Hauv kev xyaum kho mob, isoflurane, ntau yam tshuaj loog tsis muaj zog, muaj ntau yam zoo dua lwm yam tshuaj loog. Vim nws cov khoom tshwj xeeb thiab cov ntaub ntawv muaj kev nyab xeeb zoo, qhov halogenated ether tau txais kev lees paub thoob plaws hauv zej zog kev kho mob. Vim nws qhov pib sai thiab offset ntawm kev ua,Isoflurane Tshuajtshwj xeeb tshaj yog pab tau rau ntau yam kev phais. Qhov no ua rau nws muaj peev xwm tswj tau qhov tob ntawm tshuaj loog. Vim nws cov pa roj carbon dioxide qis qis, nws tuaj yeem raug ntxias thiab rov zoo sai, uas txo cov neeg mob downtime thiab ua kom muaj txiaj ntsig hauv chav ua haujlwm. Tsis tas li ntawd, Isoflurane cov ntaub ntawv muaj kev nyab xeeb zoo heev tuaj yeem raug ntaus nqi rau nws cov metabolism hauv qis hauv lub cev, uas ua rau lub cev muaj zog tsawg dua nrog qee cov tshuaj loog laus. Vim nws cov teebmeem bronchodilatory thiab muaj peev xwm tswj tau cov hemodynamics ruaj khov thaum lub sijhawm phais, cov tshuaj yog qhov tshwj xeeb tshaj yog rau cov neeg mob uas muaj teeb meem ua pa. Isoflurane qhov muaj koob npe nyob rau hauv tib neeg thiab cov tsiaj kho tsiaj kuj yog vim nws cov nqi qis thiab kev sib raug zoo nrog ntau yam kev xa khoom. Isoflurane muaj qhov sib npaug profile uas sib xyaw ua haujlwm zoo, kev nyab xeeb, thiab yooj yim ntawm kev siv, ua rau nws nyiam xaiv rau ntau tus kws tshuaj loog thiab cov kws kho mob hauv ntau qhov chaw kho mob. Tsis muaj tshuaj loog yog tsis muaj kev pheej hmoo.
Peb muab Isoflurane Solution CAS 26675-46-7, thov xa mus rau lub vev xaib hauv qab no kom paub meej cov lus qhia tshwj xeeb thiab cov ntaub ntawv khoom.
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Pharmacological Properties thiab Mechanism of Action of Isoflurane
Chemical Structure thiab Physical Properties
Isoflurane, ib qho halogenated ether, muaj cov qauv tshuaj tshwj xeeb uas ua rau nws cov txiaj ntsig zoo li tshuaj loog. Nws cov qauv molecular, C3H2ClF5O, qhia txog qhov sib npaug ntawm halogen atoms uas cuam tshuam kev ruaj ntseg thiab tsis muaj zog. Lub xub ntiag ntawm fluorine atoms txhim kho nws cov lipid solubility, ua kom yooj yim dhau los ntawm cov kab mob lom. Cov cuab yeej no yog qhov tseem ceeb rau nws qhov pib nrawm nrawm thiab tshem tawm sai ntawm lub cev. Nyob rau hauv chav tsev kub, Isoflurane tshwm sim raws li cov kua ntshiab, tsis muaj xim nrog cov ntxhiab tsw me ntsis, hloov mus rau hauv cov pa thaum siv los ntawm cov tshuab tshuaj loog tshwj xeeb.
Pharmacokinetics thiab Biotransformation
Pharmacokinetics ntawm Isoflurane ua lub luag haujlwm tseem ceeb hauv nws cov khoom siv kho mob. Nws cov ntshav-gas partition coefficient ntawm 1.4 tso cai rau kom ceev sib npaug ntawm alveolar thiab arterial concentrations, uas ua rau kom ceev induction thiab tshwm sim los ntawm tshuaj loog. Cov yam ntxwv no tshwj xeeb tshaj yog muaj txiaj ntsig zoo hauv cov txheej txheem kho mob sab nraud uas qhov kev rov qab sai yog qhov tseem ceeb. Isoflurane tau dhau los ua biotransformation tsawg kawg hauv lub cev, tsuas yog li ntawm 0.2% metabolized hauv daim siab. Qhov txwv tsis pub metabolism no ua rau nws txoj kev nyab xeeb zoo, txo qhov kev pheej hmoo ntawm kev siv tshuaj hepatotoxicity piv rau qee cov tshuaj loog laus. Thawj txoj hauv kev ntawm kev tshem tawm yog los ntawm exhalation ntawm cov tshuaj tsis hloov pauv, ntxiv txo qhov muaj peev xwm rau cov teebmeem metabolic.
