epidural blood patch
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1. A small circumscribed area distinct from the surrounding surface in character and appearance.
2. A drug delivery system that enhances the uptake of a medicine through the skin.
3. Any substance or object used to repair a defect in the body. patchy (pach'e), adjective
An injection of a patient's own blood over the dura to repair a cerebrospinal fluid leak that may be caused by a lumbar puncture, esp. one performed with a large-bore needle. It is used to treat post–lumbar puncture headache.Synonym: epidural blood patch See: post–lumbar puncture headache
cotton-wool patch, cotton-wool spot
A fluffy looking lesion in the nerve fiber layer caused by infarction; usually seen in hypertension, diabetes, collagen vascular disease, or AIDS.
An electrical device for delivering medications transdermally. The slight electric current used in electrical patches allows larger molecules to be transported through the skin. This technique differs from electrophoresis by the electrical current used, which increases the permeability of the skin.Synonym: electroporation See: iontophoresis
epidural blood patchBlood patch.
A solitary oval patch of scaly skin that appears several days before the generalized rash of pityriasis rosea.
Hutchinson patchSee: Hutchinson, Sir Jonathan
A syphilitic eruption having an eroded, moist surface; usually on the mucous membrane of the mouth or external genitals, or on a surface subject to moisture and heat.
A transdermal method of administering nicotine, used as an aid in quitting smoking.
Peyer patchSee: Peyer patch
An oval pale retinal hemorrhage seen in sickle cell disease. See: Hutchinson patch
Leukoplakia of the oral mucosa.
A white, thickened area of oral mucosa that will not rub off and represents a benign hyperkeratosis.See: leukoplakia