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It is shown that at various locations on the hand, the raw PPG signal provides richer and previously little\u2010known information on the redistribution of blood between the arterial, microcirculatory, and venous beds, while the conventional blood flow (BF) parameter recorded by LDF technique is less sensitive to it and largely does not capture this redistribution.<\/jats:p>","DOI":"10.1002\/jbio.70347","type":"journal-article","created":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:34:42Z","timestamp":1788222882000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["What Does the Photoplethysmography Add to Laser Doppler Flowmetry During the Brachial Artery Occlusion Test?"],"prefix":"10.1002","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-3916-5645","authenticated-orcid":false,"given":"Vasily","family":"Karpov","sequence":"first","affiliation":[{"name":"Laboratory of Medical and Physics Research Moscow Regional Research and Clinical Institute (\u201cMONIKI\u201d) Named After M.F. 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