Methods to reduce postoperative surgical site infections after head and neck oncology surgery

Surgical and procedural antibiotic prophylaxis in the surgical ICU: an American Association for the Surgery of Trauma Critical Care Committee clinical consensus document

The use of prophylactic measures, including perioperative antibiotics, for the prevention of surgical site infections is a standard of care across surgical specialties. Unfortunately, the routine guidelines used for routine procedures do not always account for many of the factors encountered with urgent/emergent operations and critically ill or high-risk patients. This clinical consensus document created by the American Association for the Surgery of Trauma Critical Care Committee is one of a three-part series and reviews surgical and procedural antibiotic prophylaxis in the surgical intensive care unit. The purpose of this clinical consensus document is to provide practical recommendations, based on expert opinion, to assist intensive care providers with decision-making for surgical prophylaxis. We specifically evaluate the current state of periprocedural antibiotic management of external ventricular drains, orthopedic operations (closed and open fractures, silver dressings, local, antimicrobial adjuncts, spine surgery, subfascial drains), abdominal operations (bowel injury and open abdomen), and bedside procedures (thoracostomy tube, gastrostomy tube, tracheostomy).

Reconstructive flap surgery in head and neck cancer patients: an interdisciplinary view of the challenges encountered by radiation oncologists in postoperative radiotherapy

Background

Major advances have been made in reconstructive surgery in the last decades to reduce morbidity in head and neck cancer. Flaps are now present in 80% of patients with oral cavity cancer to cover anatomic, functional, and cosmetic needs. However, gaps in interdisciplinary innovation transfer from surgery to postoperative radiotherapy (poRT) remain challenging. We aimed to provide an interdisciplinary view of the challenges encountered by radiation oncologists in planning head and neck postoperative radiotherapy.

Methods

A systematic and critical review was conducted to address areas of optimization in surgery and radiology that may be relevant to poRT.

Results

Despite extensive surgical literature on flap techniques and salvage surgery, 13 retrospective series were identified, where flap outcomes were indirectly compared between surgery alone or poRT. These low-evidence studies suggest that radiotherapy accelerates flap atrophy, fibrosis, and osteoradionecrosis and deteriorates functional outcomes. Preliminary evidence suggests that tumor spread occurs at the flap-tissue junction rather than in the flaps. One prospective 15-patient study showed 31.3% vs. 39.2% flap volume reduction without or with poRT. In an international consensus, experts recognized the needs for optimized flap-sparing poRT against flap-related functional deterioration and bone damage. CT, MRI, and PET-CT modalities show potential for the delineation of the junction area between native tissues and flap for flap segmentation and to characterize flap-specific changes quantitatively and correlate them with patterns of relapse or complications.

Conclusion

Flap management in poRT is insufficiently documented, but poRT seems to damage flaps. Current gaps in knowledge underscore the need for prospective flap assessment and interdisciplinary trials investigating flap morbidity minimization by flap-sparing poRT planning.

Rate and Causes of 30-day Unplanned Readmission/Return Following Head and Neck Surgery at a Tertiary Care Center in Saudi Arabia

Background

Identifying and targeting common preventable causes of 30-day hospital readmissions could help improve survival rates and reduce the healthcare burden.

Objective

To determine the rate and causes of unplanned hospital return/readmission to the Outpatient Department (OPD) or Emergency Department (ED) within 30 days after discharge following head and neck surgery (HNS) at a tertiary hospital in Western Saudi Arabia.

Methods

This retrospective study included all adult patients (aged ≥18 years) who had undergone HNS at King Abdulaziz University Hospital, Jeddah, Saudi Arabia, between January 2015 and December 2022 and returned to the OPD or ED within 30 days of being discharged.

Results

Of 1041 patients who had undergone HNS, 84 (8.1%) returned to the hospital within 30 days after discharge: 63 (6.1%) to the OPD and 21 (2.0%) to the ED. A total of 9 (0.9%) patients were readmitted as inpatients, most commonly for infections (33.3%) and neurological symptoms, including weakness and seizures (22.2%). For OPD visits, common causes were wound swelling (25.4%) and neurological symptoms (17.5%). For ED returns, frequent causes were neurological symptoms (23.8%) and surgical site bleeding (19.1%). Readmission was associated with intensive care unit (ICU) admission during the primary hospital stay (P = 0.003) and higher preoperative baseline health burdens when examined using the American Society of Anesthesiology score (P = 0.022), the Cumulative Illness Rating Scale (P = 0.007), and the Charlson Comorbidity Index (CCI) (P = 0.006).

Conclusion

The rate of 30-day unplanned hospital return following head and neck surgery was 6.1% and 2.0% through the OPD and the ED, respectively; 0.9% were readmitted as inpatients. Common causes of return included wound swelling, infections, bleeding, and neurological symptoms.

Enhanced recovery after surgery (ERAS) protocol improves patient outcomes in free flap surgery for head and neck cancer

BACKGROUND

In recent years, enhanced recovery after surgery (ERAS) guidelines have been developed to optimize pre-, intra-, and postoperative care of surgical oncology patients. The aim of this study was to compare management outcome of patients undergoing head and neck cancer (HNC) surgery with free flap reconstruction at our institution before and after the implementation of the ERAS guidelines.

METHODS

This retrospective study comprised 283 patients undergoing HNC surgery with free flap reconstruction between 2013 and 2020. Patients operated before and after the implementation of the ERAS protocol in October 2017 formed the pre-ERAS group (n = 169), and ERAS group (n = 114), respectively.

RESULTS

In the pre-ERAS group the mean length of stay (LOS) and intensive care unit length of the stay (ICU-LOS) were 20 days (range 7-79) and 6 days (range 1-32), and in the ERAS group 13 days (range 3-70) and 5 days (range 1-24), respectively. Both LOS (p < 0.001) and ICU-LOS (p = 0.042) were significantly reduced in the ERAS group compared to the pre-ERAS group. There were significantly fewer medical complications in the ERAS group (p < 0.003). No difference was found between the study groups in the surgical complication rate or in the 30-day or 6-month mortality rate after surgery.

CONCLUSIONS

We found reduced LOS, ICU-LOS, and medical complication rate, but no effect on the surgical complication rate after implementation of the ERAS guidelines, which supports their use in major HNC surgery.

Prediction models of surgical site infection after gastrointestinal surgery: a nationwide prospective cohort study

OBJECTIVE

This study aimed to construct and validate a clinical prediction model for surgical site infection (SSI) risk 30 days after gastrointestinal surgery.

MATERIALS AND METHODS

This multicentre study involving 57 units conducted a 30-day postoperative follow-up of 17 353 patients who underwent gastrointestinal surgery at the unit from 1 March 2021 to 28 February 2022. The authors collected a series of hospitalisation data, including demographic data, preoperative preparation, intraoperative procedures and postoperative care. The main outcome variable was SSI, defined according to the Centres for Disease Control and Prevention guidelines. This study used the least absolute shrinkage and selection operator (LASSO) algorithm to screen predictive variables and construct a prediction model. The receiver operating characteristic curve, calibration and clinical decision curves were used to evaluate the prediction performance of the prediction model.

RESULTS

Overall, 17 353 patients were included in this study, and the incidence of SSI was 1.6%. The univariate analysis combined with LASSO analysis showed that 20 variables, namely, chronic liver disease, chronic kidney disease, steroid use, smoking history, C-reactive protein, blood urea nitrogen, creatinine, albumin, blood glucose, bowel preparation, surgical antibiotic prophylaxis, appendix surgery, colon surgery, approach, incision type, colostomy/ileostomy at the start of the surgery, colostomy/ileostomy at the end of the surgery, length of incision, surgical duration and blood loss were identified as predictors of SSI occurrence ( P <0.05). The area under the curve values of the model in the train and test groups were 0.7778 and 0.7868, respectively. The calibration curve and Hosmer-Lemeshow test results demonstrated that the model-predicted and actual risks were in good agreement, and the model forecast accuracy was high.

CONCLUSIONS

The risk assessment system constructed in this study has good differentiation, calibration and clinical benefits and can be used as a reference tool for predicting SSI risk in patients.

Postoperative infections associated with microvascular free flaps in head and neck reconstruction: Analysis of risk factors and results with a standardized prophylaxis protocol

Currently, large defects of the head and neck regions are mainly reconstructed using microvascular free flap. Postoperative infections, including surgical site infections (SSIs) and medical postoperative infections (MPI), are important causes of morbidity and worsening of surgical outcomes. The authors aimed to analyze the results obtained using a standardized prophylaxis protocol in a series of 100 consecutive patients who underwent microvascular reconstruction surgery between 2016 and 2021 at a single institution, to identify the risk factors, which could be overcome, to minimize the incidence of infectious complications. In this study, 24 patients developed infectious complications. Higher American Society of Anesthesiologists (ASA) score was statistically associated with higher risk of infectious complications (p = 0.01), need for postoperative transfusions (p = 0.01), and higher T and N stage (p = 0.03 and p = 0.02, respectively) in patients with cancer. We also found a correlation between the increase in surgery duration, hospitalization, and intensive care unit (ICU) stay with higher risk of infection (p = 0.03, p = 0.01, and p = 0.001, respectively). Nine patients reported partial or total flap necrosis and in this group of patients, a higher incidence of infectious complication was recorded (p = 0.001). Our experience shows that SSIs and MPIs affect the global and surgical outcomes of patients and both their incidences can be reduced by correcting potential risk factors preoperatively (e.g., anemia), intraoperatively (amount of blood loss and duration of surgery), and postoperatively (duration of hospitalization and ICU stay and early elimination of potential sources of infection).

