Early changes in the skin microcirculation and muscle metabolism of the diabetic foot

Changes in the large vessels and microcirculation of the diabetic foot are important in the development of foot ulceration and subsequent failure to heal existing ulcers. We investigated whether oxygen delivery and muscle metabolism of the lower extremity were factors in diabetic foot disease. We st...

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Veröffentlicht in:The Lancet (British edition) 2005-11, Vol.366 (9498), p.1711-1717
Hauptverfasser: Greenman, Robert L, Panasyuk, Svetlana, Wang, Xiaoen, Lyons, Thomas E, Dinh, Thanh, Longoria, Lydia, Giurini, John M, Freeman, Jenny, Khaodhiar, Lalita, Veves, Aristidis
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container_end_page 1717
container_issue 9498
container_start_page 1711
container_title The Lancet (British edition)
container_volume 366
creator Greenman, Robert L
Panasyuk, Svetlana
Wang, Xiaoen
Lyons, Thomas E
Dinh, Thanh
Longoria, Lydia
Giurini, John M
Freeman, Jenny
Khaodhiar, Lalita
Veves, Aristidis
description Changes in the large vessels and microcirculation of the diabetic foot are important in the development of foot ulceration and subsequent failure to heal existing ulcers. We investigated whether oxygen delivery and muscle metabolism of the lower extremity were factors in diabetic foot disease. We studied 108 patients (21 control individuals who did not have diabetes, 36 patients with diabetes who did not have neuropathy, and 51 patients with both diabetes and neuropathy). We used medical hyperspectral imaging (MHSI) to investigate the haemoglobin saturation (S HSIO 2; % of oxyhaemoglobin in total haemoglobin [the sum of oxyhaemoglobin and deoxyhaemoglobin]) in the forearm and foot; we also used 31P-MRI scans to study the cellular metabolism of the foot muscles by measuring the concentrations of inorganic phosphate and phosphocreatine and calculating the ratio of inorganic phosphate to phosphocreatine (Pi/PCr). The forearm S HSIO 2 during resting was different in all three groups, with the highest value in controls (mean 42 [SD 17]), followed by the non-neuropathic (32 [8]) and neuropathic (28 [8]) groups (p
doi_str_mv 10.1016/S0140-6736(05)67696-9
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We investigated whether oxygen delivery and muscle metabolism of the lower extremity were factors in diabetic foot disease. We studied 108 patients (21 control individuals who did not have diabetes, 36 patients with diabetes who did not have neuropathy, and 51 patients with both diabetes and neuropathy). We used medical hyperspectral imaging (MHSI) to investigate the haemoglobin saturation (S HSIO 2; % of oxyhaemoglobin in total haemoglobin [the sum of oxyhaemoglobin and deoxyhaemoglobin]) in the forearm and foot; we also used 31P-MRI scans to study the cellular metabolism of the foot muscles by measuring the concentrations of inorganic phosphate and phosphocreatine and calculating the ratio of inorganic phosphate to phosphocreatine (Pi/PCr). The forearm S HSIO 2 during resting was different in all three groups, with the highest value in controls (mean 42 [SD 17]), followed by the non-neuropathic (32 [8]) and neuropathic (28 [8]) groups (p&lt;0·0001). In the foot at resting, S HSIO 2 was higher in the control (38 [22]) and non-neuropathic groups (37 [12]) than in the neuropathic group (30 [12]; p=0·027). The Pi/PCr ratio was higher in the non-neuropathic (0·41 [0·10]) and neuropathic groups (0·58 [0·26]) than in controls (0·20 [0·06]; p&lt;0·0001). Our results indicate that tissue S HSIO 2 is reduced in the skin of patients with diabetes, and that this impairment is accentuated in the presence of neuropathy in the diabetic foot. 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subjects Associated diseases and complications
Biological and medical sciences
Blood vessels
Case-Control Studies
Diabetes
Diabetes Mellitus - metabolism
Diabetes. Impaired glucose tolerance
Diabetic Foot - metabolism
Diabetic Neuropathies - metabolism
Endocrine pancreas. Apud cells (diseases)
Endocrinopathies
Energy reserves
Etiopathogenesis. Screening. Investigations. Target tissue resistance
Feet
Female
Forearm
General aspects
Humans
Male
Medical imaging
Medical sciences
Metabolism
Microcirculation
Middle Aged
Muscle, Skeletal - metabolism
Muscles
Muscular system
Oxygen - metabolism
Skin - blood supply
title Early changes in the skin microcirculation and muscle metabolism of the diabetic foot
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