Incidence and healing times of postoperative sternal wound infections: a retrospective observational single-centre study.

Objectives: Analyses of incidence and time required to heal sternal wound infections after heart surgery performed via a median sternotomy between 2020 and 2022. Results: Superficial wound infections (SWI) were five times more common (2.7%) than mediastinitis (0.5%) among 2693 patients. The median time between the operation and diagnosis of SWI was 26 (interquartile range [IQR] 15-33) days vs. 16 (IQR 9-25) days for mediastinitis (p = .12). Gram-negative bacteria caused 44% of the 85 infections. Sternal wound infection correlated to higher body mass index, female sex, smoking, diabetes mellitus, previous myocardial infarction, coronary artery bypass grafting, use of internal mammary graft, and re-entry for postoperative bleeding. Eight of 59 patients (13.6%) with sternal wound infections had bilateral mammary grafts, compared to 102 of 1191 patients (8.6%) without wound infections (p = .28). Negative pressure wound therapy was always used to treat mediastinitis and applied in 63% of patients with SWI. Two of 13 patients with mediastinitis (15%) and none of 72 patients with SWI died within 90 days after the operation. The median time until the wound healed was 1.9 (IQR 1.3-3.7) months after SWI vs. 1.7 (IQR 1.3-5.3) months after mediastinitis (p = .63). Six patients (7%) required longer than one year to treat the infection. Conclusions: Postoperative sternal wound infections usually appeared several weeks after surgery and were associated with factors as high body mass index, diabetes mellitus and coronary artery bypass. SWI were more common than mediastinitis and often required negative pressure wound therapy and similar treatment time as mediastinitis.

Troponin T and N-Terminal Pro-Brain Natriuretic Peptide Are Associated with Long-Term All-Cause Mortality in Patients with Post-Sternotomy Mediastinitis following Coronary Artery Bypass Grafting: A 15-Year Follow-Up Study.

BACKGROUND: Deep sternal wound/mediastinitis is a rare but feared complication in coronary artery bypass grafting (CABG) patients and seems to increase the risk of cardiac death, and is also associated with the risk of early internal mammary artery (IMA) graft obstruction. The pathological mechanism explaining the link between mediastinitis and IMA graft obstruction and the impact on mortality is complex, multifactorial, and not fully investigated. OBJECTIVES: Mediastinitis has been associated with increased concentrations of N-terminal pro-brain natriuretic peptide (NT-proBNP) and troponin T (TnT) at mid-term follow-up, representing persistent low-grade myocardial injury and impaired cardiac function. However, whether mediastinitis is associated with all-cause mortality, or whether the association is driven by these cardiac-specific biomarkers (NT-proBNP and TnT), is not investigated. METHODS: The present study provides the longest and most complete follow-up data in 82 patients undergoing CABG, including 41 with post-sternotomy mediastinitis. RESULTS: The annualized incidence rate of mediastinitis was 0.14%/year and remained stable at 0.14% throughout the study period. During a mean follow-up of 12.7 ± 3.5 years, a total of 42 deaths occurred (27 [65.9%] in mediastinitis and 15 [36.6%] in non-mediastinitis group, p = 0.008). No association was found between IMA or saphenous vein graft obstruction with all-cause mortality. Mediastinitis was associated with a 1.9-fold increased risk of all-cause mortality. However, in the multivariable-adjusted models, age and higher TnT and NT-proBNP levels, but not mediastinitis per se were associated with all-cause mortality. CONCLUSIONS: Mediastinitis after CABG surgery was associated with a poor prognosis during a 15-year follow-up, showing a nearly two-fold higher frequency of all-cause mortality compared with non-mediastinitis group, with the differences in mortality rate occurring primarily after 10 years. The association between mediastinitis and all-cause mortality was modulated by subclinical myocardial damage and stretch, reflected by elevated TnT and NT-proBNP, measured at 2.7-year follow-up, underscoring that these could represent prognostic markers in CABG patients.

Post-cardiac surgery fungal mediastinitis: clinical features, pathogens and outcome.