Incidence and risk factors of surgical site infection in patients with head and neck cancer: A meta-analysis

We systematically review the incidence and risk factors of surgical site infection (SSI) in patients with head and neck cancer. PubMed, Embase, Cochrane Library, and Web of Science databases were searched to obtain studies on the risk factors for SSI in patients with HNC. The retrieval time was from the establishment of the database to February 2023. Two reviewers independently screened the literature, extracted data, and assessed the risk of bias in included studies. Meta-analysis was performed by using Stata 15.1 software. A total of 32 articles including 128 919 patients with head and neck cancer and 2949 cases of SSI were included in this meta-analysis. The incidence rate of SSI in head and neck cancer ranges from 19% to 29%, and the overall infection rate was 24%. Meta-analysis indicated that BMI < 20 kg/m2 (OR, 2.64; 95% CI, 1.74-4.00; I2 , 0%), diabetes (OR, 3.00; 95% CI, 2.12-4.16; I2 , 60.6%), ASA score (OR, 1.51; 95% CI, 1.29-1.77; I2 , 0%), radiotherapy (OR, 2.27; 95% CI, 1.87-2.77; I2 , 44.8%), chemotherapy (OR, 2.36; 95% CI, 1.64-3.40; I2 , 0%), clindamycin antibiotic (OR, 2.99; 95% CI, 1.82-2.93; I2 , 36.5%), deficit repair (OR, 3.76; 95% CI, 1.22-11.59; I2 , 91.4%), neck dissection (OR, 2.13; 95% CI, 1.63-2.79; I2 , 16.4%), blood transfusion (OR, 2.29; 95% CI, 1.52-3.45; I2 , 66.2%), mandibular (OR, 3.17; 95% CI, 1.85-5.42; I2 , 73%), tracheostomy (OR, 2.51; 95% CI, 1.74-3.62; I2 , 86.4%), operation time (OR, 1.42; 95% CI, 1.16-1.74; I2 , 86.4%), ALB (OR, 2.48; 95% CI, 1.95-3.15; I2 , 5.3%) were risk factors of surgical site infection in patients with head and neck cancer (p < 0.05). The results of the sensitivity analysis showed good agreement in all risk factors and the results had stability. The present meta-analysis suggests that BMI < 20 kg/m2 , diabetes, ASA score, radiotherapy, chemotherapy, clindamycin antibiotic, deficit repair, neck dissection, blood transfusion, mandibular, tracheostomy, operation time, and ALB were significant risk factors for SSI.

Impact of surgical site infection on unplanned hospital readmissions, initiation of adjuvant treatment following surgery, and disease-free survival on patients with upper aerodigestive tract squamous cell carcinoma

INTRODUCTION

Unplanned hospital readmission (UHR) is an important indicator of the quality of the healthcare system in place. It has various implications for the patients and the healthcare system at large. In this article, we have attempted to understand the various factors influencing UHR and the start of adjuvant treatment following cancer surgery.

PATIENTS & METHODS

In this study adult patients above 18 years of age with upper aerodigestive tract squamous cell carcinoma who underwent surgery at our center between July 2019 to December 2019 were included in the study. Various factors influencing UHR and delay in receiving adjuvant treatment were analyzed.

RESULTS

A total of 245 patients satisfied the inclusion criteria. Surgical site infection (SSI) was the factor that had the maximum influence on the UHR (p < 0.002, OR: 5.6, 95% CI: [1.911-16.4]) and delaying the start of adjuvant treatment (p = 0.008, OR: 3.786, 95% CI: [1.421-10.086]) on multivariate analysis. Surgery lasting for >4 h and patients who had received prior treatment tended to develop SSI postoperatively. The presence of SSI also seemed to have had a negative influence on disease-free survival (DFS) as well.

CONCLUSIONS

SSI is an important postoperative complication having major implications in terms of increased UHR and delays in starting adjuvant treatment which in turn is reflected as a poorer DFS among patients who develop SSI postoperatively.

Antibiotic Use in Patients Undergoing Complex Clean-Contaminated Head and Neck Surgery: A Prospective Study

Aims and Objectives

Oncological surgery of the upper aerodigestive tract is a complex procedure and often includes neck dissection and flap reconstruction. It can be complicated by severe surgical site infection (SSI) leading to flap necrosis, delayed wound healing, and increasing mortality and morbidity. The purpose of this study is to perform a systematic descriptive analysis and to evaluate the effect of our adapted antibiotic regimen strategy on postoperative outcomes.

Materials and Methods

A prospective cohort analysis of 47 patients undergoing major clean-contaminated head and neck surgery was conducted at the Cervicomaxillofacial Surgery Department (Saint-Pierre Hospital), between 2019 and 2022. The patients were divided into two groups: group I, which received a short-term postoperative antibiotic regimen for 24 h, and group II, which received a more extended postoperative antibiotic course for more than 24 h. Antibioprophylaxy amoxicillin and clavulanate were administered intravenously 30-60 min before making the incision. The antibiotic regimen was continued after surgery. The prognostic significance of the antibiotic regimen on postoperative outcomes, including clinical signs of infection and biological markers such as white blood cells count, and C-reactive protein levels was evaluated using univariate analysis.

Results

Eighteen patients developed SSIs. All of these infections were grade 2 and were treated with antibiotics. After univariate analysis, only a history of hypothyroidism seems to be a predictor of SSI (P = 0.038). No significant difference was found in terms of onset and hospital stay when we compared the patients who received antibiotics for 24 h or more. Moreover, the rate of multidrug-resistant bacteria was not different in both groups.

Conclusions

Our results suggest that postoperative antibiotics for more than 24 h do not confer benefit in terms of SSI. Oncological patients undergoing complex clean-contaminated head and neck surgery are often suffering from infectious complications and, despite the absence of guidelines, practicians should consider these findings in their decision-making.

Operationalizing a Free Flap Program for Head and Neck Reconstruction at a Veterans Affairs Hospital

Objectives

We aimed to operationalize a head and neck microvascular free tissue transfer (MVFTT) program at a Veterans Affairs (VA) hospital with the emphasis on initiating radiotherapy within 6 weeks of surgery for cancer patients and minimizing readmissions.

Study Design

Case series.

Setting

Tertiary care VA hospital.

Methods

A retrospective analysis was performed on consecutive head and neck MVFTT patients from May 1, 2017 and April 30, 2022. Demographics, patient and disease characteristics, per-operative data and postoperative outcomes were recorded from the electronic medical record. We sought to compare our rate of 30-day readmissions with those published in the literature.

Results

One hundred and forty-one procedures were performed in the queried timeframe. Eighty-four percent (119) were performed after oncologic resections and 16% (22) were for nononcologic procedures. The rate of total flap loss was <1% and the rate of partial flap loss was 3.5%. For mucosal defects, the fistula rate was 2.3%. The rate of return to the OR for any reason within 30 days was 7.8%. The 30-day readmission rate was 6.4% while the rates reported in the literature range from 13% to 20%. One hundred and four patients required postoperative radiotherapy (PORT) and 76% started PORT within 42 days of surgery.

Conclusion

Operationalizing a head and neck MVFTT program with a VA hospital is safe and allows for the successful delivery of multimodality treatment to cancer patients. These resources can be expanded for the care of head and neck cancer treatment sequelae, such as osteoradionecrosis, and other nononcologic patient needs.

Antibiotics in Dentistry: A Narrative Review of the Evidence beyond the Myth

Antibiotics have undoubtedly revolutionized medicine and the health and survival of patients with life-threatening infections, being nonetheless free from potential adverse effects, and the risk of intestinal dysbiosis, antimicrobial resistance, and the resulting consequences for the patient's health and the public purse. The present study narratively reviewed the epidemiological data on worldwide antibiotic consumption and administration in dental practice, patients' adherence to prescriptions, the antimicrobial resistance phenomenon in dentistry, and the evidence supporting and recommending appropriate antibiotic use in dental care. Eligible systematic reviews and original studies in humans published in the English language from January 2000 to 26 January 2023 were considered. A total of 78 studies, 47 on the epidemiology of antibiotic use and prescription in dentistry, 6 on antibiotic therapy in dentistry, 12 on antibiotic prophylaxis in dentistry, 0 on adherence of dental patients to antibiotic prescription, and 13 on antimicrobial resistance in dentistry, were presently considered. Retrieved evidence revealed that antibiotics are frequently overused and misused in dental practice, dental patients frequently do not adhere to prescriptions, and antimicrobial resistance in dentistry is a still rising phenomenon also secondary to improper oral antiseptics use. The present findings highlighted the need to establish more evidence-based and accurate antibiotic prescriptions to sensitize dentists and dental patients to minimize and rationalize the use of antibiotics only when it is indicated and necessary, improve patients' adherence, and enhance knowledge and awareness of the antimicrobial resistance in dentistry.

