2022
The extent to which geography explains one of trauma’s troubling trends: Insurance-based differences in appropriate interfacility transfer
Zogg CK, Schuster KM, Maung AA, Davis KA. The extent to which geography explains one of trauma’s troubling trends: Insurance-based differences in appropriate interfacility transfer. Journal Of Trauma And Acute Care Surgery 2022, 93: 686-694. PMID: 35293375, PMCID: PMC9470786, DOI: 10.1097/ta.0000000000003605.Peer-Reviewed Original ResearchConceptsNontrauma centersEmergency departmentMajor injuriesTrauma centerSignificant geographic variationInsurance-based differencesRisk-adjusted oddsLarge trauma centersNeighborhood socioeconomic disadvantageHierarchical logistic regressionInsured adultsTransfer patientsInsurance statusInterfacility transferStratified analysisED claimsUninsured adultsLevel IIISecondary objectiveTriage patternsDeprived populationsLogistic regressionInjurySocioeconomic disadvantageAdmission differences
2021
Increased mortality with resuscitative endovascular balloon occlusion of the aorta only mitigated by strong unmeasured confounding: An expanded analysis using the National Trauma Data Bank
Linderman GC, Lin W, Becher RD, Maung AA, Bhattacharya B, Davis KA, Schuster KM. Increased mortality with resuscitative endovascular balloon occlusion of the aorta only mitigated by strong unmeasured confounding: An expanded analysis using the National Trauma Data Bank. Journal Of Trauma And Acute Care Surgery 2021, 91: 790-797. PMID: 33951027, PMCID: PMC8547242, DOI: 10.1097/ta.0000000000003265.Peer-Reviewed Original ResearchConceptsAcute kidney injuryResuscitative endovascular balloon occlusionLower extremity amputationEndovascular balloon occlusionBalloon occlusionExtremity amputationTraumatic injuryTreatment weightingREBOA placementNational Trauma Data BankInverse probabilityPlacement of REBOATrauma Data BankSevere traumatic injuryMortality effectsUnmeasured confoundersNoncompressible torso hemorrhagePotent confounderTQIP dataTQIP databaseAortic injuryKidney injuryRetrospective studyInjury patternsBaseline variablesImproved outcomes using laparoscopy for emergency colectomy after mitigating bias by negative control exposure analysis
Linderman GC, Lin W, Sanghvi MR, Becher RD, Maung AA, Bhattacharya B, Davis KA, Schuster KM. Improved outcomes using laparoscopy for emergency colectomy after mitigating bias by negative control exposure analysis. Surgery 2021, 171: 305-311. PMID: 34332782, DOI: 10.1016/j.surg.2021.06.048.Peer-Reviewed Original ResearchConceptsOpen surgeryEmergency colectomyNational Surgical Quality Improvement Program dataQuality Improvement Program dataPostoperative septic shockLow-risk patientsSurgical site infectionPatients meeting criteriaColorectal emergenciesElective colectomyUnderwent laparoscopyHospital stayOverall morbidityNationwide registryAnastomotic leakColectomy casesConverted groupSeptic shockSite infectionPatient selectionBaseline variablesImproved outcomesLaparoscopic surgeryTreatment weightingColectomyAnticoagulation Is Associated with Increased Mortality in Splenic Injuries
Bhattacharya B, Becher RD, Schuster KM, Davis KA, Maung AA. Anticoagulation Is Associated with Increased Mortality in Splenic Injuries. Journal Of Surgical Research 2021, 266: 1-5. PMID: 33975026, DOI: 10.1016/j.jss.2021.04.002.Peer-Reviewed Original ResearchConceptsNon-ACS patientsSplenic injuryAC patientsMultivariable binary logistic regressionIndependent risk factorEffect of anticoagulationInjury Severity ScoreUnits of RBCsBinary logistic regressionHospital courseMedian LOSIncreased MortalitySeverity scoreRisk factorsWorse outcomesAnticoagulationSplenic surgeryAC groupPatientsHigh mortalityInjuryLogistic regressionMortalitySerious injuriesAngiography
2020
Survivors of gun violence and the experience of recovery.
