2025
Antibiotics and Surgically Treated Acute Appendicitis, When, Where, and Why?
Hendrix A, Kammien A, Maung A, Battacharya B, Davis K, Schuster K. Antibiotics and Surgically Treated Acute Appendicitis, When, Where, and Why? Surgical Infections 2025 PMID: 39973176, DOI: 10.1089/sur.2024.264.Peer-Reviewed Original ResearchSurgical site infectionOrgan-space surgical site infectionBody mass indexElixhauser Comorbidity IndexEmergency appendectomyAcute appendicitisBi-variable logistic regression modelPredictive of surgical site infectionClean-contaminated abdominal surgeryIntra-abdominal infectious processIncidence of surgical site infectionOccurrence of surgical site infectionBroad-spectrum antibiotic treatmentOrgan-space infectionsPre-operative antibioticsHour of incisionBroad-spectrum antibioticsPredictive of infectionAdministration timePerforated appendicitisEmergency surgerySite infectionAbdominal surgerySurgical approachAntibiotic treatment
2023
Routine post-operative labs and healthcare system burden in acute appendicitis
Sznol J, Becher R, Maung A, Bhattacharya B, Davis K, Schuster K. Routine post-operative labs and healthcare system burden in acute appendicitis. The American Journal Of Surgery 2023, 226: 571-577. PMID: 37291012, DOI: 10.1016/j.amjsurg.2023.06.005.Peer-Reviewed Original ResearchConceptsHealthcare system burdenSystem burdenHealth care costsAppendicitis managementIncreased LOSUncomplicated AAAcute appendicitisRetrospective cohortClinical courseClinical variablesPatient populationMinimal comorbiditiesMultivariable modelingHealthcare costsCare costsPatientsLaboratory utilizationNational Health Expenditure AccountsLab utilizationLaboratory testingBurdenLaboratory testsAppendicitisComorbiditiesCohortAlcohol withdrawal syndrome in trauma patients: a study using the Trauma Quality Program Participant User File
Jones T, Bhattacharya B, Schuster K, Becher R, Kodadek L, Davis K, Maung A. Alcohol withdrawal syndrome in trauma patients: a study using the Trauma Quality Program Participant User File. Trauma Surgery & Acute Care Open 2023, 8: e001047. PMID: 37188153, PMCID: PMC10175962, DOI: 10.1136/tsaco-2022-001047.Peer-Reviewed Original ResearchAlcohol withdrawal syndromeAlcohol use disorderPositive blood alcohol concentrationHistory of AUDBlood alcohol concentrationParticipant User FileAdult patientsTrauma patientsWithdrawal syndromeAbbreviated Injury Scale headHigh-risk patient populationInjury scale headAdult trauma patientsPositive toxicology screenMultivariable logistic regressionRetrospective reviewRetrospective studyToxicology screenPatient populationTricyclic antidepressantsMAIN OUTCOMEAmerican CollegePatientsUse disordersUncommon occurrence
2022
Occult traumatic pneumothorax: Is routine follow up chest X-ray necessary?
Bhattacharya B, O'Connor R, Becher R, Schuster K, Davis K, Maung A. Occult traumatic pneumothorax: Is routine follow up chest X-ray necessary? Surgery In Practice And Science 2022, 9: 100073. PMID: 39845065, PMCID: PMC11749997, DOI: 10.1016/j.sipas.2022.100073.Peer-Reviewed Original ResearchChest X-rayRoutine chest X-rayInjury Severity ScoreClinical managementInitial trauma evaluationUrban trauma centerComputerized tomography scanPaucity of evidenceOccult pneumothoracesPneumothorax progressionAdult patientsTrauma centerClinical evolutionClinical symptomsInjury scoreMean ageTrauma evaluationSeverity scoreTomography scanPatientsInterventionPneumothoracesSymptomsAgeX-ray
2020
Urgent Care Centers Delay Emergent Surgical Care Based on Patient Insurance Status in The United States.
