Diminished skin blood flow in Type I diabetes: evidence for non-endothelium-dependent dysfunction

2001 ◽  
Vol 101 (1) ◽  
pp. 59 ◽  
Author(s):  
Abram KATZ ◽  
Karin EKBERG ◽  
Bo-Lennart JOHANSSON ◽  
John WAHREN
2001 ◽  
Vol 101 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Abram KATZ ◽  
Karin EKBERG ◽  
Bo-Lennart JOHANSSON ◽  
John WAHREN

The purpose of this study was to quantify the extent to which skin blood flow (SBF) responses to application of endothelium-dependent and -independent vasodilating agents differ between Type I diabetic patients and healthy subjects. Patients and matched controls were studied after an overnight fast. SBF was determined with laser Doppler perfusion imaging before and after iontophoresis of acetylcholine (Ach; endothelium-dependent) and sodium nitroprusside (SNP; endothelium-independent). Basal SBF did not differ significantly between groups. Iontophoresis of ACh and SNP increased SBF 20-fold in controls. In the patients, the increases in SBF following iontophoresis of ACh and SNP were reduced by 18% and 19%, respectively, versus controls (P < 0.05 for both). These data demonstrate that Type I diabetic patients have similar diminished SBF responses to iontophoresis of ACh and SNP, which suggests that non-endothelial-dependent factors are primarily responsible for the diminished SBF responses.


1998 ◽  
Vol 94 (3) ◽  
pp. 255-261 ◽  
Author(s):  
Thomas Forst ◽  
Andreas Pfützner ◽  
Thomas Kunt ◽  
Thomas Pohlmann ◽  
Ulrike Schenk ◽  
...  

1. Neurovascular inflammation is impaired in patients suffering from diabetic neuropathy. The aim of our study was to evaluate the distribution of nutritive and total skin blood flow in diabetic patients with and without neuropathy after neurovascular stimulation with acetylcholine. 2. Twenty patients with Type I diabetes, 10 with and 10 without neuropathy, and 10 age-matched non-diabetic control subjects, underwent microvascular investigations before and after neurovascular stimulation by intracutaneous application of acetylcholine. The capillary blood cell velocity in the nailfold of the hallux was measured by videophotometric capillaroscopy, and the total skin microcirculation in the same area by laser Doppler flowmetry. 3. The increase in total skin blood flow was significantly impaired in the group of neuropathic diabetic patients compared with the non-neuropathic diabetic patients (17.5 ± 83 versus 51.0 ± 16.2; P < 0.05) and the non-diabetic subjects (17.5 ± 8.3 versus 67.8 ± 19.7; P < 0.01). The increase in capillary blood flow was not significantly impaired in Type 1 diabetes patients with neuropathy. 4. The ratio between capillary blood flow and total skin perfusion decreased significantly in the control group (from 0.82 ± 0.15 to 0.47 ± 0.11; P < 0.005) and in the Type I diabetes patients without neuropathy (from 0.79 ± 0.12 to 0.43 ± 0.12; P < 0.05), whereas the decrease in the neuropathic group was statistically insignificant (from 1.05 ± 0.19 to 0.72 ±0.16). 5. Diminished total skin perfusion in the foot after intracutaneous stimulation with acetylcholine in Type I diabetes patients is associated with diabetic neuropathy, indicating a disturbance in the neurovascular reflex arc. This impaired neurovascular response is caused by a diminished total and sub-papillary blood flow and not by a diminished nutritive capillary flow. There is no evidence of a diminished nutritive capillary blood flow during neurogenic inflammation in Type I diabetes patients suffering from diabetic neuropathy.


2000 ◽  
Vol 98 (1) ◽  
pp. 111 ◽  
Author(s):  
R. Andrew P. SKYRME-JONES ◽  
Karen L. BERRY ◽  
Richard C. O’BRIEN ◽  
Ian T. MEREDITH

1999 ◽  
Vol 98 (1) ◽  
pp. 111-120 ◽  
Author(s):  
R. Andrew P. SKYRME-JONES ◽  
Karen L. BERRY ◽  
Richard C. O'BRIEN ◽  
Ian T. MEREDITH

