Evidence map›Paper›PMID 41620497›Full record

ArticleScientific reports2026

Differential sensitivity of impedance plethysmography and photoplethysmography sensors to temperature-induced peripheral vasoconstriction.

Seobin Jung, Seamus Thomson, Alexandros Pantelopoulos, Lindsey Sunden, Peter Richards, Shwetak Patel, Sam Sheng

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Seobin Jung *Google, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA. seobin@google.com.
Seamus Thomson *Google, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA.
Alexandros PantelopoulosGoogle, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA.
Lindsey SundenGoogle, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA.
Peter RichardsGoogle, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA.
Shwetak PatelGoogle, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA.
Sam ShengGoogle, 1600 Amphitheatre Pkwy, Mountain View, CA, 94043, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Impedance plethysmography (IPG) and photoplethysmography (PPG) are non-invasive techniques for measuring blood volume changes. This study investigated the differential responses of IPG and PPG to temperature-mediated vasoconstriction induced by localized cooling. Twenty-one participants underwent control and treatment conditions, with fake or real ice cubes applied to the forearm. Blood pressure remained stable, while heart rate decreased. PPG signal amplitude significantly decreased with cooling (p

Indexed as

PhotoplethysmographyVasoconstrictionAdultBlood PressureFemaleForearmHeart RateHumansMalePlethysmography, ImpedanceRegional Blood FlowTemperatureYoung AdultBlood flowBlood pressureHeart rateHemodynamicsImpedance plethysmography (IPG)PeripheralPhotoplethysmography (PPG)SensorsSkin temperatureVasoconstrictionWearables

Identifiers

PMID41620497
PMCPMC12916965

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.