Space Surgical Site Infection Research Articles

IMPLEMENTING “BUNDLED INTERVENTIONS” IN REDUCING SURGICAL SITE INFECTIONS AMONG PATIENTS UNDERGOING SURGERY FOR GYNECOLOGICAL INDICATIONS – A PROSPECTIVE STUDY

Objective: Surgical site infection (SSI) is the most common infection among surgical patients. This study evaluated the impact of bundled interventions in reducing SSI rates in gynecological surgery. Therefore, it is a vital tool to improve patient safety. Methods: One hundred study participants were taken in the tertiary care hospital and divided into Group I and Group II. In Group I, 50 patients were involved in elective OT with bundled interventions, and in Group II, 50 controls operated in identical OT without bundled intervention. Incidence of SSI, type of SSI, antibiotic usage, need for secondary suturing, duration, etc., was noticed. Results: Our findings showed that six out of fifty cases developed the symptoms with a 10% SSI rate. Two had superficial SSI, and three had deep SSI. None of the patients had organ space SSI. In the control group, the SSI rate was 12%. The bundled intervention was associated with a significant reduction in infection rate. Conclusion: The study indicates that SSIs are associated with severe morbidity and mortality. It is a straightforward, feasible approach to the reduction of the SSI rate.

The Impact of an Evidence-Based Bundle on Cesarean Section-Related Surgical Site Infections: A Randomized Clinical Trial

Abstract Objective To compare the effectiveness of an evidence-based bundle in minimizing cesarean section (CS)-related surgical site infections (SSIs) with that of standard routine care. Methods This was a single-center, parallel, and randomized clinical trial conducted at KAHER’s Dr. Prabhakar Kore Charitable Hospital, Belagavi, India, from January 2021 to December 31, 2021. Three hundred twenty women undergoing CS delivery were selected and allocated into two groups (1:1) using simple randomization with fixed allocation. An evidence-based surgical bundle (a combination of more than three perioperative interventions) was used for the intervention group, whereas the control group received routine standard perioperative care. The primary outcome was the incidence of SSI (superficial, deep, and organ or space SSIs) within 6 weeks postpartum in both groups. Categorical and continuous data were analyzed using appropriate statistical tests with a significance threshold set at P < 0.05. Results In this study, 16 and 17 participants each from the control and intervention groups, respectively, were lost to follow-up, resulting in a total of 144 and 143 study participants included in the respective groups. Twenty-eight (19.4%) and 14 (9.8%) women developed SSI in the control and intervention groups, respectively (P = 0.02). Methicillin-resistant Staphylococcus aureus was the most common cause of SSI in both groups (63.6% (7/11) and 100% (3/3) in the control and intervention groups, respectively). Conclusion The use of the evidence-based bundle for CS-related SSI prevention effectively decreased the incidence of SSI by half compared to standard routine practice. Implementing the use of this bundle in routine perioperative care will reduce the cost of CS and improve health outcomes in CS. Trial registration Clinical Trials Registry-India (www.ctri.nic.in). Registration number: CTRI/2020/11/029246.

Obesity and Reconstructive Pelvic Surgery: An ACS NSQIP Study.

Obesity is steadily increasing in the United States and is a risk factor for many medical and surgical complications. Literature is limited regarding obesity as an independent risk factor for perioperative complications after reconstructive pelvic surgery (RPS). This study aimed to analyze the association of obesity on 30-day perioperative complications after RPS. This was a database study comparing perioperative complications after RPS of obese versus nonobese patients using the American College of Surgeons National Surgical Quality Improvement Program. Patients who underwent surgery for uterovaginal or vaginal vault prolapse were selected, and perioperative outcomes were compared between obese and nonobese patients. Obesity was defined as a body mass index ≥30 (calculated as weight in kilograms divided by height in meters squared). A total of 13,302 patients met the inclusion criteria and were included in this study; 4,815 patients were obese, whereas 8,487 were nonobese. The overall rate of any 30-day postoperative complication was 6.8%, and the rate of complications did not differ between groups. Superficial and organ space surgical site infections were significantly higher in the obese cohort, whereas nonobese patients were more likely to receive a blood transfusion. A multivariable logistic regression model was performed with variables that were statistically significant on bivariate analysis and deemed clinically significant. Variables included obesity, age, American Society of Anesthesiologists class, current smoker, diabetes, hypertension, operative time, colpopexy, and obliterative procedure. After controlling for potential confounding factors, obesity was not associated with any 30-day postoperative complications after pelvic organ prolapse surgery. Obesity was not associated with 30-day postoperative complications after RPS after controlling for possible confounding variables.

