Tib txoj kev txhim khu kev qha ntawm kev ntsuas methemoglobin concentration thiab lees paub qhov kev kuaj mob ntawm methemoglobinemia yog CO-oximetryFeem ntau cov ntshav ntsuas roj ntshav niaj hnub no muaj qhov sib koom ua ke CO-oximeter, uas tso cai rau cov ntshav mus rau hauv cov ntshav. yuav spectrophotometrically soj ntsuam ntawm ntau wavelengths.
Puas pulse oximeter ntes methemoglobin?
Keeb kwm: Methemoglobin hauv cov ntshav tsis tuaj yeem kuaj pom los ntawm cov pa pulse oximetry, txawm hais tias nws tuaj yeem ua rau oximeter qhov kwv yees (Spo2) ntawm qhov tseeb arterial functional oxygen saturation (Sao2).
qib methemoglobin ib txwm yog dab tsi?
Lub cev lub cev ntawm methemoglobin hauv cov ntshav yog 0% rau 2% Methemoglobin concentrations ntawm 10% mus rau 20% yog zam tau zoo, tab sis qib saum toj no feem ntau cuam tshuam nrog cov tsos mob. Qib siab tshaj 70% tuaj yeem ua rau tuag taus. Cov tsos mob kuj nyob ntawm qhov nrawm ntawm nws qhov tsim.
Vim li cas PaO2 li qub hauv methemoglobinemia?
Methemoglobin absorbs lub teeb ntawm ob qho tib si ntawm cov wavelengths, yog li qhov muaj cov hemoglobin ntxiv no ua rau SpO2 xam tsis raug. Arterial blood gas ntsuas ntawm PO2 tsis cuam tshuam los ntawm methemoglobin, ua rau ib txwm muaj (thiab feem ntau nce siab vim cov pa ntxiv) suav SaO2.
PO2 yog dab tsi hauv methemoglobinemia?
Arterial blood gas (ABG) nthuav tawm PO2=285 mm Hg nrog nce qib MetHb (44%). Ntawm cov pa oxygen ntxiv tau nce hauv PO2 txog 400 mm Hg tab sis SPO2 tseem nyob ntawm 90%. Cov ntawv lim tau ua tiav pom tias muaj xim tsis zoo (piv rau qhov qub).
