Acid-Base Analyser

Awaiting input

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Decision path

Calculated values

Calc. pH

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Henderson-Hasselbalch

Corr. AG

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Na−(Cl+HCO₃)+0.25×(44−Alb)

HCO₃ gap

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Na−Cl−36 (delta-delta)

SID gap

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SIDapp − SIDeff

Reference ranges

pH (7.35–7.45)

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PaCO₂ (35–45 mm Hg)

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HCO₃⁻ (22–28 mmol/L)

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Strong ion gap & BDE gap

K⁺

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mmol/L

Ca²⁺

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mmol/L

Mg²⁺

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mmol/L

Lactate

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mmol/L

PO₄

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mmol/L

+ve Std BD

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mmol/L

SIG (XA)

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BDE Gap

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SIG = (Na⁺ + Ca²⁺ + Mg²⁺ + K⁺) − (Cl⁻ + Lactate) − (HCO₃⁻ + Albumin × (0.123 × pH − 0.631) + PO₄ × (0.309 × pH − 0.469))
BDE Gap = −(Std Base Deficit) − (Na⁺ − Cl⁻ − 38) + 0.25 × (42 − Albumin)

Interpretation

Step 1 — download template

Download the Excel template, fill in your cases (one per row), then import it below. All columns with a * are required for the ABG diagnosis; electrolyte and SIG columns are used where provided.

Step 2 — import completed file

Click to choose file or drag & drop

.xlsx or .csv accepted