Inflammation risk before cardiac surgery and the treatment effect of intraoperative dexamethasone.

Patients who exhibit high systemic inflammation after cardiac surgery may benefit most from pre-emptive anti-inflammatory treatments. In this secondary analysis (n = 813) of the randomised, double-blind Intraoperative High-Dose Dexamethasone for Cardiac Surgery trial, we set out to develop an inflammation risk prediction model and assess whether patients at higher risk benefit from a single intraoperative dose of dexamethasone (1 mg/kg). Inflammation risk before surgery was quantified from a linear regression model developed in the placebo arm, relating preoperatively available covariates to peak postoperative C-reactive protein. The primary endpoint was the interaction between inflammation risk and the peak postoperative C-reactive protein reduction associated with dexamethasone treatment. The impact of dexamethasone on the main clinical outcome (a composite of death, myocardial infarction, stroke, renal failure, or respiratory failure within 30 days) was also explored in relation to inflammation risk. Preoperatively available covariates explained a minority of peak postoperative C-reactive protein variation and were not suitable for clinical application (R2 = 0.058, P = 0.012); C-reactive protein before surgery (excluded above 10 mg/L) was the most predictive covariate (P < 0.001). The anti-inflammatory effect of dexamethasone increased as the inflammation risk increased (-0.689 mg/L per unit predicted peak C-reactive protein, P = 0.002 for interaction). No treatment-effect heterogeneity was detected for the main clinical outcome (P = 0.167 for interaction). Overall, risk predictions from a model of inflammation after cardiac surgery were associated with the degree of peak postoperative C-reactive protein reduction derived from dexamethasone treatment. Future work should explore the impact of this phenomenon on clinical outcomes in larger surgical populations.

Mortality Reduction After a Preincision Safety Check Before Cardiac Surgery: Is It the Aorta?

OBJECTIVES: The introduction and use of a preincision safety check were associated with lower mortality after mixed adult cardiac surgery; however, an explanatory mechanism is lacking. Stroke, one of the most severe complications after cardiac surgery, with high mortality, may be reduced by adapting the surgical handling of the ascending aorta. This study assessed the prevalence and predictors of this adaptation after a preincision safety check and the subsequent effect on outcome. DESIGN: A prospective, single-center, observational study comparing adaptation with no-adaptation. The primary outcome measure was 30-day mortality. Multivariate analyses were performed to determine independent predictors of adaptation. To study the effect of adaptation on outcome, a propensity score-matched cohort was constructed in a 1:3 intervention:control ratio. SETTING: At Isala Zwolle (NL), a large, nonacademic teaching hospital. PARTICIPANTS: All consecutive cardiac surgery procedures from 2012 until 2015, including 4,752 surgeries. INTERVENTIONS: The adaptation of surgical handling of the ascending aorta. MEASUREMENTS AND MAIN RESULTS: In 283 cardiac surgeries (5.9%), adaptation was indicated. The most important independent predictors for adaptation were extracardiac atherosclerosis, current smoking, and increasing age. In the propensity score-matched cohort consisting of 1,069 procedures, there were no significant differences in outcome. After correction for propensity score, the hazard ratio of adaptation for 30-day mortality was 1.8 (0.85-3.79). CONCLUSIONS: The adaptation of aortic surgical handling after a preincision safety check was necessary for 5.9% of cardiac surgeries, with extracardiac atherosclerosis as the strongest predictor. Outcome was not significantly different between patients with and without adaptation. Although promising, it remains unclear whether adaptation may fully explain mortality reduction after the use of a preincision safety check.

Recovery of platelet-rich red blood cells and acquisition of convalescent plasma with a novel gravity-driven blood separation device.