OBJECTIVES: The occurrence of mediastinitis after cardiac surgery remains a rare and severe complication associated with poor outcomes. Whereas bacterial mediastinitis have been largely described, little is known about their fungal etiologies. We report incidence, characteristics and outcome of post-cardiac surgery fungal mediastinitis. METHODS: Multicenter retrospective study among 10 intensive care units (ICU) in France and Belgium of proven cases of fungal mediastinitis after cardiac surgery (2009-2019). RESULTS: Among 73,688 cardiac surgery procedures, 40 patients developed fungal mediastinitis. Five were supported with left ventricular assist device and five with veno-arterial extracorporeal membrane oxygenation before initial surgery. Twelve patients received prior heart transplantation. Interval between initial surgery and mediastinitis was 38 [17-61] days. Only half of the patients showed local signs of infection. Septic shock was uncommon at diagnosis (12.5%). Forty-three fungal strains were identified: Candida spp. (34 patients), Trichosporon spp. (5 patients) and Aspergillus spp. (4 patients). Hospital mortality was 58%. Survivors were younger (59 [43-65] vs. 65 [61-73] yo; p = 0.013), had lower body mass index (24 [20-26] vs. 30 [24-32] kg/m2; p = 0.028) and lower Simplified Acute Physiology Score II score at ICU admission (37 [28-40] vs. 54 [34-61]; p = 0.012). CONCLUSION: Fungal mediastinitis is a very rare complication after cardiac surgery, associated with a high mortality rate. This entity should be suspected in patients with a smoldering infectious postoperative course, especially those supported with short- or long-term invasive cardiac support devices, or following heart transplantation.

Impact of a Surgical Wound Infection Prevention Bundle in Pediatric Cardiothoracic Surgery.

BACKGROUND: The aim of this project was to decrease the incidence of surgical wound infection (SWI) to <1.5% in our pediatric cardiothoracic surgery patients using a prevention bundle and quality improvement process. METHODS: An SWI prevention bundle addressing preoperative, intraoperative, and postoperative risks was implemented. The primary outcome was SWI based on Society of Thoracic Surgeons criteria (superficial, deep, or mediastinitis). Novel aspects of the bundle included standardization of surgical closure and wound coverage for 14 days with a negative pressure dressing or a silicone dressing. Data were collected from January 2017 to November 2021; bundle intervention began in December 2019. SWIs were tracked using a g-chart. Preintervention and postintervention cohorts were compared by standard descriptive statistics. There were no changes in SWI tracking methods during the study. RESULTS: During the study, 1159 individuals underwent 1768 surgical interventions. Preintervention (n = 931) and postintervention (n = 837) groups were clinically similar, with fewer neonatal surgeries in the postintervention group. SWI decreased in all patients (preintervention period: 1 SWI per 22 surgeries; postintervention period: 1 SWI per 62.6 surgeries) and in neonates (preintervention period: 1 SWI per 12 surgeries; postintervention period: 1 SWI per 26.7 surgeries). Special cause variation was achieved in the entire cohort by March 2021 and in neonates by April 2021. Decreases in SWI occurred in superficial and deep wounds but not in mediastinitis. Annual rate of total SWIs decreased from 2.83% in 2019 to 1.15% in 2021. Intensive care unit and hospital length of stay did not change. CONCLUSIONS: We demonstrated a reduction in SWI rates after implementing an SWI prevention bundle including standardized surgical closure and prolonged wound protection.

Non-infectious sternal dehiscence after coronary artery bypass surgery.

INTRODUCTION: Non-infectious sternal dehiscence (NISD) is a known complication following coronary artery bypass grafting (CABG), with previous studies estimating an incidence of 0.4-1% of surgeries. We aimed to study the incidence of NISD together with short- and long-term outcomes in a whole-nation cohort of patients. MATERIALS AND METHODS: A retrospective study on consecutive CABG patients diagnosed with NISD at Landspitali from 2001 to 2020. Patients diagnosed with infectious mediastinitis (n = 20) were excluded. NISD patients were compared to patients with an intact sternum regarding patient demographics, cardiovascular risk factors, intra- and postoperative data, and estimated overall survival. The median follow-up was 9.5 years. RESULTS: Twenty out of 2280 eligible patients (0.88%) developed NISD, and the incidence did not change over the study period (p = 0.98). The median time of diagnosis was 12 days postoperatively (range, 4-240). All patients were re-operated using a Robicsek-rewiring technique, with two cases requiring a titanium plate for fixation. Patients with NISD were older, had a higher BMI and EuroSCORE II, lower LVEF, and more often had a history of COPD, MI, and diabetes compared to those without NISD. Length of stay was extended by 15 days for NISD patients, but short and long-term survival was not statistically different between the groups. CONCLUSIONS: The incidence of NISD was low and in line with previous studies. Although the length of hospital stay was extended, both short- and long-term survival of NISD patients was not significantly different from patients with an intact sternum.

Evaluation of post-operative development of mediastinitis in patients undergoing isolated coronary artery bypass grafting surgery: A single-center experience.

