Hypothermia
Conditions
Keywords
hypothermia, accidental, prewarming, body temperature monitoring, preoperative warming, sublingual temperature assessment, tympanic temperature assessment
Brief summary
The investigators want to evaluate the effect of prewarming on the rate of postoperative hypothermia and shivering and to compare sublingual versus tympanic temperature assessment during the perioperative period in patients. Patients will be randomly assigned to 4 groups with different duration of prewarming. Body temperature will be recorded regularly by sublingual and tympanic (by thermocouple) measurement. Incidence of hypothermia (temp. \< 36°C) and shivering will be assessed postoperatively.
Detailed description
Inadvertent perioperative hypothermia causes many serious complications. Therefore, prevention from, detection and therapy of hypothermia is essential. The appropriate methods of temperature assessment are still under debate as well as the effect and necessary duration of active prewarming of patients to avoid postoperative hypothermia and shivering. The aim of our study is to evaluate the effect of prewarming on the rate of postoperative hypothermia and shivering and to compare sublingual versus tympanic temperature assessment during the perioperative period in patients undergoing elective minor surgery. The investigators plan to include patients scheduled for routine minor surgery of approximately 1h duration. Patients will be randomly assigned to 4 groups with different duration of active prewarming. Body temperature will be recorded regularly by sublingual and tympanic (by thermocouple) measurement. Incidence of hypothermia (temp. \< 36°C) and shivering will be assessed postoperatively.
Interventions
PROCEDUREduration of preoperative active warming
duration of prewarming by forced air warming
Sponsors
University Hospital Schleswig-Holstein
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
Yes
Inclusion criteria
* Patients scheduled for minor surgery (planned duration approximately \<1h). * Age 18-75yrs, * ASA I-II physical status
Exclusion criteria
* Emergency surgery, * pregnant patients, * patients not able to give informed consent, * duration of surgery \>2h, * necessary postoperative mechanical ventilation
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Incidence of hypothermic (body temperature < 36°C) patients at postoperative arrival at postoperative care unit (PACU) | postoperative arrival at PACU (once) | After surgery patients will be admitted to PACU. Body temperature will be evaluted here to study the number of hypothermic patients depended from duration of preoperative warming.Time frame for assessment of data: 5 min after postoperative arrival at PACU (one single measurement, duration: 30 sec).Afterwards patients will be observed for about 2h. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Performance of sublingual vs. tympanic temperature assessment preoperatively in awake patients. | preoperatively (once) at arrival at PACU | Sublingual and tympanic body temperature will be assessed simultaneously once at patients' preoperative arrival at PACU and compared to each other with analysis of correlation. This means that one sublingual and one tympanic temperature value will be measured to be compared to each other.Time frame for assessment of data: one single measurement immediately (1 min) after patients' arrival at PACU. Afterwards: observation of patients for about 2h. |
| Performance of sublingual vs. tympanic temperature assessment intraoperatively in anaesthetised patients. | intraoperatively (30 min after start of surgery), once | Sublingual and tympanic body temperature will be assessed simultaneously (once) 30 min after start of surgery and compared to each other with analysis of correlation. This means that one sublingual and one tympanic temperature value will be measured to be compared to each other.Time frame for data assessment: 1 min after 30 min after start of surgery.Afterwards patients will be observed for about 3h. |
| Performance of sublingual vs. tympanic temperature assessment postoperatively in awake patients. | at postoperative arrival at PACU, once | Sublingual and tympanic body temperature will be assessed simultaneously (once) at patients' postoperative arrival at PACU and compared to each other with analysis of correlation. This means that one sublingual and one tympanic temperature value will be measured to be compared to each other.Time frame for data assessment: 30 sec immediately after patients' arrival at PACU. |
Countries
Germany
Outcome results
None listed