Pain Monitoring

Application of Surgical Pleth Index (SPI) in Pain Monitoring

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Application of Surgical Pleth Index (SPI) in Pain Monitoring

（长按 识别二维码 搜索更多麻醉学知识点） 【Definition】 The Surgical Pleth Index (SPI) is a monitoring tool that measures the photoplethysmographic signal from the fingertip to monitor the nociception-anti-nociception balance during general anesthesia. 【Principle】 Stress stimuli activate the peripheral sympathetic nervous system, inducing distal vascular contraction. By measuring the absorption of red light from the fingertip, the photoplethysmographic pulse … Read more

Unveiling the ‘Pain Code’ in Surgery: Surgical Pleth Index (SPI)

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（Long press to scan the QR code for more anesthesia knowledge points） Postoperative pain is one of the biggest concerns for patients. According to statistics, 20%-80% of patients experience moderate to severe pain after surgery, while traditional pain management methods—relying on physician experience and subjective patient descriptions—often have inaccuracies. Today, we will introduce a technique … Read more