BACKGROUND: In this study, we aimed to evaluate mediastinitis cases developed after isolated coronary artery bypass graft surgery performed by median sternotomy to determine the causative microorganisms, risk factors, and clinical features. METHODS: Between March 2009 and December 2018, a total of 44 patients (32 males and 12 females; mean age 62.84±6.951 years; range, 46-78 years) who underwent isolated coronary artery bypass grafting surgery with median sternotomy and developed mediastinitis postoperatively were included in the studying our cardiovascular surgery (CVS) department. Patients demographic information, comorbidities, habits, pre-operative hospital stay, elective or emergency surgery, perioperative internal mammary artery use, perioperative blood or blood product, operation and cardiopulmonary bypass times, suitability of antibiotic prophylaxis, medical and surgical treatment, clinical data, and laboratory results were retrospectively analyzed. Purulent discharge cultures obtained directly from the mediastinal space and microbiological examination notes made from the material obtained from the surgical site or surgical repair were recorded. RESULTS: In isolated coronary artery bypass grafting surgery performed over a period of approximately 10 years, the rate of mediastinitis was 1%. There was no statistically significant difference between patients with and without mediastinitis in terms of age, sex, smoking habits, duration of operation and cardiopulmonary bypass, and intraoperative blood transfusion. The presence of diabetes mellitus and high mean body mass index was significantly higher in patients with mediastinitis compared to those without. Mediastinitis was diagnosed in 38 (86.3%) patients in the 1st month, 5 (11.3%) in the first 3 months, and 1 (2.2%) in the 1st year. Twenty-five (56.9%) Gram-positive bacteria, 13 (29.6%) Gram-negative bacteria, and 1 (2.3%) fungi were the microorganisms grown in purulent discharge cultures. Pathogen microorganisms could not be produced in 5 (11.4%) cases. The three most commonly isolated agents were methicillin-resistant coagulase-negative staphylococci (MRCNS) (50%), Escherichia coli (9.1%), and Klebsiella pneumoniae (6.8%). CONCLUSION: Attention should be paid to surgical site infection in patients undergoing CVS. Following discharge, follow-up is important and empirical treatment should be determined by considering the presence of MRCNS as the leading infectious agent in our hospital when infection occurs.

Characteristics and outcomes of patients with postoperative Candida versus bacterial mediastinitis: a case-matched comparative study.

OBJECTIVES: Postoperative mediastinitis, a feared complication after cardiac surgery, is associated with high mortality, especially of critically ill patients. Candida species infections are rare and severe, with poorly known outcomes. We conducted a case-control study to describe the characteristics, management and outcomes of patients with postoperative Candida mediastinitis. METHODS: This French, monocentre, retrospective study included all patients with postoperative Candida mediastinitis (January 2003-February 2020) requiring intensive care unit admission. Candida mediastinitis patients (henceforth cases) were matched 1:1 with postoperative bacterial mediastinitis (henceforth control), based on 3 factors during mediastinitis management: age >40 years, cardiac transplantation and invasive circulatory device used. The primary end point was the probability of survival within 1 year after intensive care unit (ICU) admission. RESULTS: Forty cases were matched to 40 controls. The global male/female ratio was 2.1, with mean age at admission 47.9 ± 13.8 years. Candida species were: 67.5% albicans, 17.5% glabrata, 15% parapsilosis, 5.0% tropicalis, 2.5% krusei and 2.5% lusitaniae. The median duration of mechanical ventilation was 23, 68.8% of patients received renal replacement therapy and 62.5% extracorporeal membrane oxygenation support. The probability of survival within the first year after ICU admission was 40 ± 5.5% and was significantly lower for cases than for controls (43 ± 8% vs 80 ± 6.3%, respectively; Log-rank test: P < 0.0001). The multivariable Cox proportional hazards model retained only renal replacement therapy [hazard ratio (HR) 3.7, 95% confidence interval (CI) 1.1-13.1; P = 0.04] and Candida mediastinitis (HR 2.4, 95% CI 1.1-5.6; P = 0.04) as independently associated with 1-year mortality. CONCLUSIONS: Candida mediastinitis is a serious event after cardiac surgery and independently associated with 1-year mortality. Further studies are needed to determine whether deaths are directly attributable to Candida mediastinitis.

Mediastinitis of odontogenic origin. A serious complication with 80 years of history.