Antibiotic prophylaxis in clean and clean-contaminated plastic surgery: A critical review

Antibiotic prophylaxis is frequently used in plastic surgery procedures, despite the generally low rates of infection and few guidelines on the practice. The increasing prevalence of bacterial resistance to antibiotics calls for a reduction in unnecessary antibiotic use. The aim of this review was to create an updated summary of the available data on the effectiveness of antibiotic prophylaxis in reducing the postoperative infection in clean and clean-contaminated plastic surgery. A systematic literature search was performed on the databases Medline, Web of Science, and Scopus, limited to articles published January 2000 onward. Randomized controlled trials (RCTs) were included in the primary review, whereas older RCTs and other studies were sought if 2 or fewer relevant RCTs were identified. Overall, 28 relevant RCTs, 2 nonrandomized trials, and 15 cohort studies were identified. Although the number of studies for each type of surgery is limited, the data suggest that prophylactic systemic antibiotic may be unnecessary in noncontaminated facial plastic surgery, reduction mammaplasty, and breast augmentation. In addition, no benefit is apparent from extending the antibiotic prophylaxis over 24 h in rhinoplasty, aerodigestive tract reconstruction, and breast reconstruction. No studies assessing the necessity of antibiotic prophylaxis in abdominoplasty, lipotransfer, soft tissue tumor surgery, or gender affirmation surgery were identified. In conclusion, limited data are available on the effectiveness of antibiotic prophylaxis in clean and clean-contaminated plastic surgery. More studies on this topic are needed before strong recommendations can be made on the use of antibiotics in this setting.

The Incidence and the Risk Factors for Pharyngocutaneous Fistula following Primary and Salvage Total Laryngectomy

The pharyngocutaneous fistula (PCF) is the most common complication following a total laryngectomy (TL) with a wide range of incidence and various potential risk factors. The aim was to analyse the incidence and potential risk factors for PCF formation in a large study set collected over a longer period of time. In the retrospective study at the Department of Otorhinolaryngology and Cervicofacial Surgery of Ljubljana, 422 patients who were treated for head and neck cancer by TL between 2007 and 2020 were included. The comprehensive clinicopathologic data were collected including potential risk factors related to the patient, disease, surgical treatment and post-operative period for the development of fistulae. The patients were categorized into a group with the fistula (a study group) and one without it (a control group). The PCF then developed in 23.9% of patients. The incidence following a primary TL was 20.8% and 32.7% following salvage TL (p = 0.012). The results demonstrated that surgical wound infection, piriform sinus invasion, salvage TL, and total radiation dose were determined as independent risk factors for PCF formation. A diminishing surgical wound infection rate would contribute to a further reduction of the PCF rate.

Predictors of surgical site infection following reconstructive flap surgery: A multi-institutional analysis of 37,177 patients

Purpose

Rates of surgical site infection (SSI) following reconstructive flap surgeries (RFS) vary according to flap recipient site, potentially leading to flap failure. This is the largest study to determine predictors of SSI following RFS across recipient sites.

Methods

The National Surgical Quality Improvement Program database was queried for patients undergoing any flap procedure from years 2005 to 2020. RFS involving grafts, skin flaps, or flaps with unknown recipient site were excluded. Patients were stratified according to recipient site: breast, trunk, head and neck (H&N), upper and lower extremities (UE&LE). The primary outcome was the incidence of SSI within 30 days following surgery. Descriptive statistics were calculated. Bivariate analysis and multivariate logistic regression were performed to determine predictors of SSI following RFS.

Results

37,177 patients underwent RFS, of whom 7.5% (n = 2,776) developed SSI. A significantly greater proportion of patients who underwent LE (n = 318, 10.7%) and trunk (n = 1,091, 10.4%) reconstruction developed SSI compared to those who underwent breast (n = 1,201, 6.3%), UE (n = 32, 4.4%), and H&N (n = 100, 4.2%) reconstruction (p < .001). Longer operating times were significant predictors of SSI following RFS across all sites. The strongest predictors of SSI were presence of open wound following trunk and H&N reconstruction [adjusted odds ratio (aOR) 95% confidence interval (CI) 1.82 (1.57-2.11) and 1.75 (1.57-1.95)], disseminated cancer following LE reconstruction [aOR (CI) 3.58 (2.324-5.53)], and history of cardiovascular accident or stroke following breast reconstruction [aOR (CI) 16.97 (2.72-105.82)].

Conclusion

Longer operating time was a significant predictor of SSI regardless of reconstruction site. Reducing operating times through proper surgical planning might help mitigate the risk of SSI following RFS. Our findings should be used to guide patient selection, counseling, and surgical planning prior to RFS.

Factors predicting pharyngocutaneous fistula in patients after salvage laryngectomy for laryngeal malignancy - A multicenter collaborative cohort study

OBJECTIVES

Pharyngocutaneous fistula (PCF) is a major morbidity of salvage total laryngectomy (TL). Understanding the factors predicting PCF is fundamental to managing laryngeal cancer. We aim to assess factors associated with PCF following salvage TL in a multicenter, international retrospective cohort study of academic centers in the US and Canada.

RESULTS

In total, 550 patients post-salvage TL were identified (mean [SD; range] age, 64 [10.4; 32-90] years; 465 [85 %] male and 84 [15 %] female) between 2000 and 2014. Rate of PCF was 23 % (n = 127) with median time to PCF of 2.9 weeks. Surgical management of PCF was required in 43 % (n = 54) while 57 % (n = 73) required wound care alone. Rates of PCF differed by primary treatment modality [radiation, 20 % (n = 76); chemoradiation, 27 % (n = 40); not available (n = 6)] and use of vascularized tissue in pharyngeal closure [free/regional flap, 18 % (n = 25); no vascularized tissue/primary closure, 24 % (n = 98); not available (n = 4)]. There was no statistically significant association between PCF and treatment with chemoradiation (HR, 1.32; 95 % CI, 0.91-1.93, p = 0.14) or lack of vascularized tissue reconstruction (HR, 1.41, 95 % CI 0.91-2.18, p = 0.12). Significant association between PCF and advanced stage (T3 or T4), positive margin, close margin (<5mm), lymphovascular invasion and pre-operative tracheostomy were identified on univariable analysis. Positive surgical margin (HR, 1.91; 95 % CI, 1.11 to 3.29) was the only significant association on multivariable analysis.

CONCLUSION

We highlight positive surgical margin as the only variable significantly associated with increased risk of PCF following salvage TL on multivariable analysis in a large cohort across several major head and neck oncology centers.

Surgical side infections of the tracheostomy - A retrospective cohort study of patients with head and neck cancer in intensive care

This study was conducted to reveal the relevant risk factors for surgical site infections (SSI) of the tracheostomy in ICU tracheostomy patients with oncologic history. Retrospectively, medical and ICU records of patients who received open tracheostomy in a uniform manner were investigated. Of 187 consecutive patients in total, patients with a peri/post-operative antibiotic prophylaxis (POABP) experienced significantly more Organ-Space SSI, whereas patients with a POABP developed less Superficial Incisional SSI and Deep Incisional SSI. Neck Dissection (p = 0.025), especially the more levels are included, and POABP (p = 0.005) have a significant impact on the occurrence of an SSI of the tracheostomy. Deep incisional SSI significantly prolonged a patient's dependency on a ventilator (p = 0.045, M = 3.92, SD = 4.718). The difference between Superficial Incisional, Deep Incisional and Organ-Space SSI should be taken in consideration regarding risk evaluation and treatment. Furthermore, a gram-negative facultative anaerobic biofilm should be taken into consideration in treatment options and thus an escalation regarding antibiotic treatment as a POABP. For fulminant SSI of the tracheostomy the use of piperacillin/tazobactam or 3rd generation cephalosporines or carbapenems is recommendable.

Timing of Oral Feeding in Patients Who have Undergone Free Flap Reconstruction for Oral Cancer

OBJECTIVE

Determine the safety and effectiveness of a nasogastric tube removal plan designed to shorten nasogastric tube indwelling time after oral cancer surgery plus free flap reconstruction.

MATERIALS AND METHODS

A parallel randomized clinical trial was conducted from May 2021 to December 2021 at Peking University School of Stomatology. Volunteers (n = 128) were separated into four groups: non-tracheostomy control and intervention groups and tracheostomy control and intervention groups. Control patients received the conventional nasogastric tube removal plan. Non-tracheotomy intervention patients were asked to swallow 5 ml of water on the first postoperative day. If there was no coughing, they were allowed progressively increasing amounts of water for the following 2 days. The nasogastric tube was removed only after ensuring level I/II performance on the Watian water swallowing test, no "wet voice" after drinking water, no marked decrease in blood oxygen saturation after drinking, and satisfactory daily oral nutritional intake. Tracheotomy intervention patients received the same protocol plus an additional Watian water swallowing test after tracheal tube removal.

RESULTS

Nasogastric tube removal time was earlier in the intervention subgroups than in control subgroups: 5.0 ± 2.3 days versus 7.8 ± 3.9 days (p = 0.001) in non-tracheostomy patients and 9.8 ± 1.1 days versus 16.2 ± 13.0 days (p = 0.049) in tracheostomy patients. Incidence of wound complications and daily food intake were comparable between the groups. The incidence of pneumonia was lower in the tracheostomy intervention group than in the tracheostomy control group (12.5% vs. 3.1%, p = 0.162). Pharyngeal pain score was lower in tracheotomy intervention patients than in tracheotomy control patients (p = 0.029). Postoperative hospital stay was shorter in tracheotomy intervention patients than in tracheotomy control patients (p = 0.005).

