1,329 calculators and references across 60 specialties, with formula confidence shown up front.
Abdominal Trauma Injury Score Explanation and Clinical Context Abdominal Trauma Injury Score is a structured framework designed to quantify the severity of abdominal organ damage following traumatic injury. Each abdominal organ receives a numerical grade based on anatomical disruption, bleeding severity, and physiological effect. This approach aligns with widely accepted organ injury scales from major trauma associat
Canadian C Spine Rule explanation and clinical context The Canadian C Spine Rule is a validated clinical decision rule intended for use in alert and stable adult trauma patients to determine the need for cervical spine imaging. The rule first checks for any high risk criteria including age greater than or equal to 65 years or dangerous mechanism of injury or presence of extremity paresthesia. If any high risk criteri
Major Criteria Fat Embolism Diagnostic Criteria Explanation and Clinical Context Fat embolism syndrome is a clinical condition that arises when fat globules enter the systemic circulation and trigger respiratory neurological and systemic inflammatory manifestations. The Gurd criteria which classify findings into major and minor categories remain widely used for bedside evaluation. Major criteria include petechiae res
Glasgow Coma Scale Assessment Explanation and Clinical Context Glasgow Coma Scale is a standardized scale for assessing level of consciousness in acute brain injury and other conditions affecting consciousness. It comprises three components eye response verbal response and motor response with item scores summed to yield a total score from 3 to 15. Eye response ranges from 1 to 4 with higher value indicating better sp
Gustilo Open Fracture Classification Explanation and Clinical Context The Gustilo open fracture classification system categorizes open fractures by wound size soft tissue injury contamination and associated vascular injury. Type I indicates a clean wound less than or equal to 1 centimeter with minimal soft tissue damage. Type II indicates a wound greater than 1 centimeter and less than or equal to 10 centimeters with
Injury Severity Score ISS Explanation and Clinical Context The Injury Severity Score ISS is a standardized anatomical trauma severity scale widely used to quantify overall injury burden in patients with multiple trauma. It is derived from the Abbreviated Injury Scale AIS across six body regions which include head or neck face chest abdomen or pelvic contents extremities or pelvic girdle and external structures. Only
Hematoma percent Laceration depth centimeter Liver Injury Grading Score Explanation and Clinical Context Liver injury grading score is part of the organ injury scale developed to standardize the assessment of hepatic trauma severity in clinical practice. The score is based on hematoma size and laceration depth which reflect the extent of anatomical disruption of hepatic tissue. Grade one typically represents minor co
Interpretation guidance The Mangled Extremity Severity Score is the sum of four component scores skeletal and soft tissue injury limb ischemia shock and patient age. A multiply of the limb ischemia component is applied when warm ischemia time exceeds six hours leading to a higher effective ischemia contribution in the total. Historically total scores of seven or greater have been associated with a high likelihood of
Interpretation and clinical use The NEXUS C Spine Clearance Rule identifies five clinical criteria. If none of the five criteria are present in a patient who is clinically reliable, the likelihood of clinically important cervical spine injury is low and radiographic imaging may be avoided. If any criterion is present imaging is recommended. Clinical reliability includes normal mental status and absence of significant
Glasgow Coma Scale GCS Systolic Blood Pressure SBP Select SBP more than 89 SBP 76 to 89 SBP 50 to 75 SBP 1 to 49 SBP 0 Respiratory Rate RR Select RR 10 to 29 RR more than 29 RR 6 to 9 RR 1 to 5 RR 0 Revised Trauma Score Explanation and Clinical Context Revised Trauma Score is a physiological scoring system created to evaluate trauma severity and predict outcomes in injured patients. It uses three fundamental clinical
Spleen Injury Grading Scale Explanation and Clinical Context The Spleen Injury Grading Scale provides a structured method for classifying splenic trauma using imaging based anatomical criteria. This system helps clinicians understand the severity of parenchymal disruption hematoma size vessel involvement and the extent of devascularization. Grade I reflects minor injury with limited subcapsular hematoma or shallow la
Head and Neck Percentage Anterior Trunk Percentage Posterior Trunk Percentage Right Arm Percentage Left Arm Percentage Right Leg Percentage Left Leg Percentage Perineum Percentage Explanation and Clinical Context Total Body Surface Area or TBSA estimation is a foundational step in the initial management of burn patients. Accurate assessment helps determine fluid resuscitation needs, predicts systemic impact, and guid
TRISS Trauma Injury Severity Score Explanation and Clinical Context TRISS is a validated method for estimating the probability of survival in trauma patients by integrating three established components of trauma assessment which are the Revised Trauma Score the Injury Severity Score and patient age. The model also incorporates the mechanism of trauma which is categorized as blunt or penetrating because outcomes diffe