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Method of evading the overshoot phenomenon of transcutaneous P(CO2) measurement at the ear lobe

机译：在耳叶中疏散经皮P（CO2）测量的过冲现象的方法

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BACKGROUND: Kagawa et al. confirmed the overshoot of transcutaneous P(CO2) (Ptc(CO2)) during the early stage of measurement with Ptc(CO2) monitor (TOSCA, Linde Medical Sensors AG, Basel, Switzerland). We examined the method to evade this phenomenon. METHODS: Eight adult patients under general anesthesia were examined. Two probes were mounted each on the left and right ear lobes after constant end expiratory P(CO2) had been obtained for ten to fifteen minutes. One P(CO2) probe was set at 42 degrees C. Another one was set at 45 degrees C for the first 15 minutes and then decreased to 42 degrees C. RESULTS: With the probe heated at 42 degrees C, overshoot was observed in 5 out of 8 cases, the peak of which is 44 +/- 5.5 mmHg at 8.2 +/- 1.1 minutes and then these values went down to 39 +/- 4.0 mmHg at 19 +/- 1.3 minutes and stayed stable. Probes heated at 45 degrees C and placed on the opposite side did not show this phenomenon and were stabilized at 5 +/- 0.9 minutes. CONCLUSIONS: With this apparatus, we found that it is effective to avoid overshoot to heat the probe at 45 degrees C and to change at 42 degrees C after 15 minutes.
机译：背景：卡加瓦等人。在用PTC（CO2）监测仪（TOSCA，Linde Medical Sensors AG，​​Basel，Switzerland）期间确认了经皮P（CO2）（PTC（CO2））的过冲（PTC（CO2））。我们检查了逃避这一现象的方法。方法：检查全身麻醉下的8例成年患者。在获得恒定的呼气P（CO 2）后，将两个探针在左耳左侧凸起，在恒定的呼气P（CO 2）上获得10至15分钟。将一个P（CO2）探针设定为42℃。将另一个在前15分钟设定为45℃，然后降低至42℃。结果：用探针在42摄氏度下加热，在5中观察到过冲在8例中，峰值为44 +/- 5.5 mmHg，8.2 +/- 1.1分钟，然后这些值在19 +/- 1.3分钟内降至39 +/- 4.0 mmhg并保持稳定。在45摄氏度下加热并放置在另一侧的探针未显示出这种现象，并在5 +/- 0.9分钟稳定。结论：通过该装置，我们发现避免过冲以45摄氏度加热探针并在15分钟后在42℃下改变。

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