No abstract available.
Body Temperature*

BACKGROUND: Few studies have investigated the effectiveness of intravenous fluid warmers at low and moderate flow rates below 1,000 ml/h. In this study, we compared the effectiveness of three different fluid warmers at a low flow rate (440 ml/h). METHODS: We experimentally investigated the fluid warming performances of Mega Acer Kit® (Group M, n = 10), Ranger™ (Group R, n = 10), and ThermoSens® (Group T, n = 10) at 440 ml/h for 60 min. All devices were set at a warming temperature of 41℃ with preheating for 10 min. Intravenous fluids were then delivered through them. The fluid temperature (primary endpoint) was measured at 76 cm from the device after infusion for 60 min. The expected decrease in mean body temperature (secondary endpoint) after 5 h infusion for a 70 kg patient (ΔMBT5) was also calculated. RESULTS: The fluid temperature (mean [95% CI]) at 76 cm from the device, 60 minutes after the infusion was higher in group M (36.01 [35.73–36.29]℃), compared to groups T (29.81 [29.38–30.24]℃) and R (29.12 [28.52–29.72]℃) (P < 0.001). The ΔMBT5 (mean [95% CI]) was significantly smaller in group M (−0.04 [−0.04 to −0.03]℃) than that in groups T (−0.27 [−0.28 to −0.29]℃; P < 0.001) and R (−0.30 [−0.32 to −0.27]℃; P < 0.001). However, none of the fluid warmers provided a constant normothermic temperature above 36.5℃. CONCLUSIONS: Mega Acer Kit® was more effective in warming the intravenous fluid with the smallest expected change in the mean body temperature, compared to Ranger™ and ThermoSens®, at a flow rate of 440 ml/h.
Acer* ; Body Temperature ; Humans

Percutaneous laser ablation is a potential minimally invasive method for tumors. Before developing this technique, clinicians need a method that can easily understand and master the range of laser ablation. In response to clinical needs, we investigated the relationship between temperature and tissue damage during tissue ablation, and designed a temperature measurement device to help doctors grasp the laser ablation range simply and conveniently.
Body Temperature ; Humans ; Laser Therapy ; Temperature

This present study was undertaken to observe the changes of superficial and deep body temperature in 80 surgical patients during general anesthesia. it calculated total body heat loss and compared the effects of several drugs which were used for relieving postoperative shivering. The results were as follows: 1) The mean skin temperature increased contineously over that of the control value after 20 minutes of induction of anesthesia. But there was little significance. 2) Tympanic temperature decreased significantly after 20 minutes(p<0.005), esophageal temperature decreased after 60 minutes(p<0.05), and rectal temperature decreased significantly after 90 minutes(p<0.05). 3) There was continuous loss of body heat during general anesthesia. 4) Pethidine has an excellent effect for relieving postoperative shivering.
Anesthesia ; Anesthesia, General ; Body Temperature Changes* ; Body Temperature Regulation ; Body Temperature* ; Hot Temperature ; Humans ; Meperidine ; Shivering ; Skin Temperature

OBJECTIVETo observe temperature and pressure changes inside plethysmograph produced by body temperature of anesthetized mice.

METHODSThe temperature and pressure changes inside whole body plethysmograph generated from anesthetized mice were compared with those from dead mice. The temperature and pressure changes inside body chamber and head chamber of double-chamber with anesthetized mice in body chamber were synchronously measured. The respiratory frequencies and amplitudes of mice inside two kinds of head-out plethysmographs were synchronously measured. One of these two plethysmographs kept sealed all the time and the other was opened to the atmosphere for 1 min every 2 min.

RESULTTemperature and pressure of air in the anesthetized mice chamber increased 1.18 degree and 2.710 mmHg within 6 min, and data from dead mice were 1.17 degree and 2.671 mmHg. There were no significant differences between these two groups. The temperature inside body chamber increased 1.92 degree in 20 min and the pressure was 5.554 mmHg, which were significantly higher than those of head chamber (0.09 degree and 0.627 mmHg). The respiratory frequencies of mice in the sealed head-out plethysmograph increased from 125.04 per min to 168.45 per min, and amplitudes of pressure changes generated from mice breath decreased from 1.090 mmHg to 0.883 mmHg. Significant differences occurred between different observation time points. Meanwhile respiratory frequencies in the open head-out plethysmograph were around 120 per min and amplitude of pressure changes kept about 1 mmHg. There were no significant differences between different time points.