Optimizing antibiotic management for patients with acute appendicitis: A quality improvement study

BackgroundTo decrease surgical site infections after appendectomy for acute appendicitis, preoperative broad-spectrum antibiotics are often used in clinical practice. However, this treatment strategy has come under scrutiny because of increasing rates of antibiotic-resistant infections. MethodsThe aim of this multisite quality improvement project was to decrease the treatment of uncomplicated acute appendicitis with piperacillin-tazobactam without increasing the rate of surgical site infections. Our quality improvement intervention had 2 distinct components: (1) updating electronic health record orders to encourage preoperative administration of narrow-spectrum antibiotics and (2) educating surgeons and emergency department clinicians about selecting appropriate antibiotic therapy for acute appendicitis. Patient demographics, clinical characteristics, and outcomes were compared 6 months before and after implementation of the quality improvement intervention. ResultsA total of 352 laparoscopic appendectomies were performed during the 6-month preintervention period, and 369 were performed during the 6-month postintervention period. The preintervention period and postintervention period groups had similar baseline demographics, vital signs, and laboratory test values. The rate of preoperative piperacillin-tazobactam administration significantly decreased after the intervention (51.4% preintervention period vs 20.1% postintervention period, P < .001). The rate of surgical site infections was similar in both groups (superficial surgical site infections = 1.4% preintervention period vs 0.8% postintervention period, P = .50; deep surgical site infections = 1.1% preintervention period vs 0.0% postintervention period, P = .06; and organ space surgical site infections = 3.1% preintervention period vs 3.0% postintervention period, P > .99). Rates of 30-day readmission, reoperation, and Clostridioides difficile infection also did not differ between groups. ConclusionOur quality improvement intervention successfully decreased piperacillin-tazobactam administration without increasing the rate of surgical site infections in patients with acute appendicitis.

Open Fixation After Preperitoneal Pelvic Packing Is Associated With a High Surgical Site Infection Rate.

To evaluate the incidence of pelvic space surgical site infection (SSI) after preperitoneal pelvic packing (PPP) for persistent hemodynamic instability. Retrospective comparative study. Urban Level 1 trauma center. 83 patients who received PPP and 55 patients who had open reduction and internal fixation (ORIF) of the anterior pelvic ring without PPP. Operative fixation. Pelvic space SSI. The SSI rate in the PPP group was 31.3% (26/83) compared with 10.9% (6/55) in the control group (proportional difference 20.4%, confidence interval (CI) 6.4-32.5, P = 0.007). Patients in the PPP group (n = 43) were 1:1 propensity score matched with patients in the control group to account for differences in Injury Severity Score and American Society of Anesthesiologists score. In this matched cohort, the rate of pelvic space SSI remained higher in the PPP group compared with that in the control group (30.2% vs. 9.3%; proportional difference 20.9%, CI, 3.7-36.3; P = 0.02). On multivariate analysis of the PPP group, anterior ORIF (odds ratio 6.56, CI, 2.00-21.47, P = 0.002) was found to be independently associated with SSI. PPP is an independent risk factor of space SSI. The likelihood of SSI after PPP is increased with anterior ORIF. The morbidity of SSI after PPP must be weighed against the risk of exsanguination. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

How the COVID-19 pandemic affected the severity and clinical presentation of diverticulitis.

Single-institution studies showed that patients presented with more severe diverticulitis and underwent more emergency operations during the coronavirus disease 2019 (COVID-19) pandemic. Therefore, we studied this trend using nationwide data from the American College of Surgeons National Surgical Quality Improvement Program database. Patients (n = 23,383) who underwent a colectomy for diverticulitis in 2018 (control year) and 2020 (pandemic year) were selected. We compared these groups for differences in disease severity, comorbidities, perioperative factors, and complications. During the pandemic, colonic operations for diverticulitis decreased by 13.14%, but the rates of emergency operations (17.31% vs. 20.04%, P< 0.001) and cases with a known abscess/perforation (50.11% vs. 54.55%, P< 0.001) increased. Likewise, the prevalence of comorbidities, such as congestive heart failure, acute renal failure, systemic inflammatory response syndrome, and septic shock, were higher during the pandemic (P< 0.05). During this same period, significantly more patients were classified under American Society of Anesthesiologists classes 3, 4, and 5, suggesting their preoperative health states were more severe and life-threatening. Correspondingly, the average operation time was longer (P< 0.001) and complications, such as organ space surgical site infection, wound disruption, pneumonia, acute renal failure, septic shock, and myocardial infarction, increased (P< 0.05) during the pandemic. During the pandemic, surgical volume decreased, but the clinical presentation of diverticulitis became more severe. Due to resource reallocation and possibly patient fear of seeking medical attention, diverticulitis was likely underdiagnosed, and cases that would have been elective became emergent. This underscores the importance of monitoring patients at risk for diverticulitis and intervening when criteria for surgery are met.

