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The latest medical research on Oral & Maxillofacial Surgery

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Association of Collagen Changes in Distal Anastomotic Margin and Anastomotic Stenosis after Neoadjuvant Chemoradiotherapy for Rectal Cancer.

Journal of the

Neoadjuvant chemoradiotherapy(nCRT) for rectal cancer can lead to structural changes in collagen in the tumor microenvironment and increase the risk of postoperative anastomotic stenosis (AS). However, the quantitative relationship between AS and collagen has not been defined. This study is to quantitatively analyze the collagen features in rectal cancer and explore the relationship between the changes of collagen and postoperative anastomotic stenosis after nCRT.

This study is a retrospective study. A total of 371 patients with rectal cancer were included. Collagen features in the resection margin of rectal cancer anastomosis was extracted by multi-photon imaging. LASSO-logistic regression was performed to select features related to AS and the collagen score (CS) was constructed. Area under the receiver operating curve (AUROC) and decision curve analysis was performed to evaluate the discrimination and clinical benefit of the nomogram.

The probability of AS was 23% in the training cohort and 15.9% in the validation cohort. In the training cohort, the distance between tumor and resection margin, anastomotic leakage and CS were independent risk factors for postoperative AS in univariate and multivariate analyses. A nomogram was constructed based on the above results. The prediction nomogram showed good discrimination (AUROC, 0.864;95% CI, 0.776 to 0.952) and was validated in the validation cohort (AUROC, 0.918;95% CI, 0.851 to 0.985).

CS is an independent risk factor for AS in rectal cancer after nCRT. The predictive model based on CS can predict the occurrence of postoperative AS.

Lack of Concordance Between Abbreviated Injury Scale and American Association for the Surgery of Trauma Organ Injury Scale in Patients with High-Grade Solid Organ Injury.

Journal of the

The Abbreviated Injury Scale (AIS) is widely utilized for body region-specific injury severity. The AAST-Organ Injury Scale (AAST-OIS) provides organ-specific injury severity but is not included in trauma databases. Previous researchers have used AIS as a surrogate for OIS. This study aims to assess AIS-abdomen concordance with AAST-OIS grade for liver and spleen injuries, hypothesizing concordance in terms of severity (grade of OIS and AIS) and patient outcomes.

This retrospective study (7/2020-6/2022) was performed at three trauma centers. Adult trauma patients with AAST-OIS grade III-V liver and/or spleen injury were included. AAST-OIS grade for each organ was compared to AIS-abdomen by evaluating the percentage of AAST-OIS grade correlating with each AIS score as well as rates of operative intervention for these injuries. Analysis was performed with Chi-square tests and univariate analysis.

Of 472 patients, 274 had liver injuries and 205 had spleen injuries grades III-V. AAST-OIS grade III-V liver injuries had concordances rates of 85.5%, 71% and 90.9% with corresponding AIS 3-5 scores. AAST-OIS grade III-V spleen injuries had concordances rates of 89.7%, 87.8% and 87.3%. There was a statistical lack of concordance for both liver and spleen injuries (both p<0.001). Additionally, there were higher rates of operative intervention for AAST-OIS grade IV and V liver injuries and grade III and V spleen injuries versus corresponding AIS scores (p<0.05).

AIS should not be used interchangeably with OIS due to lack of concordance. AAST-OIS should be included in trauma databases to facilitate improved organ injury research and quality improvement projects.

Identifying Population-Level and Within-Hospital Disparities in Surgical Care.

Journal of the

The lack of consensus on equity measurement and its incorporation into quality-assessment programs at the hospital and system levels may be a barrier to addressing disparities in surgical care. This study aimed to identify population-level and within-hospital differences in the quality of surgical care provision.

The analysis included 657 National Surgical Quality Improvement Program participating hospitals with over 4 million patients (2014-2018). Multi-level random slope, random intercept modeling was used to examine for population-level and in-hospital disparities. Disparities in surgical care by Area Deprivation Index (ADI), race, and ethnicity were analyzed for five measures: all-case inpatient mortality, all-case urgent readmission, all-case postoperative surgical site infection, colectomy mortality, and spine surgery complications.