OBJECTIVES: Our objectives were to determine the separation characteristics and blood product quality of a gravity-driven microfiltration blood separation system (HemoClear, The Netherlands). BACKGROUND: A range of centrifugal blood separation devices, including intraoperative cell salvage devices (cell savers) and apheresis machines, are available to assist in preparing both allogenic and autologous blood products. These devices are expensive to operate and require extensive training. METHODS AND MATERIALS: Nine whole blood units were collected under standard conditions and analysed for haematological parameters, thromboelastographic properties, platelet morphology and activation, and red blood cell (RBC) deformability and morphology. Three whole blood units were separated by means of the HemoClear device, into a liquid and cellular component. The cellular component was diluted with SAGM and cold stored for 14 days. To simulate cell salvage six whole blood units were diluted with isotonic saline, followed by multiple HemoClear separation rounds. RESULTS: The recovery of both RBCs (100 ± 1.6%) and white blood cells (99 ± 4.5%) after undiluted filtration were very high, while platelet recovery was high (83 ± 3.0%). During the filtration, and cold storage after filtration storage both the non-deformable RBC fraction and the RBC maximum elongation remained stable. Parameters of thromboelastography indicated that platelets remain functional after filtration and after 7 days of cold storage. In the cell salvage simulation the total protein load in the cellular fraction was reduced by 65 ± 4.1% after one washing round and 84 ± 1.9% after two consecutive washing rounds. CONCLUSION: The novel blood filter studied effectively separates whole blood into diluted plasma and platelet-rich RBCs. Moreover, the device effectively washed diluted whole blood, driving over 80% of proteins to the liquid component.

An In Vitro Pilot Study Comparing the Novel HemoClear Gravity-Driven Microfiltration Cell Salvage System with the Conventional Centrifugal XTRA™ Autotransfusion Device.

BACKGROUND: In 2013, the World Health Organization reported a shortage of 17 million red blood cell units, a number that remains growing. Acts to relieve this shortage have primarily focused on allogeneic blood collection. Nevertheless, autologous transfusion can partially alleviate the current pressure and dependence on blood banking systems. To achieve this, current gold standard autotransfusion devices should be complemented with widely available, cost-efficient, and time-efficient devices. The novel HemoClear cell salvage device (HemoClear BV, Zwolle, Netherlands), a gravity-driven microfilter, potentially is widely employable. We evaluated its performance in the cardiac postoperative setting compared to the centrifugal XTRA™ autotransfusion device. METHODS: In a split-unit study (n = 18), shed blood collected 18 hours after cardiothoracic surgery was divided into two equal volumes. One-half was processed by the XTRA™ device and the other with the HemoClear blood separation system. In this paired set-up, equal washing volumes were used for both methods. Washing effectivity and cellular recovery were determined by measuring of complete blood count, free hemoglobin, complement C3, complement C4, and D-dimer in both concentrate as filtrate. Also, processing times and volumes were evaluated. RESULTS: The HemoClear and XTRA™ devices showed equal effectiveness in concentrating erythrocytes and leucocytes. Both methods reduced complement C3, complement C4, and D-dimer by ≥90%. The centrifugal device reduced solutes more significantly by up to 99%. Free hemoglobin load was reduced to 12.9% and 15.5% by the XTRA™ and HemoClear, respectively. CONCLUSION: The HemoClear device effectively produced washed concentrated red blood cells comparably to the conventional centrifugal XTRA™ autotransfusion device. Although the centrifugal XTRA™ device achieved a significantly higher reduction in contaminants, the HemoClear device achieved acceptable blood quality and seems promising in settings where gold standard cell savers are unaffordable or unpractical.

A novel approach to resolve severe mediastinal and subcutaneous emphysema occurring in Pneumocystis jirovecii pneumonia using vacuum-assisted closure therapy.

