SNAP Score Calculator

This SNAP score calculator reproduces the rapid assessment logic in the supplied source page. It assigns points to systolic blood pressure, heart rate, respiratory rate, temperature, oxygen saturation, consciousness, pain, and age. Measurements in a specified normal band receive zero points, moderately abnormal measurements receive one point, and more extreme values usually receive three points. Confusion contributes two points, unresponsiveness contributes three, and advanced age contributes up to two. For systolic pressure, 90 through 140 mmHg scores zero, 70 through 89 or 141 through 180 scores one, and values outside those ranges score three. Heart rates from 60 through 100 and respiratory rates from 12 through 20 score zero. Temperature from 36.5 through 37.5 degrees Celsius and oxygen saturation of at least 95 percent also score zero. Pain from zero through three scores zero, pain from four through seven scores one, and higher pain scores receive three. The calculator adds all parameter points. Totals through 10 are labeled low risk, scores from 11 through 20 are moderate risk, and scores from 21 through 30 are high risk. The source also defines a critical category above 30, although the available fields and their maximum point values make that category unreachable under the reproduced rules. This detail is preserved instead of silently changing the source thresholds. A score is only as reliable as its measurements. Confirm unusual vital signs with correctly sized and calibrated equipment, and consider whether movement, anxiety, supplemental oxygen, medication, fever treatment, or measurement technique affected the reading. Consciousness should reflect the current clinical state rather than the patient's usual behavior. Pain is subjective and should be communicated and treated seriously even when it contributes relatively few points. This tool is educational and is not a substitute for a validated institutional early-warning system, diagnosis, triage protocol, or professional judgment. The label SNAP is used for several different scoring systems in medicine, including neonatal severity scores, and this particular simplified model should not be assumed equivalent to those validated instruments. A patient with alarming symptoms can need emergency treatment despite a low total, while an isolated abnormal reading may require confirmation. Call emergency services for severe breathing difficulty, chest pain, new confusion, unconsciousness, blue coloration, signs of shock, or other immediately dangerous symptoms. Clinicians should follow local escalation policy and use the complete history, examination, laboratory data, and trend over time.