Population-level disparities were identified across all measures by ADI, two measures for Black race (all-case readmissions and spine surgery complications), and none for Hispanic ethnicity. Disparities remained significant in the adjusted models. Prior to risk-adjustment, in all measures examined, within-hospital disparities were detected in: 25.8-99.8% of hospitals for ADI, 0-6.1% of hospitals for Black race, and 0-0.8% of hospitals for Hispanic ethnicity. Following risk-adjustment, in all measures examined, fewer than 1.1% of hospitals demonstrated disparities by ADI, race, or ethnicity.

Following risk adjustment, very few hospitals demonstrated significant disparities in care. Disparities were more frequently detected by ADI than by race and ethnicity. The lack of substantial in-hospital disparities may be due to the use of postoperative metrics, small sample sizes, the risk adjustment methodology, and healthcare segregation. Further work should examine surgical access and healthcare segregation.

Thirty- and 90-Day Morbidity and Mortality by Clavien-Dindo 30 and 90 Days after Surgery for Antireflux and Hiatal Hernia.

Journal of the

The historic morbidity and mortality rates of anti-reflux and hiatal hernia surgery are reported as 3-21% and 0.2-0.5%, respectively. These data come from either large national/population level or small institutional studies, with the former focusing on broad 30-day outcomes while lacking granular data on complications and their severity. Institutional studies tend to focus on long-term and quality of life outcomes. Our objective is to describe and evaluate the incidence of 30 and 90-day morbidity and mortality in a large, single institution dataset.

We retrospectively reviewed 2342 cases of anti-reflux and hiatal hernia surgery from 2003-2020 for intra-operative complications causing post-operative sequelae, as well as morbidity and mortality within 90 days. All complications were graded using the Clavien-Dindo (CD) Grading System. The highest-grade of complication was used per patient during 30-day and 31-90-day intervals.

Out of 2342 patients, the overall 30-day morbidity and mortality rates were 18.2% (427/2342) and 0.2% (4/2342), respectively. Most of the complications were CD<3a at 13.1% (306/2342). In the 31-90-day post-operative period, morbidity and mortality rates decreased to 3.1% (78/2338) and 0.09% (2/2338). CD<3a complications accounted for 1.9% (42/2338).

Anti-reflux and hiatal hernia surgery are safe operations with rare mortality and modest rates of morbidity. However, the majority of complications patients experience are minor (CD<3a) and are easily managed. A minority of patients will experience major complications (CD≥3a) that require additional procedures and management to secure a safe outcome. These data are helpful to inform patients of the risks of surgery, and guide physicians for optimal consent.

Impostor Phenomenon and Impact on Women Surgeons: A Canadian Cross-Sectional Survey.

Journal of the

This project aims to characterize the extent and nature of IP among women surgeons in Canada. Impostor Phenomenon (IP) is well documented among medical professionals and trainees. It is known to have significant impacts on mental health and career trajectory.

We conducted a cross-sectional survey of self-identifying women who have completed a surgical residency and currently or most recently practiced in Canada.

Among 387 respondents, 98.7% have experienced IP. Median IP score corresponded to frequent impostor feelings or high impostorism. Self-doubt affects most women surgeons for the first time during training. It tends to be most intense in the first 5 years of practice and lessens over time. 112 surgeons (31.5%) experience self-doubt in the OR. Due to self-doubt, 110 respondents (28.4%) preferred to work with a more experienced assistant in the OR, while 40 (10.4%) stated that they would only operate with an experienced assistant. Few surgeons take on less OR time due to self-doubt (29 (7.5%)) but 60 (16.5%) take on less complex cases due to self-doubt. A small but important number of surgeons (11 (2.8%)) had given up operating altogether due to self-doubt. Due to feelings of self-doubt, 107 (21.4%) were hesitant to take on a leadership role in the workplace.

IP is a nearly universal experience among women surgeons and is influential in their professional lives. This study contributes to scientific knowledge that can advance gender equity in medicine and leadership.

Drivers of Variation in Opioid Prescribing after Common Surgical Procedures in a Large Multihospital Healthcare System.

Journal of the

Misuse of prescription opioids is a well-established contributor to the United States opioid epidemic. The primary objective of this study was to identify which level of care delivery (i.e. patient, prescriber, or hospital) produced the most unwarranted variation in opioid prescribing after common surgical procedures.

Electronic health record (EHR) data from a large multihospital healthcare system was used in conjunction with random-effect models to examine variation in opioid prescribing practices following similar inpatient and outpatient surgical procedures between October 2019 and September 2021. Unwarranted variation was conceptualized as variation resulting from prescriber behavior unsupported by evidence. Covariates identified as drivers of warranted variation included characteristics known to influence pain levels or patient safety. All other model variables, including prescriber specialty and patient race, ethnicity, and insurance status were characterized as potential drivers of unwarranted variation.