A 50-year-old human immunodeficiency virus positive patient who was diagnosed with Pneumocystis jirovecii pneumonia developed severe subcutaneous and mediastinal emphysema, which was progressive despite low pressure mechanical ventilation. Infraclavicular skin incisions and vacuum-assisted closure therapy were used to resolve the emphysema. The subcutaneous emphysema decreased significantly, and after 1 week the vacuum-assisted closure therapy was ended successfully. This technique has previously been described in several case reports, where it is a promising treatment in severe subcutaneous emphysema, but it is not yet widely used. This case report supports the further use of vacuum-assisted closure therapy in subcutaneous emphysema. Successful treatment of severe mediastinal and subcutaneous emphysema in Pneumocystis jirovecii pneumonia can be achieved by vacuum-assisted closure therapy on infraclavicular skin incisions.

Implementation of a specific safety check is associated with lower postoperative mortality in cardiac surgery.

INTRODUCTION: In cardiac surgery, a preincision safety checklist may decrease complications and improve survival. Until now, it has not been demonstrated whether the implementation of such a checklist indeed reduces mortality. OBJECTIVE: Introduction of a preincision safety checklist on mortality was studied in a large adult cardiac surgery population. METHODS: This prospective, multicenter cohort study included 5937 consecutive adult patients, undergoing cardiac surgery, between January 2015 and December 2015, in 7 Dutch non-academic cardiac centers. The Isala Safety Check (ISC) is a short checklist addressing specific cardiac surgery safety items, in combination with a concise postinduction transesophageal echocardiography, which was gradually over time introduced in the 7 hospitals during 2015. We compared 120-day mortality and major complications between patients undergoing surgery with or without the use of the ISC. Propensity matching and Cox regression analyses were performed to adjust for potential confounders. RESULTS: The ISC was applied in 2718 patients (46%). Comorbidity and age were comparable in both groups. In the ISC group, 120-day mortality was significantly lower (1.7% vs 3.0%; P < .01). Both after propensity matching (hazard ratio, 0.44; 95% confidence interval, 0.22-0.87) and Cox regression analysis (hazard ratio, 0.56; 95% confidence interval, 0.35-0.90), the use of the ISC was still associated with reduced 120-day mortality. Deep sternal wound infection, surgical re-exploration, and stroke were not significantly different between both groups. CONCLUSIONS: Application of a short preincision safety checklist in a mixed population of adult cardiac surgery patients is associated with significantly reduced 120-day mortality.

Impact of Modified Transesophageal Echocardiography on Mortality and Stroke after Cardiac Surgery: A Large Cohort Study.

The aim of this study was to investigate the impact of perioperative screening with modified transesophageal echocardiography (A-View method). We compared, in consecutive patients who underwent cardiac surgery between 2006 and 2014, 30-day mortality and in-hospital stroke incidence, operated either with perioperative modified TEE screening (intervention group) or only with conventional TEE screening (control group). Of the 8,605 study patients, modified TEE was applied in 1,391 patients (16.2%). Patients in the intervention group were on average older (71 versus 68 years, p < 0.001) and more often females (31.0% versus 28.0%, p < 0.001) and had a higher predicted mortality (EuroSCORE I: 5.9% versus 4.0%, p < 0.001). The observed 30-day mortality was 2.2% and 2.5% in both groups, respectively, with multivariable and propensity-score adjusted relative risks (RRs) of 0.70 (95% CI: 0.50-1.00, p = 0.05) and 0.67 (95% CI: 0.45-0.98, p = 0.04). In-hospital stroke was 2.9% and 2.1% in both groups, respectively, with adjusted RRs of 1.03 (95% CI: 0.73-1.45) and 1.01 (95% CI: 0.71-1.43). In patients undergoing cardiac surgery, use of perioperative screening for aortic atherosclerosis with modified TEE was associated with lower postoperative mortality, but not stroke, as compared to patients operated on without such screening.

A Protocol for Diagnosis and Management of Aortic Atherosclerosis in Cardiac Surgery Patients.

