Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0022116 (ischemia)
 91,303 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Changes in blood flow can be measured with the aid of infrared thermography and make possible a comparative assessment of the vascular effect of vasoconstrictors and local anesthetics. With Adrenalin, vasoconstriction sets in immediately following infiltration; with POR-8, a sufficient vasoconstriction is observed only after 10 to 15 minutes. In both products, ischemia subsides after 60 minutes. Adrenalin then reverses the reaction in reactive hyperemia after 150 minutes, while the tissue infiltrated with POR-8 returns to normal ater 120 minutes. When combining a local anesthetic with a vasoconstrictor, the intrinsic vascular effect has to be considered. We experimentally proved that Novocain (procaine), Hostacain (butanilicaine), and on a lower scale Xylocaine (lignocaine) have a vasodilator effect. Citanest (prilocaine) demonstrates no vasodilatory effect. Carbocaine (mepivacaine) produces a mild vasoconstriction.
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PMID:Investigation of the vascular effect of newer local anesthetics and vasoconstrictors. 29 55

The endovascular treatment of spinal vascular malformations places the spinal cord at risk for ischemia. When these procedures are performed using general anesthesia, the neurophysiological monitoring methods currently available provide the only means by which to assess the functional integrity of sensory and motor pathways. Neurophysiological monitoring allows a warning for the neuroradiologist of impending irreversible neurological damage so that action may be taken for the prompt restoration of adequate spinal cord perfusion. Muscle motor evoked potentials (mMEPs) better reflect spinal cord perfusion in the anterior spinal artery territory than do somatosensory evoked potentials (SEPs), although their use during spinal endovascular procedures remains anecdotal in the literature. In the study reported here we assessed: (1) the feasibility of intraoperative neurophysiological monitoring, (2) the role of provocative tests with Amytal and Xylocaine, and (3) the specific but complementary role played by SEPs and mMEPs, during endovascular embolization of spinal vascular malformations and tumors. The results suggest that: (1) neurophysiological monitoring is feasible during most endovascular procedures in the spine and spinal cord under general anesthesia, (2) provocative tests enhance the safety of the procedure, (3) mMEPs are more feasible than SEPs and more sensitive than SEPs to provocative tests. We strongly suggest the use of multimodal neurophysiological monitoring and provocative tests during the endovascular treatment of spinal and spinal cord vascular lesions.
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PMID:Neuroprotective role of neurophysiological monitoring during endovascular procedures in the spinal cord. 1146 64

A 52-year-old man had loss of vision and black discoloration of the lids of the right eye after a retrobulbar injection of 3 mL lidocaine hydrochloride 2% (Xylocaine). Examination of the right eye revealed no light perception with extensive necrosis of the lids. Anterior segment examination revealed conjunctival pallor, corneal edema, and necrosis of the sclera. This is a previously unreported complication of retrobulbar anesthesia comprising ophthalmic artery occlusion with scleral melt, ocular ischemia, and eyelid necrosis.
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PMID:Necrosis of the eyelids and sclera after retrobulbar anesthesia. 1268 60