Hsiang WR, Wiznia D, Yousman L, Najem M, Mosier-Mills A, Jin G, Jain S, Khunte A, Davis KA, Forman HP, Schuster KM. Urgent Care Centers Delay Emergent Surgical Care Based on Patient Insurance Status in The United States. Annals Of Surgery 2020, 272: 548-553. PMID: 32932304, DOI: 10.1097/sla.0000000000004373.Peer-Reviewed Original ResearchConceptsUrgent care centersMedicaid patientsCare centerInsurance typePrivate patientsEmergent surgical careEmergent surgical casesUrgent surgical conditionIncarcerated inguinal herniaEmergency department referralsPatient insurance statusED referralsInsurance statusReferral ratesInguinal herniaSurgical conditionsSurgical careSurgical casesPatientsPrivate insuranceCliniciansStandardized scriptMedicaidCareEmergent conditionsSpirometry not pain level predicts outcomes in geriatric patients with isolated rib fractures.
Schuster KM, Sanghvi M, O'Connor R, Becher R, Maung AA, Davis KA. Spirometry not pain level predicts outcomes in geriatric patients with isolated rib fractures. Journal Of Trauma And Acute Care Surgery 2020, 89: 947-954. PMID: 32467465, DOI: 10.1097/ta.0000000000002795.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overEmergency Service, HospitalFemaleHand StrengthHospitals, RehabilitationHumansIntensive Care UnitsLength of StayMalePainPain ManagementPain MeasurementPatient DischargePatient TransferPredictive Value of TestsProspective StudiesRib FracturesSpirometryTrauma CentersTreatment OutcomeConceptsLength of stayIsolated rib fracturesNegative inspiratory forceUnplanned ICU admissionRib fracturesPain levelsDay 1ICU admissionInspiratory forceGrip strengthMedian LOSHospital day 1Expiratory volume 1Complete spirometryPain controlDischarge dispositionPulmonary functionEarly dischargeGeriatric patientsVital capacityMean ageSpirometry measuresPulmonary capacityLevel IVFEV1Hospital Variation in Geriatric Surgical Safety for Emergency Operation
Becher RD, Sukumar N, DeWane MP, Stolar MJ, Gill TM, Schuster KM, Maung AA, Zogg CK, Davis KA. Hospital Variation in Geriatric Surgical Safety for Emergency Operation. Journal Of The American College Of Surgeons 2020, 230: 966-973.e10. PMID: 32032720, PMCID: PMC7409563, DOI: 10.1016/j.jamcollsurg.2019.10.018.Peer-Reviewed Original ResearchConceptsStandardized mortality ratioHospital-level characteristicsGeneral surgery operationsGeriatric patientsEmergency operationHospital variationEmergency general surgery operationsMean standardized mortality ratioCalifornia State Inpatient DatabaseHospital-based mortalitySignificant hospital variationPatients 65 yearsSubstantial excess mortalitySurgery operationsState Inpatient DatabasesMixed effects logistic regression modelsCommon general surgery operationsLow-mortality outliersLogistic regression modelsPostoperative mortalityHospital deathOlder patientsInpatient DatabaseMortality outcomesNonelective operations
2019
Regionalization of emergency general surgery operations: A simulation study.
Becher RD, Sukumar N, DeWane MP, Gill TM, Maung AA, Schuster KM, Stolar MJ, Davis KA. Regionalization of emergency general surgery operations: A simulation study. Journal Of Trauma And Acute Care Surgery 2019, 88: 366-371. PMID: 31804419, PMCID: PMC7472889, DOI: 10.1097/ta.0000000000002543.Peer-Reviewed Original ResearchConceptsEmergency general surgeryHigh-volume hospitalsEGS careEmergency general surgery operationsCalifornia inpatient databaseCommon EGS operationsRisk-adjusted deathsSignificant survival benefitLow-volume hospitalsUmbilical hernia repairSmall bowel resectionHigh-mortality hospitalsGeneral surgery operationsRegional trauma systemEGS operationsBowel resectionAdult patientsPrimary outcomeSurvival benefitInpatient DatabaseHernia repairTrauma systemLevel IVGeneral surgeryCare managementHigh-performance acute care hospitals: Excelling across multiple emergency general surgery operations in the geriatric patient.
