Dynamic sitting to prevent pressure ulcers in spinal cord injured

Reenalda, Jasper

doi:10.3990/1.9789036528849

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…Five subjects showed no significant response in buttock tissue perfusion and oxygenation, and were classified as nonresponding subjects. We already speculated about this phenomenon in our previous study [33]. Similar nonresponding patterns were reported by Bader [27] when investigating the effects of dynamic cushions on skin perfusion in healthy and impaired subjects.…”

Section: Discussionsupporting

confidence: 84%

“…Rapid inflow of blood in the initial stage of tuberal unloading followed by a more gradual outflow in the rest of the movement cycle indicates that the average blood supply increases when the adjustment frequency increases. This might explain the outcomes of our previous study [33], which showed a trend of higher average values for skin oxygenation and subcutaneous tissue perfusion in seating conditions with higher adjustment frequencies.…”

Section: Discussionmentioning

confidence: 65%

“…7 3.3 years, weight 80. 5 7.4 kg, height 1.86 0.05 m, BMI ) of our previous study [33] participated in the present experiment. Prior to the experiment, all subjects read and signed an "informed consent" in which the objective and experimental protocol was explained.…”

Section: A Subjectsmentioning

confidence: 99%

“…In a previous study [33], we investigated the effects of different alternating tuberal support strategies on skin and subcutaneous subtuberal tissue oxygenation and perfusion. Nine different support conditions of 5 min were successively imposed; four periods of static loading and unloading, followed by five periods of dynamic loading and unloading with various adjustment frequencies.…”

Section: Introductionmentioning

confidence: 99%

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The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply

Geffen

Reenalda

Veltink

et al. 2010

IEEE Trans. Neural Syst. Rehabil. Eng.

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Sitting acquired pressure ulcers are places of tissue breakdown that mainly occur under the ischial tuberosities (ITs). Successive durations of pressure relief help the buttock tissue recover from sustained deformation and blood-flow stagnation. A computer-aided simulator chair was developed with two adjustable tuberal support elements (TSE) integrated in a force-sensing seating plane (FSP). This study investigated the redistribution of external buttock load in relation to the pattern (i.e., dynamics) of subtuberal blood supply in sitting with a dynamic tuberal support of 1/60 Hz (80 mm/min). Fifteen healthy male subjects were seated with their ITs on the TSE. The experiment involved periodic TSE adjustment in which buttock interface pressure was measured with the FSP and an external pressure mapping device (PMD). Light-guide tissue spectrophotometry was used for simultaneous noninvasive measurement of oxygenation and perfusion in the skin ( < 2 mm) and subcutaneous ( < 8 mm) tissue under the ITs. TSE adjustment seemed effective to regulate centre of buttock pressure and the forces under the ITs. Differences in measurement with the FSP and PMD have been found due to Hammocking at the seat interface and inaccurate peak pressure readings. Subtuberal blood supply was inversely related to the contact load under the ITs. A rapid inflow of blood in the initial stage of tuberal unloading, followed by a gradual outflow in the rest of the movement cycle indicates that the average blood supply increases when the adjustment frequency increases. Future studies must address the influence of a dynamic tuberal support on the ischial buttock load and pattern of blood supply in impaired individuals.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 65%

Section: A Subjectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply

Geffen

Reenalda

Veltink

et al. 2010

IEEE Trans. Neural Syst. Rehabil. Eng.

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Desenvolvimento De Um Dispositivo Para a Prevenção De Úlcera Por Pressão Em Cadeirantes

Filho

Fumagalli²,

Theodório³

et al. 2013

R. Bras. Inov. Tecnol. Saúde

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Úlceras por pressão ocorrem como consequência de uma obstrução de um vaso sanguíneo, devido à compressão do tecido sob a pele durante um longo período de tempo. Os indivíduos que usam cadeira de rodas ou estão imobilizadas na cama, e também as pessoas idosas com problemas de saúde têm uma grande tendência a desenvolver úlcera de pressão. O objetivo dessa pesquisa é desenvolver um assento eletromecânico que realize conjuntamente a inclinação látero-lateral e ântero-posterior adaptável em uma cadeira de rodas, e produza a alteração tanto da magnitude quanto da duração da pressão de interface. O assento em questão possui um sistema eletromecânico, que permite a movimentação do dispositivo em dois planos, sendo um frontal e outro lateral, acionados por motores DC, possibilitando assim avaliar a mudança de pressão de interface, e consequentemente podendo avaliar a evolução da patologia, em função da variação de pressão em tempos determinados. O equipamento desenvolvido suportou com facilidade uma pessoa adulta com aproximadamente 80 Kg de massa na realização dos testes. Para possibilitar a coleta da pressão de interface, foi usado um equipamento sensorizado e controlado por um software para medir a pressão de interface entre superfícies de contato. A aquisição e o armazenamento dos ângulos de inclinação do assento móvel da cadeira foram realizados através do microcontrolador, programado em linguagem C. Para isso foi concebido um software para movimentar o dispositivo tanto através de um Joystick, como para posicionar o assento móvel em diferentes posições e intervalos de tempo diferentes. Resultados das medidas mostram uma redução da pressão média de interface em até 58%. O equipamento, portanto, possibilitará futuras investigações no desenvolvimento das úlceras de pressão em cadeirantes, analisando tanto a alteração da magnitude quanto a duração da pressão de interface.

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Prognostic factors and underlying mechanisms in chronic low back pain

Hulst¹

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Dynamic sitting to prevent pressure ulcers in spinal cord injured

Cited by 3 publications

References 9 publications

The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply

The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply

Desenvolvimento De Um Dispositivo Para a Prevenção De Úlcera Por Pressão Em Cadeirantes

Prognostic factors and underlying mechanisms in chronic low back pain

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