Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow

Nicholas C Z Woinarski, Satoshi Suzuki, Miklos Lipcsey, Natalie Lumsden, Jaye Chin-Dusting, Antoine G. Schneider, Michael Bailey, Rinaldo Bellomo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background: Near-infrared spectroscopy of the thenar eminence (NIRSth) can be used at the bedside to assess tissue oxygenation (StO2), the reperfusion response to ischaemia and the tissue haemoglobin index (THI). Its ability to estimate forearm blood flow (FBF) has not previously been assessed. Objectives: We aimed to test whether short-lived venous occlusion-induced changes in NIRSth-derived THI (ΔTHI/minute) correlate with strain gauge plethysmography (SGP) measurements. Methods: We measured FBF in nine volunteers with SGP by venous occlusion, while estimating ΔTHI. Measurements were obtained in two forearm positions (elevated and horizontal) at baseline and during induced hyperaemia. Results: We performed 246 paired measurements at rest and after occlusion-induced hyperaemia. At rest, mean SGP-estimated FBF was 3.5-3.6 mL/dL/minute at baseline, compared with 12.9-13.6 mL/dL/minute during hyperaemia. At rest, ΔTHI was 6.1-8.2/minute, compared with 29.7-32.5/minute during hyperaemia. ΔTHI was a significant predictor of SGP FBF (P <0.01), with stronger correlation during hyperaemia (P <0.01). An equation was developed to convert ΔTHI/minute into FBF at mL/dL/minute (FBF = 0.362 × ΔTHI/minute + 0.864). Conclusions: NIRSth can be used to estimate FBF. Given its portability and its ability to also measure StO2 and vascular reactivity, NIRSth can assist in providing a comprehensive bedside assessment of the forearm circulation in critically ill patients.

Original languageEnglish
Pages (from-to)323-326
Number of pages4
JournalCritical Care and Resuscitation
Volume15
Issue number4
Publication statusPublished - 2013

Fingerprint

Near-Infrared Spectroscopy
Forearm
Hemoglobins
Hyperemia
Plethysmography
Critical Illness
Reperfusion
Blood Vessels
Volunteers
Ischemia

ASJC Scopus subject areas

  • Critical Care and Intensive Care Medicine
  • Emergency Medicine
  • Anesthesiology and Pain Medicine

Cite this

Woinarski, N. C. Z., Suzuki, S., Lipcsey, M., Lumsden, N., Chin-Dusting, J., Schneider, A. G., ... Bellomo, R. (2013). Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow. Critical Care and Resuscitation, 15(4), 323-326.

Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow. / Woinarski, Nicholas C Z; Suzuki, Satoshi; Lipcsey, Miklos; Lumsden, Natalie; Chin-Dusting, Jaye; Schneider, Antoine G.; Bailey, Michael; Bellomo, Rinaldo.

In: Critical Care and Resuscitation, Vol. 15, No. 4, 2013, p. 323-326.

Research output: Contribution to journalArticle

Woinarski, NCZ, Suzuki, S, Lipcsey, M, Lumsden, N, Chin-Dusting, J, Schneider, AG, Bailey, M & Bellomo, R 2013, 'Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow', Critical Care and Resuscitation, vol. 15, no. 4, pp. 323-326.
Woinarski NCZ, Suzuki S, Lipcsey M, Lumsden N, Chin-Dusting J, Schneider AG et al. Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow. Critical Care and Resuscitation. 2013;15(4):323-326.
Woinarski, Nicholas C Z ; Suzuki, Satoshi ; Lipcsey, Miklos ; Lumsden, Natalie ; Chin-Dusting, Jaye ; Schneider, Antoine G. ; Bailey, Michael ; Bellomo, Rinaldo. / Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow. In: Critical Care and Resuscitation. 2013 ; Vol. 15, No. 4. pp. 323-326.
@article{0a6f4d4ac5294d3e854e720eaf164cb3,
title = "Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow",
abstract = "Background: Near-infrared spectroscopy of the thenar eminence (NIRSth) can be used at the bedside to assess tissue oxygenation (StO2), the reperfusion response to ischaemia and the tissue haemoglobin index (THI). Its ability to estimate forearm blood flow (FBF) has not previously been assessed. Objectives: We aimed to test whether short-lived venous occlusion-induced changes in NIRSth-derived THI (ΔTHI/minute) correlate with strain gauge plethysmography (SGP) measurements. Methods: We measured FBF in nine volunteers with SGP by venous occlusion, while estimating ΔTHI. Measurements were obtained in two forearm positions (elevated and horizontal) at baseline and during induced hyperaemia. Results: We performed 246 paired measurements at rest and after occlusion-induced hyperaemia. At rest, mean SGP-estimated FBF was 3.5-3.6 mL/dL/minute at baseline, compared with 12.9-13.6 mL/dL/minute during hyperaemia. At rest, ΔTHI was 6.1-8.2/minute, compared with 29.7-32.5/minute during hyperaemia. ΔTHI was a significant predictor of SGP FBF (P <0.01), with stronger correlation during hyperaemia (P <0.01). An equation was developed to convert ΔTHI/minute into FBF at mL/dL/minute (FBF = 0.362 × ΔTHI/minute + 0.864). Conclusions: NIRSth can be used to estimate FBF. Given its portability and its ability to also measure StO2 and vascular reactivity, NIRSth can assist in providing a comprehensive bedside assessment of the forearm circulation in critically ill patients.",
author = "Woinarski, {Nicholas C Z} and Satoshi Suzuki and Miklos Lipcsey and Natalie Lumsden and Jaye Chin-Dusting and Schneider, {Antoine G.} and Michael Bailey and Rinaldo Bellomo",
year = "2013",
language = "English",
volume = "15",
pages = "323--326",
journal = "Critical care and resuscitation : journal of the Australasian Academy of Critical Care Medicine.",
issn = "1441-2772",
publisher = "Australasian Academy of Critical Care Medicine",
number = "4",