Hyperaemia occurs early in the renal and retinal microcirculation of patients with type I (insulin-dependent) diabetes mellitus, and may be critical in the development of nephropathy and retinopathy. We therefore sought to determine whether resting and exercise-induced hyperaemia was also apparent in the skeletal muscle circulation of young subjects with type I diabetes. Blood flow was assessed by venous occlusion plethysmography in 18 diabetic (DM) subjects and 20 matched controls. Exercise entailed 2 min of isotonic exercise against no load. Endothelium-dependent and -independent vasodilator function was assessed following intra-arterial infusion of acetylcholine and sodium nitroprusside respectively. Forearm blood flow (FBF) was higher in DM subjects than in controls (3.3±0.3 and 2.2±0.2 ml·min-1·100 ml-1 forearm respectively; P < 0.005). This was not due to differences in forearm or body size, blood pressure, heart rate, lipid status or glycaemic control. Peripheral insulin levels were higher in DM subjects than in controls (48.5±8 and 15.5±1.5 μ-units/ml respectively; P < 0.005). Resting FBF was closely correlated with insulin levels (r2 = 0.4; P < 0.005). Parameters of exercise-induced hyperaemia [including peak flow (16.4±1.4 and 12.0±0.7 ml·min-1·100 ml-1 forearm in DM and control subjects respectively; P < 0.01) and the volume repaid to the forearm at 5 min post-exercise (32.1±3.1 and 23.1±1.4 ml·100 ml-1 forearm respectively; P < 0.05)] were also significantly greater in DM subjects, even when differences in resting FBF were taken into account. Peak hyperaemic blood flow and the volume repaid at 5 min were also related to insulin levels (r2 = 0.16; P < 0.05 and r2 = 0.27; P < 0.005 respectively). The vasodilator response to acetylcholine was reduced in DM subjects (P < 0.05; analysis of variance), and the slope of this dose–flow relationship was inversely related to insulin levels (r2 = 0.2; P < 0.05). These data show that both resting and exercise-induced skeletal muscle blood flow are augmented in young patients with type I diabetes, possibly due to the vasodilatory effect of increased insulin levels. Diminished vasodilator responses to acetylcholine may also, in part, be a consequence of insulin-augmented resting muscle blood flow.


2019 ◽  
Vol 41 part 1 (2) ◽  
pp. 4-10
Author(s):  
S. D. Shapoval ◽  
I. L. Savon ◽  
O. V. Trybushnyj ◽  
O. O. Maksymova ◽  
D. O. Smyrnova ◽  
...  

Peripheral arterial occlusion and microvascular disorders are important factors that contribute to the onset of lower limb disease in patients with diabetes. Monckeberg's sclerosis (arteriosclerosis) arteriosclerosis is diagnosed as a random finding when performing radiography of the upper or lower extremities, but may be a complicating factor in systemic response syndrome and sepsis in patients with diabetic foot syndrome. Purpose of the study. Analyze the condition of the blood flow of lower limb in patients with diabetes foot syndrome with signs of sepsis, in dependence on the level of Monckeberg's sclerosis. Materials and methods. 75 patients with diabetes were examined, due to diabetic foot syndrome. 11 (14,7%) patients had type I diabetes, the average duration of which was 16,41 ± 3,85 years, 64 (85,3%) patients had type II diabetes, with of 12,25 ± 2,54 years duration. The age of patients with type I diabetes was 35 ± 5,72 years, with type II diabetes was – 63,51 ± 10,22 years. Men with type I diabetes were 63%, with type II diabetes – 53%. According to the latest recommendations Sepsis-3 (2016) and classification criteria, patients had signs of sepsis, which required a certain combination therapy. Patients with sepsis were divided into two groups: group I consisted of 38 patients with an infected ulcer, abscess and phlegmon; to group II of 37 patients with gangrene of the toes, forefoot, gangrene of the entire foot or lower limb. The first group of 38 patients included 5 with type I diabetes and 33 with type II diabetes. By age, sex, concomitant pathology of the group was representative. Main vessels were investigated using ultrasound duplex scanning. Determined arterial systolic pressure at the level of the ankle, with the subsequent calculation of the ankle-humeral index, Arterial systolic pressure was also determined at the level of I toe. We had conducted radiography of the foot in two projections. We had Used X-ray classification of Monckeberg's sclerosis (V. A. Gorelysheva et al., 1989) in stages. Research results. Patients in both groups were examined identically. The treatment was carried out in accordance with the standards of patient management with the development of sepsis; surgical intervention was justified on the basis of information obtained from the survey and clinical data. Patients of group I were performed: dissection of an abscess, phlegmon, sequestrectomy and arthrotomy. In group II – one or several fingers amputation, transmetatarsal amputation of the foot, amputation at the level of the calf or thigh. 33 (86,8 %) patients of group I and 30 (81,0%) patients of group II had signs Monckeberg's sclerosis varying stages. In 19 (58%) patients, group I, the X-ray picture of the distal arteries matched to grade 3 according to the presented classification Monckeberg's sclerosis, 9 (27%) patients had signs of grade IV, 3 (9%) – grade V. 6 (20%) patients, II groups had an X-ray picture of grade III, 13 (43%) patients had signs of grade IV, 11 (36%) had signs of grade V. All 9 patients with type I diabetes had signs of arteriosclerosis. Using X-ray data, it is possible to classify Monckeberg's sclerosis by stages. However, with the duration of the disease for more than 10 years, the calcifications of the walls of the arteries of the foot in the form of a convoluted dense rope or column with simultaneous defeat of the smaller branches, which is characteristic of the final stages of the disease. Despite the fact that as a result of calcifications, the vascular wall becomes rigid and loses the ability to reduce and dilate, the blood flow in it is preserved, and the level of SAT varies from > 200 to 80 mmHg. The presence of Monckeberg's sclerosis by radiography of the lower extremities was detected in 33 (86.8%) patients in group I and 30 (81,0%) in group ІІ. With an increased level of vascular involvement, Monckeberg's sclerosis increases the likelihood of developing critical ischemia and gangrene (x2= 5,41; р = 0,02). In patients of group I with systolic blood pressure of more than 120 mmHg the disease outlook was more favorable than in patients without a pulse wave or systolic blood pressure of the finger less than 80 mmHg (x2 = 11,76; р = 0,0006). With a decrease in systolic blood pressure of less than 30 mmHg to save the distal part of the foot or the limb did not succeed. Calcification of the vascular wall does not affect the arterial patency directly, but after the formation of thrombosis, the blood flow stops. Conclusions. In patients with sepsis, with signs of diabetic foot syndrome, which are characterized by a neuropathic form (ulcer, abscess, phlegmon), the presence of Monckeberg's sclerosis, even the last stages, with preserved systolic blood pressure of 200–120 mmHg does not lead to the development of critical deterioration blood circulation. Deterioration of the rheological conditions of the lower extremity, with a systolic arterial pressure 80–50 mmHg below in combination with stage III–IV Monckeberg's sclerosis increases the risk of gangrene of the foot and limb. In the presence of Monckeberg's sclerosis of 3–5 stages in the small arteries of the foot, it is possible to maintain the integrity of the foot by maintaining a generally sufficient volume of blood flow, due to the fight against atherosclerosis of main vessels, to maintain systolic blood pressure not lower than 80–60 mmHg. Keywords: diabetic foot syndrome, Menkeberg's sclerosis, lower limb ischemia.


