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15.09.12 1 Forfatter Prosjektittel FORSVARET Forsvarets logistikkorganisasjon 15.09.12 1 FORSVARET Forsvarets sanitet Helse for stridsevne Militære traumesystem, en forbedring av militær traumatologi Bent-Åge Rolandsen Avdelingsoverlege Sykehusgruppen FFSS/FSAN

Internasjonale og egne erfaringer i militær traumatologi fra â

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15.09.12 1 Forfatter Prosjektittel

FORSVARET Forsvarets logistikkorganisasjon

15.09.12 1

FORSVARET Forsvarets sanitet

Helse for stridsevne

Militære traumesystem, en forbedring av militær traumatologi

Bent-Åge Rolandsen Avdelingsoverlege Sykehusgruppen FFSS/FSAN

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Innledning  

 •  Forskjell  militær  og  sivil  traumatologi  

•  Hva  skal  prehospitalt  personell  beherske    •  Hva  skal  militære  kirurgiske  team  mestre    •  Traumesystem  

–  Sivile  –  Militære  

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Militær  traumatologi  

•  Skademekanisme  – Penetrerende  versus  stump  skademekanisme  

 •  Militært  traumesystem  

– Betjene  flere  nivåer  – 4R  

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Militær  traumatologi  

•  Medisinskfaglig  kompetanse    

– Spesialkompetanse  på  eksplosjons-­‐  og  prosjekElskader  

 – Bred  generell  kompetanse  pga  begrenset  Elgang  El  spesialister  

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Militær  traumatologi  •  Militært  miljø  -­‐  austere  environment  

– Behov  for  kunnskap  utover  det  medisinske  i  skarpe  operasjoner  

– Beherske  kommunikasjon  med  annet  militært  personell  i  grensesniGet  mellom  det  rent  operaEve  og  det  fagmedisinske  

– Beherske  tjeneste  som  medisinsk  fagpersonell  i  miljøer  som  krever  stor  krysskunnskap  og  robusthet.  

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Hva  skal  prehospitalt  personell  beherske  ?  

Ulike  krav  for:    •  Vanlig  soldat,  Sanitetssoldat  •  Hjelpeplass  •  Evakuering  (Bakke  eller  luN)  •  ABCDE  /  CABcDE/  MARCH  

 

ABCDE/CABcDE/MARCH  •  LuNvegsproblemaEkk  •  Trykkpneumothorax  •  Ekstremitetsblødninger  •  Hindre  hypotermi  

•  Dokumentasjon  

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 Hvilke  kirurgiske/ortopediske  

prosedyrer  må    beherskes  av  et  norsk  kirurgisk  team?  

 

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Kirurgisk  team    •  Spesialist  i  generell  kirurgi  •  Spesialist  i  ortopedisk  kirurgi  •  Spesialist  i  anestesiologi  •  Anestesisykepleier  •  To  operasjonssykepleiere  

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Abdominal/vascular  procedures  

Thoracic  procedures   Orthopaedic  procedures   Neurosurgical  procedures  

DCS  laprotomy  +/-­‐  aorEc  clamping    

Rapid  emergency  thoracotomy  

Rapid  amputaEon,  SoN  Essue  DCS  

4-­‐into-­‐1  burr  hole  technique  

Arterial  ShunEng  Vessel  repair/lig.  

Pulmonary  tractotomy   Fracture  control  External  FixaEon  

Intracranial  haematoma  evac.  

Liver  laceraEon  packing   Circum-­‐hilar  rotaEon  for  lung  haem.  contr.  