Mechanism of Action ntawm Cellular Level
Ntawm qib cellular, isoflurane tsim nws cov tshuaj loog los ntawm ntau yam txheej txheem. Nyob rau hauv lub hauv paus paj hlwb, nws feem ntau txo txoj kev excitatory thiab nce inhibitory neurotransmission. Cov tshuaj tsub kom qhov inhibitory los ntawm ligand-gated ion channels los ntawm kev cuam tshuam nrog lawv, tshwj xeeb tshaj yog GABAA receptors. Kev nthuav dav hyperpolarization ntawm neurons thiab txo qis synaptic kis tau los ntawm cov haujlwm no. Txhawm rau txhim kho nws cov tshuaj loog thiab tshuaj loog, isoflurane kuj hloov cov kev ua ntawm voltage-gated ion channels, xws li potassium thiab calcium channels. Cov kws kho mob tuaj yeem tswj hwm tus neeg mob lub xeev ntawm kev paub thiab cov lus teb rau kev phais mob los ntawm kev kho qhov tob ntawm cov tshuaj loog vim tias cov tshuaj muaj kev cuam tshuam los ntawm ntau lub hom phiaj molecular.
Kev siv tshuaj kho mob thiab ntau yam ntawm Isoflurane Solution
Isoflurane Tshuajtau ua kom pom tau qhov zoo tshaj plaws versatility nyob rau hauv ib tug dav spectrum ntawm kev phais tshwj xeeb. Hauv kev phais plawv, nws qhov cuam tshuam tsawg kawg nkaus ntawm lub plawv contractility thiab muaj peev xwm tswj tau qhov hemodynamics ruaj khov ua rau nws muaj txiaj ntsig zoo rau cov neeg mob uas muaj kev cuam tshuam ntawm cov hlab plawv. Neurosurgeons txaus siab rau Isoflurane lub peev xwm los txo cov paj hlwb metabolic thiab intracranial siab, cov khoom uas tseem ceeb heev thaum lub sij hawm ua haujlwm ntawm lub hlwb. Hauv kev siv tshuaj loog obstetric, cov tshuaj tshem tawm sai thiab tsawg kawg ntawm placental hloov chaw muab kev nyab xeeb rau leej niam thiab tus menyuam hauv plab. Pediatric anesthesiologists nyiam Isoflurane rau nws cov yam ntxwv tshwm sim uas tshwm sim tau thiab tsis tshua muaj tshwm sim tom qab kev ua haujlwm delirium hauv cov menyuam yaus. Cov tshuaj bronchodilatory teebmeem kuj ua rau nws muaj txiaj ntsig tshwj xeeb hauv kev phais thoracic thiab rau cov neeg mob uas muaj kab mob ua pa.
Dhau ntawm chav ua haujlwm,Isoflurane Tshuajpom cov ntawv thov hauv ntau yam kev kuaj mob thiab kev cuam tshuam. Nws qhov tob tswj tau ntawm sedation yog qhov zoo tagnrho rau kev tshawb fawb magnetic resonance imaging (MRI), qhov twg tus neeg mob tsis tuaj yeem yog qhov tseem ceeb rau cov duab zoo. Hauv kev cuam tshuam hluav taws xob, Isoflurane muab cov tshuaj loog txhim khu kev qha rau cov txheej txheem xws li endovascular stenting lossis qog embolization. Cov tshuaj sai titratability tso cai rau kev hloov kho sai hauv sedation theem thaum cov txheej txheem dynamic xws li endoscopy lossis bronchoscopy. Hauv kev kho electroconvulsive (ECT), Isoflurane cov khoom siv tshuaj tiv thaiv kab mob thiab cov ntaub ntawv rov qab sai ua rau nws xaiv qhov tsim nyog rau kev tswj hwm tshuaj loog. Cov ntawv thov sib txawv no qhia txog kev hloov pauv ntawm Isoflurane Solution hauv kev ua tau raws li cov kev xav tau tshuaj loog ntawm cov kev kho mob niaj hnub no.