In patients undergoing cardiac surgery, use of perioperative screening for aortic atherosclerosis with modified TEE (A-View method) was associated with lower postoperative mortality, but not stroke, as compared to patients operated on without such screening. At the time of clinical implementation and validation, we did not yet standardize the indications for modified TEE and the changes in patient management in the presence of aortic atherosclerosis. Therefore, we designed a protocol, which combined the diagnosis of atherosclerosis of thoracic aorta and the subsequent considerations with respect to the intraoperative management and provides a systematic approach to reduce the risk of cerebral complications.

Effect of Fibrinogen Concentrate on Intraoperative Blood Loss Among Patients With Intraoperative Bleeding During High-Risk Cardiac Surgery: A Randomized Clinical Trial.

Importance: Fibrinogen concentrate might partly restore coagulation defects and reduce intraoperative bleeding. Objective: To determine whether fibrinogen concentrate infusion dosed to achieve a plasma fibrinogen level of 2.5 g/L in high-risk cardiac surgery patients with intraoperative bleeding reduces intraoperative blood loss. Design, Setting, and Participants: A randomized, placebo-controlled, double-blind clinical trial conducted in Isala Zwolle, the Netherlands (February 2011-January 2015), involving patients undergoing elective, high-risk cardiac surgery (ie, combined coronary artery bypass graft [CABG] surgery and valve repair or replacement surgery, the replacement of multiple valves, aortic root reconstruction, or reconstruction of the ascending aorta or aortic arch) with intraoperative bleeding (blood volume between 60 and 250 mL suctioned from the thoracic cavity in a period of 5 minutes) were randomized to receive either fibrinogen concentrate or placebo. Interventions: Intravenous, single-dose administration of fibrinogen concentrate (n = 60) or placebo (n = 60), targeted to achieve a postinfusion plasma fibrinogen level of 2.5 g/L. Main Outcomes and Measures: The primary outcome was blood loss in milliliters between intervention (ie, after removal of cardiopulmonary bypass) and closure of chest. Safety variables (within 30 days) included: in-hospital mortality, myocardial infarction, cerebrovascular accident or transient ischemic attack, renal insufficiency or failure, venous thromboembolism, pulmonary embolism, and operative complications. Results: Among 120 patients (mean age; 71 [SD, 10] years, 37 women [31%]) included in the study, combined CABG and valve repair or replacement surgery comprised 72% of procedures and had a mean (SD) cardiopulmonary bypass time of 200 minutes (83) minutes. For the primary outcome, median blood loss in the fibrinogen group was 50 mL (interquartile range [IQR], 29-100 mL) compared with 70 mL (IQR, 33-145 mL) in the control group (P = .19), the absolute difference 20 mL (95% CI, -13 to 35 mL). There were 6 cases of stroke or transient ischemic attack (4 in the fibrinogen group); 4 myocardial infarctions (3 in the fibrinogen group); 2 deaths (both in the fibrinogen group); 5 cases with renal insufficiency or failure (3 in the fibrinogen group); and 9 cases with reoperative thoracotomy (4 in the fibrinogen group). Conclusions and Relevance: Among patients with intraoperative bleeding during high-risk cardiac surgery, administration of fibrinogen concentrate, compared with placebo, resulted in no significant difference in the amount of intraoperative blood loss. Trial Registration: clinicaltrials.gov Identifier: NCT01124981 and EudraCT No: 2009-018086-12.

Trait anxiety mediates the effect of stress exposure on post-traumatic stress disorder and depression risk in cardiac surgery patients.

