910 www.ccmjournal.org April2014•Volume42•Number4
Objective: ICU needs of nontrauma emergency general surgery
patientsarepoorlydescribed.Thisstudywasdesignedtocom-
pareICUutilizationofemergencygeneralsurgerypatientsadmit-
tedtoanacutecareemergencysurgeryservicewithothergeneral
surgerypatients.Ourhypothesisisthattertiarycareemergency
general surgery patients utilize more ICU resources than other
generalsurgicalpatients.
Design:Retrospectivedatabasereview.
Setting:Academic,tertiarycare,nontraumasurgicalICU.
Patients: All patients admitted to the surgical ICU over age 18
betweenMarch2004andJune2012.
Interventions:None.
Measurements and Main Results:Sixthousandninety-eightpatients
wereevaluated:1,053acutecareemergencysurgery,1,964general
surgery,1,491transplantsurgery,995facialsurgery/otolaryngology,
and595neurosurgery.Acutecareemergencysurgerypatientshad
statisticallysignifcantlylongerICUlengthsofstaythanothergroups:
acute care emergency surgery (13.5±17.4 d) versus general sur-
gery (8.7±12.9), transplant (7.8±11.6), oral-maxillofacial surgery
(5.5±4.2),andneurosurgery(4.47±9.8)(all p < 0.01). Ventilator
usage, defned by percentage of total ICU days patients required
mechanicalventilation,wassignifcantlyhigherforacutecareemer-
gencysurgerypatients:acutecareemergencysurgery73.4%versus
generalsurgery64.9%,transplant63.3%,oral-maxillofacialsurgery
58.4%, and neurosurgery 53.1% (all p < 0.01). Continuous renal
replacementtherapyusage,defnedaspercentofpatientsrequiring
this service, was signifcantly higher in acute care emergency sur-
gerypatients:acutecareemergencysurgery10.8%versusgeneral
surgery 4.3%, transplant 6.6%, oral-maxillofacial surgery 0%, and
neurosurgery 0.5% (all p < 0.01). Acute care emergency surgery
patientsweremorelikelyinterhospitaltransfersfortertiarycareser-
vicesthangeneralsurgeryortransplant(24.5%vs15.5%and8.3%
respectively,p<0.001foreach)andmorelikelyrequiredemergent
surgery(13.7%vs6.7%and3.5%,allp<0.001).Chroniccomor-
bidities were similar between acute care emergency surgery and
generalsurgery,whereastransplanthadfewer.
Conclusions:Emergencygeneralsurgerypatientshaveincreased
ICUneedsintermsoflengthofstay,ventilatorusage,andcon-
tinuous renal replacement therapy usage compared with other
services,perhapsduetothehigherpercentageoftransfersand
emergent surgery required. These patients represent a distinct
population. Understanding their resource needs will allow for
better deployment of hospital resources. (Crit Care Med 2014;
42:910–917)
Copyright©2013bytheSocietyofCriticalCareMedicineandLippincott
Williams&Wilkins
DOI: 10.1097/CCM.0000000000000099
1
DepartmentofSurgeryandPrograminTrauma,RAdamsCowleyShock
TraumaCenter,UniversityofMarylandSchoolofMedicine,Baltimore,MD.
2
DepartmentofAnesthesiologyandPrograminTrauma,RAdamsCowley
ShockTraumaCenter,UniversityofMarylandSchoolofMedicine,Balti-
more,MD.
3
Department of Clinical Effectiveness, University of Maryland Medical
Center,Baltimore,MD.
4
Department of Anesthesiology, University of Maryland School of Medi-
cine,Baltimore,MD.
ThisworkwasperformedattheUniversityofMarylandMedicalCenterand
theUniversityofMarylandSchoolofMedicine.
Dr. Lissauer received support for travel (surgery section travel grant to
presenttheposterofthisworkattheSocietyofCriticalCareMedicine
42ndCriticalCareCongress)andisemployedbyShockTraumaAssoci-
ates,PA,andtheUniversityofMarylandFacultyPhysicians.Hisinstitution
receivedgrantsupportfromBraunCorp.(researchcontracttostudythe
effectofendotoxinremovalviatheBRAUNS.A.F.E.BTtherapydevice),
Astute Medical (research contract to study the early diagnosis of acute
kidneyinjury),andPfzerCorp.(researchcontracttostudyapixabaninthe
treatmentofdeepveinthrombosis/pulmonaryembolus).Dr.GalvagnoJr
served as a board member with the American Board of Anesthesiology
(CriticalCareMedicinetestwritingcommittee);isemployedbytheUni-
versityofMarylandFacultyPhysiciansandShockTraumaAssociates,PA;
andreceivedsupportfordevelopmentofeducationalpresentationsfrom
theSocietyofCriticalCareMedicine(AirwayWebinar,2013)andUnited
StatesAirForceReserve(ReservistinUnitedStatesAirForce.Hisinstitu-
tionreceivedgrantsupport:ECI12052(Co-I,Ultrasonographicmeasures
ofvolumeresponsiveness)andNCT01545232(Pragmatic,Randomized
OptimalPlateletsandPlasmaRatios).Dr.Rock’sinstitutionreceivedsup-
port from the National Institutes of Health. Dr. Narayan is employed by
theShockTraumaAssociates,PA,andtheStateofMaryland.Dr.Shahis
employedbytheShockTraumaAssociates,PA,andFacultyPhysicians.
Ms.SpencerisemployedbytheUniversityofMarylandMedicalCenter.
Dr.HongisemployedbytheUniversityofMarylandAnesthesiologyAsso-
ciates,PA,andreceivedgrantsupportfromtheAmericanHeartAssocia-
tionandtheUnitedStatesAirForce/UniversityofMarylandCooperative
AgreementAward.Dr.DiazconsultedforAcuteInnovations,LifeCell,and
Synthesandprovidedexperttestimonyforseveralorganizations.
Forinformationregardingthisarticle,E-mail:mlissauer@umm.edu
Increased ICU Resource Needs for an Academic
Emergency General Surgery Service*
Matthew E. Lissauer, MD, FACS
1
; Samuel M. Galvagno Jr, DO, PhD, MS
2
;
Peter Rock, MD, MBA, FCCM
2
; Mayur Narayan, MD, MPH, MBA
1
; Paulesh Shah, MD
1
;
Heather Spencer, RN, MS, MBA
3
; Caron Hong, MD
4
; Jose J. Diaz, MD, FACS, FCCM
1