Endotracheal Tube (ETT) Depth and Tidal Volume Calculator
氣管內管深度與潮氣容積
Chula formula: ETT depth = 0.1 * [height (cm)] + 4
Ideal body weight (IBW), men = 50 kg + 2.3 * [height (in) – 60]
IBW, women = 45.5 kg + 2.3 * [height (in) – 60]
Usual tidal volume target = 6-8 (mL/kg)*IBW
來源：MDCalc；需人工判斷
MDCalc：https://www.mdcalc.com/calc/3928/endotracheal-tube-ett-depth-tidal-volume-calculator
MDCalc：https://www.mdcalc.com/calc/3928/endotracheal-tube-ett-depth-tidal-volume-calculator
HEAVEN Criteria
HEAVEN 困難插管預測
Hypoxemia / (Oxygen saturation value ≤93% at the time of initial laryngoscopy)
Extremes of size / (Pediatric patient ≤8 years of age or clinical obesity)
Anatomic challenge / (Include trauma, mass, swelling, foreign body, or other structural abnormality limiting laryngoscopic view)
Vomit/blood/fluid / (Clinically significant fluid present in the pharynx/hypopharynx at the time of laryngoscopy)
Exsanguination / (Suspected anemia that could potentially accelerate desaturation during RSI-associated apnea)
Neck / (Limited cervical range-of-motion due to immobilization or arthritis)
來源：MDCalc；Davis DP, Olvera DJ. HEAVEN criteria: Derivation of a new difficult airway prediction tool. Air Med J. 2017;36(4):195-197. doi:10.1016/j.amj.2017.04.001
MDCalc：https://www.mdcalc.com/calc/10675/heaven-criteria
MDCalc：https://www.mdcalc.com/calc/10675/heaven-criteria
SpO₂/FiO₂ Ratio
SpO₂/FiO₂ 比值
S/F Ratio = (SpO2 / FiO2) × 100
來源：MDCalc；Rice TW, Wheeler AP, Bernard GR, Hayden DL, Schoenfeld DA, Ware LB. Comparison of the sp o 2 /f io 2 ratio and the pa o 2 /f io 2 ratio in patients with acute lung injury or ards. Chest. 2007;132(2):410-417.
MDCalc：https://www.mdcalc.com/calc/10570/spo2-fio2-ratio
MDCalc：https://www.mdcalc.com/calc/10570/spo2-fio2-ratio
Centor Score (Modified/McIsaac) for Strep Pharyngitis
修正 Centor（McIsaac）咽炎評分
Age
Exudate or swelling on tonsils
Tender/swollen anterior cervical lymph nodes
Temp >38°C (100.4°F)
Cough
來源：MDCalc；需人工判斷
MDCalc：https://www.mdcalc.com/calc/104/centor-score-modified-mcisaac-strep-pharyngitis
MDCalc：https://www.mdcalc.com/calc/104/centor-score-modified-mcisaac-strep-pharyngitis
ROX Index for Intubation after HFNC
ROX Index（HFNC 插管風險）
ROX Index = SpO₂/FiO₂*, % / Respiratory rate, breaths/min
來源：MDCalc；Roca O, Messika J, Caralt B, et al. Predicting success of high-flow nasal cannula in pneumonia patients with hypoxemic respiratory failure: The utility of the ROX index. J Crit Care. 2016;35:200-5.
MDCalc：https://www.mdcalc.com/calc/10302/rox-index-intubation-hfnc
MDCalc：https://www.mdcalc.com/calc/10302/rox-index-intubation-hfnc