Publications by authors named "Daithi S Heffernan"

Introduction: Currently, there is no mandatory standard for reporting race and ethnicity in medical journals, presenting significant barriers to studying disparities in medical outcomes. We seek to investigate whether greater recent awareness of diversity and inclusion reflects in reporting of race and ethnicity by peer-reviewed cardiothoracic articles.

Methods: Pubmed was queried for clinical outcomes articles published from January 2017 to June 2023 in the Journal of Thoracic and Cardiovascular Surgery, Annals of Thoracic Surgery, Journal of Heart and Lung Transplantation, and CHEST Journal.

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Article Synopsis
  • The Surgical Infection Society (SIS) has updated its evidence-based guidelines for managing intra-abdominal infections (IAI) after a systematic review of literature from 2016 to February 2024.
  • This update includes new recommendations and revisions based on rigorous evaluations of evidence using the GRADE system, which ranks the strength and quality of recommendations.
  • Key topics covered involve antimicrobial agent selection, treatment timing and methods, pathogen-specific treatments, and the implementation of antimicrobial stewardship programs in hospitals.
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Introduction: A dysregulated immune system is a major driver of the mortality and long-term morbidity from sepsis. With respect to macrophages, it has been shown that phenotypic changes are critical to effector function in response to acute infections, including intra-abdominal sepsis. Invariant natural killer T cells (iNKT cells) have emerged as potential central regulators of the immune response to a variety of infectious insults.

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Background: The recruitment of neutrophils to sites of localized injury or infection is initiated by changes on the surface of endothelial cells located in proximity to tissue damage. Inflammatory mediators, such as TNF-α, increase surface expression of adhesive ligands and receptors on the endothelial surface to which neutrophils tether and adhere. Neutrophils then transit through the activated endothelium to reach sites of tissue injury with little lasting vascular injury.

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Background: iNKT-cells are innate regulatory lymphocytes capable of directing immune and inflammatory responses to sepsis. Repeat stimulation of iNKT-cells leads to the induction of anergy with the emergence of a hyporesponsive CD3 iNKT-cell subpopulation.

Methods: iNKT-cells were isolated from critical ill surgical patients with sepsis and phenotyped for CD3 expression.

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Background: Sepsis is marked by a dysregulated immune response to an infection. Invariant natural killer T cells ( i NKT cells) are a pluripotent lymphocyte subpopulation capable of affecting and coordinating the immune response to sepsis. The spleen is an important site of immune interactions in response to an infection.

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Introduction: The co-regulatory molecule, HVEM, can stimulate or inhibit immune function, but when co-expressed with BTLA, forms an inert complex preventing signaling. Altered HVEM or BTLA expression, separately have been associated with increased nosocomial infections in critical illness. Given that severe injury induces immunosuppression, we hypothesized that varying severity of shock and sepsis in murine models and critically ill patients would induce variable increases in HVEM/BTLA leukocyte co-expression.

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Small bowel obstructions are common surgical presentations that are most often caused by adhesions following abdominopelvic surgeries. However, in patients with no history of abdominal surgical interventions, assessment of the cause of a small bowel obstruction is more complex, and such patients frequently require operative intervention. We present a case of a 65-year-old man who presented with a small bowel obstruction caused by an inadvertent ingestion of a bread tag that was not identified on preoperative imaging.

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Background: Acute Appendicitis (AA), one of the most common surgical emergencies, is usually managed operatively. There is a paucity of data addressing how HIV/AIDS affects management of acute uncomplicated appendicitis.

Methods: A retrospective review of HIV/AIDS positive (HPos) versus negative (HNeg) patients with acute, uncomplicated appendicitis over a 19-year period.

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Introduction: Protective devices such as seat belts and helmets save lives. Most studies only address one aspect of the injury profile - compliance or mortality - not the entire spectrum of trauma care, and little attention is paid to racial differences in the use or impact of protective devices.

Methods: Patients with blunt mechanisms where using protective devices would be expected were included and were divided into utilizing (P) vs not utilizing protection (Non-P).

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Objective: Decompressive craniectomy is recommended to reduce mortality in severe traumatic brain injury (TBI). Disparities exist in TBI treatment outcomes; however, data on disparities pertaining to decompressive craniectomy utilization is lacking. We investigated these disparities, focusing on race, insurance, sex, and age.

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Patients with disseminated cancer at higher risk for postoperative mortality see improved outcomes with altered clinical management. Being able to risk stratify patients immediately after their index surgery to flag high risk patients for healthcare providers is vital. The combination of physician uncertainty and a demonstrated optimism bias often lead to an overestimation of patient life expectancy which can precent proper end of life counseling and lead to inadequate postoperative follow up.