Compartment  syndrome  prevenEon  

Decompressive  craniectomy    

InfecEon  prevenEon  IntesEne  perforaEon  control  

Non-­‐anatomically  stapled  lung  resecEon,  lobectomy  

Stabilze  pelvic  ring  facture,  pelvic  packing  bleeding    

Intracranial  bleeding—emergent  arrest  and  control  

Drainage  pancreaEc  bed   Skin  staple  closure  of  cardiac  wounds  

JuncEonal  zone  bleed  control  

CNS  infecEon  control    

DCS  Urological  procedures  

En-­‐masse  closure  of  chest  wall  muscles  

Wound  management  InfecEon  prevenEon  

CNS  shrapnels  removal  

Abdomen  temporarily  closed  

Patch  closure  of  thoracic  wounds  

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Anestesiologisk  kompetanse  

•  Vanskelig  luNvei  •  Plan  for  ”vascular  access”  •  Traumeanestesi  •  Intensiv  behandling  •  Damage  control  resuscitaEon  •  Indikasjon  og  gjennomføring  av  fullblodstransfusjon  

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Traumesystem  

Wars  have  always  promoted  advances  in  trauma  care  because  of  the  concentrated  exposure  of  military  hospitals  to  large  numbers  of  injured  people  during  a  relaEvely  short  span  of  Eme.    Dr  Michael  Debakey  (Basert  på  erfaringer  fra  2.  verdenskrig)  

     

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Hva  er  et    traumesystem?  

Organisert  plan  for  behandling  av  akuG  skadde  pasienter  i  en  definert  region  eller  populasjon  

 MÅL:  

•  OpEmal  sjanse  for  overlevelse  •  Minimalt  funksjonstap  

   

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Sivile  traumesystem    •  Erkjennelse  i  USA  at  skader  og  ulykker  var  et  folkehelse  problem    

•  Kombinert  med  erfaringer  fra  saniteten  i  Vietnamkrigen  

•  Innføring  av  traumesystem  i  USA  – Redusert  mortalitet  15-­‐20  %  

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Hva  er  et  traumesystem?  

 •  Fundamentet  er:  

– Prehospital  tjeneste  – Sykehus  – Rehabilitering    

•  I  en    fungerende  behandlingskjede.  

 

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Hva  er  et  traumesystem?  

 •  Traumeregister  •  Overføringskriterier  •  Kliniske  retningslinjer  •  Trening/opplæring  •  Traumemøter/M&M  møter  

 

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Norway87 concluded that for trauma patients, advanced airwaymanagement and thoracic drainage performed by a physicianincreased survival. A Danish series of studies on endotrachealintubation performed on-scene, concluded that while the proce-dure is widespread it requires skills that are restricted to speciallytrained physicians.25,26,54 The presence of an anaesthesiologistprolonged median on-scene time by 1 min, and in cases in whichendotracheal intubation was performed, by 7.5 min.63 A survey ofNorwegian pre-hospital anaesthesiologists128 also confirmed theneed for training to maintain airway management skills. Recentlythe Scandinavian Society of Anaesthesiology and Intensive Careproposed a flow chart for airway management in the field,stratified by the provider’s level of skill.12

The northernmost areas of Scandinavia face special chal-lenges.126,163 A survey from northern Norway describes theoperational and medical characteristics of 147 missions in theBarents Sea,46 with one-third of the search and rescue missions

carried out in darkness, transport times of up to 425 min, andpatients often severely injured; a scenario not unlike the‘‘tyranny of distance’’ describing rural trauma management inAustralia.29

For decades, pre-hospital fluid therapy has been aimed at theimmediate restoration of normovolaemia.139 More recent experi-mental and clinical research has questioned this approach.107,139

Scandinavian researchers have contributed to this debate,69,70,108–

113,130,164 and treatment protocols have been called for.107,129 InStockholm a study of 102 hypotensive trauma patients found thatthe initiation and form of fluid therapy was irrespective of the typeand severity of the injury.148 Further, they demonstrated a lack ofemployment of treatment protocol, and that on-scene timeexceeded recommendations.148 Scandinavian guidelines for mana-ging trauma patients with massive bleeding were recentlypublished42 based on the existing literature and consensus amongthe experts in the field. The guidelines include a step-wiseframework and differential approach for pre-hospital triage andmanagement of the haemorrhaging trauma patient.42

