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Varicose veins and reticular veins are often treated before treating telangiectasia, although treatment of these larger veins in advance of sclerotherapy for telangiectasia may not guarantee better results. [18] [19] [20] Varicose veins can be treated with foam sclerotherapy, endovenous laser treatment, radiofrequency ablation, or open
Sclerotherapy is one method for the treatment of spider veins, varicose veins (which are also often treated with surgery, radiofrequency, and laser ablation), and venous malformations. In ultrasound -guided sclerotherapy, ultrasound is used to visualize the underlying vein so the physician can deliver and monitor the injection.
The white-tailed spider (Lampona) was implicated for decades in necrotic lesions, but has been exonerated. [3] A study of 130 white-tailed spider bites found no necrotic ulcers or confirmed infections; only a red mark, local swelling, and itchiness. Very occasionally nausea, vomiting, malaise or headache may occur. [51]
A spider angioma or spider naevus (plural: spider naevi), also nevus araneus, is a type of telangiectasis [2] (swollen, spider-like blood vessels on the skin) found slightly beneath the skin's surface, often containing a central red spot and deep reddish extensions (see Blood color) which radiate outwards like a spider's web or a spider's legs.
Entelegyne: A spider whose female has an epigyne and separate ducts leading to spermathecae for sperm storage and to the uterus for fertilization, [6] creating a "flow-through" system; see haplogyne; see also Entelegynae; Basic arrangement of spider eyes, viewed from above Arrangement of eyes in most Salticidae, viewed from above
The pressure immobilisation technique is a first aid treatment used as a way to treat spider bite, snakebite, bee, wasp and ant stings in allergic individuals, blue ringed octopus stings, cone shell stings, etc. [1] [2] The object of pressure immobilisation is to contain venom within a bitten limb and prevent it from moving through the lymphatic system to the vital organs.
The LD50 of many poisons is known for humans but not that of spider venom. [citation needed] Serious bites develop symptoms quickly, within the hour. While a serious medical condition may result (see latrodectims and loxocelism) fatalities are exceedingly rare. Appropriate medical treatment can improve speed of recovery.
A review published in 2016 showed that 78% of 134 published medical case studies of supposed spider bites did not meet the necessary criteria for a spider bite to be verified. In the case of the two genera with the highest reported number of bites, Loxosceles and Latrodectus , spider bites were not verified in over 90% of the reports.
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