2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Phenylephrine yog sympathomimetic tus neeg sawv cev uas yog siv los kho cov iris yam tsis muaj cycloplegia cycloplegia Cycloplegic tshuaj feem ntau yog muscarinic receptor blockers. Cov no suav nrog atropine, cyclopentolate, homatropine, scopolamine thiab tropicamide. Lawv tau qhia rau siv nyob rau hauv cycloplegic refraction (kom tuag tes tuag taw cov leeg ciliary thiaj li txiav txim siab qhov tseeb refractive yuam kev ntawm lub qhov muag) thiab kev kho mob ntawm uveitis. https://en.wikipedia.org › wiki › Cycloplegia
Cycloplegia - Wikipedia
. Phenylephrine (2.5%) yog siv diagnostically rau fundus kev kuaj mob, thiab 10% phenylephrine yog siv kho mob los ua txhaum posterior synechiae thiab pupillary block.
Cycloplegic tshuaj yog dab tsi?
Cycloplegic tshuaj feem ntau yog muscarinic receptor blockers. Cov no suav nrog atropine, cyclopentolate, homatropine, scopolamine thiab tropicamide. Lawv tau qhia rau siv nyob rau hauv cycloplegic refraction (kom tuag tes tuag taw cov leeg ciliary thiaj li txiav txim siab qhov tseeb refractive yuam kev ntawm lub qhov muag) thiab kev kho mob ntawm uveitis.
Vim li cas tropicamide ua ke nrog phenylephrine?
Tus parasympathetic antagonist tropicamide thiab tus sympathetic agonist phenylephrine feem ntau yog siv los ua kom tiav dilation hauv qhov chaw kho mob . Hauv kev kawm ob lub qhov muag no, Siderov thiab Tus Kws Saib Xyuas Neeg Mob 3 tau tshaj tawm tias ob zaug qhov koob tshuaj ib txwm muaj ntawm 0.5% tropicamide tau ua tiav cov menyuam kawm ntawv loj dua.loj dua ib koob.
Yuav ua li cas cov tshuaj dilating tsis muaj Cycloplegic action?
Phenylephrine ib leeg yuav muab kev nthuav dav yam tsis muaj cycloplegia. Nws feem ntau siv ua ke nrog cov tshuaj anticholinergics los tsim kom muaj qhov siab tshaj plaws ntawm cov menyuam kawm ntawv.
Mydriatics thiab Cycloplegics yog dab tsi?
Cycloplegics/mydriatics yog tshuaj kho mob ophthalmic uas yog siv los nthuav cov menyuam kawm ntawv (mydriasis). Txhua yam tshuaj cycloplegic/mydriatic ua haujlwm nyob rau hauv ib txoj kev sib txawv los tswj kev dilation hauv cov menyuam kawm ntawv rau lub sijhawm teev tseg.
Pom zoo:
Puas yog txhua tus mydriatics tseem yog cycloplegic?
Tag nrho cov cycloplegics kuj yog mydriatic (cov tub ntxhais kawm dilating) cov neeg ua haujlwm thiab siv xws li thaum kuaj qhov muag kom pom kev zoo dua ntawm retina. Qhov twg mydriatic tsis tsim cycloplegia? Phenylephrine yog cov tshuaj siv ntau tshaj plaws hauv pawg no.
Vim li cas cycloplegic refraction?
Cycloplegic refraction yog txheej txheem siv los txiav txim siab ib tus neeg qhov ua tiav refractive yuam kev los ntawm kev so ib ntus cov leeg uas pab ua kom pom qhov muag. Cycloplegic qhov muag tee yog siv los so ib ntus ntawm lub cev ciliary, lossis tsom cov leeg, ntawm ob lub qhov muag.
Ib qho ntawm cov hauv qab no yog tus neeg sawv cev cycloplegic?
Cycloplegic tshuaj feem ntau yog muscarinic receptor muscarinic receptor Cov tshuaj nrog muscarinic antagonist kev ua haujlwm tau dav siv hauv cov tshuaj, hauv kev kho mob plawv qis, zais zis ntau dhau, teeb meem ua pa xws li mob hawb pob thiab COPD, thiab cov teeb meem neurological xws li Parkinson's disease.
Phenylephrine metabolized nyob qhov twg?
Phenylephrine feem ntau metabolised hauv lub plab phab ntsa thiab daim siab[1, 8]. Txoj hauv kev tseem ceeb ntawm cov metabolism yog sulphation thiab glucuronidation ntawm 3-hydroxyl pawg thiab oxidative deamination los ntawm monoamine oxidase rau 3-hydroxymandelic acid thiab 3-hydroxyphenylglycol.
Thaum twg siv phenylephrine vs levophed?
Norepinephrine (Levophed): tsis cuam tshuam rau CO tsuas yog nce me me ntawm koob tshuaj tsawg. Thawj tshuaj ntawm xaiv hauv cov neeg mob septic. Phenylephrine (Neosynephrine) yog ib qho ntshiab α1-agonist thiab zoo tagnrho rau cov neeg mob hypotension thiab tachycardia.