Fig. 1. The inclusive trauma system. The components and their interactions in an inclusive trauma system. The core operational components constitute an organised systemfrom the site of injury to rehabilitation. All levels of resources are employed according to the clinical requirements. The outer administrative framework represents funding,assessment and continual development of the system. Adapted with permission from the Health Resources and Service Administration, US Department of Health and HumanServices.152

Fig. 2. Mechanism of injury in severe and fatal trauma. Typical distribution ofmechanism of injury extrapolated from Søreide et al.145 and Hansen et al.51

Fig. 3. Distribution of TBI mortality rates in Scandinavia. Data were obtained fromreferences.5,32,35,133

T. Kristiansen et al. / Injury, Int. J. Care Injured 41 (2010) 444–452446

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6 http://www.cs.amedd.army.mil/dasqaDocuments.aspx?type=1

Transforming US Army Trauma Care: An Evidence-Based Review of the Trauma Literature

Table 1. Evidence-based lessons about trauma care derived from the literature.

Civilian Trauma Systems 1. Trauma systems improve mortality.4-7 2. Integration of designated trauma centers within a state improves outcomes.4-7 3. Initial treatment by ATLS-trained physicians at rural level III trauma centers decreases preventable deaths.8-10 4. Initial transport to a rural level III trauma center with only an ATLS physician does not increase mortality and may

decrease mortality in rural areas even with delays of up to 4 hours to reach the level I trauma center.6,11-13 5. RTS <6.00 and hypotension in patients with chest or abdominal injury predicts a need for DCS prior to transfer to a

level I center.14

Military Trauma Systems 1. Battlefields and tactics change over time and modern battlefields may contain multiple types of conflict

simultaneously within the same battle-space.15-18 2. Combat trauma system contingency planning is important to remain prepared for future complex battlefields.1 3. Proper utilization of surgical resources within a trauma system improves survival within the system and up to 50% of

potentially survivable injuries are surgical.19,20 4. The FST is proven in rapid, modern maneuver warfare and with modifications has succeeded in providing surgical and

nonsurgical trauma care for stability and counterinsurgency operations in our current theaters.21 5. Current Army trauma system surgical and presurgical (ATLS) assets need increased modularly and flexibility to rapidly

tailor trauma care for changing conflict types within a single, complex battlefield.1,16-18,22

Presurgical Trauma Care 1. Prehospital paramedic care decreases mortality and increases trauma system efficiency.23 2. A large portion of trauma patients can be treated or temporized by EM physicians performing ATLS level LSIs.24-26 3. EM physicians are currently underutilized within the Army trauma system.24,25 4. Using EM and highly-trained ATLS physicians in the presurgical portion of the trauma system can increase system

efficiency and resource utilization.24-27 5. Certain patients always need early surgeon involvement for life-saving surgery (hypotension with penetrating neck and

torso trauma).27,28

Medical Evacuation Times 1. The golden hour was a “best guess” rule-of-thumb created 30 years ago and was not based on data.29 2. Combat trauma deaths likely occur in a bimodal distribution with the first peak of death from immediately after

wounding to 15 minutes and the second peak at 60 to 180 minutes.19,30-32 3. The time distribution of death is highly dependent on type of injury and not all injuries produce temporal-based peaks

of death (specifically severe head injury).32 4. High-level enroute care may decrease mortality despite longer evacuation times.33 5. Prehospital care in the military system is divided into ATLS facility care and surgical facility care.33,34 6. By reviewing TPtoA and TPtoS data, we can begin to describe which injuries require rapid initial ATLS care versus

surgical care.32,35,36

Medical Evacuation System 1. Advanced care (paramedic-level and above) during transport of the severely wounded improves survival.37-39 2. A template for each type of conflict with specific MEDEVAC triage criteria to determine appropriate enroute and

presurgical treatment is needed.22,34,39 3. Research is needed to determine the physiologic and anatomic parameters for appropriate enroute treatment and

triage (ATLS versus surgical).39-41

GLOSSARY ATLS - advanced trauma life support MEDEVAC - military medical evacuation DCS - damage control surgery RTS - revised trauma score EM - emergency medicine TPtoA - time from point-of-injury to the first ATLS facility FST - forward surgical team TPtoS - time from point-of-injury to first surgical facility LSIs - lifesaving interventions