DeWane MP, Sukumar N, Stolar MJ, Gill TM, Maung AA, Schuster KM, Davis KA, Becher RD. High-performance acute care hospitals: Excelling across multiple emergency general surgery operations in the geriatric patient. Journal Of Trauma And Acute Care Surgery 2019, 87: 140-146. PMID: 31259872, PMCID: PMC7656193, DOI: 10.1097/ta.0000000000002273.Peer-Reviewed Original ResearchConceptsCommon EGS operationsEmergency general surgeryOlder patientsGeriatric patientsEmergency general surgery operationsEGS operationsCalifornia State Inpatient DatabaseGeneral surgery hospitalsPatients 65 yearsRisk-adjusted mortalitySurvival rates 1State Inpatient DatabasesGeneral surgery operationsClusters of hospitalsOperation typeHospital performanceEGS patientsSurgery HospitalInpatient DatabaseGroup of hospitalsGeriatric populationGeneral surgeryPatientsHospitalLevel IIITop-tier emergency general surgery hospitals: Good at one operation, good at them all.
DeWane MP, Sukumar N, Stolar MJ, Gill TM, Maung AA, Schuster KM, Davis KA, Becher RD. Top-tier emergency general surgery hospitals: Good at one operation, good at them all. Journal Of Trauma And Acute Care Surgery 2019, 87: 289-296. PMID: 31349347, PMCID: PMC6771423, DOI: 10.1097/ta.0000000000002367.Peer-Reviewed Original ResearchConceptsRisk-adjusted mortalityEGS hospitalsHospital risk-adjusted mortalityOperation typeEGS operationsCalifornia State Inpatient DatabaseGeneral surgery hospitalsHospital-level factorsAcute care hospitalsState Inpatient DatabasesAmerican Hospital Association databasePoor-performing hospitalsSystems of careLow-risk operationAssessment of mortalityAdult patientsCare hospitalSurgery HospitalInpatient DatabaseHospital characteristicsMultinomial logistic regressionMortality rateHospitalLevel IIIZ-scoreRethinking our definition of operative success: predicting early mortality after emergency general surgery colon resection
DeWane MP, Davis KA, Schuster KM, Maung AA, Becher RD. Rethinking our definition of operative success: predicting early mortality after emergency general surgery colon resection. Trauma Surgery & Acute Care Open 2019, 4: e000244. PMID: 31245613, PMCID: PMC6560481, DOI: 10.1136/tsaco-2018-000244.Peer-Reviewed Original ResearchPostoperative septic shockEarly deathSeptic shockEarly mortalityColon resectionSurgeons National Surgical Quality Improvement Program databaseNational Surgical Quality Improvement Program databaseNew-onset renal failureEmergency general surgery patientsQuality Improvement Program databaseGeneral surgery patientsRetrospective cohort studyImprovement Program databasePostoperative day 5Overall mortality rateMultivariable logistic regressionImmediate perioperative complicationsSurgical Risk CalculatorKaplan-Meier modelEmergent colectomyLate deathsVentilator dependencePerioperative complicationsPostoperative complicationsPreoperative factorsAmerican Association for the Surgery of Trauma (AAST) emergency general surgery guidelines gap analysis
Schuster K, Davis K, Hernandez M, Holena D, Salim A, Crandall M. American Association for the Surgery of Trauma (AAST) emergency general surgery guidelines gap analysis. Journal Of Trauma And Acute Care Surgery 2019, Publish Ahead of Print: &na;. PMID: 30768554, DOI: 10.1097/ta.0000000000002226.Peer-Reviewed Original ResearchConceptsEmergency general surgeryEGS diseasesSmall bowel obstructionAcute care surgeryCommon disease statesAAST gradeAmerican AssociationBowel obstructionAcute cholecystitisTrauma gradeCare surgeryAcute pancreatitisAdditional researchGeneral surgeryDisease processPatient careSurgeryLiterature searchDiseaseDisease statesAdditional literature reviewLow-quality researchDiagnosisInitial gap analysisThorough assessmentHospital Operative Volume and Quality Indication for General Surgery Operations Performed Emergently in Geriatric Patients
