[Emergency room activation due to trauma mechanism]. / Schockraumindikation nach Unfallhergang.

BACKGROUND: The quality of trauma care in Germany has been significantly increased due to the establishment of standards in the white paper on severe injury care and the S3 guidelines. A key issue of multiple trauma treatment is the trauma resuscitation unit (TRU)/emergency room management, which is associated with extensive material and human resources. From the very beginning of the introduction of structured care for the severely injured, the choice of the target hospital and the indications for TRU have been the focus of scientific research. Furthermore, a reduction of the TRU team for presumably less seriously injured patients is discussed. MATERIAL AND METHODS: The emergency room assignments of a level I trauma center (n = 686) were analyzed in more detail. Of the patients 235 were assigned with the TRU indications according to the cause of the accident (GoR B criteria) and compared with the collective of TRU patients admitted according to the severity of injuries or life-threatening signs, the so-called GoR A criteria (n = 104) during the corresponding period. In addition to basic data (age, sex), the injured region and severity (injury severity score, ISS), the length of stay in the intensive care unit (ICU) and hospital as well as the necessity for surgery and transfusion were compared. RESULT: Of the emergency room allocations at the trauma center 34% were due to the cause of the accident and the severity of the injuries in this patient group was almost half as high as that of the control group with an ISS of 11. Of the patients 74% were admitted to the IMC/ICU and stayed there for an average of almost 3 days. There were between 4% and 18% severe injuries (abbreviated injury scale, AIS 3) and 17.9% were characterized as polytrauma with an ISS ≥ 16 points. CONCLUSION: A significant number of patients admitted to a TCU due to the cause of accident (the so-called B criteria of the white book), have severe and potentially life-threatening injuries, which necessitate a prioritized and immediate treatment by a TCU team. Whether a reduced TCU team is sufficient in this situation needs to be critically examined.

[Cost estimation for hospital mass casualty exercises]. / Kostenabschätzung für MANV-Übungen im Krankenhaus.

A mass casualty event (MCE) poses an enormous challenge for rescue services and hospitals. In addition to a hospital emergency plan, employee training and practice exercises are essential to be prepared for such an event. The organizational and financial burden of MCE exercises in a hospital is extraordinarily high. In a retrospective analysis of several large hospital exercises, the magnitude of the necessary financial means for the preparation and execution of such drills is outlined. Depending on the size (number of patients) and scope (extent of departments involved) of the MCE exercise in a hospital, a full-size MCE drill may entail costs between 10,000 and 100,000€. Since the execution of such exercises is essential in the sense of preparedness and considering quality management aspects, possibilities of refinancing and more cost-efficient training must be developed.

Return to sport after acute acromioclavicular stabilization: a randomized control of double-suture-button system versus clavicular hook plate compared to uninjured shoulder sport athletes.

PURPOSE: Traumatic high-grade acromioclavicular joint (ACJ) separations can be surgically stabilized by numerous anatomic and non-anatomic procedures. The return to sport (Maffe et al. in Am J Sports Med 23:93-98, 1995] and remaining sport-associated impairments after acute ACJ stabilization has not yet been investigated. METHODS: 73 consecutive athletes with acute high-grade ACJ separation were prospectively assigned into two groups (64.4% randomized, 35.6% intention-to-treat): open clavicular hook plate (cHP) implantation (GI) or arthroscopically assisted double double-suture-button (dDSB) implantation (GII). Patients were analyzed using shoulder sport-specific measurement tools for sport ability (ASOSS), sport activity (SSAS), and numerical analog scales: NASpain during sport, NASshoulder function in sport, and NASre-achievement of sport level. Four points of examination were established: preoperative evaluation (FU0) and first postoperative follow-up (FU1) at 6 months; FU2 at 12 months; and FU3 at 24 months after surgery. The control group (GIII) consisted of 140 healthy athletes without anamnesis of prior macro-injury or surgery. RESULTS: After surgical stabilization, 29 of 35 athletes in GI (82.9%; 38.6 ± 9.9 years) and 32 of 38 in GII (82.9%; 38.6 ± 9.9 years) were followed up for 24 months (FU3) (loss 17.8%). All operated athletes showed significantly increased scores compared to FU0 (p < 0.05). Compared to GI, GII showed significantly superior outcome data for sporting ability as well as for NASre-achievement of sport level (p < 0.05). While GII re-achieved GIII-comparable SSAS and ASOSS levels, GI remained at a significantly inferior level. Athletes after ACJ injury of Rockwood grade IV/V and overhead athletes benefited significantly from the dDSB procedure. CONCLUSION: The dDSB procedure enabled significantly superior sport-specific outcomes compared to the cHP procedure. Athletes after dDSB surgeries re-achieved the sporting ability and the sport activity levels of healthy athletes, whereas athletes after cHP implantation remained at significantly inferior levels. The more extensive dDSB procedure and the more restrictive rehabilitation are recommended for treatment of acute high-grade ACJ separations of functionally high-demanding athletes. LEVEL OF EVIDENCE: I.