Sivile  traumesystem  

Transforming US Army Trauma Care: An Evidence-Based Review of the Trauma Literature LTC Kyle N. Remick; LTC James A. Dickerson II; LTC Shawn C. Nessen;COL Robert M. Rush; COL Greg J. Beilman; The united states army medical department journal, july-september 2010

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Hva  er  et  militært  traumesystem?  

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Militært  traumesystem  

 •  USA  innførte  deGe  i  2004/2005  

– Basert  på  erfaringer  fra  1.  Gulmrig  (1992)  – Erkjennelse  av  at  sivilt  traumesystem  var  mye  bedre  

•  Storbritannia  

 

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Joint  Theater  Trauma  System  That  every  military  member  injured  in  the  theater  of  operaEons  has  the  opEmal  chance  for  survival  and  maximal  potenEal  for  funcEonal  recovery      •  Innført  i  2005  

– Right  paEent  – Right  place  – Right  Eme  – Right  care  

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JTTS  komponenter  

 •  prevenEon,  •  pre-­‐hospital  integraEon  •  educaEon  •  Leadership  and  communicaEon  •  Quality  improvement/performance  improvement  •  research  •  informaEon  systems.    

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Storbritannia  

when evaluating the performance of personnel andvehicle protective systems. There is close liaison withthe attending scientific adviser that allows new pat-terns of wounding and the impact of changes inweaponry to be rapidly identified.

(b) Hospital exerciseImmediately prior to deployment, the entire field hos-pital undertakes a validation exercise in a replica fieldhospital in York. This exercise (called hospital exercise;HOSPEX) can assess an individual’s performance(microsimulation techniques), a team’s performancesuch as the trauma team or operating team (meso-simulation techniques) and the hospital’s globalperformance in response to continued bursts of casual-ties (macrosimulation techniques; [56]). Anonymizedcasualty data from JTTR are used to construct thescenarios. The use of genuine and contemporarycase scenarios, played out in real time with simulatedlive casualties (former soldiers who have sufferedamputations) and in a realistic duplicate environment,generates the necessary face and content validity forthe exercise. Importantly, this inspires confidence inthose deploying for the first time and decreases theinitial shock of encountering critical combat woundedin the field hospital.

(c) Joint Theatre Trauma RegistryThe JTTR is derived from a composite of threeindependent databases:

— major trauma audit for clinical effectiveness(MACE);

— medical emergency response team (MERT); and— operational emergency department attendance

register (OpEDAR).

JTTR’s principal purpose is a quality assurance systemfor the management of major trauma from point ofwounding (POW) to rehabilitation. It is a tool to sup-port continuous detailed clinical audit. Data from allthree streams provide the full picture of all significantlyinjured casualties from time of injury, throughpre-hospital treatment and evacuation, to the careadministered at the field hospital. For UK militarycasualties, the continuing pathway of air evacuationto UK and definitive treatment in UK is also captured.The MERT database is an electronic record of patientstreated by the UK’s MERT (physician-led helicopter-borne pre-hospital team). As the MERT will deliverpatients to treatment facilities other than the UKfield hospital, their information will not appear inMACE unless they enter the UK system again laterin their course—additionally, patients with illnessrather than injury may be transported by MERT, butwill not appear on MACE. OpEDAR captures allpatients (injury and illness) attending the emergencydepartment of a UK field hospital [57]: patients canbe on MACE without appearing on OpEDAR ifthey receive their initial treatment in a non-UK fieldhospital, prior to evacuation to Birmingham.

