Venous blood pH calculator

What venous blood pH means and which bands this calculator uses

They are not the same as acidosis and alkalosis, which name the metabolic or respiratory process that produced the state and would require PCO2, bicarbonate, and anion-gap context this endpoint does not accept. Send the required field ph as a finite number or numeric string; aliases venous_ph, blood_ph, value, and ph_value are accepted. The plausible physiologic window is 6.5 through 8 inclusive: values below 6.5 or above 8 fail with invalid_input instead of being clamped into acidemia or alkalemia. Identical inputs always yield identical JSON because the algorithm never touches a network, a model, a clock, or a random generator. This is an educational classification of a single number, not a diagnostic medical device.

Input contract, response shape, and error behaviour

In_reference is true only when classification is normal. Boundary values 7.31 and 7.41 are normal. POST a JSON body with the required finite number ph. The field may arrive as a JSON number or as a numeric string; missing fields, empty strings, booleans, and non-finite values fail with invalid_input naming ph. A reading outside the plausible range 6.5 to 8 also fails with invalid_input, and those failures are not billed. On success the body echoes ph with stable rounding, sets classification to the machine key acidemia, normal, or alkalemia, and sets classification_label to the matching human phrase for chips and reports. Reference_low is 7.31, reference_high is 7.41, and reference_range is the compact string 7.31-7.41 so clients can print the interval without re-hardcoding it. Plausible_min and plausible_max restates the 6.5-to-8 window that was enforced. Method is always venous_blood_ph_bands so downstream code can distinguish this landing from arterial tables or chemistry calculators. Example: ph 7.36 is normal and in_reference true; ph 7.22 is acidemia; ph 7.48 is alkalemia. Use classification for filters and analytics, classification_label for user-facing copy, and the echoed ph when you only need a display line. Do not confuse this endpoint with arterial blood-gas full panels, blood-pressure category tools, chemistry strong-acid pH solvers, or converters between milligrams per decilitre and millimoles per litre — those are different search intents and different contracts.

API usage, pricing, product workflows, and practical limits

Call the free in-browser venous blood pH calculator for classroom demos, nursing skills labs, and quick personal checks without reimplementing the 7.31-to-7.41 table in every spreadsheet. Source inputs follow the same retention rules as other KIT parse items, and results are safe to pin in tests because the algorithm is fully deterministic. Keep expectations educational: a single venous pH does not replace a full blood-gas interpretation, does not identify the process behind the number, and does not substitute for professional medical advice when a person has symptoms, known acid-base disease, or an unexpected laboratory flag. Send a JSON body with the required venous pH. Use the prepaid API when a health SaaS, telehealth intake form, electronic worksheet, or school LMS needs a stable contract under prepaid KIT balance at $0.002 per successful item; validation failures never consume balance after the engine rejects the request. Pair this endpoint with your own sample workflow — correct venous technique, timely analysis, and temperature handling — then store classification alongside the raw pH for dashboards and export CSV columns for ph, classification, reference_range, and method. Authors shipping SDKs can map classification and classification_label into colour bands and alert thresholds — the same ordered labels students learn when they first separate acidemia from alkalemia.