases (9.94%); whereas, hyperactive, hypoactive and mixed delirium was observed in 13%, 43% and 44% of the patients, respectively. Most often (26% of the cases), delirium occurred after complex combined surgeries. Independent risk factors for the development of delirium were older age (OR 1.041, 95% CI [1.002–1.081], p = 0.038), EuroSCORE II score (OR 1.286, 95% CI [1.093–1.731], p = 0.025), acute kidney injury (OR 1.306, 95% CI [1.107–1.942], p = 0.0018) and renal replacement therapy (OR 1.399 95% CI [1.361–2.792], p = 0.001). Cardiopulmonary bypass duration and time of clamping of the aorta, postoperative serum creatinine level, need for blood transfusions and duration of mechanical ventilation and duration of ICU stay were identified as predictors and were also significantly higher in the delirium group. Delirium was closely associated with critical illness polyneuropathy (OR 9.201, 95% CI [2.13–38.826], p < 0.001) and neurogenic dysphagia (OR 7.48, 95% CI [1.12–56.07], p = 0.022). Conclusion. The key factors for delirium development in the postoperative period include advanced age, high EuroSCORE II scale and acute kidney injury requiring continuous renal replacement therapy. Delirium significantly increases the duration of mechanical ventilation and the duration of ICU stay.Received 30 January 2020. Revised 18 March 2020. Accepted 24 March 2020.Funding: The study did not have sponsorship.Conflict of interest: Authors declare no conflict of interest.Author contributions Conception and design: V.V. Pasyuga, I.N. Leiderman Data collection: D.A. Demin, E.V. Demina, I.L. Nudel, V.V. Pasyuga Data analysis: V.V. Pasyuga, I.N. Leiderman, D.A. Demin, D.G. Tarasov Drafting the article: V.V. Pasyuga, D.A. Demin Critical revision of the article: I.N. Leiderman, A.V. Kadykova Final approval of the version to be published: V.V. Pasyuga, D.A. Demin, I.L. Nudel, E.V. Demina, A.V. Kadykova, D.G. Tarasov, I.N. Leiderman

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Safety of Argatroban in critically ill patients with acute kidney injury and renal replacement therapy after cardiac surgery

The Thoracic and Cardiovascular Surgeon ◽

10.1055/s-0030-1269141 ◽

2011 ◽

Vol 59 (S 01) ◽

Author(s):

M Klingele ◽

A Lerner-Gräber ◽

D Fliser ◽

HJ Schäfers ◽

H Groesdonk

Keyword(s):

Acute Kidney Injury ◽

Cardiac Surgery ◽

Renal Replacement Therapy ◽

Replacement Therapy ◽

Critically Ill ◽

Critically Ill Patients ◽

Kidney Injury

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Preoperative Low Serum Albumin Levels Increase the Requirement of Renal Replacement Therapy after Cardiac Surgery

The Heart Surgery Forum ◽

10.1532/hsf.1577 ◽

2016 ◽

Vol 19 (3) ◽

pp. 123 ◽

Cited By ~ 7

Author(s):

Orhan Findik ◽

Ufuk Aydin ◽

Ozgur Baris ◽

Hakan Parlar ◽

Gokcen Atilboz Alagoz ◽

...

Keyword(s):

Acute Kidney Injury ◽

Regression Analysis ◽

Cardiac Surgery ◽

Renal Replacement Therapy ◽

Serum Albumin ◽

Replacement Therapy ◽

Kidney Injury ◽

Preoperative Serum ◽

Group I ◽

Group Ii

Background: Acute kidney injury is a common complication of cardiac surgery that increases morbidity and mortality. The aim of the present study is to analyze the association of preoperative serum albumin levels with acute kidney injury and the requirement of renal replacement therapy after isolated coronary artery bypass graft surgery (CABG). Methods: We retrospectively reviewed the prospectively collected data of 530 adult patients who underwent isolated CABG surgery with normal renal function. The perioperative clinical data of the patients included demographic data, laboratory data, length of stay, in-hospital complications and mortality. The patient population was divided into two groups: group I patients with preoperative serum albumin levels <3.5 mg/dL; and group II pateints with preoperative serum albumin levels ≥3.5 mg/dL. Results: There were 413 patients in group I and 117 patients in group II. Postoperative acute kidney injury (AKI) occured in 33 patients (28.2%) in group I and in 79 patients (19.1%) in group II. Renal replacement therapy was required in 17 patients (3.2%) (8 patients from group I; 9 patients from group II; P = .018). 30-day mortality occurred in 18 patients (3.4%) (10 patients from group I; 8 patients from group II; P = .037). Fourteen of these patients required renal replacement therapy. Logistic regression analysis revealing the presence of lower serum albumin levels preoperatively was shown to be associated with increased incidence of postoperative AKI (OR: 1.661; 95% CI: 1.037-2.661; P = .035). Logistic regression analysis also revealed that DM (OR: 3.325; 95% CI: 2.162-5.114; P = .000) was another independent risk factor for AKI after isolated CABG. Conclusion: Low preoperative serum albumin levels result in severe acute kidney injury and increase the rate of renal replacement therapy and mortality after isolated CABG.

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