[Nationwide implementation of a hospital resource register for daily trauma care, mass casualties and disasters : Position paper of the German Trauma Society and the Federation of German Medical Directors of Emergency Medical Services]. / Bundesweite Einführung eines Krankenhauskatasters in den Klinikalltag und bei Großschadens- und Bedrohungslagen : Positionspapier der DGU und des BV-ÄLRD e. V.

The introduction of requirements for a minimum intake capacity of trauma patients by the German Trauma Society (DGU) into the so-called white book of treatment of seriously injured patients, is helpful for a sufficient preparation for threats and for dealing with mass casualties for trauma centers as well as for the emergency medical services (EMS). In the hospital information database provided by the Federation of German Medical Directors of Emergency Medical Services, more than 1300 hospitals are currently listed. This information supports the allocation of trauma patients from the field to the appropriate trauma center. Currently, without any coordination requirements, the current 626 trauma centers in Germany are able to immediately handle 6260 patients. This number could be doubled by activating the local hospital action plan, where a priority plan is set up. Additionally, the implementation of a nationwide flexible standardized communication structure between the dispatch center of the ambulance service and the hospitals, would improve daily care as well as the management of threats and mass casualties. It is the obligation of the local medical director of the EMS, to maintain and update the hospital database. Providing the information in the database with the hospital resources and the flexible standard communication structure, is appropriate to improve the daily collaboration and the preparation for mass casualties.

[Optimization of criteria for activation of trauma teams : Avoidance of overtriage and undertriage]. / Optimierung der Kriterien zur Schockraumalarmierung : Vermeidung von Über- und Untertriage.

INTRODUCTION: Severely injured patients are supposed to be admitted to hospital via the trauma room. Appropriate criteria are contained in the S3 guidelines on the treatment of patients with severe/multiple injuries (S3-GL); however, some of these criteria require scarce hospital resources while the patients then often clinically present as uninjured. There are tendencies to streamline the trauma team activation criteria (TTAC); however, additional undertriage must be avoided. A study group of the emergency, intensive care medicine and treatment of the severely injured section (NIS) is in the process of optimizing the TTAC for the German trauma system. MATERIAL AND METHODS: In order to solve the objective the following multi-step approach is necessary: a) definition of patients who potentially benefit from TTA, b) verification of the definition in the TraumaRegister DGU® (TR-DGU), c) carrying out a prospective, multicenter study in order to determine overtriage and undertriage, thereby validating the activation criteria and d) revision of the current TTAC. RESULTS: This article summarizes the consensus criteria of the group assumed to be capable of identifying patients who potentially benefit from TTA. These criteria are used to test if TTA was justified in a specific case; however, as the TTCA of the S3-GL are not fully incorporated into the TR-DGU dataset and because cases must also be considered which were not subject to trauma room treatment and therefore were not included in the TR-DGU, it is necessary to perform a prospective full survey of all individuals in order to be able to measure overtriage and undertriage. CONCLUSION: Currently, the TR-DGU can only provide limited evidence on the quality of the TTAC recommended in Germany. This problem has been recognized and will be solved by conducting a prospective DGU-supported study, the results of which can be used to improve the TR-DGU dataset in order to enable further considerations on the quality of care (e. g. composition and size of the trauma team).