Outcomes Among Malnourished Patients With Crohn's Disease Undergoing Elective Ileocecectomy: A Nationwide Analysis.

Crohn's patients' nutritional status can be suboptimal given disease pathophysiology; the effect of a malnourished state prior to elective surgery on post-operative outcomes remains to be more clearly elucidated. This study aims to characterize the effect of malnutrition on post-operative outcomes and readmission patterns for Crohn's patients undergoing elective ileocecectomy using a nationally representative cohort. The colectomy-targeted National Surgical Quality Improvement Program Database (2016-2020) was used to identify patients with Crohn's disease without systemic complications who underwent elective ileocecectomy; emergency surgeries were excluded. Malnourished status was defined as pre-operative hypoalbuminemia <3.5g/dL, weight loss >10% in 6months, or body mass index <18.5kg/m2 prior to surgery. Of 1464 patients (56% female) who met inclusion criteria, 1137 (78%) were well-nourished and 327 (22%) were malnourished. Post-operatively, malnourished patients had more organ space surgical site infections (SSI) (9% vs 4% nourished groups, P < .001) and more bleeding events requiring transfusion (9% vs 3% nourished, P < .001). 30-day unplanned readmission was higher in the malnourished group (14% vs 9% nourished, P = .032). Index admission length of stay was significantly longer in the malnourished group (4days [3-7days] vs the nourished cohort: 4days [3-5days], P < .001). Poor nutritional status is associated with organ space infections and bleeding as well as longer hospitalizations and more readmissions in Crohn's patients undergoing elective ileocecectomy. A detailed nutritional risk profile and nutritional optimization is important prior to elective surgery.

Risk of hysterectomy at the time of myomectomy: an underestimated surgical risk

To evaluate the risk of hysterectomy at the time of myomectomy, and the associated 30-day postoperative morbidity. Cohort study. Patients who underwent myomectomies identified from the American College of Surgeons' National Surgical Quality Improvement Program from 2010-2021. Current Procedural Technology codes were used to identify myomectomies performed with or without concurrent hysterectomy. Pre-operative characteristics and morbidity outcomes were obtained. Univariate analysis was performed using Chi-Square and Fisher Exact as appropriate. Multivariable logistic regression reported risk factors for individuals undergoing hysterectomy at the time of myomectomy. P values <0.05 were considered statistically significant. A total of 13,213 individuals had a myomectomy. 399 (3.0%) had a hysterectomy performed during myomectomy. Concurrent hysterectomy was most frequently performed (7.1%) with laparoscopic approach, followed by 3.2% and 1.9% with abdominal and hysteroscopic approach, respectively. Age ≥43 years, obesity class II and higher, American Society of Anesthesiologists (ASA) class greater than II, tobacco use, longer operative time (>85 min) and laparoscopic approach significantly elevated the risk of hysterectomy. When adjusting for age, body mass index, race, ASA class, case type, surgical approach, operative time, preoperative transfusion, preoperative hematocrit, and high fibroid burden, increased odds of hysterectomy was noted for White race, longer operative time, ASA class III or higher, obesity, laparoscopic approach and low fibroid burden. Patients who underwent concurrent hysterectomy had longer median length of hospital stay (2 vs 1 day), longer median operative time (161 vs 126 minutes), increased intraoperative/postoperative blood transfusions (14.5 vs 9.0%), higher organ space surgical site infections (1.5 vs 0.5%), and return to surgery (2.0 vs 0.7%) compared to patients who did not (p< 0.05). The risk of a major complication within 30 days of myomectomy was increased for patients who underwent concurrent hysterectomy after adjusting for relevant confounders (adjusted OR 2.4, 95% CI 1.8-3.2). Risk of hysterectomy during a myomectomy is higher than previously reported. Patient age ≥43 years, obesity, White race, ASA class III or higher, longer operative time, and laparoscopic approach were associated with higher odds of hysterectomy. Identification of patients with these risk factors can aid in patient counselling and surgical planning, which may help reduce the unexpectedly high rates of hysterectomy at planned myomectomy.