CONCLUSIONS

On the basis of ensuring safety and effectiveness, patients undergone free flap reconstruction for oral cancer could be offered oral intake early after surgery, which will not increase the incidence of wound complications and pneumonia or adversely affecting the oral intake of the patients; it can also help minimize pharyngeal pain and shorten postoperative hospital stay of patients with a tracheotomy.

LEVEL OF EVIDENCE

II Laryngoscope, 2022.

Nature-Derived Okra Gel as Strong Hemostatic Bioadhesive in Human Blood, Liver, and Heart Trauma of Rabbits and Dogs

Bioadhesive performance can be compromised due to bleeding. Bleeding increases mortality. Adhesives with hemostatic function are of great significance. A sustainable and robust hemostatic bioadhesive from okra is reported. The adhesive strength reaches around three and six-fold higher than commercial fibrin on pigskin and glass, respectively. The okra gel presents high-pressure resistance and great underwater adhesive strength. In human blood experiments, the okra gel can activate platelets, enhance the adhesion of activated platelets, and release coagulation factors XI and XII. By forming a fast gel layer and closely adhering to the wound, it can quickly stop bleeding in the liver and heart of rabbits and dogs. Meanwhile, okra gel can cause platelet activation at the wound site and further strengthen its hemostatic performance. It is biocompatible, biodegradable, and can promote wound healing and shows potential as a sustainable bioadhesive, especially in the scenario of significant hemorrhage.

Osteocutaneous-flap-related osteomyelitis following mandibular reconstruction: a cohort study of an emerging and complex bone infection

Abstract. Osteocutaneous flap (OCF) mandible reconstruction is at high risk for surgical site infection. This study aimed to describe diagnosis, management, and outcome of OCF-related osteomyelitis. All patients managed at our institution for an OCF-related osteomyelitis following mandible reconstruction were included in a retrospective cohort study (2012–2019). Microbiology was described according to gold-standard surgical samples, considering all virulent pathogens, and potential contaminants if present on at least two samples. Determinants of treatment failure were assessed by logistic regression and Kaplan–Meier curve analysis. The 48 included patients (median age 60.5 (IQR, 52.4–66.6) years) benefited from OCF mandible reconstruction mostly for carcinoma (n=27/48; 56.3 %) or osteoradionecrosis (n=12/48; 25.0 %). OCF-related osteomyelitis was mostly early (≤3 months post-surgery; n=43/48; 89.6 %), presenting with local inflammation (n=28/47; 59.6 %), nonunion (wound dehiscence) or sinus tract (n=28/47; 59.6 %), and/or bone or device exposure (n=21/47; 44.7 %). Main implicated pathogens were Enterobacteriaceae (n=25/41; 61.0 %), streptococci (n=22/41; 53.7 %), Staphylococcus aureus (n=10/41; 24.4 %), enterococci (n=9/41; 22.0 %), non-fermenting Gram-negative bacilli (n=8/41; 19.5 %), and anaerobes (n=8/41; 19.5 %). Thirty-nine patients (81.3 %) benefited from surgery, consisting of debridement with implant retention (DAIR) in 25/39 (64.1 %) cases, associated with 93 (IQR, 64–128) days of antimicrobial therapy. After a follow-up of 18 (IQR, 11–31) months, 24/48 (50.0 %) treatment failures were observed. Determinants of treatment outcomes were DAIR (OR, 3.333; 95 % CI, 1.020–10.898) and an early infectious disease specialist referral (OR, 0.236 if ≤2 weeks; 95 % CI, 0.062–0.933). OCF-related osteomyelitis following mandibular reconstruction represents difficult-to-treat infections. Our results advocate for a multidisciplinary management, including an early infectious-disease-specialist referral to manage the antimicrobial therapy driven by complex microbiological documentation.

Surgical wound classification in otolaryngology: A state‐of‐the‐art review

Objective

To describe the issues related to the assignment of surgical wound classification as it pertains to Otolaryngology—Head & Neck surgery, and to present a simple framework by which providers can assign wound classification.

Data Sources

Literature review.

Conclusion

Surgical wound classification in its current state is limited in its utility. It has recently been disregarded by major risk assessment models, likely due to inaccurate and inconsistent reporting by providers and operative staff. However, if data accuracy is improved, this metric may be useful to inform the risk of surgical site infection. In an era of quality‐driven care and reimbursement, surgical wound classification may become an equally important indicator of quality.

In its current state, surgical wound classification has been disregarded as a key metric, likely due to habitual inaccuracies in procedure categorization.

A new paradigm for surgical wound classification specific to Otolaryngology—Head & Neck Surgery is presented.

The possibility of surgical wound classification serving as an important indicator of quality of care is discussed and contextualized in current health care trends.

Clindamycin use in head and neck surgery elevates the rate of infections in tracheostomies

Background

Surgical site infection (SSI) in open surgical tracheostomy (ST) occurs in up to 33% of the cases. SSI can be reduced by a postoperative antibiotic prophylaxis (POAP). The effect of Clindamycin on SSIs in head and neck surgery (HNS) is discussed controversially in the literature.

Methods

An 8 year single-center retrospective comparative analysis of 441 STs (Visor-ST and Bjoerk-flap technique) performed within major HNS was evaluated due to the event of a SSI within 7 days and analyzed descriptively. Logistic regression model evaluated the impact of POAP with Clindamycin on SSIs.

Results

The use of Clindamycin showed twice the rate of ST-SSI as all patients that did not receive Clindamycin, treated with other perioperative antibiotics. (Fisher’s p = 0.008) The logistic regression model could not prove a statistically significant impact. (OR = 2.91, p = 0.04).

Conclusion

We recommend that Clindamycin should be reconsidered as a POAP regimen in ST. Further studies should evaluate alternatives for Penicillin-allergic patients.

Level of evidence III

Comparative retrospective monocentric study.

[Analysis of etiological characteristics and establishment of prediction model of postoperative infections in patients undergoing oral squamous cell carcinoma surgery with free flap reconstruction]

OBJECTIVE

To investigate the characteristics of pathogen infection and to establish a prediction model of infections in oral squamous cell carcinoma patients undergoing surgery with free flap reconstruction.

METHODS

The retrospective cohort study consisted of 1 596 patients undergoing tumor resection and free flap reconstruction for oral squamous cell carcinoma from January 2018 to December 2020. According to the postoperative infection, the patients were divided into the infected group (n=154) and non-infected group (n=1 442). The characteristics of pathogens were analyzed in the infected patients. The primary outcome variable was postoperative infection, and Logistic regression was used to determine risk factors of the infection. The prediction model was established and the discriminatory accuracy of the model was evaluated using receiver operating characteristic (ROC) curve.

RESULTS

Totally 154 cases were infected in the 1 596 cases undergoing surgery with free flap reconstruction, and the infection rate was 9.65%. The most frequent sites of infection were the surgical wound and respiratory tract. A total of 268 pathogens were isolated and cultured, including 240 strains of Gram-negative bacteria, accounting for 89.55%, mainly Pseudomonas aeruginosa and Klebsiella pneumoniae; 23 strains of Gram-positive bacteria, accounting for 8.58%, mainly Enterococcus faecalis and Staphylococcus aureus; and 5 strains of fungi, accounting for 1.87%. The isolated Pseudomonas aeruginosa had high resistant rate to imipenem and meropenem, and was sensitive to antibiotics, such as ciprofloxacin. The isolated Staphylococcus aureus had high resistant rate to erythromycin and clindamycin, and was sensitive to vancomycin. According to the multivariate Logistic analysis, four independent variables were significantly associated with an increased risk of postoperative infection (P < 0.05): clinical N category≥1, the American Society of Anesthesiologists (ASA) grade ≥2, tracheotomy and length of hospital stay >13 d. The prediction model was established based on these factors and the expression of the risk prediction model was as follows: predicted probability value P=1/(1+e^-a), a=-0.803+0.674×(clinical N category ≥1)+0.518×(the ASA grade ≥2)+0.918×(tracheotomy)+1.581×(length of hospital stay >13 d), Hosmer-Lemeshow χ²=10.647, P=0.223, the degree of fitting of the model was good. The area under the ROC curve was 0.818 and 95%CI of the model for predicting infection was 0.789-0.846.

CONCLUSION

Oral squamous cell carcinoma patients undergoing surgery with free flap reconstruction are prone to have a high incidence of postoperative infection and Gram-negative bacteria are the main pathogens causing an infection. The established prediction model is of good predictive effect. Rational antimicrobial use coupled with awareness of infection control measures is paramount to reduce the incidence of postoperative infection in the oral squamous cell carcinoma patients undergoing surgery with free flap reconstruction.

Preoperative nutritional evaluation, surgical site infection, and prognosis in patients with oral cancer

OBJECTIVES

The risk of postoperative infection after reconstructive oral cancer surgery is high and poses a problem in perioperative management. The objective of this study was to verify the association between preoperative nutritional indicators, surgical site infection (SSI), and long-term prognosis after reconstruction for oral cancer.