We performed a systematic review of the literature about descending necrotising mediastinitis (DNM) of odontogenic origin. In parallel, a retrospective review of this pathology was carried out in an Oral and Maxillofacial Surgery Service of a reference hospital for a population of 1,100,000 inhabitants. The main objectives were to determine changes in mortality and prevalence of this serious complication. The systematic review included 51 articles with 89 patients and our study comprised seven patients. The period of time with the highest number of cases was between 2000-2009 (38 patients). The percentage of mortality observed was 20.2% in diffuse DNM and 4.9% in localised DNM. Thirty-one patients with DNM in our review were admitted for more than 41 days. Despite evidence of a decrease in DNM cases, publications have increased over the years, but it does not appear to be due to an increase in those of odontogenic origin. The survival of DNM has improved since 1998 and remained stable since then. Despite the low prevalence of this disease, multicentre control studies are needed to achieve better evidence about this entity.

Tonsillitis, tonsillectomy, and deep neck space infections in England: the case for a new guideline for surgical and non-surgical management.

INTRODUCTION: Tonsillectomy is a common surgical procedure performed chiefly for recurrent tonsillitis. The Scottish Intercollegiate Guidance Network (SIGN) introduced guidelines in 1998 to improve patient selection for tonsillectomy and reduce the potential harm to patients from surgical complications such as haemorrhage. Since the introduction of the guidance, the number of admissions for tonsillitis and its complications has increased. National Hospital Episode Statistics over a 20-year period were analysed to assess the trends in tonsillectomy, post-tonsillectomy haemorrhage, tonsillitis and its complications with reference to the guidance, procedures of limited clinical value and the associated costs and benefits. MATERIALS AND METHODS: A literature search was conducted via PubMed and the Cochrane Library to identify relevant research. Hospital Episode Statistics data were interrogated and relevant data compared over time to assess trends related to the implementation of national guidance. RESULTS: Over the period analysed, the incidence of deep neck space infections has increased almost five-fold, mediastinitis ten-fold and peritonsillar abscess by 1.7-fold compared with prior to SIGN guidance. Following procedures of limited clinical value implementation, the incidence of deep neck space infections has increased 2.4-fold, mediastinitis 4.1-fold and peritonsillar abscess 1.4-fold compared with immediately prior to clinical commissioning group rationing. The rate of tonsillectomy and associated haemorrhage (1-2%) has remained relatively constant at 46,299 (1999) compared with 49,447 (2009) and 49,141 (2016), despite an increase in the population of England by seven million over the 20-year period. DISCUSSION: The rise in admissions for tonsillitis and its complications appears to correspond closely to the date of SIGN guidance and clinical commissioning group rationing of tonsillectomy and is on the background of a rise in the population of the UK. The move towards daycase tonsillectomy has reduced bed occupancy after surgery but this has been counteracted by an increase in admissions for tonsillitis and deep neck space infections, sometimes requiring lengthy intensive care stays and a protracted course of rehabilitation. The total cost of treating the complications of tonsillitis in England in 2017 is estimated to be around £73 million. The cost of tonsillectomy and treating post-tonsillectomy haemorrhage is £56 million by comparison. The total cost per annum for tonsillectomy prior to the introduction of SIGN guidance was estimated at £71 million with tonsillitis and its complications accounting for a further £8 million.

Emerging trends in mediastinitis: National Veterans Health Administration experience with methicillin-resistant Staphylococcus aureus prevention.

OBJECTIVES: Perioperative bacterial decolonization and prophylactic antibiotic therapy at the Veterans Affairs Health Care System have changed over the past decade. Our objectives were to identify associated changes in the microbiology of mediastinitis and to perform a contemporary survival analysis in patients with mediastinitis after isolated coronary artery bypass grafting procedure. METHODS: From January 2006 to December 2015, 45,323 consecutive patients underwent coronary artery bypass grafting at 83 medical centers. The Veterans Affairs Health Care System nationwide administrative database was queried to identify patients with postoperative mediastinitis and obtain patient-level data. Simple descriptive statistics and multivariable logistic regression were used to analyze microbiologic data and identify risk factors for infection. Poisson regression was used to determine yearly incidence estimates. Cox proportional hazard model identified predictors of long-term survival from date of operation. RESULTS: During the study period, 348 patients (0.78%) developed postoperative mediastinitis-with a stable rate of incidence (Cochrane-Armitage test, P = .69). Of patients with microbiologic data, 75.5% of infections (n = 188) were caused by gram-positive and 24.5% (n = 61) gram-negative organisms. The incidence of methicillin-resistant Staphylococcus aureus mediastinitis decreased during the study period (Cochrane-Armitage test, P = .013). Gram-negative mediastinitis occurred earlier than gram-positive mediastinitis (median, 15.0 vs 25.0 days; P < .0001). Patients with mediastinitis did not have increased 30-day mortality (2.0% vs 1.9%; P = .9), but had worse long-term survival compared with uninfected patients (P < .0001). CONCLUSIONS: The incidence of methicillin-resistant S aureus mediastinitis has decreased over the past decade. Gram-negative bacteria are responsible for 1 in 4 cases of mediastinitis and infection is diagnosed earlier in the postoperative period than gram-positive mediastinitis. These findings highlight the need for efforts to prevent gram-negative and methicillin-susceptible S aureus mediastinitis.

