scholarly journals Comparison of Two Different Uses of Underbody Forced-air Warming Blankets for the Prevention of Hypothermia in Patients Undergoing Arthroscopic Shoulder Surgery: a Prospective Randomized Study

2022 ◽  
Author(s):  
Wenchao Yin ◽  
Qihai Wan ◽  
Haibin Jia ◽  
Xue Jiang ◽  
Chunqiong Luo ◽  
...  
Keyword(s):  
Core Body Temperature ◽  
Randomized Study ◽  
Shoulder Surgery ◽  
Forced Air Warming ◽  
Significant Difference ◽  
Registration Number ◽  
Arthroscopic Shoulder Surgery ◽  
Clinically Significant ◽  
Forced Air ◽  
Core Body

Abstract Background: Forced-air warming (FAW) is an effective method of preventing inadvertent perioperative hypothermia (IPH). However, its warming effects can be influenced by the style and position of the FAW blanket. This study aimed to compare the effects of underbody FAW blankets being placed under or over patients in preventing IPH.Methods: Patients (n=100) undergoing elective arthroscopic shoulder surgery in the lateral decubitus position were randomized into either under body (UB) group or the over body (OB) group (50 per group). The core body temperature (CBT) of the patients was recorded from baseline to the end of anesthesia. The incidences of postoperative hypothermia and shivering were also collected.Results: A steady decline in the CBT was observed in both groups up to 60 minutes after the start of FAW. After 60 minutes of warming, the OB group showed a gradual increase in the CBT. However, the CBT still decreased in UB group until 75 minutes, with a low of 35.7℃ ± 0.4℃. Then the CBT increased mildly and reached 35.8℃ ± 0.4℃ at 90 minutes. After 45 minutes of warming, the CBT was significantly different (P < 0.05). The incidence of postoperative hypothermia in the UB group was significantly higher than that in the OB group (P = 0.023).Conclusions: The CBT was significantly better when the underbody FAW blanket was placed over patients compared with under the patients. However, there was not a clinically significant difference in CBT. The incidence of postoperative hypothermia was much lower in the OB group. Therefore, placing underbody FAW blankets over patients is recommended for the prevention of IPH in patients undergoing arthroscopic shoulder surgery.Trial registration: This single-center, prospective, RCT has completed the registration of the Chinese Clinical Trial Center at 13/1/2021 with the registration number ChiCTR2100042071. It was conducted from 14/1/2021 to 30/10/2021 as a single, blinded trial in Sichuan Provincial Orthopedic Hospital.

Effect of Pre-warming on Reducing the Incidence of Inadvertent Peri-operative Hypothermia for Patients Undergoing General Anaesthesia: A Mini-review

2013 ◽  
Vol 14 (1-2) ◽  
pp. 3-10 ◽  
Author(s):  
Lucie Llewellyn
Keyword(s):  
General Anaesthesia ◽  
Randomised Controlled Trials ◽  
Reference Lists ◽  
Core Body Temperature ◽  
Potential Temperature ◽  
Forced Air Warming ◽  
Clinically Significant ◽  
Forced Air ◽  
Randomised Controlled ◽  
Core Body

AbstractObjective:This mini-review aims to assess the effect pre-warming has on reducing the incidence of inadvertent peri-operative hypothermia for patients undergoing general anaesthesia.Method:A search of the MEDLINE and EMBASE databases, as well as hand-searching through the reference lists of key articles, was undertaken. Articles were included on the basis that the studies were randomised controlled trials, undertaken on patients who were undergoing surgery under general anaesthesia and were pre-warmed for 60 minutes using forced-air warming systems. This resulted in two articles being critically appraised and reviewed using guidelines based on those given in Greenhalgh and Donald (2000).Findings:The results for both of these studies showed that statistically significant differences were seen in core body temperature, with analysis of variance used to test for the significant differences between the sample means. The findings were also clinically significant, as a small drop in temperature as a result of anaesthesia and surgery can lead to IPH, and with pre-warming this can be avoided.Conclusion:The studies that were used in this review both reported that pre-warming patients for 60 minutes pre-operatively had both a statistically significant and clinically significant effect. This means that patients should receive a period of pre-warming before surgery in addition to being warmed peri-operatively, in order to reduce any drop in potential temperature that can lead to IPH.

scholarly journals Effects of 10-min prewarming on core body temperature during gynecologic laparoscopic surgery under general anesthesia: a randomized controlled trial

2020 ◽  
Vol 15 (3) ◽  
pp. 349-355
Author(s):  
So Young Lee ◽  
Soo Jin Kim ◽  
Jin-Yong Jung
Keyword(s):  
Laparoscopic Surgery ◽  
Primary Outcome ◽  
Core Body Temperature ◽  
Controlled Trial ◽  
Operating Table ◽  
Temperature Changes ◽  
Forced Air Warming ◽  
Forced Air ◽  
Core Body ◽  
Warming Device