Development of machine learning models for the detection of surgical site infections following total hip and knee arthroplasty: a multicenter cohort study

BackgroundPopulation based surveillance of surgical site infections (SSIs) requires precise case-finding strategies. We sought to develop and validate machine learning models to automate the process of complex (deep incisional/organ space) SSIs case detection.MethodsThis retrospective cohort study included adult patients (age ≥ 18 years) admitted to Calgary, Canada acute care hospitals who underwent primary total elective hip (THA) or knee (TKA) arthroplasty between Jan 1st, 2013 and Aug 31st, 2020. True SSI conditions were judged by the Alberta Health Services Infection Prevention and Control (IPC) program staff. Using the IPC cases as labels, we developed and validated nine XGBoost models to identify deep incisional SSIs, organ space SSIs and complex SSIs using administrative data, electronic medical records (EMR) free text data, and both. The performance of machine learning models was assessed by sensitivity, specificity, positive predictive value, negative predictive value, F1 score, the area under the receiver operating characteristic curve (ROC AUC) and the area under the precision–recall curve (PR AUC). In addition, a bootstrap 95% confidence interval (95% CI) was calculated.ResultsThere were 22,059 unique patients with 27,360 hospital admissions resulting in 88,351 days of hospital stay. This included 16,561 (60.5%) TKA and 10,799 (39.5%) THA procedures. There were 235 ascertained SSIs. Of them, 77 (32.8%) were superficial incisional SSIs, 57 (24.3%) were deep incisional SSIs, and 101 (42.9%) were organ space SSIs. The incidence rates were 0.37 for superficial incisional SSIs, 0.21 for deep incisional SSIs, 0.37 for organ space and 0.58 for complex SSIs per 100 surgical procedures, respectively. The optimal XGBoost models using administrative data and text data combined achieved a ROC AUC of 0.906 (95% CI 0.835–0.978), PR AUC of 0.637 (95% CI 0.528–0.746), and F1 score of 0.79 (0.67–0.90).ConclusionsOur findings suggest machine learning models derived from administrative data and EMR text data achieved high performance and can be used to automate the detection of complex SSIs.

A comparison of open or laparoscopic colectomy outcomes for the management of ischemic colitis using the ACS-NSQIP database

Ischemic colitis is a common manifestation of intestinal ischemia and is potentially a surgical emergency. Although such surgical emergencies were historically approached via open exploration, it is uncertain if there is a role for minimally invasive techniques. This study compares open vs laparoscopic colectomy techniques in the management of ischemic colitis. Using the American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) database, patients with ischemic colitis undergoing colectomy from 2005 to 2019 were compared. The primary outcome of interest was 30-day mortality. Additional outcomes of interest were procedure related readmission, procedure related reoperation, length of stay, surgical site infections (SSI), septic shock, and other complications. Outcomes of interest were compared using multivariate logistic regression. 7,928 patients had ischemic colitis with 7,209 undergoing open colectomy and 719 undergoing laparoscopic colectomy. The mortality rate was significantly lower using a laparoscopic approach compared to open (6.4% vs 26%, p=<0.001) and associated with a lower odd of mortality (OR 0.58; 95% CI [0.35, 0.95]). Procedure related reoperation was lower in the laparoscopic group (6.5% vs 11%, p<0.001), but multivariate analysis was not significant (OR 0.65; 95% CI [0.43,1]). Readmission rates were not statistically different (12% vs 10%, p = 0.2). Postoperative length of stay (7 vs 12 days, p=<0.001), septic shock (6.7% vs 27%, p=<0.001), and organ space SSI (3.2% vs 6.9%, p=<0.001) were significantly decreased using a laparoscopic approach. 30-day postoperative mortality was significantly lower using a laparoscopic. Patients that had a laparoscopic colectomy had shorter hospital stays. While patients that underwent laparoscopic procedures tended to be less sick, multivariate analysis showed decreased rates of sepsis and surgical site infections compared to open colectomies when correcting for these factors. Laparoscopic colectomy may be a better surgical approach for patients with ischemic colitis compared to open colectomy.

Mesh Type With Ventral Hernia Repair: A Systematic Review and Meta-analysis of Randomized Trials

IntroductionSynthetic mesh is widely utilized for clean ventral hernia repair; however, it is unclear if synthetic mesh provides the same benefits with high-risk patients or during contaminated cases. Many surgeons use biologic mesh in these settings, but there is little evidence to support this practice. Our objective was to compare the clinical outcomes of utilizing biologic mesh versus synthetic mesh during ventral hernia repair. MethodsFollowing Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines, a review of the literature was conducted using Cochrane library, EMBASE, Clinicaltrials.gov, and PubMed for randomized controlled trials published that compared biologic versus synthetic mesh during ventral hernia repair. The primary outcome was major complications defined as deep or organ space surgical site infection, reoperations, and hernia recurrences. ResultsOf 1889 manuscripts screened, four publications were included. The four studies included a total of 758 patients, with 381 receiving biologic mesh and 377 receiving synthetic mesh. Compared to biologic mesh, synthetic mesh had lower rates of major complications (38.6% versus 23.4, risk ratio = 0.55, 95% confidence interval = 0.35 to 0.86, P = 0.009) and hernia recurrence (24.5 % versus 10.3%, risk ratio = 0.44, 95% confidence interval = 0.28 to 0.69, P = 0.004). In addition, there was a lower percentage of surgical site infection and reoperation in the synthetic mesh group. ConclusionsContrary to current surgical teaching, placement of permanent synthetic mesh into a contaminated field yielded rates of complications that were comparable or reduced compared to biologic mesh.