The Characteristics of Postoperative Mediastinitis During the Changing Phases of Cardiac Surgery.

BACKGROUND: Mediastinitis is a serious complication of open heart surgery associated with high mortality, considerable health care costs, and prolonged hospital stay. We examined characteristics and incidence of mediastinitis during 29 years when indications and patient material have been in a process of change. METHODS: This was a retrospective population-based study comprising all mediastinitis patients more than 16 years of age after open heart surgery between 1990 and 2018 from a population of 1.7 million. Patient records of 50 mediastinitis patients from 2004 to 2014 were reviewed and compared with 120 patients from 1990 to 1999. RESULTS: Annual mediastinitis rate varied 0% to 1.5% with a decreasing trend-from a level exceeding 1.2% to approximately 0.3%-over the study period. In 2004 to 2014 patients with mediastinitis were older, more often smokers, and more often had diabetes mellitus and renal insufficiency than in 1990 to 1999. No difference in length of hospital treatment, antibiotic prophylaxis or treatment, intensive care unit treatment, or mortality was observed between 1990 to 1999 and 2004 to 2014. Coronary artery bypass graft surgery became less common and valve replacement and hybrid operations more common among operations leading to mediastinitis. Staphylococcus aureus increased (from 25% to 56%, p = .005) whereas coagulase-negative staphylococci (46% to 23%, P < .001) and gram-negative bacteria (18% to 12%, P = .033) decreased as causative agents. Surgery for mediastinitis remained similar except introduction of vacuum-assisted closure treatment. CONCLUSIONS: The rate of mediastinitis decreased during these 29 years. No difference in 30-day mortality in mediastinitis was seen: 0.9% in 1990 to 1999 and 2% in 2004 to 2014.

National Database Outcomes of Esophageal Dilations.

OBJECTIVES/HYPOTHESIS: To better assess rates of postoperative complications and mortality following esophageal dilation, and to identify factors associated with adverse outcomes. STUDY DESIGN: Observational, retrospective cohort study. METHODS: We queried a national database of insurance claims for Current Procedural Terminology (CPT) codes representing esophageal dilation performed between 2011 and 2017. Patients aged 18 to 100 who were continuously enrolled with their insurance provider were included. Demographic information, additional CPT codes, concomitant diagnoses, and anticoagulant medication data were collected for all patients included. Postoperative mortality was assessed and International Classification of Diseases (ICD)9/10 codes for complications, including esophageal perforation, hemorrhage, mediastinitis, and sepsis were flagged. RESULTS: We identified 202,965 encounters for esophageal dilation. Of these procedures, 193 were performed on a patient who underwent percutaneous endoscopic gastrostomy (PEG) during the study period and was analyzed separately. Another 244 dilations were excluded due to repeat entries. Of the remaining 202,528 procedures remaining, 42,310 were repeat dilations in the same patient. Data analysis was confined to each patient's initial dilation. 160,218 initial dilations remained. Of these, 62,107 were performed on male patients and 98,111 were performed on female patients. The average age was 57.7 years. There were 12 mortalities within 30 days postoperatively, representing 0.0075% of all dilations. Esophageal perforation and esophageal hemorrhage were the most common reported complications, with 139 and 110 occurrences, respectively. The overall per-dilation complication rate was 0.215%. CONCLUSIONS: Evidence from a national insurance claim database suggests that esophageal dilation is a safe procedure with a low rate of serious complications and a 30-day all-cause mortality rate of less than 1 per 10,000 dilations. LEVEL OF EVIDENCE: 4 Laryngoscope, 131:2436-2440, 2021.

Predictors and In-Hospital Outcomes Among Patients Using a Single Versus Bilateral Mammary Arteries in Coronary Artery Bypass Grafting.