BACKGROUND: Post-traumatic stress disorder (PTSD) and depression are common after cardiac surgery. Lifetime stress exposure and personality traits may influence the development of these psychiatric conditions. METHODS: Self-reported rates of PTSD and depression and potential determinants (i.e., trait anxiety and stress exposure) were established 1.5 to 4 years after cardiac surgery. Data was available for 1125 out of 1244 (90.4%) participants. Multivariable linear regressions were conducted to investigate mediating and/or moderating effects of trait anxiety on the relationship between stress exposure, and PTSD and depression. Pre-planned subgroup analyses were performed for both sexes. RESULTS: PTSD and depression symptoms were present in 10.2% and 13.1% of the participants, respectively. Trait anxiety was a full mediator of the association between stress exposure and depression in both the total cohort and female and male subgroups. Moreover, trait anxiety partially mediated the relationship between stress exposure and PTSD in the full cohort and the male subgroup, whereas trait anxiety fully mediated this relationship in female patients. Trait anxiety did not play a moderating role in the total patient sample, nor after stratification on gender. LIMITATIONS: The unequal distribution of male (78%) and female patients (22%) might limit the generalizability of our findings. Furthermore, risk factors were investigated retrospectively and with variable follow-up time. CONCLUSIONS: In cardiac surgery patients, trait anxiety was found to be an important mediator of postoperative PTSD and depression. Prospective research is necessary to verify whether these factors are reliable screening measures of individuals' vulnerability for psychopathology development after cardiac surgery.

Modified transesophageal echocardiography of the dissected thoracic aorta; a novel diagnostic approach.

BACKGROUND: Transesophageal echocardiography (TEE) is a key diagnostic modality in patients with acute aortic dissection, yet its sensitivity is limited by a "blind-spot" caused by air in the trachea. After placement of a fluid-filled balloon in the trachea visualization of the thoracic aorta becomes possible. This method, modified TEE, has been shown to be an accurate test for the diagnosis of upper aortic atherosclerosis. In this study we discuss how we use modified TEE for the diagnosis and management of patients with (suspected) acute aortic dissection. NOVEL DIAGNOSTIC APPROACH OF THE DISSECTED AORTA: Modified TEE provides the possibility to obtain a complete echocardiographic overview of the thoracic aorta and its branching vessels with anatomical and functional information. It is a bedside test, and can thus be applied in hemodynamic instable patients who cannot undergo computed tomography. Visualization of the aortic arch allows differentiation between Stanford type A and B dissections and visualization of the proximal cerebral vessels enables a timely identification of impaired cerebral perfusion. During surgery modified TEE can be applied to identify the true lumen for cannulation, and to assure that the true lumen is perfused. Also, the innominate- and carotid arteries can be assessed for structural integrity and adequate perfusion during multiple phases of the surgical repair. CONCLUSIONS: Modified TEE can reveal the "blind-spot" of conventional TEE. In patients with (suspected) aortic dissection it is thus possible to obtain a complete echocardiographic overview of the thoracic aorta and its branches. This is of specific merit in hemodynamically unstable patients who cannot undergo CT. Modified TEE can guide also guide the surgical management and monitor perfusion of the cerebral arteries.

Imaging Techniques for Diagnosis of Thoracic Aortic Atherosclerosis.

The most severe complications after cardiac surgery are neurological complications including stroke which is often caused by emboli merging from atherosclerosis in the ascending aorta to the brain. Information about the thoracic aorta is crucial in reducing the embolization risk for both surgical open and closed chest procedures such as transaortic heart valve implantation. Several techniques are available to screen the ascending aorta, for example, transesophageal echocardiography (TEE), epiaortic ultrasound, TEE A-view method, manual palpation, computed tomography, and magnetic resonance imaging. This paper provides a description of the advantages and disadvantages of these imaging techniques.

Survival and quality of life after surgical aortic valve replacement in octogenarians.

