Zusammenfassung
Perioperative Hypothermie kann das operative Gesamtergebnis negativ beeinflussen. Dabei spielen insbesondere vermehrte kardiale Komplikationen, größere Blutverluste mit erhöhtem Transfusionsbedarf und erhöhte Wundinfektionsraten eine Rolle. Die wesentlichen Ursachen für die Auskühlung sind die Wärmeumverteilung nach Narkoseeinleitung und die negative Wärmebilanz in der perioperativen Phase. Ein adäquates Wärmemanagement umfasst präoperative und intraoperative Maßnahmen. Präoperative Maßnahmen wie die Vorwärmung des Patienten zielen auf eine Erhöhung der Wärmemenge in der Körperperipherie. Dadurch kann die Wärmeumverteilung vom Körperkern in die Peripherie nach der Narkoseeinleitung reduziert werden. Intraoperativ ist eine möglichst großflächige aktive Wärmung der Körperoberfläche erforderlich. Dies kann entweder konvektiv oder konduktiv erfolgen. Bei erwarteten Flüssigkeitsumsätzen von mehr als 500–1000 ml/h sollte ein Infusionswärmer eingesetzt werden. Die Anteile der Körperoberfläche, die nicht aktiv gewärmt werden können, sollten isoliert werden. Der Einsatz von Atemgasklimatisierung oder Heizmatten unter dem Rücken ist wenig effektiv.
Abstract
Perioperative hypothermia can influence clinical outcome negatively. It triples the incidence of adverse myocardial outcomes, significantly increases perioperative blood loss, significantly augments allogenic transfusion requirements, and increases the incidence of surgical wound infections. The major causes are redistribution of heat from the core of the body to the peripheral tissues and a negative heat balance. Adequate thermal management includes preoperative and intraoperative measures. Preoperative measures, e.g., prewarming, enhance heat content of the peripheral tissues, thereby reducing redistribution of heat from the core to the peripheral tissues after induction of anesthesia. Intraoperative measures are active skin surface warming of a large body surface area with conductive or convective warming systems. Intravenous fluids should be warmed when large volumes of more than 500–1000 ml/h are required. The body surfaces that cannot be actively warmed should be insulated. Airway humidification and conductive warming of the back are less efficient.
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Der korrespondierende Autor weist auf eine Verbindung mit folgender Firma/Firmen hin: Der korrespondierende Autor hat in den letzten Jahren mit vielen Firmen (z. B. Augustine Medical, Barkey GmbH, Gaymar, gvb Medizintechnik GmbH, Mallinckrodt Medical GmbH, Medimex Holfeld GmbH, Medutek, Willy Rüsch AG, Smiths-Medical Deutschland GmbH, Stihler Electronic GmbH, Tyco Healthcare Deutschland), die Geräte oder Materialien zur perioperativen Wärmeprotektion herstellen oder vertreiben, zusammengearbeitet und auch zum Teil Honorare für Vorträge erhalten. Die Präsentation des Themas ist unabhängig und die Darstellung der Inhalte produktneutral.
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Bräuer, A., Perl, T. & Quintel, M. Perioperatives Wärmemanagement. Anaesthesist 55, 1321–1340 (2006). https://doi.org/10.1007/s00101-006-1112-6
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DOI: https://doi.org/10.1007/s00101-006-1112-6