STUDY DESIGN

Sixty-seven patients admitted to a dental hospital were enrolled. The following nutritional indicators were examined: serum albumin level, modified Glasgow Prognostic Score, Miki's Glasgow Prognostic Score, prognostic nutritional index, platelet/lymphocyte ratio, neutrophil/lymphocyte ratio, lymphocyte/monocyte ratio, and the Controlling Nutritional Status tool. Statistical analyses were conducted to determine potential risk factors for SSI.

RESULTS

The Cox proportional hazards model demonstrated that SSI and platelet/lymphocyte ratio ≥211.4 were independent prognostic factors affecting survival. The results demonstrated that albumin <4.0 and platelet/lymphocyte ratio ≥211.4 were risk factors for SSI. Furthermore, albumin <4.0, platelet/lymphocyte ratio ≥211.4, and SSI were correlated with prognosis. Preoperative nutritional indicators were associated with SSI and prognosis in patients with oral cancer after reconstructive surgery.

CONCLUSION

Preoperative nutritional therapy is crucial for improving therapeutic outcomes in patients with oral cancer who require reconstructive surgery.

Antibiotic Prophylaxis Prescribing Practice in Head and Neck Tumor Resection and Free Flap Reconstruction

Background

Adherence to guidelines for antibiotic prophylaxis is often poor and is an important target for antimicrobial stewardship programs. Prescribing audits that suggested poor adherence to guidelines in a plastic surgery department led to a targeted education program to bring antibiotic prescriptions in line with hospital guidelines. We reviewed whether this intervention was associated with changed perioperative prescribing and altered surgical outcomes, including the rate of surgical site infections, specifically looking at clean-contaminated head and neck tumor resections with free flap reconstruction.

Methods

A retrospective cohort study was performed on 325 patients who underwent clean-contaminated head and neck tumor resection and free flap reconstruction from January 1, 2013, to February 19, 2019. Patients were divided into 2 groups, those before (pre-intervention) and after (postintervention) the education campaign. We analyzed patient demographic and disease characteristics, intraoperative and postoperative factors, and surgical outcomes.

Results

Patients pre-intervention were prescribed longer courses of prophylactic antibiotics (median [interquartile range], 9 [8] vs 1 [1]; P < .001), more topical chloramphenicol ointment (21.82% vs 0%; P < .001), and more oral nystatin (36.9% vs 12.2%; P < .001). Patients postintervention had higher rates of recipient infections (36.11% vs 17.06%; P < .001) and donor site infections (6.94% vs 1.19%; P = .006).

Conclusions

Following the education campaign, patients were prescribed shorter courses of prophylactic antibiotics, more of the recommended cefazolin-metronidazole regimen, and fewer topical antibiotics. However, patients also had a higher rate of surgical site infections.

Impact of the practical guideline on appropriate usage of antimicrobial treatments for surgical site infections in reconstructive surgery of head and neck cancer

OBJECTIVES

In 2016, Japanese Society of Chemotherapy and Japan Society for Surgical Infection presented the practical guideline for appropriate usage of antimicrobial agents to prevent postoperative infections. This study aims to exhibit the validity of the guideline as a series of effective strategies for prevention of surgical site infections (SSIs) during reconstructive surgery of the head and neck cancer.

METHODS

We retrospectively evaluated patients who underwent head and neck reconstructive surgery with free or pedicle flaps in a single institute in Japan between July 2010 and July 2020. We evaluated the incidence of SSIs, patient backgrounds, and microbiological characteristics on the basis of antimicrobial prophylaxis recommended by the guideline.

RESULTS

Enrolled in this study were 102 patients in our institution who underwent head and neck reconstructive surgery with free or pedicle flaps between July 2010 and July 2020. In the period between January 2018 to July 2020 after the SSI guideline was advocated (SSI guideline period), the ratio of administration of sulbactam/ampicillin (SBT/ABPC) was significantly higher (P < 0.001) and the duration of prophylactic antimicrobial treatment was significantly shorter than in the period between July 2010 to December 2017 before the SSI guideline was advocated (Pre-SSI guideline period) (P < 0.001). Incidence of SSIs were similar, even when antibiotic use was changed to be short-term single-agent administration in accordance with the practical guideline.

CONCLUSIONS

Adherence to the current Japanese practical guideline on appropriate antimicrobial prophylaxis for SSIs can shorten the duration of usage of antimicrobial treatment without increasing the risk for occurrence of SSIs.

Risk factors for surgical site infection in head and neck cancer

PURPOSE

Surgical site infection (SSI) frequently occurs in patients with head and neck cancer (HNC) after tumor resection and can lead to death in severe cases. Moreover, there is no definitive conclusion about the risk factors of SSI. Therefore, it is of great clinical significance to study the factors affecting the SSI.

METHODS

The HNC patients included in this study were all from the Department of Oral and Maxillofacial Surgery of the Second Xiangya Hospital of Central South University (CSU), and these patients received surgical treatment in the department from January 2018 to December 2019. The cross tabulation with chi-squared testing and multivariate regression analysis were applied to determine the risk factors of SSI. To identify the key risk factors of SSI, the caret package was used to construct three different machine learning models to investigate important features involving 26 SSI-related risk factors.

RESULTS

Participants were 632 HNC patients who underwent surgery in our department from January 2018 to December 2019. During the postoperative period, 82 patients suffered from SSI, and surgical site infection rate (SSIR) was about 12.97%. Multivariate logistic regression analysis shows that diabetes mellitus, primary tumor site (floor of mouth), preoperative radiotherapy, flap failure, and neck dissection (bilateral) are risk factors for SSI of HNC. Machine learning indicated that diabetes mellitus, primary tumor site (floor of mouth), and flap failure were consistently ranked the top three in the 26 SSI-related risk factors.

CONCLUSION

Diabetes mellitus, primary tumor site (floor of mouth), flap failure, preoperative radiotherapy, and neck dissection (bilateral) are risk factors for SSI of HNC.

Current Concepts in Prophylactic Antibiotics in Oral and Maxillofacial Surgery

Antibiotic prophylaxis is the use of antibiotics in the perioperative period to prevent surgical site infections from local flora. Specific guidelines and criteria exist to prevent these infections while also practicing antimicrobial stewardship. Most dentoalveolar procedures do not require antibiotic prophylaxis. For nondentoalveolar procedures, the decision to provide antibiotic prophylaxis is based on involvement of the respiratory, oral, or pharyngeal mucosa. Special considerations exist for patients at high risk for infective endocarditis, patients with head and neck cancer, and temporomandibular joint replacement procedures. This article discusses indications for antibiotic prophylaxis during oral and maxillofacial surgical procedures.

Surgical and remote site infections after reconstructive surgery of the head and neck: A risk factor analysis

The aim of this study was to identify risk factors for surgical (SSI) and remote site (RSI) infections, pathogens and antibiotic resistances in patients after pedicled and free flap reconstruction in the head and neck area. SSI criteria implicated infections affecting superficial or deep tissue in the flap area with purulent discharge, fistula, abscess formation and local infections signs. RSI criteria were defined as infections remote from the surgical site presenting with systemic symptoms like fever, leucocytosis, increase in C-reactive protein, purulent tracheobronchial secretion or deterioration of blood gases. Focus adequate specimen sampling and aerobic and anaerobic incubation and cultivation was performed. Epidemiological data, factors directly related to surgery or reconstruction, perioperative antibiotic regimen, length of stay, autologous blood transfusion and microbiological aspects were retrospectively analysed in 157 patients. 10.8% of patients presented SSI, 12.7% RSI. Cultivated bacteria were sampled from flap sites, blood cultures, central catheters and sputum including mainly gram-negative bacteria (70.3%) being frequently resistant against penicillin (85%) and third generation cephalosporine derivates (48%). Autologous blood transfusion (p = 0.018) and perioperative clindamycin use (p = 0.002) were independent risk factors for overall (SSI and RSI combined) infections. Prior radiation (p = 0.05), autologous blood transfusion (p = 0.034) and perioperative clindamycin use (p = 0.004) were predictors for SSIs. ASA >2 (p = 0.05) was a risk factor for remote site infections and prolonged ICU stay (p = 0.002) was associated with overall infections, especially in irradiated patients. Efforts need to be made in improving patient blood management, antibiotic stewardship and accurate postoperative care to avoid postoperative infections after head and neck reconstructive surgery.