[Preclinical and clinical treatment of instable pelvic injuries : Results of an online survey]. / Präklinische und klinische Versorgung der instabilen Beckenverletzung : Ergebnisse einer Online-Umfrage.

Instable pelvic injuries are often associated with a high blood loss, which can effectively be curtailed by rapid external stabilization of the pelvis. The S3 guidelines on the treatment of multiple trauma and the severely injured recommend an initial stability testing in cases of an instable pelvis and hemodynamic instability even though the sensitivity is very low, with subsequent external stabilization. Radiological diagnostic procedures are also becoming more important for early diagnostics. An online survey of the current management of instable pelvic injuries was carried out with 266 participants via the e-mail distribution list of the German Society of Trauma Surgery (DGU).Most answers in the survey were received from very experienced senior and chief physicians at level 1 trauma centers. The vast majority of the participants recommended carrying out mechanical stabilization testing and most wanted to do the testing themselves independent of any previous findings. Most participants would only carry out a pelvic stabilization if they themselves had recognized instability during the stability testing and many of them even in cases of hemodynamic instability alone, although several studies have reported a very low sensitivity of 26-44 % for stability testing. The preferred procedure for emergency stabilization in the emergency room was the pelvic sling, which in contrast to invasive tools was often implemented before radiological imaging was completed. In preclinical treatment the vacuum mattress was used more often for stabilization than the pelvic sling. In radiological examinations a whole body computed tomography (CT) scan was mostly used, sometimes combined with an anteroposterior pelvic x-ray. In cases of persisting hemorrhage in spite of external stabilization, most participants preferred a pelvic tamponade but angioembolization was also highly rated.Because many of the participants relied on their own findings from stability testing for a decision on external emergency stabilization despite the very low sensitivity, in cases of false negative testing there is a risk of insufficient treatment resulting in life-threatening hemorrhage. From our viewpoint, it therefore makes sense to treat patients with a suspicion of instable pelvic fractures based on the trauma mechanism and clinical examination (without mechanical stability testing) with non-invasive external pelvic stabilization as early as possible.

[Importance of air ambulances for the care of the severely injured]. / Bedeutung der Luftrettung für die Schwerverletztenversorgung.

BACKGROUND: In the late 1960s, helicopter emergency medical services (HEMS) were established because of the increasing number of severely injured in road traffic accidents. It was initially thought to bring the doctor to the patient quickly. AIM: Today, the rescue helicopter covers the entire field of emergency medicine. By analyzing the databases of the TraumaRegister DGU® (2005-2011), the importance of the HEMS for the treatment of the severely injured was examined. RESULTS: The results showed that around 30 % of severely injured are allocated to hospitals by HEMS. In addition to regional differences, the level of the hospital also plays a particularly important role. The combination of the transfer by HEMS and treatment in a level I trauma center has a significantly positive effect on the survival rate of the patient, especially in patients with traumatic brain injury (TBI).

[Air rescue missions at night: Data analysis of primary and secondary missions by the DRF air rescue service in 2014]. / Einsatz der Luftrettung in der Nacht: Datenanalyse von Primär- und Sekundäreinsätzen der DRF-Luftrettung des Jahres 2014.

The advantages that are inherent to the air ambulance service are shown in a reduction in mortality of critically ill or injured patients. The air ambulance service ensures quick and efficient medical care to a patient as well as the immediate transport of patients to a suitable hospital. In addition, primary air rescue has proved to be effective as a support for the standard ground-based ambulance services in some regions of Germany during the night. Under certain conditions, such as the strict adherence to established, practiced and coordinated procedures, air rescue at night does not have a significantly higher risk compared to operations in daytime. Particular requirements should be imposed for air rescue operations at night: a strict indication system for alerting, 4-man helicopter crews solely during the night as well as pilots (and copilots) with the correct qualifications and experience in dealing with night vision devices on a regular basis. Moreover, the helicopters need to be suitable and approved for night flying including cabin upgrades and the appropriate medical technology equipment. To increase the benefits of air rescue for specific diseases and injuries, a nationwide review of the processes is needed to further develop the primary air rescue service.