Becher RD, DeWane MP, Sukumar N, Stolar MJ, Gill TM, Becher RM, Maung AA, Schuster KM, Davis KA. Hospital Operative Volume and Quality Indication for General Surgery Operations Performed Emergently in Geriatric Patients. Journal Of The American College Of Surgeons 2019, 228: 910-923. PMID: 31005629, PMCID: PMC6582986, DOI: 10.1016/j.jamcollsurg.2019.02.053.Peer-Reviewed Original ResearchConceptsHospital operative volumeGeneral surgery operationsGeriatric patientsOperative volumeEmergency operationHospital volumeProbability of survivalEmergency general surgery operationsCalifornia State Inpatient DatabaseRetrospective cohort studySurgery operationsState Inpatient DatabasesHigher operative volumesAverage mortality riskOlder patientsCohort studyInpatient DatabaseGeriatric populationSurgical careSurgical qualityAmerican CollegeMortality riskOptimizing outcomesStandardized increasePatientsEvaluating mortality outlier hospitals to improve the quality of care in emergency general surgery.
Becher RD, DeWane MP, Sukumar N, Stolar MJ, Gill TM, Maung AA, Schuster KM, Davis KA. Evaluating mortality outlier hospitals to improve the quality of care in emergency general surgery. Journal Of Trauma And Acute Care Surgery 2019, 87: 297-306. PMID: 30908450, PMCID: PMC6660354, DOI: 10.1097/ta.0000000000002271.Peer-Reviewed Original ResearchConceptsStandardized mortality ratioOutlier hospitalsHospital variationMortality ratioStandardized mortalityEmergency general surgery operationsCalifornia State Inpatient DatabaseEGS operationsCommon EGS operationsSignificant hospital variationEmergency general surgeryHospital-level characteristicsHospital-level variablesSignificant excess mortalityGeneral surgery operationsState Inpatient DatabasesQuality improvement initiativesQuality of careHospital quality indicatorsNational Quality ForumEGS outcomesInpatient DatabaseExcess mortalityOnly hospitalEpidemiologic studiesEvaluation of Swallow Function Post-Extubation: Is It Necessary to Wait 24 Hours?
Leder SB, Warner HL, Suiter DM, Young NO, Bhattacharya B, Siner JM, Davis KA, Maerz LL, Rosenbaum SH, Marshall PS, Pisani MA, Siegel MD, Brennan JJ, Schuster KM. Evaluation of Swallow Function Post-Extubation: Is It Necessary to Wait 24 Hours? Annals Of Otology Rhinology & Laryngology 2019, 128: 619-624. PMID: 30841709, DOI: 10.1177/0003489419836115.Peer-Reviewed Original ResearchConceptsIntensive care unitSwallow evaluationDifferent intensive care unitsRe-intubation rateYale Swallow ProtocolMajority of patientsPost-extubation dysphagiaIntubation durationNosocomial pneumoniaPost extubationLonger hospitalizationCare unitProspective InvestigationSwallow ProtocolSwallowingHoursDysphagiaHospitalizationIntubationPneumoniaPatientsIncidenceEvaluationSymptomatic human immunodeficiency virus–infected patients have poorer outcomes following emergency general surgery