BACKGROUND: In patients with symptomatic severe aortic stenosis, advanced age is often a reason for a transcatheter rather than surgical aortic valve replacement. In this pre-transcatheter cohort we had the unique opportunity to study outcomes after surgical aortic valve replacement for severe aortic stenosis in patients who might currently be triaged to a percutaneous approach. METHODS: In a prospective single-center cohort study we compared the incidence of peri-operative complications, mortality, and health-related quality of life in octogenarians versus patients aged <80 years. The quality of life was measured using the SF-36 questionnaire and expressed as a physical and mental component score (PCS and MCS respectively); a score of 50 equals the average score in the age-matched general population. The association between age and the component scores at one-year follow-up was studied with the use of linear regression, corrected for a set of confounding variables. RESULTS: We included 762 patients, of whom 21.4 % was aged >80 and 49.0 % underwent concomitant revascularization. In octogenarians, the incidence of post-operative delirium was 11.0 %, which was higher than in patients aged below 80 (6.2 %, p = 0.034); the operative mortality (1.9 % vs. 2.9 %; p = 0.59) and long-term survival were not different however (log-rank p = 0.75). In octogenarians, the quality of life was impaired 30-days after surgery (PCS 45.01, p < 0.001; MCS 48.21, p = 0.04), which improved towards or above normal values at one-year follow-up (PCS: 49.92, p = 0.67, MCS: 52.55, p < 0.001). After correction for confounding, age was not significantly associated with the one-year PCS (ß 0.08 per year, p = 0.34) or MCS (ß 0.08 per year, p = 0.32). CONCLUSIONS: This pre-transcatheter study showed that surgical aortic valve replacement in octogenarians could be performed with very low mortality, and with a relevant and significant increase of the quality of life towards normal values. Also, age was not associated with a lower PCS or MCS one-year after surgery.

Accuracy, Precision, and Trending Ability of Uncalibrated Arterial Pressure Waveform Analysis of Cardiac Output in Patients With Impaired Left Ventricular Function: A Prospective, Observational Study.

OBJECTIVES: Uncalibrated arterial waveform analysis provides minimally invasive and continuous measurement of cardiac output (CO). This technique could be of great value in patients with impaired left ventricular function, but the validity in these patients is not well established. The aim of this study was to investigate the accuracy, precision, and trending ability of uncalibrated arterial waveform analysis of cardiac output in patients with impaired left ventricular function. DESIGN: Prospective, observational, method-comparison study. SETTING: Nonuniversity teaching hospital, single center. PARTICIPANTS: The study included 22 patients with a left ventricular ejection fraction of 40% or less undergoing elective coronary artery bypass grafting. INTERVENTIONS: In the period between induction of anesthesia and sternotomy, CO was measured using the FloTrac/Vigileo system (third-generation software) and intermittent pulmonary artery thermodilution before and after volume loading. MEASUREMENTS AND MAIN RESULTS: Accuracy and precision as determined using Bland-Altman analysis revealed a bias of -0.7 L/min, limits of agreement of -2.9 to 1.5 L/min, and a mean error of 55% for pooled data. Proportional bias and spread were present, indicating that bias and limits of agreement were underestimated for high CO values. Trending ability was assessed using 4-quadrant analysis, which revealed a concordance of 86%. Concordance from a clinical perspective was 36%. Polar plot analysis showed an angular bias of 13° degrees, with radial limits of agreement of -55° to 51°. Polar concordance at±30° was 50%. CONCLUSIONS: Arterial waveform analysis of cardiac output and pulmonary artery thermodilution cardiac output were not interchangeable in patients with impaired left ventricular function.

The Effect of Dexamethasone on Symptoms of Posttraumatic Stress Disorder and Depression After Cardiac Surgery and Intensive Care Admission: Longitudinal Follow-Up of a Randomized Controlled Trial.