Risk Factors for Major Complications Following Minimally Invasive Surgeries for Endometriosis in the United States

To study the rate and risk factors for short-term postoperative complications of patients undergoing minimally invasive surgery (MIS) for endometriosis in the United States. Retrospective cohort study. American College of Surgeons National Surgical Quality Improvement Program database from 2012 to 2020. Patients with endometriosis diagnosis. Laparoscopic surgery for endometriosis. We compared women with and without 30-day postoperative major complications, defined according to the Clavien-Dindo classification. A total of 28 697 women underwent MIS during the study period, of which 2.6% had major postoperative complications. Organ space surgical site infection and reoperation were the most common complications (47.0% and 39.8%, respectively). In multivariable regression analysis, African American race (adjusted odds ratio [aOR] 95% confidence interval [CI] 1.61 [1.29-2.01], p <.001), hypertension (aOR 95% CI 1.23 [1.01-1.50], p=.036), bleeding disorders (aOR 95% CI 1.96 [1.03-3.74], p=.041), bowel procedures (aOR 95% CI 1.93 [1.37-2.72], p <.001) and hysterectomy (aOR 95% CI 2.09 [1.67-2.63], p <.001) were independently associated with increased risk of major complications. In multivariable regression analysis of laparoscopies without bowel procedures, African American race, bleeding disorders, and hysterectomy were independently associated with increased major complication risk. Among cases with bowel procedures, African American race and colectomy were independently associated with increased major complication risk. In multivariable regression analysis of women who underwent hysterectomy, African American race, bleeding disorders, and lysis of adhesions were independently associated with increased major complications risk. Among women who underwent uterine-sparing surgery, African American race, hypertension, preoperative blood transfusion, and bowel procedures were independently associated with increased major complications risk. Among women undergoing MIS for endometriosis, African American race, hypertension, bleeding disorders, and bowel surgery or hysterectomy are risk factors for major complications. African American race is a risk factor for major complications among women undergoing surgeries with and without bowel procedures or hysterectomy.

Predictors for surgical site infection in patients undergoing therapeutic or prophylactic intra-abdominal onlay mesh (IPOM) implantation in clean and contaminated surgical fields

BackgroundProphylactic intra-abdominal onlay mesh (IPOM) implantation has been shown to reduce the rate of fascial dehiscence and incisional hernia. However, surgical site infection (SSI) in presence of an IPOM remains a concern. The aim of this study was to assess predictors for SSI following IPOM placement in hernia and non-hernia abdominal surgery in clean and contaminated surgical fields.MethodsObservational study including patients undergoing IPOM placement at a Swiss tertiary care hospital 2007–2016. IPOM implantation was performed in hernia and non-hernia elective and emergency abdominal surgery, including contaminated and infected surgical fields. The incidence of SSI was prospectively assessed by Swissnoso according to CDC criteria. The effect of disease- and procedure-related factors on SSI was assessed in multivariable regression analysis, adjusting for patient-related factors.ResultsA total of 1072 IPOM implantations were performed. Laparoscopy was performed in 415 patients (38.7%), laparotomy in 657 patients (61.3%). SSI occurred in 172 patients (16.0%). Superficial, deep, and organ space SSI were found in 77 (7.2%), 26 (2.4%), and 69 (6.4%) patients, respectively. Multivariable analysis revealed emergency hospitalization (OR 1.787, p = 0.006), previous laparotomy (1.745, p = 0.029), duration of operation (OR 1.193, p < 0.001), laparotomy (OR 6.167, p < 0.001), bariatric (OR 4.641, p < 0.001), colorectal (OR 1.941, p = 0.001), and emergency (OR 2.510, p < 0.001) surgery, wound class ≥ 3 (OR 3.878, p < 0.001), and non-polypropylene mesh (OR 1.818, p = 0.003) as independent predictors for SSI. Hernia surgery was independently associated with a lower risk for SSI (OR 0.165, p < 0.001).ConclusionThis study revealed emergency hospitalization, previous laparotomy, duration of operation, laparotomy, as well as bariatric, colorectal, and emergency surgery, abdominal contamination or infection, and usage of non-polypropylene mesh as independent predictors for SSI. In contrast, hernia surgery was associated with a lower risk for SSI. The knowledge of these predictors will help to balance benefits of IPOM implantation against the risk for SSI.Graphical abstract