Sandler BJ, Davis KA, Schuster KM. Symptomatic human immunodeficiency virus–infected patients have poorer outcomes following emergency general surgery. Journal Of Trauma And Acute Care Surgery 2019, 86: 479-488. PMID: 30531208, DOI: 10.1097/ta.0000000000002161.Peer-Reviewed Original ResearchConceptsHIV/AIDS patientsHIV-negative patientsAsymptomatic HIV-positive patientsHIV-positive patientsActive antiretroviral therapyAIDS patientsAntiretroviral therapyHospital stayPostoperative complicationsHuman immunodeficiency virus-infected patientsEmergency general surgery proceduresHigher median total chargesImmune deficiency syndrome (AIDS) patientsHuman immunodeficiency virus (HIV) infectionEmergency general surgeryLonger hospital stayRetrospective cohort studyAcute renal failureHIV-negative controlsImmunodeficiency virus infectionVirus-infected patientsRecords of patientsUrinary tract infectionMedian total chargesNationwide Inpatient SampleHospital Volume and Operative Mortality for General Surgery Operations Performed Emergently in Adults
Becher RD, DeWane MP, Sukumar N, Stolar MJ, Gill TM, Maung AA, Schuster KM, Davis KA. Hospital Volume and Operative Mortality for General Surgery Operations Performed Emergently in Adults. Annals Of Surgery 2019, Publish Ahead of Print: &na;. PMID: 32675542, PMCID: PMC6803029, DOI: 10.1097/sla.0000000000003232.Peer-Reviewed Original ResearchHospital operative volumeSurgical emergencyAcute care hospitalsGeneral surgery operationsHospital volumeCare hospitalOperative volumeVolume thresholdEmergency general surgery operationsRetrospective cohort studyHigh-volume hospitalsUmbilical hernia repairRisk-adjusted mortalitySurgery operationsAverage mortality riskSurgical outcomes researchOperative mortalityAdult patientsCohort studyPublic health crisisHernia repairMortality riskTrauma surgerySurvival rateEmergency operationAmerican Association for the Surgery of Trauma (AAST) emergency general surgery guidelines gap analysis
Schuster K, Davis K, Hernandez M, Holena D, Salim A, Crandall M. American Association for the Surgery of Trauma (AAST) emergency general surgery guidelines gap analysis. Journal Of Trauma And Acute Care Surgery 2019, 1. DOI: 10.1097/01586154-900000000-98388.Peer-Reviewed Original Research
2018
Racial/Ethnic Disparities in Longer-term Outcomes Among Emergency General Surgery Patients
Zogg CK, Jiang W, Ottesen TD, Shafi S, Schuster K, Becher R, Davis KA, Haider AH. Racial/Ethnic Disparities in Longer-term Outcomes Among Emergency General Surgery Patients. Annals Of Surgery 2018, 268: 968-979. PMID: 28742704, PMCID: PMC5783796, DOI: 10.1097/sla.0000000000002449.Peer-Reviewed Original ResearchConceptsEmergency general surgery patientsNon-Hispanic whitesGeneral surgery patientsLong-term outcomesNon-Hispanic blacksNon-Hispanic AsiansMinority patientsMajor morbidityUnplanned readmissionSurgery patientsOlder adultsRisk-adjusted Cox proportional hazards modelsEthnic disparitiesCox proportional hazards modelDiagnostic categoriesRacial/Ethnic DisparitiesUS population agesProportional hazards modelNHB patientsNonagenarian patientsNHW patientsBACKGROUND DATAHospital's percentageMortality differencesMedicare dataOpioid dependency is independently associated with inferior clinical outcomes after trauma
Hsiang WR, McGeoch C, Lee S, Cheung W, Becher R, Davis KA, Schuster K. Opioid dependency is independently associated with inferior clinical outcomes after trauma. Injury 2018, 50: 192-196. PMID: 30342762, DOI: 10.1016/j.injury.2018.10.015.Peer-Reviewed Original ResearchConceptsNon-home dischargeOpioid-dependent patientsLength of stayInjury Severity ScoreOpioid dependencyVentilator daysMajor complicationsClinical outcomesPrescription abuseIllicit abuseLonger LOSChronic pain subgroupsMore ventilator daysOpioid-naïve patientsUse of opioidsAcademic Level IHigher readmission ratesInferior clinical outcomesChronic pain patientsOpioid subgroupsNaïve patientsAdult patientsPain subgroupsPatient demographicsReadmission rates
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