Childs Charmaine, Wang Li, Neoh Boon Kwee, Goh Hok Liok, Zu Mya Myint, Aung Phyo Wai, Yeo Tseng Tsai
Centre for Health and Social Care Research, Sheffield Hallam University, Montgomery House , 32 Collegiate Crescent , Sheffield S10 2BP .
J Med Eng Technol. 2014 Oct;38(7):339-50. doi: 10.3109/03091902.2014.937834. Epub 2014 Aug 8.
The objective was to investigate sensor measurement uncertainty for intracerebral probes inserted during neurosurgery and remaining in situ during neurocritical care. This describes a prospective observational study of two sensor types and including performance of the complete sensor-bedside monitoring and readout system. Sensors from 16 patients with severe traumatic brain injury (TBI) were obtained at the time of removal from the brain. When tested, 40% of sensors achieved the manufacturer temperature specification of 0.1 °C. Pressure sensors calibration differed from the manufacturers at all test pressures in 8/20 sensors. The largest pressure measurement error was in the intraparenchymal triple sensor. Measurement uncertainty is not influenced by duration in situ. User experiences reveal problems with sensor 'handling', alarms and firmware. Rigorous investigation of the performance of intracerebral sensors in the laboratory and at the bedside has established measurement uncertainty in the 'real world' setting of neurocritical care.
目的是研究神经外科手术期间插入并在神经重症监护期间留在原位的脑内探头的传感器测量不确定度。这描述了一项对两种传感器类型的前瞻性观察性研究，包括完整的传感器-床边监测和读出系统的性能。从16例重度创伤性脑损伤（TBI）患者的大脑中取出传感器时进行了研究。测试时，40%的传感器达到了制造商规定的0.1°C温度规格。在20个传感器中，有8个传感器在所有测试压力下的压力传感器校准与制造商的不同。最大的压力测量误差出现在脑实质内的三联传感器中。测量不确定度不受原位放置时间的影响。用户体验揭示了传感器“操作”、警报和固件方面的问题。在实验室和床边对脑内传感器性能进行的严格研究确定了神经重症监护“现实世界”环境中的测量不确定度。