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Article Synopsis
  • Surgical stabilization of rib fractures (SSRF) leads to lower mortality but is associated with a higher risk of infectious complications compared to epidural analgesia (EA).
  • A retrospective study analyzed data from 2,252 patients undergoing SSRF and 1,299 receiving EA, finding that SSRF patients tended to be younger but had higher rates of sepsis and specific infections like VAP, CAUTI, and CLABSI.
  • Although patients who underwent SSRF showed increased odds of developing complications, the overall mortality and length of hospital stay were similar between the two treatment groups.
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Introduction: Approaches to COVID-19 mitigation can be more efficiently delivered with a more detailed understanding of where the severe cases occur. Our objective was to assess which demographic, housing and neighborhood characteristics were independently and collectively associated with differing rates of severe COVID-19.

Methods: A cohort of patients with SARS-CoV-2 in a single health system from March 1, 2020 to February 15, 2021 was reviewed to determine whether demographic, housing, or neighborhood characteristics are associated with higher rates of severe COVID-19 infections and to create a novel scoring index.

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Surgical management for gynecologic malignancies often involves hysterectomy, often constituting the most common gynecologic surgery worldwide. Despite maximal surgical and medical care, gynecologic malignancies have a high rate of recurrence following surgery. Current machine learning models use advanced pathology data that is often inaccessible within low-resource settings and are specific to singular cancer types.

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Article Synopsis
  • This study looks at how insurance status, particularly for dual-eligible beneficiaries (those with both Medicare and Medicaid), affects outcomes for patients hospitalized due to hemorrhagic strokes, drawing on a decade's worth of data.* -
  • Among the analyzed 410,621 patients, dual-eligible individuals tended to be older (average age 73) and had higher rates of in-hospital mortality and complications compared to those with Medicaid or private insurance.* -
  • The results indicated dual-eligibles had significantly increased odds of complications and lower chances of favorable discharge outcomes compared to other patient groups, highlighting their vulnerability in emergency healthcare situations.*
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We report a 73-year-old male with recurrent amelanotic malignant melanoma of the left foot with in-transit metastases to the left thigh. In-transit metastatic melanoma can often represent a diagnostic and therapeutic challenge for physicians. This patient was treated with talimogene laherparepvec injections (T-VEC; Imlygic) in the left inguinal and the left plantar region every two weeks for one year as oncolytic viral therapy for advanced non- operable malignant melanoma.

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Trauma increases the risk for infection, but it is unknown how infection affects goals-of-care (GOC) decision making. We sought to determine how infections impact transition to comfort measures only (CMO), hypothesizing that infectious complications would expedite withdrawal of life-sustaining treatment (WOLST). We performed a retrospective review at a level-one trauma center over two years for adult patients without pre-existing advance directives who were made CMO with length of stay longer than one day.

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Morbidity and mortality associated with neonatal sepsis remains a healthcare crisis. PD1 neonatal mice endured experimental sepsis, in the form of cecal slurry (CS), and showed improved rates of survival compared to wildtype (WT) counterparts. End-organ injury, particularly of the lung, contributes to the devastation set forth by neonatal sepsis.

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Sepsis is characterized by a dysregulated host response to infection. Sepsis-associated morbidity/mortality demands concerted research efforts toward therapeutic interventions which are reliable, broadly effective, and etiologically based. More intensive and extensive investigations on alterations in cellular signaling pathways, gene targeting as a means of modifying the characteristic hyper and/or hypo-immune responses, prevention through optimization of the microbiome, and the molecular pathways underlying the septic immune response could improve outcomes.

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As the coronavirus disease-2019 (COVID-19) pandemic continues globally, high numbers of new infections are developing nationwide, particularly in the U.S. Midwest and along both the Atlantic and Pacific coasts.

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Sepsis-related mortality is driven by immune dysfunction. A bidirectional micro-organism-immune cell cross talks exists. Gut -T-cell crosstalk maintains innate immune cell/pathogen homeostasis.

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Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2)-associated viral infection (coronavirus disease 2019, COVID-19) is a virulent, contagious viral pandemic that is affecting populations worldwide. As with any airborne viral respiratory infection, surgical and non-surgical patients may be affected. Review and synthesis of pertinent English-language literature pertaining to COVID-19 infection among adult patients.

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Rates of infections with multi-drug-resistant organisms (MDROs) are increasing among critically ill patients. Among non-surgical patients, MDROs increase directly the risk of adverse secondary events including death. However, similar effects do not appear to occur among surgical patients.

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