Critical Info for those that Care
Practical ICU, ED, Anaesthesia and Pre-Hospital resources: Calculators, ECMO tools, Kit Lists and Decision-Support content.
Calculators
Practical bedside calculators for ICU and emergency care.
ECMO
VV, VA, and hybrid ECMO tools, physiology, and practical guides.
Equipment
Critical care equipment explained, compared, and applied.
Kit Lists
Critical Care-ready equipment kits and configurations.
Databases
Curated clinical databases and reference tools.
Education
Teaching resources, clinical frameworks, and decision-making tools.
Infusion Dose Calculator
Convert between μg/kg/min, μg/min, and mL/h in real time.
ECMO Sweep Gas iNO Calculator
Calculate oxygen fraction and gas flow in ECMO circuits using oxygenator nitric oxide as a regional anticoagulant.
Oxygen Flow Rate
Convert between high flow fractional, and low flow pure oxygen rates.
Oxygenation Index Calculator
Assess oxygenation severity and guide escalation decisions.
Relative Tube Thickness
Convert between Fr, G and mm in real time.
Cross-Sectional Area Occlusion Calculator
Calculate the cross-sectional area occlusion of a tube within another tube, such as an ECMO cannula within a femoral vein.
APRV Tlow Timing
Expiratory flow timing
One photo. Three draggable lines.
Straighten the baseline, set the time scale, then fit the expiratory decay from its peak. Measure time to 75% remaining flow.
Photos stay in this browser tab; this tool does not upload or automatically save them. Unvalidated research prototype · v0.3.0.
Lines, not menus
Move a point
Touch and drag an endpoint. Holding or dragging opens a magnifier above it. You can also tap an endpoint, then tap its new position. Drag the line itself to move both ends. Drag empty space to pan; pinch to zoom. Pinching does not move saved points.
1 · Baseline and rotation
Place both ends on the same zero-flow baseline, left and right. “Straighten & next” makes that line horizontal without repeatedly resampling the image. Editing this baseline later resets the time scale and decay fit.
2 · Time scale
Drag A and B to two known time marks, then enter their separation in seconds. The horizontal distance determines the scale. Dragging either endpoint vertically moves the whole time line.
3 · Peak and decay
Put Peak at the expiratory-flow maximum. Fit the other end to the visible decelerating flow envelope, through and preferably just beyond the 75% level. Confirm only when the line represents that visible part of the waveform.
What is calculated?
The target retains 75% of the peak’s distance from zero. A peak of −60 L/min therefore targets −45 L/min. The result is the horizontal distance from Peak to that level on your fitted straight line, multiplied by the time scale.
This is a linear approximation, not an automatically traced curve or an exponential fit. A curved envelope may not match one straight line. The app cannot verify your chosen points. It will not extrapolate beyond the fitted segment; do not fit to the abrupt return to inspiration.
Not the complete release duration
This result starts at peak expiratory flow. It excludes any pressure-release-to-peak interval and does not prescribe the low-pressure release duration in airway pressure release ventilation (APRV).
Photographs and precision
Use a sharp, frozen, front-on graph with a linear time axis. Baseline rotation fixes tilt, not perspective distortion. “Fit photo” shows the whole image without stretching; pinch to inspect the relevant breath. Zoom does not add image detail.
Privacy
The app makes no image uploads or automatic saves. Saving a measurement is an explicit download of geometry and derived values, not the source photograph. This does not control the surrounding website’s analytics or other plugins.
v0.3.0 · Manual linear-envelope method · Unvalidated research prototype. The magnifier is an in-page touch control, not Apple’s native text-selection loupe.
EXPERIMENTAL: ARDS 60-day mortality v2
60-Day Mortality Prediction Five-variable MARS model Age 49 years Exact value years PaO₂ 8.0 kPa Exact value kPa PaCO₂ 7.0 kPa Exact value kPa Lactate 1.5 mmol/L Exact value mmol/L Hospital admission to referral 6 days Exact value days Arterial pH 7.30 Exact value Derived variable PaO₂ / PaCO₂ ratio: 1.143 Predicted 60-day mortality: —…
ECMO Oxygenators
ECMO Sweep Gas and Oxygen Fraction Calculator
Calculate delivered oxygen fraction accounting for sweep gas flow and nitric oxide admixture in ECMO circuits.
About CriticalCare.info
CriticalCare.info is a clinician-built resource focused on practical tools for critical care medicine, wherever you practice it.
It brings together calculators, equipment guides, and clinical resources designed for real-world bedside use.