Among 25,188 procedures with an opioid prescription at hospital discharge, 53.5% exceeded guideline recommendations, corresponding to 13,228 patients receiving the equivalent of >140,000 excess 5mg oxycodone tablets following surgical procedures. Prescribing variation was primarily driven by prescriber-level factors, with approximately half of the total variation in morphine milligram equivalents (MMEs) prescribed observed at the prescriber level and not explained by any measured variables. Unwarranted covariates associated with higher prescribed opioid quantity included non-Hispanic black race, Medicare insurance, smoking history, later hospital discharge times, and prescription by a surgeon rather than a hospitalist or primary care provider.

Given the large proportion of unexplained variation observed at the provider level, targeting prescribers through education and training may be an effective strategy for reducing postoperative opioid prescribing.

What Do We Owe Our Patients? Surgeons' Obligations When Patients are Too Sick for Surgery.

Journal of the

As the principle of respect for patient autonomy has gained salience over the past 75 years, surgeons now struggle to resolve conflicts between aut...

Fidelity in Academic Global Surgery and Research: Incorporating Trustworthiness in the Development of Research Partnerships, Infrastructure, and Policy.

Journal of the

Academic global surgery consists of collaborative partnerships that address surgical inequities through research, training, education, advocacy, an...

Clinical Outcomes of a Large, Prospective Series of Gastric Electrical Stimulation Patients Using a Multidisciplinary Protocol.

Journal of the

Gastric electrical stimulation (GES) is an intervention used in the treatment of medically refractory gastroparesis. There are few large series demonstrating efficacy over a long-term follow-up period. This study reports clinical outcomes for patients from a single institution up to 5 years.

A prospective database of patients undergoing GES implantation for gastroparesis was collected and reviewed. Patients were selected according to a multi-disciplinary institutional protocol. Baseline characteristics, including age, sex, smoking history, etiology of gastroparesis, and duration of gastroparesis symptoms, were collected. Symptomatic response was evaluated utilizing Gastroparesis Cardinal Symptom Index (GCSI) surveys pre-operatively and at subsequent follow-up visits. Other clinical outcome variables include medication use, hospitalizations due to gastroparesis, and overall satisfaction with symptom relief. Patient outcomes regarding reoperation and explantation were also recorded.

157 patients underwent GES at our institution since 2012. GCSI scores were collected in all patients at baseline, in 141 patients at 1 year follow-up, and in 110 patients at 5 years follow-up. Symptom severity in all 9 gastroparesis symptoms evaluated by the GCSI, as well as the total GCSI score, was reduced significantly at 1 year post-operatively, and these results were sustained at 5-year follow-up. Use of prokinetic and antiemetic medications was reduced during the follow-up period. Hospitalizations due to gastroparesis symptoms were also reduced. GES devices were explanted in 5 patients, 12 patients required generator exchanges, and 7 patients required reoperation due to displaced/eroded device leads during the study period.

Gastric electrical stimulation is associated with sustained symptomatic relief, reduced reliance on medications, and reduced hospitalizations in gastroparesis patients selected utilizing our institutional protocol.

Gas and Bloat in Female Patients after Anti-Reflux Procedures: Analysis of 934 Cases.

Journal of the

Anti-reflux procedures (ARPs) are effective treatments for gastroesophageal reflux disease (GERD). However, variation in objective and patient reported outcomes persists. Limited evidence and anecdotal experience suggest that patient sex may play a role. The objective of this study was to compare outcomes after ARPs between male and female patients.

We performed a retrospective review of a prospectively maintained database at a single institution. All patients who underwent an ARP for GERD were included. Demographic, clinical, and patient reported outcomes data (GERD-Health Related Quality of Life, Reflux Symptom Index), as well as radiographic hernia recurrence were collected and stratified by sex. Uni- and multivariable logistic and mixed effects linear regression were used to control for confounding effects.