Kev siv ntawm Isoflurane Solution txuas ntxiv dhau tib neeg cov tshuaj rau hauv kev coj noj coj ua thiab kev tshawb fawb. Hauv kev siv tshuaj loog kws kho tsiaj, nws txoj kev nyab xeeb thiab kev yooj yim ntawm kev tswj hwm ua rau nws haum rau ntau hom tsiaj, los ntawm cov tsiaj me me mus rau cov tsiaj txhu loj. Kev kwv yees kws tshuaj ntawm Isoflurane pab txhawb nws txoj kev siv hauv cov tsiaj qus thiab cov tshuaj zoo, qhov kev tswj xyuas meej txog qhov tob ntawm qhov tshuaj loog yog qhov tseem ceeb. Hauv kev tshawb fawb tsiaj hauv chaw soj nstuam, Isoflurane tau dhau los ua tus qauv tshuaj loog vim nws qhov cuam tshuam tsawg kawg nkaus rau cov txiaj ntsig kev sim thiab yooj yim ntawm kev siv ntau yam tsiaj. Nws daim ntawv thov hauv kev tshawb fawb tshuaj sib piv pab txuas qhov sib txawv ntawm kev tshawb fawb preclinical thiab tib neeg kev sim tshuaj, pab txhawb kev nce qib hauv kev tsim tshuaj thiab kev phais.
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Kev nyab xeeb Profile thiab kev txiav txim siab rau Isoflurane Administration
Nws yog ib qho tseem ceeb uas yuav tsum tau coj mus rau hauv tus account yuav ua li cas zooIsoflurane Tshuajua rau kev sib piv rau lwm cov tshuaj loog siv dav siv thaum ntsuas nws qhov profile kev nyab xeeb. Isoflurane muaj qhov txo qis ntawm hepatotoxicity thiab malignant hyperthermia hauv kev sib piv rau ntau cov tshuaj halogenated xws li halothane. Piv rau enflurane, nws feem ntau muaj kev mob plawv tsawg dua, nrog rau kev nyuaj siab myocardial tsawg dua. Isoflurane muaj tsawg dua li propofol ua rau mob hnyav, tshwj xeeb tshaj yog rau cov neeg laus lossis cov neeg tsis zoo. Piv nrog rau kev txhaj tshuaj loog, uas tau ua rau kev ua haujlwm hepatic ntau, cov tshuaj noj cov metabolism tsawg kawg kuj ua rau txo qis ntawm cov tshuaj sib cuam tshuam. Isoflurane muaj qee yam phom sij, txawm li cas los xij, zoo li lwm yam tshuaj loog. Thaum noj tshuaj ntau, nws tuaj yeem ua rau lub paj hlwb vasodilation thiab koob tshuaj ua pa nyuaj siab.
Kev saib xyuas zoo thiab kev tswj hwm yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb ntawm Isoflurane kev tswj hwm. Kev saib xyuas tshuaj loog, suav nrog kev siv hluav taws xob tas li, ntsuas ntshav siab tsis ua pa, pulse oximetry, thiab capnography, yog qhov tseem ceeb. Qhov kawg-tidal concentration xyuas ntawm Isoflurane tso cai rau cov titration meej ntawm cov tshuaj loog qhov tob, txo qhov kev pheej hmoo ntawm kev paub lossis kev noj ntau dhau. Kev ntsuas kub yog qhov tseem ceeb vim Isoflurane lub peev xwm ua rau tsis zoo rau thermoregulation. Hauv cov neeg mob uas raug mob, kev saib xyuas neuromuscular yuav raug ua haujlwm los ntsuam xyuas cov qib ntawm cov leeg nqaij so thiab qhia kev thim rov qab ntawm neuromuscular blockade. Kev tswj kom zoo ntawm Isoflurane tshuaj loog kuj tseem yuav tsum tau ua tib zoo saib xyuas qhov tsis ua pa, vim tias cov tshuaj tuaj yeem ua rau muaj kev nyuaj siab ntawm kev ua pa. Cov kws kho mob tshuaj loog yuav tsum tau ceev faj txog cov tsos mob ntawm malignant hyperthermia, txawm hais tias tus mob no tsis tshua muaj Isoflurane piv rau cov laus cov neeg ua haujlwm halogenated. Tsis tu ncua calibration thiab kev saib xyuas ntawm kev siv tshuaj loog yog qhov tseem ceeb los xyuas kom meej qhov koob tshuaj thiab tiv thaiv cov teeb meem cuam tshuam nrog cov khoom siv.