Effect of Present at Time of Surgery (PATOS) on Outcomes in Pancreatic Surgery

IntroductionWhile there is some data available on the importance of accounting for the effect of present at time of surgery (PATOS) when estimating unadjusted postoperative complication rates, little is known about the impact of PATOS on outcomes in patients undergoing pancreatic surgery specifically. By taking PATOS into account, we hypothesized that unadjusted, observed postoperative complication rates might be reduced, with these reductions being different across outcomes; however, we expected fewer differences in risk-adjusted results, i.e., observed to expected ratios (O/E ratios). MethodsWe retrospectively analyzed the ACS NSQIP Participant Use Files (PUFs) from 2015 to 2019. PATOS data were analyzed for the 8 postoperative complications of superficial, deep, and organ space surgical site infection; pneumonia; urinary tract infection; ventilator dependence; sepsis; and septic shock. Postoperative complication rates were compared by ignoring PATOS vs. taking PATOS into account. ResultsOf the 31,919 patients in the ACS NSQIP PUFs who underwent pancreatic surgery, 1120 (3.51%) patients had one or more PATOS conditions. The event rates after taking PATOS into account declined for all outcomes—superficial surgical site infection (SSI) rates reduced by 2.56%, deep SSI rates reduced by 4.28%, organ space SSI rates reduced by 9.31%, pneumonia rates reduced by 2.91%, urinary tract infection rates declined by 4.69%, and septic shock rates declined by 9.27%. ConclusionOur paper highlights that accounting for PATOS is important for estimating unadjusted postoperative complication rates in patients undergoing pancreatic surgery. Risk adjustment is essential to any attempt at quality assessment and benchmarking. Failure to account for PATOS may penalize surgeons who care for the sickest and most complicated patients and subsequently encourage cherry-picking of less risky patients and procedures.

180. Did The National Ban On Bacitracin Irrigation Affect Infection Rates In Implant-based Breast Reconstruction? An Analysis Of A National Database

PURPOSE: The current standard of practice in implant-based breast reconstruction is irrigation of the mastectomy pocket with antimicrobial solution before implant placement. Prior to being banned and formally recalled in January 2020, bacitracin was a very commonly utilized antibiotic. This study characterizes the effects of the national bacitracin ban on implant-based breast reconstruction infection rates by using a nationwide database to compare complication rates before and after bacitracin was banned. METHODS: The American College of Surgeons National Surgical Quality Improvement (ACS-NSQIP) database was queried retrospectively for all patients who underwent implant-based breast reconstruction before the bacitracin ban (2012-2019) and afterwards (2020). Demographics, comorbidities, and complications were collected. Univariate analysis and multivariate analysis were conducted to determine if there were significant changes in wound complications, local wound infections, and systemic infections between the two case-control matched cohorts. RESULTS: A total of 37,126 patients were in the pre-ban cohort and 6,333 patients were in the post-ban cohort. Before matching, there were significant differences in race distribution, BMI, ASA class, inpatient versus outpatient status, preoperative smoking, and preoperative diabetes mellitus (all p<0.05). After case-control matching, there were 6,313 patients in each cohort. Univariate analysis revealed differences in postoperative superficial and organ space surgical site infection, wound complications/infections, all cause complications, and reoperations (all p<0.05). Multivariate analysis showed that patients who underwent breast reconstruction before the ban had decreased odds of having wound infections, related infections, all cause complications, and reoperations (all p<0.05). CONCLUSION: This study provides a macroscopic view into the effects of the formal injectable bacitracin ban on breast reconstruction outcomes. Patients who underwent implant-based breast reconstruction after the ban of injectable bacitracin had higher odds of developing wound infections, related infections, and reoperations. More study into suitable alternatives to injectable bacitracin for surgical site antimicrobial irrigation is warranted.

Does Closed Incision Negative Pressure Wound Therapy Reduce Surgical Site Infection in Endometrial Carcinoma Patients Undergoing Laparotomy? A Multicentre Retrospective Cohort Study