Antibiotic prophylaxis in head and neck cancer surgery: Systematic review and Bayesian network meta-analysis

Postoperative surgical site infections (SSI) are worrisome complications after head and neck cancer surgery. Due to the lack of direct comparisons, it is difficult to indicate the best antibiotic in the setting of SSI prophylaxis for patients with head and neck cancer. For this reason, we decided to conduct a Bayesian network meta-analysis of clinical studies evaluating various antibiotic classes for SSI prophylaxis; thus, we directly and indirectly compared all the available antibiotics in the setting of head and neck oncological surgery. We performed a systematic review and a network meta-analysis according to the PRISMA-NMA checklist. Regarding inclusion criteria, we included articles with retrospective or prospective design recruiting adult participants with head and neck neoplasm of any subsite that compared different antibiotics or that compared different antibiotic treatment duration with sample sizes of more than 10 patients. Overall, 310 citations were identified by the search on all databases. Of these, 250 were excluded based on title and abstract, leaving 60 publications for full text examination. Finally, 20 papers were included for data extraction and analysis. In total, 8627 patients were evaluated across the included studies. Results of the Bayesian network meta-analysis showed that when compared to clindamycin short course, the antibiotics effective in preventing SSI were ampicillin/sulbactam or other penicillin short course (OR: 0.37, 95%CrI: 0.19-0.72), cefazolin/metronidazole short course (OR: 0.26, 95%CrI: 0.06-0.93), cefazolin (OR: 0.36, 95%CrI: 0.17-0.79), ampicillin/sulbactam long course (OR: 0.20, 95%CrI: 0.04-0.91), cefazolin/metronidazole long course (OR: 0.27, 95%CrI: 0.09-0.64), cefoperazone (OR: 0.05, 95%CrI: 0.002-0.89), cefotaxime (OR: 0.04, 95%CrI: 0.002-0.85). There was no significant difference between clindamycin and no antibiotic (OR: 2.3, 95%CrI: 0.59-9.9). Clindamycin plus aminoglycoside seemed to give a slight protection from SSI compared to clindamycin alone (OR: 0.30, 95%CrI: 0.09-0.99) or no antibiotic (OR: 0.13, 95%CrI: 0.02-067). Antibiotic prophylaxis is important in preventing SSI in head and neck cancer setting. Current evidence suggests that penicillins and cephalosporins are the best choice. Moreover, long duration course does not give any advantage compared to short course prophylaxis. Finally, it is important to implement appropriate antibiotic prophylaxis in patients that are labeled as penicillin allergic, in this regard clindamycin seems to be ineffective and, for this reason, further research is needed to provide a better care for this subset of patients.

An evaluation of the clinical utility of C-reactive protein and antibiotic use in patients undergoing major head and neck reconstructive surgery with outcome assessment

Purpose

This ambispective observational study aims to evaluate the local utility of peri-operative CRP testing and prophylactic antibiotics in relation to post-operative complications in patients who have undergone major head and neck oncological reconstructive surgery.

Results

A total of 79 patients were identified for inclusion; CRP testing was undertaken within the first 3 days postoperatively in 78/79 cases. Results demonstrated no benefit of extended prophylactic antibiotic use in reducing post-operative infection. Forty-two post-operative complications arose. In the prospective arm, CRP did not influence the decision to commence antibiotic therapy for any of the surgical site infections. Age, diabetes, smoking, or high body mass index (BMI) did not appear to affect the incidence of postoperative infection (p > 0.05). There is no evidence that more than 24 h of antibiotic prophylaxis is indicated for patients undergoing head and neck reconstructive surgery.

Conclusion

Everyone who is involved in peri-operative patient care should be educated regarding the appropriate use of CRP testing, with the implementation of protocols required to standardize CRP testing and prophylactic antibiotic prescription.

Preoperative Fasting Abbreviation With Whey Protein Reduces the Occurrence of Postoperative Complications in Patients With Head and Neck Cancer: A Randomized Clinical Trial

BACKGROUND

Surgery has become the treatment of choice for head and neck cancer (HNC) in most cases. Preoperative fasting abbreviation and nutrition screening have been suggested to reduce the occurrence of postoperative complications. This study aimed to evaluate the addition of whey protein in the preoperative fasting abbreviation and to analyze the association of nutrition status on postoperative complications in patients with HNC.

METHODS

A randomized, single-blind clinical trial was performed. Patients recruited from March to November 2018 at a national cancer reference center in Brazil were divided into 2 groups: intervention group (clear fluids with carbohydrate plus whey protein [CHO-P]) and control group (clear fluids with carbohydrate only [CHO]). All patients were evaluated by the Patient-Generated Subjective Global Assessment (PG-SGA) and body mass index. Logistic regression analyses were performed to assess associations between the studied variables, generating odds ratios (ORs) and 95% confidence intervals (CIs).

RESULTS

A total of 49 patients met the eligibility criteria and enrolled in the study. A PG-SGA score of 4-8, indicating moderate malnutrition (OR, 10.91; 95% CI, 1.05-112.91), was an independent factor that increased the risk of postoperative complication, whereas the CHO-P group (OR, 0.04; 95% CI, 0.01-0.26) was found to be an independent factor in reducing such risk.

CONCLUSION

The addition of whey protein to clear fluids (CHO-P group) was associated with a reduced risk of postoperative complications compared with the CHO group. Furthermore, moderate malnourishment was associated with an increased risk of postoperative complications for patients with HNC.

Surgical Site Infection Affects Length of Stay After Complex Head and Neck Procedures

OBJECTIVES/HYPOTHESIS

Quality improvement (QI) initiatives emphasize a need for reduction in hospital length of stay (LOS). We sought to determine the impact of surgical site infections (SSIs) on LOS after complex head and neck surgery (HNS).

STUDY DESIGN

Retrospective cohort analysis.

METHODS

An analysis of the American College of Surgeons National Surgical Quality Improvement Program was undertaken. All adult patients undergoing complex HNS from 2005 to 2016 were included in the analysis. Our main outcomes were SSI incidence and increase in hospital LOS attributable to SSI.

RESULTS

Of 4,014 patients identified, 16.5% developed SSI. History of smoking, diabetes, preoperative wound infection, contaminated or dirty wound classes, and prolonged operative time were found to significantly predict postoperative SSI. Adjusting for significant pre- and postoperative factors, SSI was associated with significantly increased LOS (hazard ratio = 0.486, 95% confidence interval: 0.419-0.522).

CONCLUSIONS

SSI following complex HNS is associated with significantly increased hospital LOS. This result supports the need for institutional QI strategies that target SSIs after head and neck procedures in an effort to provide the highest quality care at the lowest possible cost. Our analysis identifies risk factors that can allow identification of patients at high risk of SSI and prolonged hospitalization.

LEVEL OF EVIDENCE

2b Laryngoscope, 2020.

Throat Microbial Community Structure and Functional Changes in Postsurgery Laryngeal Carcinoma Patients

The microbial community structure in the throat and its shift after laryngectomy in laryngeal squamous cell carcinoma (LSCC) patients were investigated. Thirty swab samples taken prior to laryngectomy (SLC), 18 samples 1 week after laryngectomy (SLCA1w), and 30 samples 24 weeks after laryngectomy (SLCA24w) from 30 LSCC patients were examined. Microbial diversity was profiled through sequencing the V3-V4 variable region of the 16S rRNA gene. Quantitative real-time PCR (qPCR) was used to validate the 16S rRNA sequence data for the V3-V4 region. The community structure and function of throat microbiota were assessed by PICRUSt (phylogenetic investigation of communities by reconstruction of unobserved states) analysis. Both alpha and beta diversity results showed significant differences in the throat microbiota of LSCC patients before and after laryngectomy (P < 0.05). The drinking index of the SLC group was positively associated with the genus abundance of Prevotella (P < 0.05). The SLCA1w group had lower abundances of Fusobacterium, Leptotrichia, Lachnoanaerobaculum, and Veillonella than the SLC group (P < 0.05). The SLCA24w group had higher abundances of Streptococcus and Leptotrichia as well as lower abundances of Fusobacterium and Alloprevotella than the SLC group (P < 0.05). The throat microbiomes of the SLC group could be implicated in human cancer signaling pathways, as evidenced by PICRUSt analysis (P < 0.05). Our study clarifies alterations in throat microbial community structure and function in LSCC patients during the perioperative period and postoperative recovery period.IMPORTANCE Laryngeal squamous cell carcinoma greatly impacts patients' lives, and noninvasive means of prognostic assessment are valuable in determining the effectiveness of laryngectomy. We set out to study the microbial structure changes in the throat before and after laryngectomy and found the gene functions of several throat bacteria to be associated with human cancer signaling pathways. Our findings may offer insights into the disease management of patients with laryngeal squamous cell carcinoma. We hope to provide a means of using molecular mechanisms to improve the prognosis of laryngeal cancer treatment and to facilitate relevant research.

Prevalence of Multidrug-Resistant Organisms in Patients Undergoing Free Flap Reconstruction

OBJECTIVES/HYPOTHESIS

The purpose of this study is to evaluate the relationship between antibiotic prophylaxis and prevalence of multidrug-resistant organisms (MDRO) in patients undergoing head and neck cancer reconstruction.

STUDY DESIGN

Retrospective Chart Review.

METHODS

Retrospective review of patients who underwent head and neck free flap reconstruction at our institution between 2009 to 2016.

RESULTS

Of the 145 patients that underwent head and neck tumor removal surgery using free tissue flaps to cover the defect and therafter received antibiotic prophylaxis, 30 (20.7%) developed postoperative surgical site (n = 17, 55.7%) or distant (n = 13, 43.4%) infections. Seven had a multidrug-resistant infection, the most common with Methicillin-Resistant Staphylococcus aureus (MRSA). There was no significant relationship between antibiotic spectrum or duration to the development of postoperative infections or MDRO. Pseudomonas and MRSA infections were low overall with only one multidrug-resistant Pseudomonas infection.

CONCLUSIONS

The choice of antibiotic prophylaxis should cover organisms these patients are at highest risk for including anaerobes and Gram-negative organisms. A shorter duration of antibiotic prophylaxis should be considered given no increased risk of postoperative infection nor MDRO. Finally, one must be aware of the potential threat of multidrug-resistant Pseudomonas and MRSA amongst this vulnerable population and identity these with culture driven treatment.

