Skin vascular reaction to short durations of normal seating.

The effects of duration and compliance of seating surfaces on reactive hyperemia within the skin overlying the ischial tuberosities was determined in four normal, one paraplegic and one cerebral palsy subject. Reactive hyperemia was demonstrated thermographically after short durations (ie, 5, 10, and 15 minutes) of seating on a hard surface. The magnitude of hyperemic response increased significantly (p < .001 for 15 v 5 minutes; p = .019 for 15 v 10 minutes; p = .001 for 10 v 5 minutes) with increased duration of seating. In all six subjects studied, the maximum postseating blood flow continued to increase with up to 15-minute seating on a hard surface, and the mean maximum response was positively correlated with duration of seating (4 = 0.918, p < 0.001). Although there was good correlations between magnitudes of interface pressures measured and vascular responses within each individual, there was no such direct correlation between individuals.

[1]  H M Finestone,et al.  Erythema and skin temperature following continuous sitting in spinal cord injured individuals. , 1991, Journal of rehabilitation research and development.

[2]  D. Lewis,et al.  Thermographic studies of human skin subjected to localized pressure. , 1971, The American journal of roentgenology, radium therapy, and nuclear medicine.

[3]  T. Love,et al.  THERMOGRAPHY AS AN INDICATOR OF BLOOD PERFUSION , 1980, Annals of the New York Academy of Sciences.

[4]  M. Norman,et al.  Reactive hyperemia in term neonates and adults--a laser Doppler fluxmetry study of skin microcirculation. , 1991, Microvascular research.

[5]  Dinsdale Sm,et al.  Decubitus ulcers: role of pressure and friction in causation. , 1974, Archives of physical medicine and rehabilitation.

[6]  R. Bolli,et al.  Prolonged impairment of coronary vasodilation after reversible ischemia. Evidence for microvascular "stunning". , 1990, Circulation research.

[7]  C. H. Daly,et al.  Effects of external pressure loading on human skin blood flow measured by 133Xe clearance , 1976 .

[8]  R J Minns,et al.  Underseat pressure distribution in the sitting spinal injury patient , 1984, Paraplegia.

[9]  R. Daniel,et al.  Etiologic factors in pressure sores: an experimental model. , 1981, Archives of physical medicine and rehabilitation.

[10]  G V Cochran,et al.  Wheelchair cushion effect on skin temperature, heat flux, and relative humidity. , 1980, Archives of physical medicine and rehabilitation.

[11]  R B Roemer,et al.  Thermal response of skin to application of localized pressure. , 1979, Archives of physical medicine and rehabilitation.

[12]  M. Intaglietta.  Vasomotion and flowmotion: physiological mechanisms and clinical evidence , 1990 .

[13]  W. Kubicek,et al.  Evaluation of pressure as a factor in the production of ischial ulcers. , 1958, Archives of physical medicine and rehabilitation.

[14]  I D Swain,et al.  Methods of measuring skin blood flow. , 1989, Physics in medicine and biology.

[15]  B. Delateur,et al.  Wheelchair cushions designed to prevent pressure sores: an evaluation. , 1976, Archives of physical medicine and rehabilitation.

[16]  P. Verhonick,et al.  THERMOGRAPHY IN THE STUDY OF DECUBITUS ULCERS: PRELIMINARY REPORT , 1972, Nursing research.

[17]  S. Solomon,et al.  Chronic paroxysmal Hemicrania in a child? , 1995, Headache.

[18]  Trandel Rs,et al.  Thermographical investigation of decubitus ulcers. , 1975 .