CONCLUSIONIncrease of temperature and pressure inside pressure whole-body plethysmograph are mainly from body temperature of mice, and the increased pressure significantly influences respiration of mice.

To find out the optimal temperature of infusion fluid during vitrectomy, five rabbit eyes were infused with body temperature (37C) Balanced Salt Solution Plus (BSS Plus, Alcon Laboratories) and the other five eyes with room temperature (22C) BSS Plus. We recorded the ERGs before operation and 2 days, 7 days and 28 days after operation and each recording was plotted on paper with automatically measured amplitude. The a-wave amplitude, b-wave amplitude and b/a ratio showed no significant difference between 22C and 37C groups before operation and 2 days, 7 days and 28 days after operation. The a-wave amplitudes were decreased, b/a ratios were increased and b-wave amplitudes was not changed after operation in both 22C and 37C group. We suggest that there is no difference in the effects of infusion fluid to retinal function whether we use room temperature or body temperature infusion fluid.
Body Temperature ; Retina* ; Retinaldehyde ; Vitrectomy*

Based on the literature review and theories of biophysical theory, the pathway and mechanism of the heat of sandwiched moxibustion stimulating acupoints are analyzed. It is concluded that the heat of sandwiched moxibustion is transferred to the skin of acupoints by heat conduction and thermal radiation. The heat conduct from the skin to deep tissues and other parts was carried out through the biological heat conduction systems. The investigation combined with theories of biological heat conduction was benefit to the research on clinical mechanisms of indirect moxibustion. In addition to heat effect, the infrared resonance of indirect moxibustion and acupoints may be the base of clinical effects of indirect moxibustion.
Body Temperature ; Hot Temperature ; Humans ; Infrared Rays ; Moxibustion ; methods

Through the analysis on warming stimulation at moxa sites and the inflammatory purulent phenomenon by moxibustion, the author points out that moxibustion promotes qi and blood circulation is it's effective feature. It is viewed that "warming and dredging" is the high summarization of moxibustion effect. Moxibustion acts on expelling cold, promoting the circulation in meridian and collateral, clearing away heat, detoxification, strengthening the antipathogenic qi, preventing from diseases and healthcare, etc. All of these functions depend on the effect of moxibustion for circulating qi and blood flow. Hence, "warming and dredging" is the nature of moxibustion.
Blood Circulation ; Body Temperature ; Hot Temperature ; Humans ; Moxibustion ; Qi

Body temperature is an essential physiological parameter. Conducting non-contact, fast and accurate measurement of temperature is increasing important under the background of COVID-19. The study introduces an infrared temperature measurement system based on the thermopile infrared temperature sensor ZTP-135SR. Extracting original temperature date of sensor, post-amplification and filter processing have been performed to ensure accuracy of the system. In addition, the temperature data of environmental compensation which obtained by polynomial fitting is added to the system to further improve measurement accuracy.
Algorithms ; Body Temperature ; COVID-19 ; Humans ; Temperature ; Thermometers

OBJECTIVES: To study the cooling reaction kinetic characteristics of the temperature difference between cadaver temperature and ambient temperature (hereinafter referred to as "cadaver temperature difference") according to the reaction kinetics method. METHODS: Thirty rabbits were randomly divided into 5 groups with 6 rabbits in each group. The rabbits were injected with 10% potassium chloride solution intravenously. After death, the rabbits were placed at 5 ℃, 10 ℃, 15 ℃, 20 ℃ and 25 ℃ environment condition, respectively, and the rectal temperature was measured every minute for 20 hours. The measured cadaver temperature was subtracted from ambient temperature, and the cadaver temperature difference data was calculated using the reaction kinetics formula. The linear regression equation was fitted for analysis, and the experimental results were applied to the temperature difference data of human body after death for verification. RESULTS: Under different environmental conditions, the linear coefficient determination of temperature difference -ln(C/C₀) in rabbits was 0.99, showing a good linear relationship with time t. The application of human body temperature data after death was consistent with the results of animal experiments. CONCLUSIONS Under stable conditions, the temperature difference cooling process after death in rabbits is a first-order kinetic response. The method can also be used to study the temperature difference in human body after death.
Animals ; Humans ; Rabbits ; Body Temperature ; Temperature ; Kinetics ; Cadaver