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Changes in temperature in preheated crystalloids at ambient temperatures relevant to a prehospital setting: an experimental simulation study with the application of prehospital treatment of trauma patients suffering from accidental hypothermia
Högskolan i Borås.
Högskolan i Borås.
Högskolan i Borås, Akademin för vård, arbetsliv och välfärd.ORCID-id: 0000-0003-4139-6235
Högskolan i Borås, Akademin för vård, arbetsliv och välfärd.ORCID-id: 0000-0001-6505-9132
Vise andre og tillknytning
2024 (engelsk)Inngår i: BMC Emergency Medicine, E-ISSN 1471-227X, Vol. 24, artikkel-id 59Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background

Accidental hypothermia is common in all trauma patients and contributes to the lethal diamond, increasing both morbidity and mortality. In hypotensive shock, fluid resuscitation is recommended using fluids with a temperature of 37–42°, as fluid temperature can decrease the patient’s body temperature. In Sweden, virtually all prehospital services use preheated fluids. The aim of the present study was to investigate how the temperature of preheated infusion fluids is affected by the ambient temperatures and flow rates relevant for prehospital emergency care.

Methods

In this experimental simulation study, temperature changes in crystalloids preheated to 39 °C were evaluated. The fluid temperature changes were measured both in the infusion bag and at the patient end of the infusion system. Measurements were conducted in conditions relevant to prehospital emergency care, with ambient temperatures varying between − 4 and 28 °C and flow rates of 1000 ml/h and 6000 ml/h, through an uninsulated infusion set at a length of 175 cm.

Results

The flow rate and ambient temperature affected the temperature in the infusion fluid both in the infusion bag and at the patient end of the system. A lower ambient temperature and lower flow rate were both associated with a greater temperature loss in the infusion fluid.

Conclusion

This study shows that both a high infusion rate and a high ambient temperature are needed if an infusion fluid preheated to 39 °C is to remain above 37 °C when it reaches the patient using a 175-cm-long uninsulated infusion set. It is apparent that the lower the ambient temperature, the higher the flow rate needs to be to limit temperature loss of the fluid.

sted, utgiver, år, opplag, sider
BioMed Central (BMC), 2024. Vol. 24, artikkel-id 59
Emneord [en]
Accidental hypothermia, Advanced trauma life support care, Resuscitation
HSV kategori
Forskningsprogram
Människan i vården
Identifikatorer
URN: urn:nbn:se:hb:diva-31784DOI: 10.1186/s12873-024-00969-0ISI: 001201357600001OAI: oai:DiVA.org:hb-31784DiVA, id: diva2:1855080
Tilgjengelig fra: 2024-04-29 Laget: 2024-04-29 Sist oppdatert: 2024-07-04bibliografisk kontrollert

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Herlitz, JohanAxelsson, ChristerLundgren, Peter

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