[Essential measures for prehospital treatment of severely injured patients: The trauma care bundle]. / Wesentliche Maßnahmen zur prähospitalen Versorgung schwerverletzter Patienten: Das Trauma Care Bundle.

BACKGROUND: In order to ensure adequate treatment and to avoid complications, care bundles are increasingly being implemented. These are comprehensive and evidence-based procedures for the treatment of individual diseases or injuries which should be carried out for every patient. The aim of this study was to define a care bundle for the prehospital treatment of severely injured patients. MATERIAL AND METHODS: The scientific contents of the bundle were gathered from the interdisciplinary evidence-based S3 guidelines for the treatment of severely injured patients by the German Trauma Society. The ABCDE scheme suggested by the prehospital trauma life support (PHTLS®) and the advanced trauma life support (ATLS®) functioned as a matrix for the individual elements in the bundles. The identified elements were finalized by a consensus process. RESULTS AND DISCUSSION: A bundle of six elements was suggested and a comprehensive summary of key items during prehospital management of severely injured patients was identified. In a next step the effectiveness of the care bundle should be evaluated in a clinical trial.

Imposter or knight in shining armor? Pelvic circumferential compression devices (PCCD) for severe pelvic injuries in patients with multiple trauma: a trauma-registry analysis.

BACKGROUND: Pelvic Circumferential Compression Devices (PCCD) are standard in hemorrhage-control of unstable pelvic ring fractures (UPF). Controversial data on their usefulness exists. Aim of the study was to investigate whether prehospital application of PCCD can reduce mortality and transfusion requirements in UPF. METHODS: Retrospective cohort study. From 2016 until 2021, 63,371 adult severely injured patients were included into TraumaRegister DGU® of the German Trauma Society (TR-DGU). We analyzed PCCD use over time and compared patients with multiple trauma patients and UPF, who received prehospital PCCD to those who did not (noPCCD). Groups were adjusted for risk of prehospital PCCD application by propensity score matching. Primary endpoints were hospital mortality, standardized mortality rate (SMR) and transfusion requirements. RESULTS: Overall UPF incidence was 9% (N = 5880) and PCCD use increased over time (7.5% to 20.4%). Of all cases with UPF, 40.2% received PCCD and of all cases with PCCD application, 61% had no pelvic injury at all. PCCD patients were more severely injured and had higher rates of shock or transfusion. 24-h.-mortality and hospital mortality were higher with PCCD (10.9% vs. 9.3%; p = 0.033; 17.9% vs. 16.1%, p = 0.070). Hospital mortality with PCCD was 1% lower than predicted. SMR was in favor of PCCD but failed statistical significance (0.95 vs. 1.04, p = 0.101). 1,860 propensity score matched pairs were analyzed: NoPCCD-patients received more often catecholamines (19.6% vs. 18.5%, p = 0.043) but required less surgical pelvic stabilization in the emergency room (28.6% vs. 36.8%, p < 0.001). There was no difference in mortality or transfusion requirements. CONCLUSION: We observed PCCD overuse in general and underuse in UPF. Prehospital PCCD appears to be more a marker of injury severity and less triggered by presence of UPF. We found no salutary effect on survival or transfusion requirements. Inappropriate indication and technical flaw may have biased our results. TR-DGU does not contain data on these aspects. Further studies are necessary. Modular add-on questioners to the registry could offer one possible solution to overcome this limitation. We are concerned that PCCD use may be unfairly discredited by misinterpretation of the available evidence and strongly vote for a prospective trial.

[Comparison of planimetric CT­based volumetry with simplified models for determining the size of intrapelvic hematomas due to pelvic fractures in emergency room diagnostics]. / Vergleich von planimetrisch CT­gestützter Volumetrie mit vereinfachten Modellen zur Größenbestimmung intrapelviner Hämatome bei Beckenfrakturen im Rahmen der Schockraumdiagnostik.

