Increase in the Rate of Sternal Surgical Site Infection After Coronary Artery Bypass Graft: A Marker of Higher Severity of Illness • (original) (raw)
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Journal of Hospital Infection, 2005
Florence Nightingale Hospital is a 300-bed, university-affiliated, private medical centre with a large open heart surgery programme in Istanbul, Turkey. In this study, the mortality rates, lengths of stay (LOS) and extra costs of patients with deep sternal surgical site infections (DSSSIs) and superficial sternal surgical site infections (SSSSIs) following coronary artery bypass grafting (CABG) were determined from January 1999 to December 2002. Group I included 52 patients with DSSSIs, Group II included 36 patients with SSSSIs and Group III included 88 controls. The controls were selected at random from patients operated within the same year, with the same sex and age within five years, but who had not developed infection. Mortality rates in Groups I, II and III were 19.2%, 0% and 4.5%, respectively; the mortality rate in Group I was significantly different from that in Groups II and III (P!0.005). LOS was 47, 33 and 12 days for Groups I, II and III, respectively, and LOS was statistically different for each group (P!0.005). The costs of extra LOS, antibiotics, and radiological, microbiologial and other laboratory examinations for Groups I and II were US$6850.93 and US$3740.58, respectively. Both DSSSI and SSSSI following CABG extended the LOS and increased the cost, and DSSSI was significantly associated with a high mortality rate. These results suggest the need for improved infection control measures to reduce
2008
Objective: To investigate factors that predict sternal wound complications in patients after coronary artery bypass grafting (CABG) because prediction of deep sternal wound infection after surgery, might help us to do some interventions and reduce its consequences. Methodology: The record of all these patients was reviewed retrospectively. DSWI was defined according to the guidelines of the Centers for Disease Control and Prevention. From Sep 2003 to Sep 2006 a total of 1014 patients who underwent coronary bypass graft surgery in a cross-sectional study was included in this study. Results: Logistic regression analysis was conducted and the risk factors that significantly predicted sternal wound complications after coronary artery bypass graft surgery included older age, Diabetes mellitus, increasing BMI, and in class three or four of the New York Heart Association functional class. Most infections had a late and the majority of these were caused by staphylococcus epidermidis while o...
Background: Surgical site infections following coronary artery bypass graft (CABG) procedures pose substantial burden on patients and healthcare systems. This study aims to describe the incidence of surgical site infections and causative pathogens following CABG surgery over the period 2003-2012, and to identify risk factors for complex sternal site infections. Methods: Routine computerised surveillance data were collected from three public hospitals in Queensland, Australia in which CABG surgery was performed between 2003 and 2012. Surgical site infection rates were calculated by types of infection (superficial/complex) and incision sites (sternal/harvest sites). Patient and procedural characteristics were evaluated as risk factors for complex sternal site infections using a logistic regression model. Results: There were 1,702 surgical site infections (518 at sternal sites and 1,184 at harvest sites) following 14,546 CABG procedures performed. Among 732 pathogens isolated, Methicillin-sensitive Staphylococcus aureus accounted for 28.3% of the isolates, Pseudomonas aeruginosa 18.3%, methicillin-resistant Staphylococcus aureus 14.6%, and Enterobacter species 6.7%. Proportions of Gram-negative bacteria elevated from 37.8% in 2003 to 61.8% in 2009, followed by a reduction to 42.4% in 2012. Crude rates of complex sternal site infections increased over the reporting period, ranging from 0.7% in 2004 to 2.6% in 2011. Two factors associated with increased risk of complex sternal site infections were identified: patients with an ASA (American Society of Anaesthesiologists) score of 4 or 5 (reference score of 3, OR 1.83, 95% CI 1.36-2.47) and absence of documentation of antibiotic prophylaxis (OR 2.03, 95% CI 1.12-3.69). Conclusions: Compared with previous studies, our data indicate the importance of Gram-negative organisms as causative agents for surgical site infections following CABG surgery. An increase in complex sternal site infection rates can be partially explained by the increasing proportion of patients with more severe underlying disease.
European Journal of Cardio-Thoracic Surgery, 2003
Objective: To identify risk factors for sternal wound infection following coronary artery bypass surgery (CABG), and to compare early and mid-term survival outcome. Methods: Data were prospectively collected for 4228 patients who underwent CABG surgery between April 1997 and March 2001. One hundred and nine (2.6%) patients developed sternal wound infection. We used logistic regression to identify independent risk factors associated with post-operative sternal wound infection. Patient records were linked to the National Strategic Tracing Service, which records all deaths in the UK, to establish current vital status. Deaths occurring over time were described using Kaplan-Meier techniques. To control for differences in patient characteristics, we used Cox proportional hazards analysis to calculate adjusted hazard ratios (HR) and 95% confidence intervals (CI). Results: The results of the logistic regression analysis found that the independent predictors of sternal wound infection were obesity (odds ratio (OR) 2.0; P , 0:001), New York Heart Association class $ 3 (OR 1.6; P ¼ 0:022), use of bilateral internal mammary arteries (OR 3.2; P , 0:001), increasing number of grafts (OR 1.5; P , 0:001), re-exploration for bleeding (OR 3.1; P ¼ 0:011), and increased duration of mechanical ventilation (for every 10 h (OR 1.12; P , 0:001)). Three hundred and forty one (8.1%) deaths occurred during the study period with mean follow up of 3.2^1.3 years. The crude HR of mid-term mortality for sternal wound infection patients was 2.51 (95% CI 1.59-3.94, P , 0:001). After adjustment for pre, intra and post-operative factors, the adjusted HR of mid-term mortality for sternal wound infection patients was 1.64 (95% CI 1.03-2.61, P ¼ 0:037). The adjusted freedom from death for sternal wound infections at 30 days, and 1, 2 and 4 years was 96.8, 93.7, 91.4 and 86.7%, respectively, compared with 98.1, 96.1, 94.7 and 91.7% for patients without sternal wound infections. Conclusions: In conclusion, we have identified risk factors for sternal wound infection, many of which are modifiable. We have also shown that there is a significant increase in mortality in patients with sternal wound infection during a 4-year follow-up period after CABG.
