Aim. To evaluate the effect of local anesthesia on the skin vasodilation induced by the iontophoresis of sodium nitroprusside and heating. Methods. Skin vascular reactivity, in response to iontophoresis of sodium nitroprusside (SNP), was evaluated at the forearm and foot in 13 neuropathic diabetic (DN) and 11 nonneuropathic diabetic (D) patients and 9 healthy, nondiabetic subjects who served as controls (C). The direct (DI) and nerve axon reflex-related (N-V) vasodilation were measured by using two single-point laser Doppler probes. The vasodilation in response to local warming was also assessed. A topical anesthetic was applied on the contralateral forearm and foot and all the measurements were repeated. Results. Dermal anesthesia resulted in a reduction of the direct vasodilation to SNP at the forearm [C: 58.1 +/- 16, D: 60.6 +/- 11%, and DN: 48.3 +/- 37% (postanesthesia percentage of reduction; mean +/- SEM), P < 0.01] and at the foot in all three groups (D: 38.5 +/- 12%, P < 0.01; C: 27.2 +/- 14% and DN: 11.3 +/- 17.5%, P = NS). The N-V related vasodilation was very low before and did not change after local anesthesia. The postanesthesia hyperemic response to warming was significantly reduced at low temperatures but did not change at 44degreesC. Conclusion. The sodium nitroprusside-related vasodilation is reduced after local anesthesia in a similar way in healthy subjects and diabetic patients with and without neuropathy. The response to heating is also reduced at low temperatures. This indicates a stabilizing effect of local anesthesia on the smooth muscle cell. (C) 2003 Elsevier Inc. All rights reserved.

Caselli, A., Uccioli, L., Khaodhiar, L., Veves, A. (2003). Local anesthesia reduces the maximal skin vasodilation during iontophoresis of sodium nitroprusside and heating. MICROVASCULAR RESEARCH [10.1016/S0026-2862(03)00053-0].

Local anesthesia reduces the maximal skin vasodilation during iontophoresis of sodium nitroprusside and heating

UCCIOLI, LUIGI;
2003-01-01

Abstract

Aim. To evaluate the effect of local anesthesia on the skin vasodilation induced by the iontophoresis of sodium nitroprusside and heating. Methods. Skin vascular reactivity, in response to iontophoresis of sodium nitroprusside (SNP), was evaluated at the forearm and foot in 13 neuropathic diabetic (DN) and 11 nonneuropathic diabetic (D) patients and 9 healthy, nondiabetic subjects who served as controls (C). The direct (DI) and nerve axon reflex-related (N-V) vasodilation were measured by using two single-point laser Doppler probes. The vasodilation in response to local warming was also assessed. A topical anesthetic was applied on the contralateral forearm and foot and all the measurements were repeated. Results. Dermal anesthesia resulted in a reduction of the direct vasodilation to SNP at the forearm [C: 58.1 +/- 16, D: 60.6 +/- 11%, and DN: 48.3 +/- 37% (postanesthesia percentage of reduction; mean +/- SEM), P < 0.01] and at the foot in all three groups (D: 38.5 +/- 12%, P < 0.01; C: 27.2 +/- 14% and DN: 11.3 +/- 17.5%, P = NS). The N-V related vasodilation was very low before and did not change after local anesthesia. The postanesthesia hyperemic response to warming was significantly reduced at low temperatures but did not change at 44degreesC. Conclusion. The sodium nitroprusside-related vasodilation is reduced after local anesthesia in a similar way in healthy subjects and diabetic patients with and without neuropathy. The response to heating is also reduced at low temperatures. This indicates a stabilizing effect of local anesthesia on the smooth muscle cell. (C) 2003 Elsevier Inc. All rights reserved.
2003
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MED/13 - ENDOCRINOLOGIA
English
Con Impact Factor ISI
Endothelial function; Laser Doppler; Microcirculation; Skin; Smooth muscle cell; Vascular reactivity
nitroprusside sodium; adult; article; blood vessel reactivity; controlled study; diabetes mellitus; diabetic neuropathy; drug effect; female; heating; human; human experiment; hyperemia; iontophoresis; laser Doppler flowmetry; local anesthesia; male; priority journal; skin blood vessel; smooth muscle fiber; temperature; vasodilatation; vasomotor reflex; warming; Administration, Topical; Adult; Anesthetics, Local; Diabetes Mellitus, Type 1; Diabetes Mellitus, Type 2; Diabetic Neuropathies; Female; Forearm; Heat; Humans; Iontophoresis; Laser-Doppler Flowmetry; Male; Middle Aged; Nitroprusside; Skin; Vasodilation; Vasodilator Agents
Caselli, A., Uccioli, L., Khaodhiar, L., Veves, A. (2003). Local anesthesia reduces the maximal skin vasodilation during iontophoresis of sodium nitroprusside and heating. MICROVASCULAR RESEARCH [10.1016/S0026-2862(03)00053-0].
Caselli, A; Uccioli, L; Khaodhiar, L; Veves, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/56535
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