Remote photoplethysmography system for unsupervised monitoring regional anesthesia effectiveness

U. Rubins, A. Miscuks, Z. Marcinkevics, M. Lange

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


Determining the level of regional anesthesia (RA) is vitally important to both an anesthesiologist and surgeon, also knowing the RA level can protect the patient and reduce the time of surgery. Normally to detect the level of RA, usually a simple subjective (sensitivity test) and complicated quantitative methods (thermography, neuromyography, etc.) are used, but there is not yet a standardized method for objective RA detection and evaluation. In this study, the advanced remote photoplethysmography imaging (rPPG) system for unsupervised monitoring of human palm RA is demonstrated. The rPPG system comprises compact video camera with green optical filter, surgical lamp as a light source and a computer with custom-developed software. The algorithm implemented in Matlab software recognizes the palm and two dermatomes (Medial and Ulnar innervation), calculates the perfusion map and perfusion changes in real-time to detect effect of RA. Seven patients (aged 18-80 years) undergoing hand surgery received peripheral nerve brachial plexus blocks during the measurements. Clinical experiments showed that our rPPG system is able to perform unsupervised monitoring of RA.

Original languageEnglish
Title of host publicationBiophotonics - Riga 2017
EditorsJanis Spigulis
ISBN (Electronic)9781510616769
Publication statusPublished - 2017
Externally publishedYes
Event2nd International Conference on Biophotonics-Riga 2017 - Riga, Latvia
Duration: 27 Aug 201729 Aug 2017
Conference number: 2

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


Conference2nd International Conference on Biophotonics-Riga 2017
Abbreviated titleBPR 2017
Internet address


  • Dermatomes
  • Palm detection
  • Perfusion
  • Photoplethysmography imaging
  • Regional anesthesia
  • Remote photoplethysmography
  • Skin microcirculation
  • Unsupervised monitoring

Field of Science*

  • 1.3 Physical sciences
  • 2.6 Medical engineering

Publication Type*

  • 3.1. Articles or chapters in proceedings/scientific books indexed in Web of Science and/or Scopus database


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