Ziel: Wir untersuchten die Anwendbarkeit eines miniaturisierten Ultraschallsystems für
die transösophageale Echokardiografie (TEE). Material und Methoden: 18 tief sedierte, nichtherzchirurgische operative Intensivpatienten wurden prospektiv
in die Untersuchung eingeschlossen. Die Bildqualität und die mit dem miniaturisierten
Ultraschallsystem erhobenen Diagnosen wurden mit einem Standard-TEE-System verglichen.
Alle Patienten wurden von unabhängigen Untersuchern randomisiert mit beiden Systemen
untersucht; dabei wurde einem festgelegten Untersuchungsgang gefolgt. Die Bildqualität
der zweidimensionalen Darstellung der kardialen Standardschnittebenen und der Spektraldoppleruntersuchungen
wurden auf einer visuellen Analogskala bewertet. Es erfolgte eine Dokumentation der
Untersuchungszeiten. Ergebnisse: In der zweidimensionalen Darstellung der Standardschnittebenen konnten keine Unterschiede
zwischen den zwei Systemen detektiert werden. Bei einigen Spektraldopplerdarstellungen
war das Standardsystem dem miniaturisierten System überlegen. Schlussfolgerung: Die bettseitige Akutdiagnostik eines hämodynamisch instabilen Intensivpatienten ist
mit einem miniaturisierten TEE-System hinreichend aussagekräftig.
Purpose: We examined the feasibility of a newly developed handheld ultrasound device capable
of transesophageal echocardiography (TEE). Materials and Methods: Prospective case series in a non-cardiac surgical intensive care unit including 18
deeply sedated and endotracheally intubated critically ill non-cardiac surgical patients.
The imaging quality and findings of a newly developed handheld device were compared
to those of a cart-based standard TEE system. All patients were examined with both
systems in a randomized order by independent examiners performing a structured and
complete TEE examination. The imaging quality of the standard cardiac cross sections
and spectral Doppler studies of the cardiac valves was assessed on an analog scale
from 1 (excellent) to 5 (insufficient). The time requirements for each study were
documented. Results: We did not detect significant differences in two-dimensional imaging. Continuous-wave
Doppler imaging of the left ventricular outflow tract and pulsed-wave Doppler imaging
of the transmitral flow were significantly better (p < 0.001) with the standard system.
Conclusion: Handheld TEE is a goal-oriented diagnostic tool, which may sufficiently replace a
standard cart-based TEE system in unstable critically ill patients when an acute gross
diagnosis is required.
Key words
heart - echocardiography - anesthesia
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Dr. med. Joerg Brederlau
Klinik und Poliklinik für Anästhesiologie, Universitätsklinikum Würzburg
Oberdürrbacher Str. 6
97080 Würzburg
Phone: ++49/9 31/20 13 04 10
Fax: ++49/9 31/20 13 04 19
Email: brederlau_j@klinik.uni-wuerzburg.de