Skin blood flow: A comparison of transcutaneous oximetry and laser Doppler flowmetry

Allen, P. I. M.; Goldman, M.

doi:10.1016/s0950-821x(87)80058-0

Cited by 21 publications

(8 citation statements)

References 8 publications

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“…The ABPI was measured using the Medasonics Ultrasound Stethoscope", Model BF5A (a pocket doppler), following the procedure described by Callam, Ruckley, Dale, and Harper (1987). Concurrent validity (Allen & Goldman, 1987) and stability has been supported (Rooke & Osmundson, 1989). An ABPI of less than 0.90 is associated with arterial disease and an ischaemic ulcer may still heal with an ABPI of greater than 0.25 (Johnson & Patten, 1977;Siegel, Giargiana, Rhodes, Williams, & Wagner, 1975).…”

Section: Instrumentsmentioning

confidence: 99%

Healing determinants in older people with leg ulcers

Johnson

1995

Research in Nursing & Health

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A descriptive correlational design was used to identify the physiologic, therapeutic, and psychosocial determinants of leg ulcer healing in community-residing older people with venous and venous-arterial disease (N = 156). A regression model with healing rate as the dependent variable explained 49% of the variance. Increased pain when mobilizing, increased hours with limbs horizontal to the torso, and moderate and severe liposclerosis (hardening and induration of the skin) were associated with poorer healing rates. Higher wound status scores were associated with more rapid healing rates. Self-efficacy beliefs and social support were not significant factors. The findings suggest the need for early detection and management of limb pain that interferes with normal mobility. Limb position and edema assessment prior to the application of compression bandages is recommended, with bandages that provide clients with high compression when ambulant and low compression when resting being potentially beneficial.

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Section: Instrumentsmentioning

confidence: 99%

Healing determinants in older people with leg ulcers

Johnson

1995

Research in Nursing & Health

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“…Under physiological conditions, arteriolar vasoconstrictive mechanisms lead to reduced lower limb perfusion when changing from the supine to the sitting position. [1][2][3] The mechanism involved can be of central sympathetic45 and/or local origin. In the latter case, myogenic response and venoarteriolar axon reflex have been considered.6 '7 There are indications that these mechanisms are disturbed in patients experiencing relief of pain on leg dependency, resulting in enhanced rather than decreased perfusion on dependency.…”

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confidence: 99%

Capillary recruitment and pain relief on leg dependency in patients with severe lower limb ischemia.

et al. 1992

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Background. Patients suffering from severe lower limb ischemia may experience pain relief on leg dependency despite the fact that dependency normally results in arteriolar vasoconstriction. To clarify this possible paradox, skin microcirculation of the limb was investigated in 75 patients with different stages of lower limb ischemia and in 12 asymptomatic subjects.Methods and Results. Using nailfold capillary video microscopy, red blood cell-perfused

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“…This design characteristic is particularly valuable for assessing the validity of the correlation study between both methods. TcPO 2 and laser Doppler flowmetry measurements of different areas within the same general regions have been previously compared [23][24]. One advantage of LDI over single-contact laser Doppler measurements is the ability to study the local variability of flux within the heated area at two depths within the skin: a superficial region with the red laser and an aggregate of superficial and deeper portions of the skin with the NIR laser [18].…”

Section: Discussionmentioning

confidence: 99%

Preamputation evaluation of limb perfusion with laser Doppler imaging and transcutaneous gases

Figoni¹,

Scremin

Kunkel

et al. 2006

JRRD

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Abstract-We studied 31 subjects with severe leg ischemia and 29 age-matched nonischemic control subjects to compare preamputation assessments of leg ischemia using laser Doppler imaging (LDI), transcutaneous partial pressure of oxygen (TcPO 2 ), and transcutaneous partial pressure of carbon dioxide (TcPCO 2 ). TcPO 2 and TcPCO 2 were evaluated with Novametrix Medical Systems, Inc, monitors (Wallingford, Connecticut) and perfusion (flux) of skin topically heated to 44°C, and adjacent nonheated areas were evaluated with a Moor Laser Doppler Imager (Moor Instruments, Ltd; Devon, England). LDI flux of heated areas, its ratio to nonheated areas, and TcPO 2 (not TcPCO 2 ) were lower in ischemic subjects than in control subjects. LDI flux ratio performed better than TcPO 2 in identifying ischemia, with fewer false positive and false negative results. Moreover, LDI flux of heated skin detected a proximal to a distal gradient of perfusion in ischemic subjects, while TcPO 2 did not. LDI was superior to TcPO 2 in discriminating correctly between ischemic and nonischemic skin. The results suggest that an LDI ratio below 5 indicates nonviable skin.

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Skin blood flow: A comparison of transcutaneous oximetry and laser Doppler flowmetry

Cited by 21 publications

References 8 publications

Healing determinants in older people with leg ulcers

Healing determinants in older people with leg ulcers

Capillary recruitment and pain relief on leg dependency in patients with severe lower limb ischemia.

Preamputation evaluation of limb perfusion with laser Doppler imaging and transcutaneous gases

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