LEVEL OF EVIDENCE

4 Laryngoscope, 131:E1881-E1887, 2021.

Antibiotic prophylaxis in oral and maxillofacial surgery: a systematic review

Surgical site infections are a complication of oral and maxillofacial procedures, with the potential for significant morbidity and mortality. Use of preoperative, perioperative, and postoperative antibiotic prophylaxis to reduce the incidence of surgical site infections must be balanced with considerations of a patients' risk of antibiotic-related adverse events. This review aimed to provide evidence-based recommendations for antibiotic prophylaxis. Searches were conducted using MEDLINE, the Cochrane Library, EMBASE, and PUBMED for maxillofacial procedures including: treatment of dental abscesses, extractions, implants, trauma, temporomandibular joints, orthognathics, malignant and benign tumour removal, and bone grafting, limited to articles published since 2000. A total of 98 out of 280 retrieved papers were included in the final analysis. Systematic reviews were assessed using AMSTAR criteria. Randomised controlled trials were assessed for bias using Cochrane Collaborative tools. The overall quality of evidence was assessed using GRADE. Prophylactic antibiotic use is recommended in surgical extractions of third molars, comminuted mandibular fractures, temporomandibular joint replacements, clean-contaminated tumour removal, and complex implants. Prophylactic antibiotic use is not routinely recommended in fractures of the upper or midface facial thirds. Further research is required to provide recommendations in orthognathic, cleft lip, palate, temporomandibular joint surgery, and maxillofacial surgical procedures in medically-compromised patients.

Acinetobacter: An Enemy after Head and Neck Cancer Operations with Microvascular Free Flap Reconstruction?

Background: Patients after head and neck cancer reconstructive surgical procedures are predisposed to have post-operative surgical site infections (SSI) develop. They are very often caused by multi-drug resistant strains, including Acinetobacter baumannii as the most common one. Methods: The aim of the study was to determine important risk factors contributing to SSI of A. baumannii origin. The analysis included 134 head and neck cancer patients after salvage operations with microvascular free flap reconstruction. The A. baumannii was cultured in 27 of all 48 infected patients. Results: The following risk factors were significantly associated with A. baumannii infection: re-hospitalization before reconstructive operation (p = 0.00011), massive blood loss (p = 0.00277), and need of revision surgical procedure (p = 0.00419). Of patients with A. baumannii infection, 48% were hospitalized in a general intensive care unit (ICU) after operation that, together with prolonged intubation, constituted a strong risk factor of that infection (p = 0.01077). Mean time of hospital stay was significantly longer in the A. baumannii group (58 days vs. 35 days; p = 0.02697). Conclusions: Our analysis identified a subset of head and neck cancer patients after salvage operation with microvascular free flap reconstruction who are at high risk of A. baumannii infection developing. Previously hospitalized patients with extensive blood loss and need of surgical revision necessitate increased monitoring for the development of this complication. Mechanical ventilation and hospital stay in an ICU should be shortened maximally or avoided in that challenging group of patients. Early recognition of patients at high risk remains a key point to prevent or limit the spread of A. baumannii infections.

Cefazolin versus ampicillin/sulbactam as an empiric antibiosis in severe odontogenic neck infection descending from the lower jaw-retrospective analysis of 350 cases

OBJECTIVES

Odontogenic infections descending from the lower jaw may lead to severe health conditions. Commonly, a biphasic treatment of surgical drainage and antibiotic therapy is conducted. The choice of the administered empiric antibiotic agent remains debatable.

MATERIAL AND METHODS

Retrospectively, we analyzed 350 medical records of patients who were consecutively treated with odontogenic infections descending from the lower jaw. All patients received surgical drainage and either cefazolin or ampicillin/sulbactam as empiric antibiosis. In particular, the number of secondary operations, infectious parameters, and length of in-hospital stay were investigated.

RESULTS

The most frequently infected space was the perimandibular/buccal space for both groups followed by the submandibular space. Number of revision procedures, early recurrence, and length of stay presented no significant difference between both groups (p > 0.05). Inflammatory parameters (c-reactive protein, leukocytes) similarly decreased in both groups.

CONCLUSION

Cefazolin targets the majority of the pathogens detected in severe odontogenic neck infections descending from the lower jaw and reveals comparable results to AMP/S in regard to the inflammatory parameters and in-hospital stay.

CLINICAL RELEVANCE

Cefazolin is a feasible empiric antibiosis for odontogenic neck infections descending from the lower jaw if surgical drainage is performed.

Head and neck surgical antibiotic prophylaxis in resource-constrained settings

PURPOSE OF REVIEW

Antimicrobial resistance represents a global threat and causes almost 700 000 deaths per year. The rapid dissemination of resistant bacteria is occurring globally, turning this into the primary threat to public health in the 21st century and forcing organizations around the globe to take urgent action.

RECENT FINDINGS

About risks related to surgical site infection (SSI) in head and neck surgery, surgical limitations in resource-constrained settings, comorbidities and the risk of SSI, evidence about surgical prophylaxis from low and middle-income countries, SSI gap between the developed and developing worlds and how to reduce resistance.

SUMMARY

Antibiotic protocols can be adjusted to local and regional bacterial resistance profiles, taking into account the availability of antibiotics and cost limitations on each country in order to decrease the SSI risk.

Multistep and Multidisciplinary Management for Post-irradiated Carotid Blowout Syndrome in a Young Patient With Oropharyngeal Carcinoma: A Case Report

BACKGROUND

Carotid blowout syndrome is a severe complication of head and neck cancer, associated with high mortality and morbidity.

METHODS

We present a case of acute hemorrhage from the carotid artery of a 59-year-old man with a history of chemoradiotherapy for lingual base and oropharyngeal squamous cell carcinoma. The case was managed by a staged multidisciplinary approach of open arterial reconstruction, after initial endovascular hemorrhage control using stent graft.

RESULTS

The patient was discharged to home with patent carotid artery, no sign of infection or bleeding, and autonomous ambulation. A CT/PET scan performed 6 months later confirmed healing and absence of tumor recurrence.

CONCLUSIONS

A multidisciplinary approach involving vascular surgeons, ENT surgeons, plastic and maxillofacial surgeons is particularly appropriate in the management of carotid blowout syndrome to warrant a durable and effective repair of all the anatomical structures involved.

Perioperative Clindamycin Use in Penicillin Allergic Patients Is Associated With a Higher Risk of Infection After Shoulder Arthroplasty

BACKGROUND

This study determines whether infection rates differ between prophylactic antibiotic use for patients with or without penicillin allergy before shoulder arthroplasty surgery.

METHODS

Seven thousand one hundred forty primary shoulder arthroplasties operated between 2005 and 2016 were identified. We compared deep surgical site infection risk of patients who received perioperative vancomycin alone (6.2%, N = 444) or clindamycin alone (7.1%, N = 508) for penicillin allergy versus patients who received cefazolin alone without penicillin allergy (86.7%, N = 6,188).

RESULTS

Seventy deep infections (1.2% 5-year cumulative incidence) were observed. The most common organism was Cutibacterium acnes (39.4%, N = 27). Compared with patients treated with cefazolin, infection risk was not different for those treated with vancomycin (hazard ratio = 1.17, 95% confidence interval 0.42 to 3.30, P = 0.8), but a higher risk of infection was identified for those treated with clindamycin alone (hazard ratio = 3.45, 95% confidence interval 1.84 to 6.47, P < 0.001).

CONCLUSION

A higher risk of postoperative infection is found after prophylactic use of intravenous clindamycin antibiotic after shoulder arthroplasty. Vancomycin is preferred over clindamycin for patients with penicillin allergy.

LEVEL OF EVIDENCE

III, retrospective cohort study.

Wound monitoring of pH and oxygen in patients after radiation therapy

OBJECTIVES

Postradiogenic wound healing disorders are an important clinical problem. While a variety of treatment modalities are available, there is no strategy to objectively judge treatment success. The aim of this study was to evaluate a 2D luminescence imaging system for pH and oxygen in non-healing wounds after radiotherapy.

METHODS

Luminescence 2D imaging was performed with the VisiSens (Presens, Regensburg, Germany) 2D imaging systems A1 and A2 for oxygen and pH, respectively. Biocompatible planar luminescent sensor foils were applied to non-irradiated and irradiated skin as well as to radiogenic wounds of five patients and the pH and the oxygen saturation was determined.

RESULTS

pH measurements showed significant differences between non-irradiated skin (6.46 ± 0.18) and irradiated skin (6.96 ± 0.26). Radiogenic wounds exhibited the highest pH values (7.53 ± 0.26). Oxygen measurements revealed a mean oxygen saturation of non-irradiated skin of 6.19 ± 0.83 mmHg. The highest value of oxygen saturation (28.4 ± 2.4 mmHg) was found on irradiated skin while irradiated wounds had a poor oxygen saturation (9.4 ± 2.2 mmHg) (mean ± s.e.m.).

CONCLUSION

We found that routine measurement of pH and pO2 in patients could be easily integrated into the clinical routine. The results of the measurements show unfavorable pH and oxygen saturation conditions for wound healing in irradiated wounds. Interestingly, irradiated wounds exhibit a more pronounced hypoxia than irradiated skin which is reflected by an altered pH and pO2 compared to unirradiated skin, which has the potential to serve as a prognostic marker in the future. In addition to the objectification of the treatment success of postradiogenic wound healing disorders, the extent of skin toxicity could already be predicted during radiotherapy with this method.