2012 ◽  
Vol 52 (3) ◽  
pp. 975-983 ◽  
Author(s):  
Ana Paula Trussardi Fayh ◽  
Mauricio Krause ◽  
Josianne Rodrigues-Krause ◽  
Jerri Luiz Ribeiro ◽  
Jorge Pinto Ribeiro ◽  
...  

2000 ◽  
Vol 99 (5) ◽  
pp. 383-392 ◽  
Author(s):  
R. Andrew P. SKYRME-JONES ◽  
Richard C. O'BRIEN ◽  
Ian T. MEREDITH

We and others have previously documented increased resting and exercise-induced skeletal muscle blood flow in young subjects with Type I (insulin-dependent) diabetes mellitus compared with healthy controls. Both NO and prostanoids are important regulators of vascular tone and may therefore contribute to this hyperaemia. The aim of the present study was to determine the contribution of NO and vasodilator prostanoids to this skeletal muscle hyperaemia in diabetes. We assessed the effects of infusion into the intrabrachial artery of the cyclo-oxygenase inhibitor acetylsalicylic acid (ASA; aspirin) and of the L-arginine analogue NG-monomethyl-L-arginine (L-NMMA) on skeletal muscle blood flow in subjects with Type I diabetes mellitus (DM subjects) and control subjects. Blood flow was measured by venous occlusion plethysmography. Isotonic forearm exercise involved 2 min of wrist flexion and extension. Resting flow (forearm blood flow; FBF) was augmented in DM subjects, as was peak exercise-related blood flow (PFBF) and the volume repaid to the forearm 5 min after exercise (AUC 5, where AUC is area under the flow–time curve) (P < 0.05), even when accounting for differences in basal flow. Infusion of L-NMMA reduced resting flow by 48% in controls (P < 0.005) and by 12% in DM subjects (not significant). L-NMMA reduced PFBF and AUC 5 by 29% (P < 0.05) and 39% (P < 0.0005) respectively in controls, but had no significant effect on these parameters in DM subjects. Infusion of ASA reduced FBF, PFBF and AUC 5 in both DM (P < 0.05) and control (P < 0.05) subjects, but the magnitude of this reduction was greater in DM than in control subjects (ANOVA, P < 0.05), even when differences in resting FBF were accounted for. Indeed, ASA eliminated the differences in FBF, PFBF and AUC 5 between DM and control subjects. Thus increased release of vasodilator prostanoids, rather than of NO, appears to account for skeletal muscle hyperaemia in Type I diabetes.


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