Background: Endometrial cancer is the most common gynaecological cancer and has a strong association with obesity. Surgical site infection (SSI) carries high morbidity and is more frequent in obese patients. Closed incision negative pressure wound therapy (ciNPWT) has been proposed to reduce wound morbidity but is more expensive than standard dressings whilst the evidence has been very heterogenous. There is limited evidence to justify this expensive dressing as related to its effectiveness in gynaecological oncology patients. ciNPWT was introduced in New Zealand in 2017 based on the available evidence from studies on SSI in the obstetric population. The aim of this study is to investigate the rate of SSI in patients with endometrial carcinoma undergoing laparotomy using standard surgical dressings compared to ciNPWT. Methods: We performed a retrospective analysis of 170 patients who underwent a laparotomy for endometrial carcinoma between 2018 and 2019 across three hospitals in New Zealand after the introduction of ciNPWT. Dressings were applied according to individual surgeons’ preferences. Standard dressings and ciNPWT were compared in the occurrence of SSI, wound dehiscence, readmission and return to theatre rates using logistic regression in order to account for potential confounding due to the patient demographics and oncologic and surgical characteristics. Results: There were 129 patients in the standard dressing group and 41 patients in the ciNPWT group. The mean age was 60.4 years (range 25–86). The mean body mass index (BMI) was 38.2 kg/m2 (range 20–69 kg/m2). The percentage of patients who experienced a SSI was higher in the ciNPWT group (34.2% vs. 20.9%; p = 0.159). There was no significant difference between the dressing groups in the occurrence of superficial SSI rate, return to theatre, or readmission. Wound dehiscence and deep/organ space SSI were however worse with ciNPWT (adjusted odds ratio (aOR) 4.09 and aOR 7.19, respectively). Conclusions: This study demonstrated no evidence for the benefit of ciNPWT, and higher rates of deep/organ space SSI. More randomised trials are needed to investigate whether gynaecological oncology patients may benefit from ciNPWT thus justifying the extra cost of this dressing.

Evaluation of Perioperative Factors Contributing to Organ Space Surgical Site Infection After Minimally Invasive Hysterectomy [ID: 1374862

INTRODUCTION: Postoperative organ space surgical site infection (oSSI), commonly referred to as pelvic abscess, is a clinically impactful complication after hysterectomy. Although more common in open hysterectomies, oSSIs occur in minimally invasive hysterectomy (MIH), contributing to morbidity. In the current study, we evaluate perioperative factors contributing to development of oSSIs in patients undergoing MIH. METHODS: From 2016 to 2022, a multicenter retrospective analysis of patients undergoing MIH was conducted. Patient characteristics, preexisting conditions, surgical history, intraoperative factors, and type of MIH were evaluated to determine factors contributing to the development of oSSI. RESULTS: One thousand one hundred eighty-nine patients underwent MIH. 28 patient (2.4%) developed oSSI. There was no difference in age or body mass index between groups (P&gt;.05) and no difference in the incidence of oSSI based on type of MIH (P=.832). Patients with endometriosis were more likely to develop oSSI (4.9% versus 2.0%, P=.045, odds ratio [OR] 2.49, 95% CI 1.98–6.25). A diagnosis of cancer did not affect oSSI (3.9% versus 2.1%, P=.162, OR 1.90, 95% CI 0.76–4.78). History of diabetes, hypertension, cesarean delivery, prior laparoscopy, prior laparotomy, smoking, or obesity did not affect the incidence of oSSI (P&lt;.05). Patients developing oSSI had a greater mean intraoperative estimated blood loss (EBL) (233.55 cc versus 94.3 cc, P&lt;.001), greater mean length of stay (LOS) (2.4 versus 0.9 days, P&lt;.001), higher incidence of post-operative ileus (15.8% versus 0.7%, P&lt;.001) and blood transfusion (34.6% versus 1.0%, P&lt;.001). CONCLUSION: Development of oSSI is associated with preexisting endometriosis and greater intraoperative EBL. Development of oSSI was associated with greater LOS, postoperative ileus, and blood transfusions. Attention to hemostasis may reduce rates of oSSI.

Machine Learning Model for Assessment of Risk Factors and Postoperative Day for Superficial vs Deep/Organ-Space Surgical Site Infections.

Background. Deep and organ space surgical site infections (SSI) require more intensive treatment, may result in more severe clinical disease and may have different risk factors when compared to superficial SSIs. Machine learning (ML) algorithms provide the opportunity to analyze multiple factors to predict of the type and time of development of SSI. Therefore, we developed a ML model to predict type and postoperative week of SSI. Methodology. A case-control study was conducted among patients who developed a SSI after undergoing general surgery procedures at a tertiary care hospital between 2019 to 2020. Patients were followed for 30 days. Six ML algorithms were trained as predictors of type of infection (superficial vs deep/organ space) and time of infection, and tested using area under the receiver operating characteristic curve (AUC-ROC). Results. Data for 113 patients with SSIs was available. Of these 62 (54.8%) had superficial and 51 had (45.2%) deep/organ space infections. Compared with other ML algorithms, the XG boost univariate model had highest AUC-ROC (.84) for prediction of type of SSI and Stochastic gradient boosting univariate, logistic regression univariate, XG boost univariate, and random forest classification univariate model had the highest AUC-ROC (.74) for prediction of week of infection. Conclusions. ML models offer reasonable accuracy in prediction of superficial vs deep SSI and time of developing infection. Follow-up duration and allocation of treatment strategies can be informed by ML predictions.