The benefit of bilateral mammary artery (BIMA) use during coronary artery bypass grafting (CABG) continues to be debated. This study examined nationwide trends in BIMA use and factors influencing its utilization. Using the National Inpatient Sample, adults undergoing isolated multivessel CABG between 2005 and 2015 were identified and stratified based on the use of a single mammary artery or BIMA. Regression models were fit to identify patient and hospital level predictors of BIMA use and characterize the association of BIMA on outcomes including sternal infection, mortality, and resource utilization. An estimated 4.5% (n = 60,698) of patients underwent CABG with BIMA, with a steady increase from 3.8% to 5.0% over time (p<0.001). Younger age, male gender, and elective admission, were significant predictors of BIMA use. Moreover, private insurance was associated with higher odds of BIMA use (adjusted odds ratio 1.24) compared with Medicare. BIMA use was not a predictor of postoperative sternal infection, in-hospital mortality, or hospitalization costs. Overall, BIMA use remains uncommon in the United States despite no significant differences in acute postoperative outcomes. Several patient, hospital, and socioeconomic factors appear to be associated with BIMA utilization.

Fatores de riscos para mediastinite no pós-operatório de cirurgia cardíaca / Risk factors for mediastinitis in the post-operative period of heart surgery / Factores de riesgo para mediastinitis en el período postoperatorio de cirugía cardíaca

Objetivos: Identificar os fatores de risco pré e pós-operatórios relacionados ao desenvolvimento de mediastinite entre pacientes submetidos à cirurgia cardíaca em um hospital da cidade do Rio de Janeiro, caracterizar a população estudada e analisar a relação entre os fatores de risco e a incidência de mediastinite nos pacientes submetidos à cirurgia cardíaca. Método: Estudo descritivo, abordagem quantitativa, em que foram identificados os fatores de risco para mediastinite em pacientes que realizaram cirurgia cardíaca em um hospital do Rio de Janeiro. Resultados: Obteve-se um n de 192 pacientes, de maioria homens, na faixa etária de 50 a 69 anos e em sobrepeso. Diabetes mellitus e tabagismo foram as comorbidades mais frequentes, e CRVMC a cirurgia mais realizada, 4 pacientes apresentaram mediastinite. Conclusão: A identificação destes fatores contribui para elaboração de estratégias de prevenção para mediastinite, e na implementação de cuidados de enfermagem no pré e pós-operatório de cirurgias cardíacas

Objectives: To identify pre and postoperative risk factors related to the development of mediastinitis among patients submitted to cardiac surgery at a hospital in the city of Rio de Janeiro, to characterize the study population and to analyze the relationship between risk factors and the incidence of mediastinitis in patients undergoing cardiac surgery. Method: descriptive study, quantitative approach, in which the risk factors for mediastinitis were identified in patients who underwent cardiac surgery in a hospital in Rio de Janeiro. Results: a n of 192 patients, mostly males, aged 50 to 69 years and overweight were obtained. Diabetes mellitus and smoking were the most frequent comorbidities, and CRVMC the most performed surgery, 4 patients had mediastinitis. Conclusion: the identification of these factors contributes to the elaboration of prevention strategies for mediastinitis, and the implementation of nursing care in the pre and postoperative period of cardiac surgeries

Objetivos: Identificar los factores de riesgo pre y postoperatorios relacionados al desarrollo de mediastinitis entre pacientes sometidos a la cirugía cardiaca en un hospital de la ciudad de Río de Janeiro, caracterizar a la población estudiada y analizar la relación entre los factores de riesgo y la incidencia de mediastinitis en los pacientes sometidos a la cirugía cardiaca. Método: Estudio descriptivo, abordaje cuantitativo, en que se identificaron los factores de riesgo para la mediastinitis en pacientes que realizaron una intervención cardiaca en un hospital de Río de Janeiro. Resultados: Se obtuvo un n de 192 pacientes, de mayoría hombres, en el grupo de edad de 50 a 69 años y en sobrepeso. La diabetes mellitus y el tabaquismo fueron las comorbilidades más frecuentes, y CRVMC la cirugía más realizada, 4 pacientes presentaron mediastinitis. Conclusión: La identificación de estos factores contribuye a la elaboración de estrategias de prevención para la mediastinitis, y en la implementación de cuidados de enfermería en el pre y postoperatorio de cirugías cardíacas

Investigation of the Postoperative Complications Rate and Predictors in Patients Undergoing Surgery due to Associated Carotid and Coronary Occlusive Disease.