An important part of the CG process is providingfeedback: where outcome is unexpectedly positive(the unexpected survivor), then practice is praisedand reinforced, but where practice is regarded as sub-optimal, the area for improvement is highlighted,organizational change is instituted and compliance ismonitored. Formal academic review of performanceduring a specified period of an operation is used toreview and compare patterns of activity and clinicaleffectiveness [58–61]. JTTR has also been used tosupport academic evaluation of complex organi-zational challenges such as the effectiveness oftourniquets [62], the effectiveness of battlefield

Joint Theatre Trauma Registry

deployed TNC

ADMEM TNC—role 4 —post-mortem—DMRC

deployed TNC Trg—MACE cse—ADMEM attachment—HOSPEX

critical event reporting (PJHQ, HQSG)clinical effectiveness reportsDstl: drive research requirementsforce protection requirementsJMC: drive training requirements

advice and feedbackelectronic data forms

Figure 4. The military trauma CG process.

Review. Trauma scoring and governance in the DMS R. J. Russell et al. 177

Phil. Trans. R. Soc. B (2011)

on March 2, 2011rstb.royalsocietypublishing.orgDownloaded from

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Resultat  

from the two Websites for the major categories of interest forIraq and Afghanistan.

Table 3 shows KIA, DOW, and CFR rates for threeconflicts using the most comparable numerator and denomi-nator figures for each (i.e. ground troops only and the abilityto distinguish RTD) and using the definitions referred toabove.

The case fatality rate (CFR) progressively decreasedover the conflicts WWII ! Vietnam ! Iraq and Afghanistan;p " 0.0001 between conflicts). A similar pattern was noted in%KIA (WWII ! Vietnam ! Iraq and Afghanistan; p "0.0001 between conflicts). Understandably a different patternis seen for %DOW. There was an increase in %DOW duringthe most recent conflict (Iraq and Afghanistan ! WWII !Vietnam; p " 0.004 between conflicts). Interestingly, bothDOW and KIA are higher in Afghanistan than Iraq (p "0.05).

Data were analyzed using SAS version 8.1 (SAS InstituteInc., Cary, NC). To compare among and between conflicts forthe categorical variable Live/Die Chi-square tests were used.A Bonferroni adjustment was used for multiple comparisonsand significance level is set at 0.05.

DISCUSSIONIn the present conflict, now entering its fourth year,

case fatality rates (Table 3) for combat injury amongUnited States military personnel in Afghanistan and Iraq isindeed roughly half that of Vietnam and one-third that ofWorld War II, (p " 0.01). It is not unreasonable to judgethat some of this reduction may be a result of widespreaduse of improved body armor, because chest wounds arerelatively decreased in preliminary data when comparedwith previous conflicts.20 Particularly for the reduction in%KIA, (p " 0.001), additional contributing factors mayinclude the successful transition of products from the 10year DoD research program on improved hemorrhage con-trol and increased focus on prehospital Tactical CombatCasualty Care training,22 coupled with rapid evacuation.Some degree of reciprocity between KIA and DOW ratesis expected6,21 as many of the more severly injured casu-alties who in the past would have died before reachingMTF care (KIA), now die after rapid evacuation to MTFs,changing their classification to DOW. The observed in-

crease (p " 0.01) in DOW rates would likely be higher ifnot for the improvements in surgical management utilizingdamage control techniques, improved ICU care, earlierrecognition of abdominal compartment syndrome, liberaluse of fresh whole blood and recombinant factor VIIa(rFVIIa), among other new techniques, and institution of atheater-wide trauma systems approach. Interestingly, thecalculation of DOW for Afghanistan reveals a rate of 6.7%while in Iraq it is 4.7 %, (p " 0.05), while the KIA rate is18.7 in Afghanistan and in Iraq it is 13.5% (p " 0.05).Only by using common definitions and consistent equa-tions can these comparative rates be determined. The causeof the differences between theaters is unclear. Smallernumbers overall, different application of DOW, KIA anddead on arrival definitions, wounding at altitude, muchlonger evacuation distances, different applications of bodyarmor and different injury mechanisms are all probablyimportant variables. However, these and other hypothesescannot be tested until wound severity data are compiled ina fashion that permits appropriate case-control compari-sons. Taken together, these and other changes in practiceimplemented on the current battlefield have resulted in astatistically and clinically significant decrease in the the-ater wide, four year CFR compared to previous conflicts,(p " 0.001).

