What is the Glasgow Coma Scale?

The GCS is a 3–15 point scale that assesses level of consciousness based on eye opening, verbal response, and motor response. A GCS of 13–15 is classified as mild brain injury, 9–12 as moderate, and 3–8 as severe. It is the most widely used neurological assessment tool in emergency settings.

When should I use the Wells Score vs the PERC Rule?

Use the PERC Rule first in low-risk patients to rule out pulmonary embolism without any testing. If PERC criteria are not met, use the Wells Score to estimate pre-test probability and guide whether to order D-dimer or proceed directly to CT pulmonary angiography.

What is qSOFA and when is it used?

qSOFA (quick Sequential Organ Failure Assessment) is a bedside screening tool for sepsis using three criteria: altered mental status, respiratory rate ≥22, and systolic BP ≤100 mmHg. A score ≥2 suggests possible sepsis and should prompt further evaluation with the full SOFA score.

Emergency Medicine Calculators & Scoring Tools

Critical decision-support tools for emergency medicine including Glasgow Coma Scale, APACHE II, Wells Score, CURB-65, PERC Rule, qSOFA, and the Canadian Head CT Rule. Designed for rapid bedside assessment and triage.

This category currently includes 14 tools, including Wells Score (DVT), Wells Score (PE), and CURB-65 Score.

These resources are built for clinicians, trainees, and medically informed patients who need fast bedside calculations. Use the results as decision support and pair them with full clinical context and local guidelines.

All Emergency Tools (14)

Wells Score (DVT)

Calculate the Wells Score to assess the clinical probability of deep vein thrombosis (DVT). Guide diagnostic workup and D-dimer testing.

Wells Score (PE)

Calculate the Wells Score to estimate the clinical probability of pulmonary embolism (PE). Guide decisions on CTPA and D-dimer testing.

CURB-65 Score

Calculate the CURB-65 score to assess pneumonia severity and determine the need for hospitalization or ICU admission.

Glasgow Coma Scale

Calculate the Glasgow Coma Scale score to assess level of consciousness. Used worldwide in emergency medicine and trauma assessment.

APACHE II Score

Calculate the APACHE II score to predict ICU mortality risk. Uses acute physiological variables, age, and chronic health status.

PERC Rule

Apply the PERC Rule to rule out pulmonary embolism in low-risk patients without D-dimer testing. Reduces unnecessary testing.

Shock Index

Calculate the Shock Index (HR/SBP ratio) for rapid hemodynamic assessment. Normal: 0.5–0.7. Score ≥1.0 indicates hemodynamic compromise; ≥1.4 indicates severe shock requiring immediate intervention.

qSOFA Score

Calculate the qSOFA score for rapid bedside sepsis screening. Score ≥2 (altered mentation, RR ≥22, SBP ≤100 mmHg) identifies patients at high risk for poor outcomes — no labs required.

SOFA Score

Calculate the SOFA score to assess organ dysfunction severity in critically ill patients. Scores range from 0 to 24 across six organ systems.

SIRS Criteria

Evaluate SIRS criteria for systemic inflammatory response. Two or more criteria (temperature, HR, RR, WBC) indicates SIRS. Note: Sepsis-3 definitions now prefer qSOFA and SOFA scoring.

Parkland Formula

Calculate IV fluid requirements for burn patients using the Parkland formula: 4 mL × kg × % TBSA in 24 hours. Half given in first 8 hours from injury, half over next 16 hours.

Revised Trauma Score

Calculate the Revised Trauma Score (RTS) for trauma triage and survival prediction. Combines GCS, systolic BP, and respiratory rate. Maximum score 7.84; RTS <4 predicts high mortality.

Canadian Head CT

Apply the Canadian CT Head Rule to determine if CT is needed after minor head injury (GCS 13–15). Achieves 98.4% sensitivity for neurosurgically significant injuries, safely reducing CT use.

NEXUS C-Spine

Apply the NEXUS criteria to determine if cervical spine imaging is needed after trauma. All 5 criteria absent gives 99.8% NPV for significant C-spine injury, safely avoiding CT or X-ray.

Frequently Asked Questions

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