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Studying the impact of different body positioning, squatting, and unipodal flexion on perfusion in the lower limb: an exploratory approach complemented with optical spectroscopy (TiVi)

2020-07Journal article Open access
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dc.contributor.authorNuno, Sérgio
dc.contributor.authorFlorindo, Margarida
dc.contributor.authorSilva, Henrique
dc.contributor.authorRodrigues, Luis Monteiro
dc.date.accessioned2021-06-25T20:51:57Z
dc.date.available2021-06-25T20:51:57Z
dc.date.issued2020-07
dc.descriptionProjeto FCT_UIDB/04567/2020pt_PT
dc.descriptionProjeto FCT_UIDP/04567/2020pt_PT
dc.description.abstractBody posture and movement seem to be responsible for multiple variations of microcirculation in the foot, although difficulties associated with measurement during movement have limited their characterization. This pilot study sought to explore a new non-invasive instrument based on polarized light spectroscopy – the TiVi system, under orthostatic and dynamic conditions. Five healthy participants (duly informed, 26.0 ± 6.5 years of age) of both genders were selected. The protocol involved sequential posture changes (orthostatic variation) and dynamic movements (squatting and unipodal flexion). Perfusion variations were evaluated in both feet by laser-Doppler flowmetry (LDF) and polarized spectroscopy (TiVi). Both systems revealed the same type of modification of these flow-related variables. The most pronounced changes were obtained with exercise, especially with squatting, which caused a marked increase in foot perfusion. Less dramatic but in the same direction, the increased perfusion with unipodal flexion was also observed in the contralateral limb. This study confirmed the interest in using the TiVi system in these domains, as well as the appropriateness of this experimental design to look deeper into the impact of lower limb movement on the functional dynamics of the foot.pt_PT
dc.description.abstractRESUMO - A postura corporal e o movimento parecem ser responsáveis por múltiplas variações da microcirculação no pé, embora mal caracterizadas pelas dificuldades associadas à medição durante o movimento. Este estudo-piloto procurou explorar um novo meio não-invasivo, a espectroscopia de luz polarizada pelo sistema TiVi, em condições ortostáticas e dinâmicas. Foram selecionados cinco participantes (26.0 ± 6.5 anos de idade) saudáveis de ambos os sexos, devidamente informados. O protocolo envolveu modificações sequenciais da postura (variação ortostática) e movimentos dinâmicos (agachamento e flexão unipodal). As variações da perfusão foram avaliadas em ambos os pés através da fluxometria de laser-Doppler (LDF) e da espectroscopia de polarização (TiVi). Ambos os sistemas revelaram o mesmo tipo de modificação das variáveis relacionadas com a alteração de fluxo. Os resultados mais expressivos foram registados com o exercício, em especial com o agachamento provocando um marcado aumento da perfusão no pé. Menos evidente mas no mesmo sentido, o aumento de perfusão registada com a flexão unipodal mas, observada também no membro contralateral. O presente estudo confirmou o interesse da utilização do TiVi nestes domínios, bem como a adequabilidade deste desenho experimental para procurar conhecer mais profundamente o impacto do movimento do membro inferior sobre a dinâmica funcional do pé.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationNuno S, Florindo M, Silva H, Rodrigues LM. Studying the impact of different body positioning, squatting, and unipodal flexion on perfusion in the lower limb: an exploratory approach complemented with optical spectroscopy (TiVi). Biomed Biopharm Res. 2020;17(2):187-96.pt_PT
dc.identifier.doi10.19277/bbr.17.2.235pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.21/13488
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationProjeto FCT_UIDB/04567/2020pt_PT
dc.relationProjeto FCT_UIDP/04567/2020pt_PT
dc.relation.publisherversionhttps://www.alies.pt/index.php/en/archive/bbr-vol-17-2-2020pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectFoot microcirculationpt_PT
dc.subjectLDFpt_PT
dc.subjectLaser-doppler flowmetrypt_PT
dc.subjectTiVipt_PT
dc.subjectOrthostaticpt_PT
dc.subjectSymmetrical squattingpt_PT
dc.subjectUnipodal flexionpt_PT
dc.subjectProjeto FCT_UIDB/04567/2020pt_PT
dc.subjectProjeto FCT_UIDP/04567/2020pt_PT
dc.titleStudying the impact of different body positioning, squatting, and unipodal flexion on perfusion in the lower limb: an exploratory approach complemented with optical spectroscopy (TiVi)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage196pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage187pt_PT
oaire.citation.titleBiomedical and Biopharmaceutical Research Journalpt_PT
oaire.citation.volume17pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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