In both WWII and Vietnam, of those Soldiers who died,88% were KIA and 12% DOW.4,23 Because of the significantdecrease in the KIA rate in the current war, a greater per-centage of patients are dying after reaching a MTF. In Iraqand Afghanistan of those who die, 23% are DOW and 77%KIA. Though the CFR rate has decreased, the near doublingof those patients now dying at the MTF’s emphasizes theneed to focus resources and research to aid these casualties.

Thoughtful review of KIA, DOW, and CFR rates forcombat trauma are important for optimal medical planning,training, research, and resource allocation. The need to bringcombat casualty epidemiology to a civilian standard requiresutilization of both technology and organization that are rou-tinely utilized in the United States civilian traumacommunity.24,26 Thanks to efforts by the Deputy AssistantSecretary of Defense for Health Affairs and the SurgeonsGeneral of each of the armed services, raw data appropriatefor this effort are now being collected in three separate

Table 3 Comparison of Proportional Statistics for Battle Casualties, U.S. Military Ground Troops, World War II,Vietnam, Afghanistan/Iraq

WW II8,9 Vietnam4 Total Iraq/Afghanistan1,2 Afghanistan1,2 Iraq1,2

% KIA 20.2a 20.0b 13.8c 18.7 13.5*% DOW 3.5a 3.2b 4.8c 6.7 4.7*CFR 19.1a 15.8b 9.4c 16.4 9.1*

Comparisons between WWII, Vietnam, and Total Iraq/Afghanistan, a,b,c, " 0.05.Comparison between Iraq and Afghanistan * p " 0.05.% KIA # 100 $ KIA/(WIA % RTD) & KIA; % DOW # 100 $ DOW/(WIA % RTD); CFR # 100 $ (KIA & DOW)/(WIA & KIA).

The Journal of TRAUMA! Injury, Infection, and Critical Care

400 February 2006flicts described in this study, these 3 major causes of deathcontinue to be present in Afghanistan and Iraq.26,30,31 Hol-comb et al30 identified opportunities to improve care in12 of 82 deaths (15%) among Special Operations Forces.In a review of 982 deaths, Kelly et al31 reported 24% ofdeaths as potentially survivable, with opportunity to im-prove care equally distributed between prehospital andhospital settings. Although it cannot be absolutely quan-tified as resulting from their casualty response system,an overall case fatality rate of 7.6 coupled with the elimi-nation of prehospital preventable deaths validates to anotable degree the Ranger training approach (Table 6).

Training for TCCC was initiated by the Rangers in 1997and formed the basis for 2 programs of instruction, RangerFirstResponder (RFR)andCasualtyResponseTraining forRangerLeaders.12,16-18Becausecareunderfiremustbesimple,direct, and conditioned into the provider, RFR emphasizesrepetitive hands-on application of TCCC lifesaving skills

incorporated into realistic scenario-based learning. Every-one on the battlefield, not just medics, has the potential tobe a casualty or to be the first person to encounter a casu-alty; thus,RFRismandatedforallpersonnel in theregimentregardless of their role.18 This concept is best illustrated bythe fact that 26% of hemorrhage control interventions inthis study, including 42% of tourniquets, were applied bynonmedical personnel at the point of wounding, probablydecreasing the necessity for additional prehospital resus-citationandcertainlycontributing tonopreventabledeathsdue to extremity hemorrhage exsanguination.