BACKGROUND: The aim of this study was to evaluate the frequency of postoperative complications in patients who underwent coronary artery bypass grafting (CABG) and simultaneous carotid endarterectomy (CEA) and find predictors of postoperative complications. METHODS: We retrospectively evaluated 86 patients after simultaneous CABG and CEA. Inclusion criteria were: patients with asymptomatic carotid stenosis with a reduction of the carotid lumen diameter of more than 70% detected with Doppler ultrasound and diagnosed with one, two, or three vessel coronary artery disease with coronary stenosis more than 75% and hemodynamic significant stenosis of the left main artery. Exclusion criteria were patients with urgent and previous cardiac surgery and patients with myocardial infarction and stroke in the past one month. We monitored preoperative (ejection fraction, coronarography status), operative (number of grafts, on-pump or off-pump technique) and postoperative (extubation, unit care and hospital stay, bleeding and reoperation) details and complications (myocardial infarction, neurological events, inotropic agents and transfusion requiry, infection, arrhythmic complication, renal failure, mortality). RESULTS: Postoperative complications were observed in 18 (29.9%) patients. Two patients (2.3%) had postoperative stroke and one patient (1.2%) had transient ischemic attack (TIA). Previous stroke was a predictor for increased postoperative neurological events (P < .05). Intrahospital mortality was 8.1%. CONCLUSION: Simultaneous CEA and CABG were performed with low rates of stroke and TIA. Previous stroke was identified as a predictor for increased postoperative neurological complications.

Mediastinitis in open heart surgery: a systematic review and meta-analysis of risk factors.

Objective. We aimed to summarize the evidence from observational studies examining the risk factors of the incidence of mediastinitis in open heart surgery. Design. The study was a systematic review and meta-analysis of cohorts and case-control studies. Material and methods. We searched the literature and 74 studies with at least one risk factor were identified. Both fixed and random effects models were used. Heterogeneity between studies was examined by subgroup and meta-regression analysis. Publication bias or small study effects were evaluated and corrected by limit meta-analysis. Results. When correcting for small study effect, presence of obesity as estimated from 43 studies had Odds Ratio OR = 2.26. (95% CI: 2.17-2.36). This risk was increasing with decreasing latitude of study place. Presence of diabetes mellitus from 63 studies carried an OR = 1.90 (95% CI: 1.59-2.27). Presence of Chronic Obstructive Pulmonary Disease (COPD) from 30 studies had an OR = 2.59 (95% CI: 2.22-2.85). Presence of bilateral intramammary graft (BIMA) from 23 studies carried an OR = 2.54 (95% CI: 2.07-3.13). This risk was increasing with increasing frequency of female patients in the study population. Conclusion. Evidence from this study showed the robustness of the risk factors in the pathogenesis of mediastinitis. Preventive measures can be implemented for reducing obesity, especially in lower latitude countries. Furthermore, it is mandatory to monitor perioperative hyperglycemias with continuous insulin infusion. Use of skeletonized BIMA carries higher risk of mediastinitis especially in female patients without evidence of beneficial effect on survival for the time being.

Management of Less-Than-Severe Aortic Stenosis During Coronary Bypass: A Systematic Review and Meta-Analysis.

OBJECTIVE: The management of concomitant mild-to-moderate aortic stenosis (AS) at the time of coronary artery bypass graft (CABG) is controversial. Here we perform a systematic review and meta-analysis of CABG and aortic valve replacement (AVR) versus CABG alone in patients with mild-moderate AS. METHODS: We searched MEDLINE and EMBASE databases until July 2018 for studies comparing CABG & AVR versus CABG in patients with mild-moderate AS undergoing coronary bypass. Data were extracted by 2 independent investigators. The main outcomes were operative mortality, long-term survival, and reintervention for AS. RESULTS: There were 6 unmatched retrospective observational studies with 1,172 patients (median follow-up 4.7 [interquartile range: 4.3 to 5.3] years). Patients undergoing CABG & AVR had less severe coronary artery disease. There were no differences in operative mortality (relative risk [RR]: 1.07; 95% CI, 0.59 to 1.94; P = 0.8). CABG & AVR was associated with greater incidence of stroke, bleeding, renal failure, and mediastinitis. At median follow-up of 5 years, there was no difference in long-term mortality (incidence rate ratio [IRR]:1.44; 95% CI, 0.83 to 2.51; P = 0.19), but CABG & AVR was associated with 73% lower risk of reoperation for AS (n = 13/485 versus n = 71/702; IRR: 0.27; 95% CI, 0.14 to 0.51; P < 0.001). CONCLUSIONS: In patients undergoing CABG with mild-moderate AS, combining AVR with CABG was associated with no difference in operative mortality but with increased risk of stroke, bleeding, renal failure, and mediastinitis. Long-term mortality was not different, but a risk of reoperation for AS at 5 years was 73% lower. Given the increasingly wide availability and safety of transcatheter aortic valve replacement (TAVR), one may consider a conservative approach toward concomitant mild-moderate AS.