BACKGROUND: Bleeding in the pelvis can lead to a circulatory problem. The widely used whole-body computed tomography (WBCT) scan in the context of treatment in the trauma resuscitation unit (TRU) can give an idea of the source of bleeding (arterial vs. venous/osseous); however, the volume determination of an intrapelvic hematoma by volumetric planimetry cannot be used for a quick estimation of the blood loss. Simplified measurement techniques using geometric models should be used to estimate the extent of bleeding complications. OBJECTIVE: To determine whether simplified geometric models can be used to quickly and reliably determine intrapelvic hematoma volume in fractures type Tile B/C during emergency room diagnostics or whether the time-consuming planimetric method must always be used. MATERIAL AND METHODS: Retrospectively, 42 intrapelvic hemorrhages after pelvic fractures Tile B + C (n = 8:B, 34:C) at two trauma centers in Germany were selected (66% men, 33% women; mean age 42 ± 20 years) and the CT scans obtained during the initial trauma scan were analyzed in more detail. The CT datasets of the included patients with 1-5 mm slice thickness were available for analysis. By area labelling (ROIs) of the hemorrhage areas in the individual slice images, the volume was calculated by CT volumetrically. Comparatively, volumes were calculated using simplified geometric figures (cuboid, ellipsoid, Kothari). A correction factor was determined by calculating the deviation of the volumes of the geometric models from the planimetrically determined hematoma size. RESULTS AND DISCUSSION: The median planimetric bleeding volume in the total collective was 1710 ml (10-7152 ml). Relevant pelvic bleeding with a total volume > 100 ml existed in 25 patients. In 42.86% the volume was overestimated in the cuboid model and in 13 cases (30.95%) there was a significant underestimation to the planimetrically measured volume. Thus, we excluded this volume model. In the models ellipsoid and measuring method according to Kothari, an approximation to the planimetrically determined volume could be achieved with a correction factor calculated via a multiple linear regression analysis. The time-saving and approximate quantification of the hematoma volume using a modified ellipsoidal calculation according to Kothari makes it possible to assess the extent of bleeding in the pelvis after trauma if there are signs of a C-problem. This measurement method, as a simple reproducible metric, could be embedded in trauma resuscitation units (TRU) in the future.

[Trauma team activation-Who should be alerted for which patients?] / Schockraumaktivierung ­ Bei welchen Patienten alarmieren wir wen?

INTRODUCTION: It is estimated that in total almost 10 million people are injured in accidents in Germany every year, most of which are in the household milieu and leisure sector. It is estimated that of these more than 32,000 seriously injured patients are admitted to the emergency room every year. It is recommended that the decision of the prehospital treatment team or the first examiner in the hospital as to whether a potentially severely injured patient should be admitted via the emergency room of the hospital should be based on a catalogue of criteria. MATERIAL AND METHOD: Against the background of the update of the S3 guidelines on the treatment of multiple trauma/severely injured patients and on the basis of the current literature, an overview with respect to the composition of the team and the criteria for which an emergency room team is or should be activated is given. RESULTS: Alerting the emergency room team is still recommended if a certain injury pattern is present or if a prehospital intervention is necessary. The B­criteria based on the course of the accident or mechanism, which have recently been the subject of increasing criticism, have been adapted. Recommendations for geriatric patients could also be formulated. DISCUSSION: Compared to the S3 guidelines from 2016 the emergency room alarm criteria could be revised on the basis of new literature and have been included in the revised guidelines. There is no doubt that further optimization. e.g., based on prehospital algorithms or using point of care diagnostics, are possible and desirable in the future.

[Standardized documentation in emergency departments with the core dataset of the DIVI]. / Standardisierte Dokumentation im Schockraum mit dem Kerndatensatz "Notaufnahme" der DIVI.