Because the tactical commander manages all re-sources dedicated to preparing for and completing a mis-sion, it is this nonmedical leader who is ultimately re-sponsible for the prehospital casualty response system.This concept differentiates RFR and Casualty ResponseTraining for Ranger Leaders from other medical pro-grams. The goal is to educate all on the operational con-

Table 2. Comparison of Proportional Statistics for Battle Injuries in the 75th Ranger Regiment vs Total US Military Ground TroopsBetween October 1, 2001, and March 31, 2010

Statistic

75th Ranger Regiment(n=419)

US Military Ground Troops(n=43 311)

Overall OEF OIF Overall OEF OIF

RTD, %a 40b 46 36b 56 44 58KIA, %c 10.7b 12.5 9.5b 16.4 16.5 16.4DOW, %d 1.7b 2.2 1.4b 5.8 4.7 6.0CFRe 7.6 8.4 7.1 10.3 12.4 10.0

Abbreviations: CFR, case fatality rate; DOW, died of wounds; KIA, killed in action; OEF, Operation Enduring Freedom; OIF, Operation Iraqi Freedom;RTD, returned to duty in less than 72 hours.

aThe RTD percentage (RTD/wounded in action!100) defines minor wounds.26 The differences between overall and OIF values for the 2 groups werestatistically significant ("2

1=11.6, P# .001; and "21=12.8, P# .001), indicating fewer minor wounds in the Ranger populations given the same period. However, the

difference between OEF values was not statistically significant ("21=0.058, P=.81).

bStatistically significant (P# .05).cThe KIA percentage ([KIA/(KIA$wounded in action!RTD)]!100) provides a potential measure of weapon lethality, effectiveness of prehospital medical care,

and availability of tactical evacuation.26 All Ranger values appear to be lower compared with the US military ground troops. The differences between overall andOIF values for the 2 groups were statistically significant ("2

1=4.3, P=.04; and "21=4.2, P=.04). However, the difference between OEF values was not statistically

significant ("21=0.63; P=.43).

dThe DOW percentage ([DOW/(wounded in action!RTD)]!100) provides a potential measure of the precision of initial prehospital triage and care, optimizationof evacuation procedures, and application of a coordinated trauma system as well as the effectiveness of medical treatment facility care.26 Although all Rangervalues appear to be lower compared with US military ground troops, only the differences in overall and OIF values were statistically significant ("2

1=5.9, P=.02;and "2

1=4.2, P=.04). The OEF value was not statistically significant ("21=0.71, P=.40). Also of note, for US military ground troops, the DOW percentage has

remained less than 5% during the past half century; however, in this study it was found to be higher overall and in OIF.eThe CFR ([(KIA$DOW)/(KIA$wounded in action)]!100) provides a potential measure of overall battlefield lethality in a battle injury population.26 Although

all Ranger values appear to be lower compared with US military ground troops, none were found to be statistically significant ("21=2.5, P=.11; "2

1=1.9, P=.17; and"2

1=1.6, P=.21).

Table 3. Hemorrhage Control Interventions Administered by 75th Ranger Regiment Personnel by Provider Level During Care UnderFire and Tactical Field Care Phases of Tactical Combat Casualty Care Between October 1, 2001, and March 31, 2010a

Intervention

Care Provider Level, No.

Total, No.RFR Nonmedic EMT Medic Medical Officer

Pressure dressingb 33 16 136 21 206Gauze dressing 28 16 121 23 188Tourniquetc 27 10 49 3 89Hemostatic dressingd 3 1 26 7 37Total 91 43 332 54 520

Abbreviations: EMT, emergency medical technician; RFR, Ranger First Responder.aNonmedical personnel provided 26% (134/520) of all hemorrhage control interventions and 42% (37/89) of all tourniquets.bPrimarily Emergency Trauma Dressings (North American Rescue, LLC, Greer, South Carolina).cPrimarily Combat Application Tourniquets (Composite Resources, Rock Hill, South Carolina).dPrimarily HemCon bandages (HemCon Medical Technologies, Inc, Portland, Oregon) and Combat Gauze (Z-Medica Corp, Wallingford, Connecticut).

ARCH SURG/ VOL 146 (NO. 12), DEC 2011 WWW.ARCHSURG.COM1354

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