Oral recipient site infections in reconstructive surgery - impact of the graft itself and the perioperative antibiosis

OBJECTIVES

This study was designed to assess the influence of peri/post-operative antibiotic prophylaxis (POABP) and the reconstructive graft itself on recipient sites infections in head and neck surgery.

MATERIALS AND METHODS

In this retrospective cohort study, 322 consecutive patients with reconstructive surgery were investigated. The primary objective was to analyze the differences of commonly applied reconstructive grafts on the occurrence of oral recipient site infections. Moreover, differences of POABP regimes (namely: ampicillin/sulbactam, 2^nd generation cephalosporins, clindamycin) and antibiotic alternatives were investigated. In addition, patients' length of in-hospital stay was analyzed in regard to reconstructive graft and POABP regime.

RESULTS

The free radial forearm flap and split-thickness skin graft presented significantly less recipient site infections and shorter length of in-hospital stays (LOS) in comparison to further six reconstructive technique with pedicled tissue transfer or bone transfers. LOS was significantly shorter for patients with ampicillin/sulbactam than with 2^nd generation cephalosporins as POABP. 91% of the harvested pathogens (n=193) were susceptible to the combination of 2^nd and 3^rd generation cephalosporins. Secondly, 92 out 113 (81%) harvested pathogens presented susceptibility to moxifloxacin.

CONCLUSION

Smaller tissue transfers are less prone to infections of the recipient site and present low LOS. For an POABP regime, the combination of 2^nd and 3^rd generation cephalosporins presents substantial results in recipient site infections. In cases of allergy, potential pathogens show adequate susceptibility to moxifloxacin.

CLINICAL RELEVANCE

A combination of 2^nd and 3^rd generation cephalosporins may be used to prevent recipient sites in head and neck surgery.

Oral recipient site infections in reconstructive surgery - impact of the graft itself and the perioperative antibiosis

OBJECTIVES

This study was designed to assess the influence of peri/post-operative antibiotic prophylaxis (POABP) and the reconstructive graft itself on recipient sites infections in head and neck surgery.

MATERIALS AND METHODS

In this retrospective cohort study, 322 consecutive patients with reconstructive surgery were investigated. The primary objective was to analyze the differences of commonly applied reconstructive grafts on the occurrence of oral recipient site infections. Moreover, differences of POABP regimes (namely: ampicillin/sulbactam, 2^nd generation cephalosporins, clindamycin) and antibiotic alternatives were investigated. In addition, patients' length of in-hospital stay was analyzed in regard to reconstructive graft and POABP regime.

RESULTS

The free radial forearm flap and split-thickness skin graft presented significantly less recipient site infections and shorter length of in-hospital stays (LOS) in comparison to further six reconstructive technique with pedicled tissue transfer or bone transfers. LOS was significantly shorter for patients with ampicillin/sulbactam than with 2^nd generation cephalosporins as POABP. 91% of the harvested pathogens (n=193) were susceptible to the combination of 2^nd and 3^rd generation cephalosporins. Secondly, 92 out 113 (81%) harvested pathogens presented susceptibility to moxifloxacin.

CONCLUSION

Smaller tissue transfers are less prone to infections of the recipient site and present low LOS. For an POABP regime, the combination of 2^nd and 3^rd generation cephalosporins presents substantial results in recipient site infections. In cases of allergy, potential pathogens show adequate susceptibility to moxifloxacin.

CLINICAL RELEVANCE

A combination of 2^nd and 3^rd generation cephalosporins may be used to prevent recipient sites in head and neck surgery.

Quality Assessment in Supportive Care in Head and Neck Cancer

Quality assessment is a key issue in every clinical intervention, to be periodically performed so to measure the adherence to standard and to possibly implement strategies to improve its performance. This topic is rarely discussed for what concerns supportive care; however, it is necessary to verify the quality of the supportive measures; “supportive care makes excellent cancer care possible,” as stated by the Multinational Association of Supportive Care in Cancer (MASCC). In this regard, the quality of supportive care in head and neck cancer patients is a crucial topic, both to allow administration of treatments according to planned dose intensity or surgical indications and to maintain or improve patients' quality of life. This paper aims to provide insight on state of the art supportive care and its future developments for locally advanced and recurrent/metastatic head and neck cancer, with a focus on quality assessment in relation to surgery, radiotherapy, and systemic therapy.

Short-term influences of radiation on musculofascial healing in a laparotomy rat model

Preoperative radiation is associated with an increased risk of wound complications. However, the influences of radiation on musculofascial wound healing remains unclear. The purpose of the study was to investigate the short-term effects of preoperative local radiation on the musculofascial healing of laparotomy incisions in a rat model. Eighteen Fischer 344 rats received radiation doses of 0, 10, or 20 Gy to the abdominal wall and underwent laparotomy 4 weeks later. Two weeks after laparotomy, samples of irradiated muscle were harvested for mechanical tests, histological (Hematoxylin & Eosin, and Masson's Trichrome) and immunohistochemical analyses using KI67, CD31, TGF-β, and MYOD1 antibodies. The elastic modulus (EM), maximum strain (MS), and ultimate tensile strength (UTS) in the 20-Gy group were significantly weaker than those in the 0-Gy group. The EM and UTS in the 20-Gy group were significantly lower than those in the 10-Gy group. The UTS and MS in the 10-Gy group were significantly lower than those in the 0-Gy group. The mean number of inflammatory cells per mm² in the 20-Gy group was significantly larger than those in the 10- and 0-Gy groups. The mean numbers of CD31-, KI67-, and MYOD1-positive cells, the optical density of TGF-β, and the microvessel density in the 20-Gy group were significantly smaller than those in the 10- and 0-Gy groups. These results indicated that radiation delays musculofascial healing and decreases mechanical strength of the laparotomy incision by creating a chronic inflammatory environment, inhibiting cell proliferation, angiogenesis, granulation maturation, collagen deposition, and muscular regeneration in a dose-dependent manner. The impaired biomechanical, histological and molecular properties may be associated with the higher risk of wound complications in patients who undergo radiotherapy prior to laparotomy.

Bacterial contamination of surgical loupes and headlights

BACKGROUND

Medical equipment can transmit pathogenic bacteria to patients. This single-institution point prevalence study aimed to characterise the types and relative amount of bacteria found on surgical loupes, headlights and their battery packs.

METHOD

Surgical loupes, headlights and battery packs of 16 otolaryngology staff and residents were sampled, cultured and quantified. Plate scores were summed for each equipment type, and the total was divided by the number of users to generate mean bacterial burden scores. Residents completed a questionnaire regarding their equipment cleaning practices.

RESULTS

The contamination rates of loupes, headlights and battery packs were 68.75 per cent, 100 per cent and 75 per cent, respectively. Battery packs cultured more bacteria (1.58 per swab ± 1.00) than loupes (0.75 per swab ± 0.66; p = 0.024). Headlights had non-significantly greater growth (1.50 per swab ± 0.71) than loupes (p = 0.052). Bacterial growth was significantly higher from inner surfaces of loupes (p = 0.035) and headlights (p = 0.037). Potentially pathogenic bacteria were cultured from the equipment of five participants, including: Pantoea agglomerans, Acinetobacter radioresistens, Staphylococcus aureus, Acinetobacter calcoaceticus baumannii complex and Moraxella osloensis.

CONCLUSION

This study demonstrates that surgical loupes and headlights used in otolaryngology harbour non-pathogenic skin flora and potentially pathogenic bacteria.

Professional Oral Health Care at General Dental Clinic Reduces Postoperative Complications of Head and Neck Free-Flap Reconstruction Surgery

Background: Extensive resection and free-flap reconstruction surgery has become the standard treatment for locally advanced head and neck cancer. Surgical site infection (SSI) is one of the serious complications of this treatment. This study aimed to investigate the risk factor for onset of SSI, particularly focusing on whether preoperative professional oral health care in cooperation with general dental clinics is effective in reducing the occurrence of SSI.

Methods: From March 2003 to August 2011, 183 patients who underwent head and neck free-flap reconstructive surgery by the same plastic surgeon at Miyagi Cancer Center for Head and Neck Surgery were investigated retrospectively.

Results: Of the 183 patients, 135 and 48 were men and women, respectively, with a mean age of 62 (range, 29-82) years. The tumor was located in the oral cavity (n = 76), hypopharynx (n = 55), oropharynx (n = 28), and others (n = 24). Clinical stages were stage I/II in 18, stage III/IV in 164 patients, and benign tumor in one patient, based on UICC classification. SSI occurred in 66 patients (36.1%). Based on multivariate analysis, professional oral health care [P = 0.0076, odds ratio (OR) = 0.39] and radiation therapy history (P = 0.0214, OR = 2.820) were shown as factors that are significantly related to SSI.

Conclusion: This study identified history of radiation therapy as a significant risk factor for SSI from univariate and multivariate analysis and revealed that patients receiving preoperative professional oral health care at general dental clinics reduce the risk of SSI. Preoperative professional oral health care in cooperation with general dental clinics has been shown to reduce SSI of head and neck free-flap reconstructive surgery.