Txawm hais tias cov tshuaj isoflurane feem ntau zam tau zoo, muaj qee yam kev phom sij uas yuav tsum tau paub txog. Kev poob qis ntawm kev ua pa ntawm lub ntsws thiab ntshav siab yog qhov tshwm sim tshwm sim. Txawm hais tias nws tshwm sim tsawg dua li nrog rau lwm yam tshuaj loog, qee tus neeg yuav muaj xeev siab thiab ntuav tom qab. Lub raum tsis ua haujlwm thiab hepatotoxicity yog qhov tsis tshua muaj tshwm sim tab sis muaj kev phom sij txaus ntshai, tshwj xeeb tshaj yog rau cov tib neeg uas twb muaj lub cev puas tsuaj. Isoflurane tuaj yeem ua rau malignant hyperthermia hauv cov neeg tsis muaj zog, uas hu rau kev kuaj mob sai thiab saib xyuas. Cov tshuaj yuav tsum tsis txhob siv rau cov tib neeg uas muaj kev paub lossis xav tias muaj keeb kwm yav dhau los rau malignant hyperthermia. Vim tias isoflurane tuaj yeem ua rau lub hlwb vasodilation, nws raug nquahu kom cov neeg uas muaj lub siab intracranial siab ceev faj. Txawm hais tias raug suav tias muaj kev nyab xeeb heev, kev siv isoflurane hauv cov neeg cev xeeb tub yuav tsum raug soj ntsuam tiv thaiv kev txhawj xeeb.
Hauv kev xaus,Isoflurane Tshuajmuaj ntau yam zoo hauv kev siv tshuaj loog, suav nrog nws qhov pib sai thiab offset, cov metabolism tsawg tsawg, thiab siv tau ntau yam thoob plaws ntau yam kev phais thiab kev kho mob. Nws txoj kev ruaj ntseg profile zoo, thaum siv kom tsim nyog, ua rau nws yog ib qho cuab yeej tseem ceeb hauv cov tshuaj anesthesiologist's armamentarium. Ib yam li kev cuam tshuam kev kho mob, cov txiaj ntsig ntawm Isoflurane yuav tsum ua tib zoo sib npaug tiv thaiv cov kev pheej hmoo, thiab kev siv nws yuav tsum raug kho raws li tus neeg mob xav tau thiab cov xwm txheej kho mob. Kev tshawb fawb tsis tu ncua thiab kev kho mob txuas ntxiv ua kom peb nkag siab txog Isoflurane lub luag haujlwm hauv kev siv tshuaj loog niaj hnub, ua kom nws muaj feem cuam tshuam ntxiv rau kev saib xyuas neeg mob kom nyab xeeb thiab muaj txiaj ntsig.
Cov ntaub ntawv
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Campagna, JA, Miller, KW, & Forman, SA (2003). Mechanisms ntawm kev ua ntawm inhaled anesthetics. New England Journal of Medicine, 348(21), 2110-2124.
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Sakai, EM, Connolly, LA, & Klauck, JA (2005). Inhalation anesthesiology thiab volatile kua tshuaj loog: tsom rau isoflurane, desflurane, thiab sevoflurane. Pharmacotherapy: Phau ntawv Journal of Human Pharmacology and Drug Therapy, 25(12), 1773-1788.
Constantinides, C., & Murphy, K. (2016). Molecular thiab integrative physiological teebmeem ntawm isoflurane tshuaj loog: lub paradigm ntawm cov hlab plawv cov kev tshawb fawb nyob rau hauv nas siv magnetic resonance imaging. Frontiers in Cardiovascular Medicine, 3, 23.
Edmond I Eger, II (2001). Hnub nyoog, yam tsawg kawg nkaus alveolar anesthetic concentration, thiab yam tsawg kawg nkaus alveolar anesthetic concentration - tsaug zog. Cov tshuaj loog & tshuaj loog, 93(4), 947-953.