OBJECTIVE: Cardiac surgery and postoperative admission to the ICU may lead to posttraumatic stress disorder and depression. Perioperatively administered corticosteroids potentially alter the risk of development of these psychiatric conditions, by affecting the hypothalamic-pituitary-adrenal axis. However, findings of previous studies are inconsistent. We aimed to assess the effect of a single dose of dexamethasone compared with placebo on symptoms of posttraumatic stress disorder and depression and health-related quality of life after cardiac surgery and ICU admission. DESIGN: Follow-up study of a randomized clinical trial. SETTING: Five Dutch heart centers. PATIENTS: Cardiac surgery patients (n = 1,244) who participated in the Dexamethasone for Cardiac Surgery trial. INTERVENTIONS: A single intraoperative IV dose of dexamethasone or placebo was administered in a randomized, double-blind way. MEASUREMENTS AND MAIN RESULTS: Symptoms of posttraumatic stress disorder, depression, and health-related quality of life were assessed with validated questionnaires 1.5 years after randomization. Data were available for 1,125 patients (90.4%); of which 561 patients received dexamethasone and 564 patients received placebo. Overall, the prevalence of psychopathology was not influenced by dexamethasone. Posttraumatic stress disorder and depression were present in, respectively, 52 patients (9.3%) and 69 patients (12.3%) who received dexamethasone and in 66 patients (11.7%) and 78 patients (13.8%) who received placebo (posttraumatic stress disorder: odds ratio, 0.82; 95% CI, 0.55-1.20; p = 0.30; depression: odds ratio, 0.92; 95% CI, 0.64-1.31; p = 0.63). Subgroup analysis revealed a lower prevalence of posttraumatic stress disorder (odds ratio, 0.23; 95% CI, 0.07-0.72; p < 0.01) and depression (odds ratio, 0.29; 95% CI, 0.11-0.77; p < 0.01) in female patients after dexamethasone administration. Health-related quality of life did not differ between groups and was not associated with psychopathology. CONCLUSIONS: Overall, our findings suggest that exogenous administration of the glucocorticoid receptor agonist dexamethasone-compared with placebo-during cardiac surgery does not positively or negatively affect the prevalence of posttraumatic stress disorder and depression. However, in female patients, beneficial effects on the occurrence of posttraumatic stress disorder and depression may be present.

Intraoperative High-Dose Dexamethasone in Cardiac Surgery and the Risk of Rethoracotomy.

BACKGROUND: Cardiac surgery with the use of cardiopulmonary bypass is associated with a systemic inflammatory response. Intraoperative corticosteroids are administered to attenuate this inflammatory response. The recent Dexamethasone for Cardiac Surgery (DECS) trial could not demonstrate a beneficial effect of dexamethasone on major adverse events in cardiac surgical patients. Previous studies suggest that corticosteroids may affect postoperative coagulation and blood loss, and therefore could influence the risk of surgical reinterventions. We investigated the effects of prophylactic intraoperative dexamethasone treatment on the rate of rethoracotomy after cardiac surgery. METHODS: We performed a post-hoc additional data collection and analysis in the DECS trial. A total of 4,494 adult patients undergoing cardiac surgery with cardiopulmonary bypass were randomly assigned to intravenous dexamethasone (1.0 mg/kg) or placebo. The primary endpoint for the present study was the incidence of any rethoracotomy within the first 30 postoperative days. Secondary endpoints included the reason for rethoracotomy and the incidence of perioperative transfusion of blood products. RESULTS: In the dexamethasone group, 217 patients (9.7%) underwent a rethoracotomy, and in the placebo group, 165 patients did (7.3%; relative risk 1.32, 95% confidence interval: 1.09 to 1.61, p = 0.005). The most common reason for rethoracotomy was tamponade in both groups: 3.9% versus 2.1%, respectively (relative risk 1.84, 95% confidence interval: 1.30 to 2.61, p < 0.001). CONCLUSIONS: Intraoperative high-dose dexamethasone administration in cardiac surgery was associated with an increased rethoracotomy risk.

Intraoperative High-Dose Dexamethasone and Severe AKI after Cardiac Surgery.

