Oximeter Buyer's Guide
Lub ntsiab ntsuas ntsuas ntawm oximeter yog pulse rate, ntshav oxygen saturation, thiab perfusion Performance index (PI). Ntshav oxygen saturation (SpO2 luv luv) yog ib qho ntawm cov ntaub ntawv tseem ceeb hauv cov tshuaj kho mob. Oxygen saturation yog hais txog qhov feem pua ntawm O2 ntim hauv cov ntshav tag nrho ntawm tag nrho O2 ntim.
Tswj pawg ntawm oximeters
Kev tswj hwm qeb ntawm oximeter: Chav II kho mob
Oximeter ntsuas ntsuas
Lub ntsiab ntsuas ntsuas ntawm oximeter yog pulse rate, ntshav oxygen saturation, thiab perfusion Performance index (PI).
Pulse rate: Pulse yog lub pulsation ntawm cov hlab ntsha superficial. Ib tug tib neeg lub plawv dhia thiab lub plawv dhia yog tib yam.
Lub plawv dhia yog qhov zaus uas lub plawv dhia. Tus neeg nruab nrab yog nyob nruab nrab ntawm 60-90 neeg ntaus ib feeb. Txawm li cas los xij, thaum tib neeg tawm dag zog thiab ntxhov siab, lawv lub plawv dhia yuav nce ntxiv.
Pulse rate yog tus naj npawb ntawm pulses ib feeb.
Feem ntau cov mem tes thiab lub plawv dhia yog tib yam. Cov mem tes qis qis dua lub plawv dhia thaum lub sij hawm atrial fibrillation los yog nquag ua ntej ntxov ntxov.
Ntshav oxygen saturation: Ntshav oxygen saturation (oxygen saturation abbreviated as SO2) yog ib qho ntawm cov ntaub ntawv tseem ceeb hauv cov tshuaj kho mob.
Cov pa oxygen noj los ntawm tib neeg lub cev feem ntau yog los ntawm hemoglobin (muaj plaub hom hemoglobin hauv cov ntshav ib txwm muaj: oxyhemoglobin (HbO2), txo hemoglobin (Hb), carboxyhemoglobin (CoHb), thiab methemoglobin (MetHb).
Ntawm lawv, hemoglobin txo qis yog thim rov qab nrog oxygen, thiab carboxyhemoglobin thiab methemoglobin tsis ua ke nrog oxygen. ) nqa los ntawm oxygen. Feem ntau, cov ntsiab lus oxygen hauv cov ntshav yog hais txog tus nqi ntawm oxyhemoglobin hauv cov ntshav. Lub cev kom muaj nuj nqis ntawm cov ntshav oxygen saturation yog siv los piav txog kev hloov pauv ntawm cov ntsiab lus oxygen hauv cov ntshav.
Oxygen saturation yog hais txog qhov feem pua ntawm O2 ntim hauv cov ntshav tag nrho ntawm tag nrho O2 ntim.
Cov pa oxygen saturation ntawm tib neeg cov ntshav arterial yog 98 feem pua thiab cov ntshav venous yog 75 feem pua.
Nws yog ib qho tseem ceeb qhia kom muaj kev cuam tshuam cov pa oxygen hauv lub cev. Nws feem ntau ntseeg tias tus nqi ntawm cov ntshav oxygen saturation yuav tsum tsis txhob qis dua 94 feem pua, thiab qis dua 94 feem pua yog suav tias yog cov pa oxygen tsis txaus.
Perfusion Index (PI): Feem ntau PI yog siv los ua qhov ntsuas ntsuas qhov ntsuas, uas tuaj yeem cuam tshuam lub limb perfusion xwm txheej ntawm tus neeg kuaj, qhia pom qhov tseeb ntawm lub tshuab. Ntawd yog, nws tseem tuaj yeem kuaj pom nyob rau hauv cov xwm txheej ntawm qhov tsis muaj perfusion thiab tsis muaj zog perfusion.
