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

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Abstract

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.
Original languageUndefined
Article number10.1109/TNSRE.2009.2039384
Pages (from-to)29-37
Number of pages9
JournalIEEE transactions on neural systems and rehabilitation engineering
Volume18
Issue number1
DOIs
Publication statusPublished - Feb 2010

Keywords

  • seating
  • BSS-Biomechatronics and rehabilitation technology
  • buttock load
  • METIS-265680
  • pressure ulcer
  • IR-70526
  • Blood supply
  • EWI-17605

Cite this

@article{7b44b1c410864b29b766285cb08bbb07,
title = "The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply",
abstract = "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.",
keywords = "seating, BSS-Biomechatronics and rehabilitation technology, buttock load, METIS-265680, pressure ulcer, IR-70526, Blood supply, EWI-17605",
author = "{van Geffen}, P. and Koopman, {Hubertus F.J.M.} and Jasper Reenalda and Veltink, {Petrus H.}",
year = "2010",
month = "2",
doi = "10.1109/TNSRE.2009.2039384",
language = "Undefined",
volume = "18",
pages = "29--37",
journal = "IEEE transactions on neural systems and rehabilitation engineering",
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}

The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply. / van Geffen, P.; Koopman, Hubertus F.J.M.; Reenalda, Jasper; Veltink, Petrus H.

In: IEEE transactions on neural systems and rehabilitation engineering, Vol. 18, No. 1, 10.1109/TNSRE.2009.2039384, 02.2010, p. 29-37.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The Effects of a Dynamic Tuberal Support on Ischial Buttock Load and Pattern of Blood Supply

AU - van Geffen, P.

AU - Koopman, Hubertus F.J.M.

AU - Reenalda, Jasper

AU - Veltink, Petrus H.

PY - 2010/2

Y1 - 2010/2

N2 - 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.

AB - 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.

KW - seating

KW - BSS-Biomechatronics and rehabilitation technology

KW - buttock load

KW - METIS-265680

KW - pressure ulcer

KW - IR-70526

KW - Blood supply

KW - EWI-17605

U2 - 10.1109/TNSRE.2009.2039384

DO - 10.1109/TNSRE.2009.2039384

M3 - Article

VL - 18

SP - 29

EP - 37

JO - IEEE transactions on neural systems and rehabilitation engineering

JF - IEEE transactions on neural systems and rehabilitation engineering

SN - 1534-4320

IS - 1

M1 - 10.1109/TNSRE.2009.2039384

ER -