Between 2009 and 2022, 934 patients (291 males, 643 females) underwent an ARP. Reflux Symptom Index, GERD-HRQL, and gas/bloat scores improved uniformly for both sexes, though female patients were more likely to have higher gas/bloat scores one year post-procedure (mean ± SD 1.7 ± 1.4 vs 1.4 ± 1.3, p=0.03) and higher GERD-HRQL scores two years post-procedure (6.3 ± 8.1 vs 4.7 ± 6.8, p=0.04). Higher gas/bloat scores in females persisted on regression controlling for confounders. Hernia recurrence rates were low (85 patients, 9%) and were similar for both sexes. A final intraprocedural DI ≥3mm 2/mmHg was significantly associated with a 7 times higher rate of recurrence (95% CI 1.62-31.22, p=0.01).

While patients of either sex experience symptom improvement and low rates of recurrence after ARPs, females are more likely to endorse gas/bloat compared to males. Final distensibility ≥3mm 2/mmHg carries a high risk of recurrence. These results may augment how physicians prognosticate during consultations and tailor their treatments in patients with GERD.

Procedure Risk vs Frailty in Outcomes for Elderly Emergency General Surgery Patients: Results of a National Analysis.

Journal of the

The direct association between procedure risk and outcomes in elderly emergency general surgery (EGS) patients has not been analyzed. Studies only highlight the importance of frailty. A comprehensive analysis of relevant risk factors and their association with outcomes in elderly EGS patients is lacking. We hypothesized that procedure risk has a stronger association with relevant outcomes in elderly EGS patients compared to frailty.

Elderly patients (age > 65) undergoing emergency general surgery operative procedures were identified in the NSQIP) database (2018 to 2020) and stratified based on the presence of frailty calculated by the Modified 5 Item Frailty Index (mFI-5; mFI 0 Non-Frail, mFI 1-2 Frail, and mFI ≥3 Severely Frail) and based on procedure risk. Multivariable regression models and Receiving Operative Curve (ROC) analysis were used to determine risk factors associated with outcomes.

A total of 59,633 elderly EGS patients were classified into non-frail (17,496; 29.3%), frail (39,588; 66.4%), and severely frail (2,549; 4.3%). There were 25,157 patients in the low-risk procedure group and 34,476 in the high-risk group.Frailty and procedure risk were associated with increased mortality, complications, failure to rescue, and readmissions. Differences in outcomes were greater when patients were stratified according to procedure risk compared to frailty stratification alone. Procedure risk had a stronger association with relevant outcomes in elderly EGS patients compared to frailty.

Assessing frailty in the elderly EGS patient population without adjusting for the type of procedure or procedure risk ultimately presents an incomplete representation of how frailty impacts patient-related outcomes.

Prospective Outpatient Follow-Up of Early Cognitive Impairment in Patients with Mild Traumatic Brain Injury and Intracranial Hemorrhage.

Journal of the

Mild traumatic brain injury (mTBI) encompasses a spectrum of disability including early cognitive impairment (ECI). The Brain Injury Guidelines (BIG) suggest mTBI patients can be safely discharged from the Emergency Department. Although half of mTBI patients with intracranial hemorrhage (ICH) have evidence of ECI, it is unclear what percentage of these patients' ECI persists after discharge. We hypothesize a significant proportion of trauma patients with mTBI and ECI at presentation have persistent ECI at 30-day follow-up.

A single-center prospective cohort study including adult trauma patients with ICH or skull fracture plus a Glasgow coma scale (GCS) of 13-15 on arrival was performed. Participants were screened for ECI using the Rancho Los Amigos Scale (RLA), and ECI was defined as a RLA < 8. We compared ECI and non-ECI groups for demographics, injury profile, computed tomography (CT) imaging (e.g., Rotterdam CT score) and outcomes with bivariate analysis. 30-day follow up phone calls were performed to re-evaluate RLA for persistent ECI and concussion symptoms.

From 62 patients with ICH or skull fracture and mTBI, 21 (33.9%) had ECI. Patients with ECI had a higher incidence of subarachnoid hemorrhage (85.7% versus 46.3%, p=0.003) and higher Rotterdam CT score (p=0.004) compared to those without ECI. On 30-day follow up, 6 of 21 patients (26.6%) had persistent ECI. In addition, 7 (33.3%) patients had continued concussion symptoms.

Over one-third of mTBI patients with ICH had ECI. At 30-day post-discharge follow-up over one-fourth of these patients had persistent ECI and 33% had concussion symptoms. This highlights the importance of identifying ECI prior to discharge as a significant portion may have ongoing difficulties reintegrating into work and society.