Ntxiv mus, los ntawm cov zaub ntawm PI, nws kuj tuaj yeem qhia qhov teeb meem ntawm tus neeg mob tus kheej limb mob, uas yog, thaum tsis tshua muaj perfusion tshwm sim, nws qhia tau hais tias tus neeg mob puas muaj nws tus kheej ua rau, xws li teeb meem plawv, poob siab, thiab lwm yam. tuaj yeem cuam tshuam Txawm tias muaj lwm yam xwm txheej xws li huab cua txias, tsis zoo peripheral ncig, thiab lwm yam, thiaj li txiav txim siab los ntawm cov xwm txheej saum toj no!
PI yog hais txog qhov ntsuas perfusion (Perfusion Index, PI), thiab tus nqi PI qhia txog cov ntshav pulsatile, uas yog, cov ntshav perfusion muaj peev xwm. Qhov ntau dua cov ntshav pulsatile, qhov ntau dua cov pulsatile tivthaiv thiab qhov ntau dua tus nqi PI.
Yog li ntawd, ob qho tib si qhov chaw ntsuas (tawv nqaij, rau tes, pob txha, thiab lwm yam) thiab tus neeg mob cov ntshav perfusion (arterial blood flow) yuav cuam tshuam rau tus nqi PI. Txij li cov paj hlwb muaj txiaj ntsig cuam tshuam rau lub plawv dhia thiab ntshav siab (tshwj xeeb rau cov hlab ntsha pulsatile cov ntshav ntws), lub cev neuromodulation system lossis lub siab lub ntsws kuj cuam tshuam tsis ncaj rau PI qhov tseem ceeb. Yog li ntawd, nyob rau hauv cov tshuaj loog sib txawv, tus nqi PI kuj yuav txawv.
Taw qhia ntawm ntiv tes clip oximeter
Los ntawm kev tsav tsheb ib qho liab LED (660nm) thiab infrared LED (910nm).
Cov kab xiav sawv cev rau qhov nkhaus induction ntawm lub raj txais kom txo hemoglobin thaum hemoglobin tsis nqa oxygen molecules. Los ntawm daim duab, nws tuaj yeem pom tias qhov txo qis hemoglobin absorbs 660nm liab lub teeb kuj muaj zog, thaum qhov nqus ntev rau 910nm infrared lub teeb kuj tsis muaj zog.
Cov kab liab sawv cev rau qhov nkhaus induction ntawm lub raj xa mus rau oxyhemoglobin thaum hemoglobin thiab cov qe ntshav liab nrog oxygen molecules tam sim no. Nws tuaj yeem pom los ntawm daim duab tias qhov nqus ntawm lub teeb liab ntawm 660 nm yog qhov tsis muaj zog, thiab qhov nqus ntawm lub teeb infrared ntawm 910 nm yog qhov muaj zog heev.
Hauv kev ntsuas ntshav oxygen, qhov sib txawv ntawm qhov txo qis hemoglobin thiab oxygenated hemoglobin los ntawm kev txheeb xyuas qhov sib txawv ntawm ob hom kev nqus lub teeb ntawm qhov sib txawv wavelengths yog cov ntaub ntawv yooj yim tshaj plaws rau kev ntsuas ntshav oxygen saturation.
Hauv kev kuaj ntshav oxygen, 660nm thiab 910nm yog ob lub wavelengths tshaj plaws. Qhov tseeb, kom ua tiav qhov tseeb dua, ntxiv rau ob lub wavelengths, txawm tias mus txog 8 wavelengths, lub ntsiab yog vim li cas tib neeg hemoglobin tsis tsuas yog txo qis rau hemoglobin. Ntxiv nrog rau oxyhemoglobin, muaj lwm yam hemoglobin, peb feem ntau pom carboxyhemoglobin, thiab ntau lub wavelengths yuav pab koj ua tau zoo dua.
Cov neeg siv tau rau oximeter
1. Cov neeg muaj kab mob vascular (mob plawv, mob ntshav siab, hyperlipidemia, cerebral thrombosis)
2. Cov neeg muaj kab mob ua pa (asthma, bronchitis, chronic bronchitis, pulmonary heart disease, chronic obstructive pulmonary disease...)
3. Cov laus tshaj 60 xyoo
4. Cov neeg ua haujlwm ntau tshaj 12 teev hauv ib hnub
5. Kev saib xyuas cov ntshav oxygen hauv cov kis las hnyav thiab alpine hypoxia ib puag ncig
6. Cov neeg haus cawv ntev