Background: Previous research has shown a beneficial effect of prewarming for preventing inadvertent perioperative hypothermia. However, there are few studies of the effects of a short prewarming period, especially in gynecologic laparoscopic surgery. Methods: Fifty-four patients were randomly assigned to 2 groups. Patients in the non-prewarming group were only warmed intraoperatively with a forced air warming device, while those in the prewarming group were warmed for 10 min before anesthetic induction and during the surgery. The primary outcome was incidence of intraoperative hypothermia.Results: Intraoperative hypothermia was observed in 73.1% of the patients in the non-prewarming group and 24% of the patients in the prewarming group (P < 0.001). There were significant differences in core temperature changes between the groups (P < 0.001). Postoperative shivering occurred in 8 of the 26 (30.8%) patients in the non-prewarming group and in 1 of the 25 (4.0%) patients in the prewarming group (P = 0.024).Conclusions: Forced air warming for 10 min before induction on the operating table combined with intraoperative warming was an effective method to prevent hypothermia in patients undergoing gynecologic laparoscopic surgery.

scholarly journals Comparison of Tympanic and Tail Temperatures in Angus and Brahman Steers

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Dikmen S ◽  
Davila KMS ◽  
Rodriquez E ◽  
Scheffler TL ◽  
Oltenacu PA ◽  
...  
Keyword(s):  
Body Temperature ◽  
Repeated Measures ◽  
Core Body Temperature ◽  
The Body ◽  
Tympanic Temperature ◽  
Repeated Measure ◽  
Important Indicator ◽  
Significant Difference ◽  
Brahman Steers ◽  
Core Body

In cattle, core body temperature can be used as an important indicator of heat stress level. However, accurately recording core body temperature can be difficult and labor intensive. The objectives of the current study were 1) to compare the recorded tympanic and tail body temperature measurements in steers and 2) to determine the body temperature change of Angus and Brahman steers in a hot and humid environment. Data was analyzed using a repeated measure model where repeated measures were hourly tympanic and tail temperatures and their difference for individual steers during the day of the experiment. There was a significant breed effect (P=0.01), hour (P<0.0001) and breed by hour interaction (P<0.0001) for the tympanic temperature. Brahman steers, which are known to have superior thermotolerance, maintained a lower body temperature than the Angus steers during the afternoon under grazing conditions. In the Brahman steers there was only a minimal increase in the body temperature throughout the day, an evidence of the thermotolerance ability of the breed. In the Angus steers, which experienced an increase in their body temperature from hour to hour with a peak around 1600 hour; there was a significant difference between the tympanic and tail temperature during the times when the body temperature as measured by the tympanic recordings was the highest (1300 to 1700 hour). Our results indicate that the tympanic temperature can be used to accurately and continuously monitor core body temperature in a natural environment for up to several days and without disturbing the animal.

Role of the hypothalamic PVN in the reflex reduction in mesenteric blood flow elicited by hyperthermia

2008 ◽  
Vol 295 (6) ◽  
pp. R1874-R1881 ◽  
Author(s):  
Feng Chen ◽  
Melissa Dworak ◽  
Yuliang Wang ◽  
Joo Lee Cham ◽  
Emilio Badoer
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Flow ◽  
Body Temperature ◽  
Core Body Temperature ◽  
Separate Group ◽  
Control Group ◽  
Mesenteric Blood Flow ◽  
Significant Difference ◽  
Core Body

The hypothalamic paraventricular nucleus (PVN) is an important integrative center in the brain. In the present study, we investigated whether the PVN is a key region in the mesenteric vasoconstriction that normally accompanies an increase in core body temperature. Anesthetized rats were monitored for blood pressure, heart rate, mesenteric blood flow, and vascular conductance. In control rats, elevation of core body temperature to 41°C had no significant effect on blood pressure, increased heart rate, and reduced mesenteric blood flow by 21%. In a separate group of rats, muscimol was microinjected bilaterally (1 nmol/side) into the PVN. Compared with the control group, there was no significant difference in the blood pressure and heart rate responses elicited by the increase in core body temperature. In contrast to control animals, however, mesenteric blood flow did not fall in the muscimol-treated rats in response to the elevation in core body temperature. In a separate group, in which muscimol was microinjected into regions outside the PVN, elevating core body temperature elicited the normal reduction in mesenteric blood flow. The results suggest that the PVN may play a key role in the reflex decrease in mesenteric blood flow elicited by hyperthermia.

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