In Germany the documentation of every prehospital emergency medical treatment has been standardized since 1997 based on the core data-set MIND (minimal emergency physician data-set). Against this background it is very surprising that there is still no standardized data-set implemented for the documentation of early inhospital emergency care. In order to create such a data-set the current state of documentation in many different hospitals all over the country was scrutinized. In addition existing registries and international requirements were taken into consideration. Finally, a modular data-set was created using a Delphi process. This data-set was tested, clinically validated and finally ratified by the executive committee of the DIVI (German Interdisciplinary Association of Critical Care Medicine). The modular data-set was designed in such a way that a basic module forms the foundation for every patient. Process-oriented modules (e.g. surveillance) and symptom-oriented modules (e.g. trauma, neurology) were added if necessary. Along with this data-set a set of six modules was created for graphical representation when required. This high level of standardization not only allows an internal and external quality assessment but also provides a sophisticated documentation system especially to the trauma team in the emergency department. In terms of content major parameters of interhospital quality management are recorded and important factors of process management, such as MTS (Manchester triage system), ATLS (advanced trauma life support) and EWS (early warning score) have been implemented. The data-set includes all necessary information for transfers between physicians and non-academic staff as well as between physicians and could also be used as a fundamental discharge letter. Moreover, this new core data-set is the implementation of items required by existing registries into the daily routine documentation in order to reduce unnecessarily time-consuming and error-prone secondary data acquisition. For example, all items of the preclinical and emergency room documentation for the TraumaRegister DGU® (documentation phase S, A and B of the standard and QM form) have been included. This is sufficient for participation as a TraumaNetzwerk DGU® member as far as the early clinical treatment of multiple injured patients is concerned.

[Web-based evidence of treatment capacity. An instrument for optimizing the interface between prehospital and hospital management]. / Web-basierter Versorgungskapazitätsnachweis. Ein Instrument zur Schnittstellenoptimierung zwischen Präklinik und Klinik.

BACKGROUND: The outcome of injured patients depends on intrastractural circumstances as well as on the time until clinical treatment begins. A rapid patient allocation can only be achieved occur if informations about the care capacity status of the medical centers are available. Considering this an improvement at the interface prehospital/clinical care seems possible. MATERIAL AND METHOD: In 2010 in Frankfurt am Main the announcement of free capacity (positive proof) was converted to a web-based negative proof of interdisciplinary care capacities. So-called closings are indicated in a web portal, recorded centrally and registered at the local health authority and the management of participating hospitals. RESULTS: Analyses of the allocations to hospitals of all professional disciplines from the years 2009 and 2010 showed an optimized use of the resources. A decline of the allocations by the order from 261 to 0 could be reached by the introduction of the clear care capacity proof system. The health authorities as the regulating body rarely had to intervene (decline from 400 to 7 cases). Surgical care in Frankfurt was guaranteed at any time by one of the large medical centers. CONCLUSION: The web-based care capacity proof system introduced in 2010 does justice to the demand for optimum resource use on-line. Integration of this allocation system into the developing trauma networks can optimize the process for a quick and high quality care of severely injured patients. It opens new approaches to improve allocation of high numbers of casualties in disaster medicine.

[Herniation of the middle lobe of the right lung due to a coarsely dislocated sternum fracture]. / Prolaps des rechten Lungenmittellappens über eine grob dislozierte Sternumquerfraktur.

In cases of multiple trauma in patients with an injury severity score (ISS) > or =16 chest injuries, abbreviated injury scale (AIS) > or =3, are also sustained in 57.2% of all patients. Life-threatening complications may occur with lung contusions and rib fractures also in combination with hemothorax/pneumothorax being the most common diagnoses. In addition the lungs can also be functionally impaired by ruptures of the great thoracic vessels or in isolated cases by herniation of lung tissue following tears in the wall of the thorax. A case of multiple trauma in a 44-year-old male (ISS 29) with blunt thoracic trauma resulting in herniation of the middle lobe of the right lung into the subcutaneous tissue due to a coarsely dislocated fracture of the sternum is reported. This still ventilated lung tissue was surgically resituated 4 weeks after the event and the sternum fracture was simultaneously stabilized by plate osteosynthesis. Clinical examination and awareness of the possibility of other injuries (high level of suspicion) are essential. Therefore, standard diagnostic procedures combined with multislice computed tomography during the first examination and reassessment should be included to avoid missed injuries.

[Isolated ruptures of the tendon of the biceps femoris muscle]. / Die isolierte Ruptur der Biceps-femoris-Sehne.