BMC Infectious Diseases, 2007
Background Sternal wound infection (SWI) is an uncommon but potentially life-threatening complication of cardiac surgery. Predisposing factors for SWI are multiple with varied frequencies in different studies. The purpose of this study was to assess the incidence, risk factors, and mortality of SWI after coronary artery bypass grafting (CABG) at Tehran Heart Center. Methods This study prospectively evaluated multiple risk factors for SWI in 9201 patients who underwent CABG at Tehran Heart Center between January 2002 and February 2006. Cases of SWI were confirmed based on the criteria of the Centers for Disease Control and Prevention. Deep SWI (bone and mediastinitis) was categorized according to the Oakley classification. Results In the study period, 9201 CABGs were performed with a total SWI rate of 0.47 percent (44 cases) and deep SWI of 0.22 percent (21 cases). Perioperative (in-hospital) mortality was 9.1% for total SWI and about 14% for deep SWI versus 1.1% for non-SWI CABG patients. Female gender, preoperative hypertension, high functional class, diabetes mellitus, obesity, prolonged intubation time (more than 48 h), and re-exploration for bleeding were significant risk factors for developing SWI (p = 0.05) in univariate analysis. In multivariate analysis, hypertension (OR = 10.7), re-exploration (OR = 13.4), and female gender (OR = 2.7) were identified as significant predictors of SWI (p Conclusion Rarely reported previously, the two risk factors of hypertension and the female gender were significant risk factors in our study. Conversely, some other risk factors such as cigarette smoking and age mentioned as significant in other reports were not significant in our study. Further studies are needed for better documentation.
Heart Surgery Forum, 2014
Mediastinitis is a devastating sternal wound complication. The aim of this study was to identify the incidence, risk factors, mortality, and different treatment modalities of mediastinitis after isolated coronary artery bypass grafting. From January 2007 to May 2010, 1424 patients who underwent isolated coronary artery bypass grafting were studied retrospectively; 1398 (group 1) had no mediastinitis, and 26 (group 2) developed mediastinitis. The diagnosis and classification of mediastinitis were based on the criteria of the Center for Disease Control and Prevention and the Emory classification, respectively. Multivariate analysis showed only 4 risk factors: diabetes mellitus, obesity, prolonged postoperative intensive care unit stay, and prolonged intubation time. On univariate analysis, female sex, renal failure, and reexploration for bleeding were also significant risk factors. The incidence of mediastinitis (1.83%) and the subsequent mortality rate (7.69%) were comparable to those of previous reports. Early detection and aggressive management of mediastinitis play major roles in decreasing the related mortality and morbidity. The Emory classification with some modification is very helpful in choosing the proper treatment modality.
Deep Sternal Wound Infections after Coronary Artery Bypass Grafting: Analysis of 29 Cases from Iraq
World Journal of Cardiovascular Surgery
Background: Deep sternal wound infection (DSWI), or mediastinitis, is a devastating complication of coronary artery bypass grafting (CABG). This prospective study aimed to assess our management of DSWI in view of the published literature. Methods: Over 2-years (ending in January 2016), 29 patients (20 males) developed DSWI amongst 520 patients who underwent standard CABG surgeries (5.6%). Pre-, intra-and postoperative variables were documented. Whenever possible, the infections were culture-verified. Besides antibiotics, patients received one or more of the following therapies: drainage, debridement, closed irrigation, sternal rewiring , vacuum-assisted closure (VAC), and bone resection. Results: the male to female ratio was 2.2:1. Mean age was 58.1 ± 7.3 years. The mean body mass index (BMI) was 27.9 ± 3.4 kg/m 2. There were 18, 16 and 11 patients with diabetes mellitus (DM), hypertension and chronic obstructive pulmonary disease (COPD) respectively. Cardiopulmonary bypass (CPB) was utilized in 26 (89.7%) patients with a mean time of 117.5 ± 23.3 minutes. Most surgeries (n = 21, 72.4%) lasted 5-6 hrs. According to Pairolero classification, there were 3 (10.3%) Type I, 22 (75.9%) Type II and 4 (13.8%) Type III infections. Four (13.8%) cases were culture-verified. Twenty-three (79.3%) DSWIs were surgically managed. Sternal rewiring was performed in 14 (48.3%) cases while VAC was added to other therapies in 2 (6.9%) patients. DSWIs completely resolved in 18 (62.0%) patients within 3-24 weeks while two (6.9%) patients died within 30 days. Conclusion: We have identified six independent risk factors for DSWI (male gender, obesity, DM, hypertension, COPD and CPB), five of them are modifiable.