Administration of prophylactic glucocorticoids has been suggested as a strategy to reduce postoperative AKI and other adverse events after cardiac surgery requiring cardiopulmonary bypass. In this post hoc analysis of a large placebo-controlled randomized trial of dexamethasone in 4465 adult patients undergoing cardiac surgery, we examined severe AKI, defined as use of RRT, as a primary outcome. Secondary outcomes were doubling of serum creatinine level or AKI-RRT, as well as AKI-RRT or in-hospital mortality (RRT/death). The primary outcome occurred in ten patients (0.4%) in the dexamethasone group and in 23 patients (1.0%) in the placebo group (relative risk, 0.44; 95% confidence interval, 0.19 to 0.96). In stratified analyses, the strongest signal for potential benefit of dexamethasone was in patients with an eGFR<15 ml/min per 1.73 m(2). In conclusion, compared with placebo, intraoperative dexamethasone appeared to reduce the incidence of severe AKI after cardiac surgery in those with advanced CKD.

Effects of dexamethasone on cognitive decline after cardiac surgery: a randomized clinical trial.

BACKGROUND: Cardiac surgery can be complicated by postoperative cognitive decline (POCD), which is characterized by impaired memory function and intellectual ability. The systemic inflammatory response that is induced by major surgery and cardiopulmonary bypass may play an important role in the etiology of POCD. Prophylactic corticosteroids to attenuate the inflammatory response may therefore reduce the risk of POCD. The authors investigated the effect of intraoperative high-dose dexamethasone on the incidence of POCD at 1 month and 12 months after cardiac surgery. METHODS: This multicenter, randomized, double-blind, placebo-controlled trial is a preplanned substudy of the DExamethasone for Cardiac Surgery trial. A total of 291 adult patients undergoing cardiac surgery with cardiopulmonary bypass were recruited in three hospitals and randomized to receive dexamethasone 1 mg/kg (n = 145) or placebo (n = 146). The main outcome measures were incidence of POCD at 1- and 12-month follow-up, defined as a decline in neuropsychological test performance beyond natural variability, as measured in a control group. RESULTS: At 1-month follow-up, 19 of 140 patients in the dexamethasone group (13.6%) and 10 of 138 patients in the placebo group (7.2%) fulfilled the diagnostic criteria for POCD (relative risk, 1.87; 95% CI, 0.90 to 3.88; P = 0.09). At 12-month follow-up, 8 of 115 patients in the dexamethasone group (7.0%) and 4 of 114 patients (3.5%) in the placebo group had POCD (relative risk, 1.98; 95% CI, 0.61 to 6.40; P = 0.24). CONCLUSION: Intraoperative high-dose dexamethasone did not reduce the risk of POCD after cardiac surgery.

Effectiveness of a cardiac surgery-specific transfusion protocol.

BACKGROUND: Cardiac surgery is often complicated by excessive bleeding that is commonly treated with blood products. In the year 2009 a transfusion protocol was introduced specifically designed for cardiac surgery procedures. This study aims to evaluate the effect of this protocol on transfusion of blood products and the occurrence of clinical events. STUDY DESIGN AND METHODS: This was a nonrandomized intervention study. The index group was transfused according to a tailor-made transfusion protocol (operation in 2009/2010) and the control group was transfused according to the Dutch national transfusion guideline (operation in 2007/2008). The primary outcome was mean number of units transfused and proportion of patients transfused. Secondary outcomes were in-hospital mortality, myocardial infarction, cerebrovascular accident or transient ischemic attack, renal injury or failure, rethoracotomy, and prolonged mechanical ventilation. RESULTS: The control group comprised 2685 patients and the index group 2534 patients. The tailor-made transfusion protocol resulted in a decrease of patients transfused with red blood cells (RBCs) and fresh-frozen plasma (FFP) during surgery with odds ratio of 0.69 (95% confidence interval [CI], 0.55-0.86) and 0.63 (95% CI, 0.46-0.86), respectively. Fewer myocardial infarctions were observed in the index group with OR of 0.67 (95% CI, 0.47-0.96). CONCLUSION: The cardiac surgery-specific transfusion protocol resulted in fewer patients transfused with RBCs and FFP and a lower incidence of myocardial infarction. This tailor-made protocol has led to a more judicious use of blood products and is a basis for further refinement of coagulation management during cardiac surgery procedures.