Traumatic ruptures of tendons in the region of the knee joint are often accompanied by substantial degenerative and inflammatory alterations, especially when the patella and quadriceps tendons are affected. Isolated ruptures of the tendon of the distal biceps femoris muscle at the dorsolateral aspect of the knee are rare and result in an acute reduction of flexion capability. However, tears of the biceps femoris tendon are not associated with degenerative changes. This article reports on the diagnosis and treatment of a 27-year-old football player who suffered an acute isolated rupture of the biceps femoris tendon.

[Time in care of trauma patients in the air rescue service: implications for disposition?]. / Versorgungszeiten bei Traumapatienten im Luftrettungsdienst: Implikationen für die Disposition?

BACKGROUND: Time plays a crucial role in treating multiple traumatized patients and delays in management worsen the prognosis. Furthermore, current studies show that trauma patients profit from primary delivery to a trauma center. Therefore, the goal of physician-staffed ground and air rescue services in Germany is to treat these patients as quickly as possible and deliver them to a suitable trauma center. The aim of the present study was to investigate prehospital treatment times for the air rescue team in terms of disposition and efficiency when a ground rescue team was already present at the scene. METHODS: In a nationwide, multicenter analysis emergency missions carried out for traumatological emergencies in 2006 by 28 air rescue centers (ARC) of the TeamDRF and 6 ARC of the federal police were evaluated using the medical database MEDAT of the German Air Rescue Service. A distinction was made between combined missions with (MEDAT 1 group) and without (MEDAT 2 group) physician-staffed ground emergency medical services already being present at the emergency site and in particular the rescue helicopter treatment times for both groups were investigated. Furthermore, combined missions (MAN 1 group) and solo missions (MAN 2 group) for traumatological emergencies in the period 01.05.2006 to 31.01.2007 were investigated in a complementary prospective regional study at the ARC Heidelberg/Mannheim "Christoph 53". In both groups the total treatment times for all physician-staffed emergency systems involved in treatment at the scene were investigated. RESULTS: Nationwide, 26,010 primary missions could be evaluated and of these, 11,464 missions were traumatological emergencies (44.1%) with 2,229 (19.4%) carried out by the MEDAT 1 group and 9,235 (80.6%) by the MEDAT 2 group. For both groups the helicopter treatment times depended on the severity of the injuries (NACA classification) and were between 17+/-12 min (NACA I) and 34+/-19 min (NACA VII) in MEDAT group 1 versus 21+/-10 and 36+/-19 min in MEDAT group 2 (p<0.05, p<0.001), respectively. In the MEDAT 1 group, the average treatment times were between 2.8 min (NACA VII) and 8.1 min (NACA VI) shorter compared with the MEDAT 2 group. Moreover, when taking the severity of the injury into consideration, a regular and significantly higher treatment effort (e.g. intubation, repositioning and chest tube insertion) and a greater proportion of patients who were transported to the clinic via rescue helicopter were observed for the MEDAT 1 group than for the MEDAT 2 group. In the regional study 670 primary missions were evaluated including 382 traumatological emergencies (57%). From these, 90 multiple trauma patients (NACA V) were not resuscitated or died at the scene, 58 from the MAN 1 group and 32 from the MAN 2 group, and were investigated more closely. The helicopter treatment times were comparable to those observed in the nationwide study and were found to be 26+/-12 min and 35+/-20 min (p<0.05), respectively. In the MAN 1 group the treatment times for the ground rescue services up to the time when the helicopter arrived was 22+/-11 min on average; the total treatment time was 48+/-15 min and 12+/-8 min longer than the time for the MAN 2 group, which was statistically significant. In the MAN 1 group the helicopter was alerted on average 17+/-15 min after the physician-staffed ground rescue services arrived at the emergency site. Treatment by the rescue helicopter teams was significantly more extensive in the MAN 1 group. CONCLUSIONS: The treatment times for the helicopter were several minutes shorter when a physician-staffed ground rescue team had already arrived at the emergency site. However, it must be assumed that the total prehospital time is significantly longer for such missions. These results directly affect the disposition at the emergency dispatch center and indicate that when air rescue is required to transport a patient to hospital, the helicopter should be alerted at an early stage. In such settings, it is likely that initiating the operation in this way would improve the prognosis of severely injured patients and save costs.