# Novel Analgesic Index for Postoperative Pain Assessment Based on a Photoplethysmographic Spectrogram and Convolutional Neural Network: Observational Study

> Research article (Journal of Medical Internet Research, 2021) · cited 19× · AI/ML

**Wikidata**: [openalex:W3125720078](https://www.wikidata.org/wiki/openalex:W3125720078)  
**Source**: https://4ort.xyz/entity/novel-analgesic-index-for-postoperative-pain-assessment-based-on-a-photoplethysmographic-spectrogram-and-convolutional-n