Ambulatory setting of patients with surgical site infections after a cardiac intervention. / Cenário ambulatorial de pacientes com sítio cirúrgico infectado após intervenção cardíaca.

OBJECTIVE: Verifying the clinical-surgical profile and the results of patients monitored in an surgical wound ambulatory after a cardiac surgeries. METHODS: This is a historical cohort research with patients submitted to cardiac surgery and monitored for a year in an outpatient surgical wound clinic from a hospital specialized in cardiology. The study analyzed the prevalent microorganisms in infections, the products used in the dressings, the time of follow-up, and the type of therapy established in the dressings. RESULTS: Among the 150 patients, most were sexagenarians (61.7 ± 11.4 years), hypertensive patients (75%), and diabetic (44.7%). There were 12 patients with mediastinitis (8%) and 44 with surgical site infection (29.3%). Fatty acids (80%) and calcium alginate (19%) were used for wound healing. The mean follow-up time was 35 ± 71 days. CONCLUSION: Sexagenary, hypertensive, diabetic and revascularized patients constituted the population monitored in the wounds outpatient clinic. The SSI and mediastinitis rates found were acceptable and similar to those in literature.

Clinical-care protocol for preventing mediastinitis after coronary artery bypass graft surgery: A quality improvement initiative from a private hospital.

BACKGROUND: Surgical site infections after cardiac surgery are associated with severe outcomes, including reoperation and death. We aimed to describe the effect of a standardized clinical-care protocol for preventing mediastinitis in patients who underwent coronary artery bypass graft surgery (CABG). METHODS: In a hospital certified by Joint Commission International, all patients who underwent CABG from January 2011 to December 2016 were compared in two periods according to the moment of implementation of a standardized clinical-care protocol for prevention of mediastinitis (CCPPM): pre-protocol (January 2011-December 2012) and post-protocol (January 2013-December 2016). The CCPPM consisted of the patient using a kit containing chlorhexidine 2% for bathing, mupirocin 20 mg/g for nasal topical use and chlorhexidine 0.12% for oral hygiene for 5 days before surgery, in addition to prophylaxis with a glycopeptide antimicrobial and strict glucose control (110-140 mg/dL) during surgery and immediate postoperative. RESULTS: We evaluated 1760 patients who underwent CABG in both periods. The occurrence of mediastinitis before protocol implementation was 1.44% (10 of 692 CABG). After the implementation of the protocol, there was an important reduction in the incidence of mediastinitis to 0.09% (1 of 1068 CABG) (P = 0.002). Although we did not observe a significant difference in mortality between the groups (2.3% vs 1%, P = 0.77), there was fewer in-hospital mortality due to mediastinitis after the CCPPM (0.2% vs 0%, P < 0.001). CONCLUSION: Implementation of a standardized CCPPM was associated with a significant reduction in the incidence of mediastinitis after CABG and reduction of mortality in the group of patients with mediastinitis.

Cellulose-Derived Absorbable Hemostatic Product as a Risk Factor for Mediastinitis after Cardiac Surgery.

Background: We describe the management and control of an outbreak of mediastinitis in a cardiac surgery department. Method: We performed a retrospective cohort study of 87 patients who underwent coronary artery bypass grafting (CABG), valve replacement, or both during a five-month period with a higher than normal number of cases of post-operative mediastinitis. In addition to medical records review, a survey was conducted among surgeons to estimate the frequency of cellulose-derived absorbable hemostatic (CDAH) use. Results: Eleven patients (12.5%) developed mediastinitis during the period. None of them died, and the course of the infections was benign. No differences were found between the infected and non-infected patients regarding clinical or demographic characteristics. The rate of infection by surgeon ranged from 0 to 21.4%. (p = 0.38). We found a significant linear relation between the frequency of CDAH use and the risk of infection, from 3.3% to 22.6% (p = 0.024). Cultures of unused CDAHs were negative. Cessation of product use led to no new cases for the following year and to a mediastinitis rate <1% for the following 24 months. Conclusion: We identified a cluster of undesired clinical outcomes compatible with mediastinitis that added morbidity and associated cost, but not deaths, related to the use of CDAH as a hemostatic. These data suggest keeping the use of CDAH in cardiothoracic surgery to a minimum.