O'Neill KM, Vega C, Saint-Hilaire S, Jahad L, Violano P, Rosenthal MS, Maung AA, Becher RD, Dodington J. Survivors of gun violence and the experience of recovery. Journal Of Trauma And Acute Care Surgery 2020, 89: 29-35. PMID: 32118821, DOI: 10.1097/ta.0000000000002635.Peer-Reviewed Original ResearchConceptsGun violenceQualitative research studyCommunity-based organizationsCommunity-based participatory research approachInterview transcript dataParticipatory research approachSense of safetyExperience of recoveryRepeat violenceConstant comparison methodMental health treatmentViolenceCommunity membersViolent recidivismDepth oneResearch approachBlack menSocial restrictionsHealth treatmentSuboptimal supportRecovery experiencesQualitative analysisThemesHigh-risk populationInterviews
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 management
2013
Pneumatosis Intestinalis Predictive Evaluation Study (PIPES)
DuBose JJ, Lissauer M, Maung AA, Piper GL, O’Callaghan T, Luo-Owen X, Inaba K, Okoye O, Shestopalov A, Fielder WD, Ferrada P, Wilson A, Channel J, Moore FO, Paul DB, Johnson S. Pneumatosis Intestinalis Predictive Evaluation Study (PIPES). Journal Of Trauma And Acute Care Surgery 2013, 75: 15-23. PMID: 23778433, DOI: 10.1097/ta.0b013e318298486e.Peer-Reviewed Original ResearchMeSH KeywordsAdultAge DistributionAgedAnalysis of VarianceCause of DeathCohort StudiesCombined Modality TherapyDigestive System Surgical ProceduresFemaleHospital MortalityHumansIncidenceLogistic ModelsMaleMiddle AgedPneumatosis Cystoides IntestinalisPredictive Value of TestsPrognosisRetrospective StudiesRisk AssessmentSeverity of Illness IndexSex DistributionSocieties, MedicalSurvival AnalysisTomography, X-Ray ComputedConceptsPathologic pneumatosis intestinalisPneumatosis intestinalisClinical prediction ruleIndependent predictorsPrediction ruleAcute renal failureRetrospective multicenter studySmall retrospective seriesStrong independent predictorRegression tree analysisAbsent bowelVasopressor needVasopressor useRenal failurePrimary outcomeClinical presentationRetrospective seriesBenign diseaseMechanical ventilationMulticenter studyTransmural ischemiaCase reportMedical historyClinical significanceProspective validation
2012
Compared to conventional ventilation, airway pressure release ventilation may increase ventilator days in trauma patients
Maung AA, Schuster KM, Kaplan LJ, Ditillo MF, Piper GL, Maerz LL, Lui FY, Johnson DC, Davis KA. Compared to conventional ventilation, airway pressure release ventilation may increase ventilator days in trauma patients. Journal Of Trauma And Acute Care Surgery 2012, 73: 507-510. PMID: 23019679, DOI: 10.1097/ta.0b013e31825ff653.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedContinuous Positive Airway PressureCritical CareDatabases, FactualFemaleFollow-Up StudiesHumansInjury Severity ScoreIntra-Abdominal HypertensionLength of StayLinear ModelsMaleMiddle AgedMultivariate AnalysisPulmonary Gas ExchangeRespiration, ArtificialRetrospective StudiesRisk AssessmentSurvival RateTime FactorsTrauma CentersTreatment OutcomeVentilator WeaningWounds and InjuriesConceptsAirway pressure release ventilationTotal ventilator daysVentilator daysHospital complicationsMechanical ventilationAIS scoreChest Abbreviated Injury Scale scoreAbbreviated Injury Scale scoreSpontaneous breathing trialAbdominal compartment syndromeAcute lung injuryAcute renal failureInjury Scale scoreStudy entry criteriaInjury Severity ScorePotential confounding factorsAPRV groupAPRV modeBreathing trialRescue therapyCompartment syndromeLung injuryRenal failureIndependent predictorsRetrospective review
2011
Risk of Venous Thromboembolism After Spinal Cord Injury: Not All Levels Are the Same
Maung AA, Schuster KM, Kaplan LJ, Maerz LL, Davis KA. Risk of Venous Thromboembolism After Spinal Cord Injury: Not All Levels Are the Same. Journal Of Trauma And Acute Care Surgery 2011, 71: 1241-1245. PMID: 22071925, DOI: 10.1097/ta.0b013e318235ded0.Peer-Reviewed Original ResearchConceptsLevel of SCISpinal cord injuryRate of VTEIndependent risk factorVenous thromboembolismRisk factorsHospital complicationsSpine injuriesCord injuryHigh thoracic spinal cord injuryHigh cervical spine injuryLikelihood of VTENational Trauma Data BankThoracic spinal cord injuryMultiple logistic regression modelException of pneumoniaHigh thoracic injuriesInjury Severity ScoreThoracic spine injuriesCervical spine injuryDeep vein thrombosisHigh cervical injuriesTrauma Data BankMultiple risk factorsTraumatic brain injury
2006
Increased CD4+ CD25+ T Regulatory Cell Activity in Trauma Patients Depresses Protective Th1 Immunity
MacConmara MP, Maung AA, Fujimi S, McKenna AM, Delisle A, Lapchak PH, Rogers S, Lederer JA, Mannick JA. Increased CD4+ CD25+ T Regulatory Cell Activity in Trauma Patients Depresses Protective Th1 Immunity. Annals Of Surgery 2006, 124: 179-188. PMID: 16998360, PMCID: PMC1856576, DOI: 10.1097/01.sla.0000239031.06906.1f.Peer-Reviewed Original ResearchConceptsCD4 T cellsT cell proliferationT cellsDay 1IL-10IFNgamma productionDay 7Inhibitory cytokine IL-10Patient CD4 T cellsCD4 T cell proliferationCD3/CD28 antibodiesTh1-type immunityCytokine IL-10Regulatory cell activityTh1 cytokine productionCytometric bead arrayT Regulatory Cell ActivityTh2-type cytokinesProtective Th1 immunityCell proliferationT cell activationActivation of cellsIncreased CD4Treg activityTreg suppression