Zusammenfassung
Bei der Durchsicht der notfallmedizinischen Publikationen der vergangenen Monate in
internationalen medizinischen Zeitschriften konnten zahlreiche neue, klinisch wichtige
Ergebnisse identifiziert werden. So ist bei Schädel-Hirn-Trauma die Anwendung hypertoner
Lösungen möglich, ohne dass jedoch das Langzeitergebnis wesentlich verbessert wird.
Wichtig erscheint die prähospitale Kapnometrie, da ansonsten bis zu 40 % aller beatmeten
Patienten hypoventiliert werden. Eine Studie an 200 Patienten mit prähospitalem Kreislaufstillstand
zeigt, dass in einer Subgruppe ein besseres Überleben (14 % vs. 2 %) erreicht wurde,
wenn bei einer Anfahrtszeit der Ambulanz von > 5 min vor der ersten Defibrillation
zunächst für 3 min konventionell reanimiert wurde, um das Herz zu reperfundieren.
Bei einer Kombination von ACD („active compression decompression”)-CPR mit einem speziellen
Beatmungsventil („inspiratory impedance threshold device”, ITD), das keine passive
Inspiration zulässt, kann ein signifikant besseres Überleben bis 24 h erreicht werden.
Ein solches Ventil führt zu einem verstärkten Blutrückstrom zum Herzen. Hochdosiertes
Adrenalin führte bei intrahospitaler CPR bei Kindern nicht zu einer Verbesserung,
sondern eher zu einer Verschlechterung der Überlebensrate. Im Vergleich zwischen einem
englischen Rettungssystem ohne Notarzt und dem deutschen Rettungssystem ist u. a.
die Überlebensrate nach prähospitalem Kreislaufstillstand mit Notarzt deutlich besser.
Die europäische multizentrische Studie zum Vasopressin vs. Adrenalin als initialem
Vasopressor bei der CPR an 1219 Patienten zeigte insgesamt identische Ergebnisse mit
beiden Vasopressoren. Bei den Subgruppen mit Asystolie bzw. längerer CPR war Vasopressin
überlegen. In weiteren Subgruppenanalysen waren die Gabe von Amiodaron und die Thrombolyse
während der CPR mit einer besseren Überlebensrate assoziiert. Die Lyse während der
Reanimation scheint die Rate der hämodynamischen Stabilisierung zu erhöhen, ohne mit
einer erhöhten Blutungsrate assoziiert zu sein. In einem klaren Statement des „International
Liaison Committee on Resuscitation” (ILCOR) wird die milde Hypothermie (Kühlung auf
32 - 34°C Körperkerntemperatur für 12 - 24 h nach Kreislaufstillstand kardialer Genese)
nicht nur für bewusstlose Patienten mit Kammerflimmern als initialem prähospitalem
Herzrhythmus, sondern auch für alle anderen erwachsenen Patienten (andere Herzrhythmen,
intrahospitale CPR) nach Kreislaufstillstand definitiv empfohlen. In randomisierten
klinischen Studien konnte so sehr eindrucksvoll das Überleben verbessert werden. Eine
solche therapeutische Kühlung kann theoretisch nahezu überall auch mit einfachen Mitteln
- wie der Infusion eiskalter Lösungen - durchgeführt werden.
Abstract
According to scientific publications focusing on emergency medicine and published
in international journals in the past few months, new and clinically important results
can be identified. In patients with severe head trauma (SHT), application of hypertonic
solutions is possible; long term outcome, however, is not improved by this measure.
Prehospital capnometry is important, because otherwise up to 40 % of all mechanically
ventilated patients are hypoventilated. In a study in 200 patients with prehospital
cardiac arrest and ventricular fibrillation as initial cardiac rhythm, subgroup analysis
(alarm-response time > 5 min) showed an increase in survival rate (14 % vs. 2 %),
if defibrillation was proceeded by 3 min of conventional cardiopulmonary resuscitation
(CPR) for reperfusion. If ACD („active compression decompression”)-CPR is combined
with a specific ventilatory valve („inspiratory impedance threshold device”, ITD)
which does not allow passive inspiration, survival rate after cardiac arrest is increased
for up to 24 h. Such a device facilitates an increase in venous return to the heart
during decompression of the thorax. High-dose adrenalin for intrahospital CPR in children
is not associated with better survival but with worse outcome. Comparison of an emergency
medical service (EMS) system from U.K. with paramedics and a physician-staffed German
EMS system demonstrated that survival rate following prehospital cardiac arrest is
markedly increased with doctors on board. The European multicentre trial comparing
vasopressin vs. adrenalin as first vasopressor during CPR in 1219 patients did not
reveal any differences between both groups. In subgroup analyses of patients with
asystoly and prolonged CPR, vasopressin was superior without being associated with
a benefit on neurological outcome. Further subgroup analyses revealed beneficial effects
of amiodarone and thrombolysis during CPR. Thrombolysis during CPR apears to be associated
with an increased rate of haemodynamic stabilisation without increased risk of bleeding
complications. In a very clear advisory statement, the ”International Liaison Committee
on Resuscitation” (ILCOR) has recommended mild therapeutic hypothermia (i. e., cooling
of cardiac arrest victims to 32 - 34°C central body temperature for 12 - 24 h following
cardiac arrest of cardiac etiology) not only for unconciuous patients with ventricular
fibrillation as initial prehospital rhythm, but also for all other adult patients
(other rhythms, intrahospital CPR) following cardiac arrest. In randomised controlled
clinical trials, this therapy has markedly improved survival rate and neurological
outcome. Such therapeutic cooling can be initiated nearly everywhere and with simple
methods - like the infusion of ice-cold cristalloid solutions.
Schlüsselwörter
Notfallmedizin - Schädel-Hirn-Trauma - Polytrauma - Kreislaufstillstand - kardiopulmonale
Reanimation
Key words
Emergency medicine - severe head trauma - polytrauma - cardiac arrest - cardiopulmonary
resuscitation
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Prof. Dr. med. Bernd W. Böttiger
Klinik für Anästhesiologie, Universitätsklinikum Heidelberg ·
Im Neuenheimer Feld 110 · 69120 Heidelberg
eMail: bernd.boettiger@med.uni-heidelberg.de