}

TY - JOUR

T1 - Near-infrared spectroscopy of the thenar eminence to estimate forearm blood flow

AU - Woinarski, Nicholas C Z

AU - Suzuki, Satoshi

AU - Lipcsey, Miklos

AU - Lumsden, Natalie

AU - Chin-Dusting, Jaye

AU - Schneider, Antoine G.

AU - Bailey, Michael

AU - Bellomo, Rinaldo

PY - 2013

Y1 - 2013

N2 - Background: Near-infrared spectroscopy of the thenar eminence (NIRSth) can be used at the bedside to assess tissue oxygenation (StO2), the reperfusion response to ischaemia and the tissue haemoglobin index (THI). Its ability to estimate forearm blood flow (FBF) has not previously been assessed. Objectives: We aimed to test whether short-lived venous occlusion-induced changes in NIRSth-derived THI (ΔTHI/minute) correlate with strain gauge plethysmography (SGP) measurements. Methods: We measured FBF in nine volunteers with SGP by venous occlusion, while estimating ΔTHI. Measurements were obtained in two forearm positions (elevated and horizontal) at baseline and during induced hyperaemia. Results: We performed 246 paired measurements at rest and after occlusion-induced hyperaemia. At rest, mean SGP-estimated FBF was 3.5-3.6 mL/dL/minute at baseline, compared with 12.9-13.6 mL/dL/minute during hyperaemia. At rest, ΔTHI was 6.1-8.2/minute, compared with 29.7-32.5/minute during hyperaemia. ΔTHI was a significant predictor of SGP FBF (P <0.01), with stronger correlation during hyperaemia (P <0.01). An equation was developed to convert ΔTHI/minute into FBF at mL/dL/minute (FBF = 0.362 × ΔTHI/minute + 0.864). Conclusions: NIRSth can be used to estimate FBF. Given its portability and its ability to also measure StO2 and vascular reactivity, NIRSth can assist in providing a comprehensive bedside assessment of the forearm circulation in critically ill patients.

AB - Background: Near-infrared spectroscopy of the thenar eminence (NIRSth) can be used at the bedside to assess tissue oxygenation (StO2), the reperfusion response to ischaemia and the tissue haemoglobin index (THI). Its ability to estimate forearm blood flow (FBF) has not previously been assessed. Objectives: We aimed to test whether short-lived venous occlusion-induced changes in NIRSth-derived THI (ΔTHI/minute) correlate with strain gauge plethysmography (SGP) measurements. Methods: We measured FBF in nine volunteers with SGP by venous occlusion, while estimating ΔTHI. Measurements were obtained in two forearm positions (elevated and horizontal) at baseline and during induced hyperaemia. Results: We performed 246 paired measurements at rest and after occlusion-induced hyperaemia. At rest, mean SGP-estimated FBF was 3.5-3.6 mL/dL/minute at baseline, compared with 12.9-13.6 mL/dL/minute during hyperaemia. At rest, ΔTHI was 6.1-8.2/minute, compared with 29.7-32.5/minute during hyperaemia. ΔTHI was a significant predictor of SGP FBF (P <0.01), with stronger correlation during hyperaemia (P <0.01). An equation was developed to convert ΔTHI/minute into FBF at mL/dL/minute (FBF = 0.362 × ΔTHI/minute + 0.864). Conclusions: NIRSth can be used to estimate FBF. Given its portability and its ability to also measure StO2 and vascular reactivity, NIRSth can assist in providing a comprehensive bedside assessment of the forearm circulation in critically ill patients.

UR - http://www.scopus.com/inward/record.url?scp=84888426845&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84888426845&partnerID=8YFLogxK

M3 - Article

VL - 15

SP - 323

EP - 326

JO - Critical care and resuscitation : journal of the Australasian Academy of Critical Care Medicine.

JF - Critical care and resuscitation : journal of the Australasian Academy of Critical Care Medicine.

SN - 1441-2772

IS - 4

ER -