Knee Arthrodesis: An Analysis of Surgical Risk Factors and Complications Using a National Database.

Knee arthrodesis is predominantly a salvage procedure. In present time, knee arthrodesis is mostly considered for cases of unreconstructable failed total knee arthroplasty after prosthetic joint infection or trauma. Knee arthrodesis has shown better functional outcomes than amputation for these patients but has a high complication rate. The purpose of this study was to characterize the acute surgical risk profile of patients undergoing a knee arthrodesis for any indication. The American College of Surgeons National Surgical Quality Improvement Program database was queried to determine 30-day outcomes after knee arthrodesis between 2005 and 2020. Demographics, clinical risk factors, and postoperative events were analyzed, along with reoperation and readmission rates. A total of 203 patients that underwent a knee arthrodesis were identified. Forty-eight percent of patients had at least 1 complication. The most common complication was acute surgical blood loss anemia requiring a blood transfusion (38.4%), followed by organ space surgical site infection (4.9%), superficial surgical site infection (2.5%), and deep vein thrombosis (2.5%). Smoking was associated with higher rates of reoperation and readmission (odds ratio 9, P < .01, and odds ratio 6, P < .05). Overall, knee arthrodesis is a salvage procedure that has a high rate of early postoperative complications and is most often performed in patients at higher risk. Early reoperation is strongly associated with a poor preoperative functional status. Smoking places patients at higher risk of early complications.

MP60-05 INFECTIOUS COMPLICATION AFTER RADICAL CYSTECTOMY: TIMING AND OUTCOMES

You have accessJournal of UrologyCME1 Apr 2023MP60-05 INFECTIOUS COMPLICATION AFTER RADICAL CYSTECTOMY: TIMING AND OUTCOMES Young Son, Mark Quiring, Benjamin Fink, Virgil Demario, Scott Serpico, Thomas Mueller, and Gordon Brown Young SonYoung Son More articles by this author , Mark QuiringMark Quiring More articles by this author , Benjamin FinkBenjamin Fink More articles by this author , Virgil DemarioVirgil Demario More articles by this author , Scott SerpicoScott Serpico More articles by this author , Thomas MuellerThomas Mueller More articles by this author , and Gordon BrownGordon Brown More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000003318.05AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Radical cystectomy (RC) with urinary diversion is the primary treatment option for muscle invasive bladder cancer (MIBC) and select patients for non-muscle invasive bladder cancer (NMIBC). Surgical and non-surgical Infection after RC is a devastating complication. Postoperative infection has been shown to increase admission to ICU, increase length of hospital stay, increased readmission and double the mortality rate. We aim to add to the literature of the characteristics, timing, and predilection of infection after RC. METHODS: The ACS NSQIP is a health insurance portability and accountability act (HIPAA) compliant data file containing patient cases from 706 participating hospital institutions. This retrospective study focused on radical cystectomy cases in the NSQIP data set for bladder cancer. Patients with missing data or had multiple infections were excluded. The patients were then subgrouped to surgical site infection (SSI), wound disruption, UTI, and sepsis (sepsis and septic shock). RESULTS: Among the 3955 patients, the rate of SSI, UTI, wound disruption, sepsis/septic shock was 11.9%, 8.1%, 2.1%, and 10.0% (Table). The average days from operation until infectious complications were 15.1 days for organ space SSI, 14.57 days for deep SSI, 14.2 days for superficial SSI, 14.9 days for UTI, 12.2 days for wound disruption, and 13.8 days for sepsis (figure). Multivariable analysis for all infections identified diabetes as an independent variable associated with SSI (p=0.003), UTI (p=0.039), and sepsis/septic shock (p<0.001). Prior pelvic radiation was associated with SSI (p=0.001) and sepsis/septic shock (p=0.012). Furthermore, all infectious etiologies were associated with readmission on multivariable regression. CONCLUSIONS: Infection after radical cystectomy can be an often a serious complication. We identified that the timing of wound disruption to occur earliest while organ space SSI was identified late. Diabetes was associated with all the infectious complications while prior radiation was associated with SSI and sepsis. Source of Funding: n/a © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 209Issue Supplement 4April 2023Page: e844 Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.MetricsAuthor Information Young Son More articles by this author Mark Quiring More articles by this author Benjamin Fink More articles by this author Virgil Demario More articles by this author Scott Serpico More articles by this author Thomas Mueller More articles by this author Gordon Brown More articles by this author Expand All Advertisement PDF downloadLoading ...