Department of Diving and Hyperbaric Medicine, Prince of Wales Hospital, Sydney, Australia.
Department of Accident and Emergency Medicine, Queen Elizabeth Hospital, HKSAR.
Diving Hyperb Med. 2022 Mar 31;52(1):2-6. doi: 10.28920/dhm52.1.2-6.
Measurement of skin temperature with infrared thermometry has been utilised for assessing metabolic activity and may be useful in identifying patients with ulcers suitable for hyperbaric oxygen treatment and monitoring their treatment progress. Since oxygen promotes vasoconstriction in the peripheral circulation, we hypothesised that oxygen administration may lower skin temperature and complicate the interpretation of temperatures obtained. This pilot study investigated the effect of oxygen administration on lower limb skin temperature in healthy subjects and diabetic patients.
Volunteers were recruited from healthy staff members (n = 10) and from patients with diabetic foot ulcers (n = 10) at our facility. Foot skin surface temperatures were measured by infra-red thermometry while breathing three different concentrations of oxygen (21%, 50% and 100%).
Skin temperature changes were observed with increasing partial pressure of oxygen in both groups. The mean (SD) foot temperatures of diabetic patients and healthy controls at air-breathing baseline were 30.1°C (3.6) versus 29.0°C (3.7) respectively, at FiO₂ 0.5 were 30.1°C (3.6) versus 28.5°C (4.1) and at FiO₂ 1.0 were 28.3°C (3.2) versus 29.2°C (4.3). None of these differences between groups were statistically significant.
Data from this small study may indicate a difference in thermal responses between healthy subjects and diabetic patients when inhaling oxygen; however, none of the results were statistically significant. Further investigations on a larger scale are warranted in order to draw firm conclusions.
使用红外测温仪测量皮肤温度已被用于评估代谢活性，并且可能有助于识别适合高压氧治疗的溃疡患者，并监测其治疗进展。由于氧气会促进外周循环的血管收缩，我们假设给氧可能会降低皮肤温度，从而使温度测量的解释变得复杂。这项初步研究调查了给氧对健康受试者和糖尿病患者下肢皮肤温度的影响。
从我们机构的健康工作人员（n=10）和糖尿病足溃疡患者（n=10）中招募志愿者。通过红外测温仪测量足部皮肤表面温度，同时呼吸三种不同浓度的氧气（21%、50%和 100%）。
两组人群的皮肤温度均随氧分压的增加而发生变化。糖尿病患者和健康对照组在空气呼吸基础线上的平均（SD）足部温度分别为 30.1°C（3.6）和 29.0°C（3.7），在 FiO₂ 0.5 时分别为 30.1°C（3.6）和 28.5°C（4.1），在 FiO₂ 1.0 时分别为 28.3°C（3.2）和 29.2°C（4.3）。这些组间差异均无统计学意义。
这项小规模研究的数据可能表明健康受试者和糖尿病患者在吸入氧气时的热反应存在差异；然而，没有一个结果具有统计学意义。需要进行更大规模的进一步研究，以便得出明确的结论。
