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Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
Flail Chest-II01:26

Flail Chest-II

Managing flail chest, a condition characterized by a segment of the chest wall moving independently from the rest of the thoracic cage, requires a comprehensive approach. It includes a thorough assessment of the patient's condition, a diagnostic evaluation to determine the extent of the injury, and the implementation of appropriate medical interventions tailored to the individual's needs.
Assessment:
1. Clinical Evaluation:
History:
Blood Pressure Imbalances and Circulatory Shock01:24

Blood Pressure Imbalances and Circulatory Shock

Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...
Spinal Cord Injury ll: Pathophysiology01:14

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...
Cellular Injury II: Classification01:21

Cellular Injury II: Classification

Cellular injury is any process that disrupts a cell’s ability to maintain homeostasis, leading to structural or functional changes. It is broadly classified based on etiology (cause) and mechanism of damage.Classification by EtiologyCellular injury may result from several causes. Hypoxic injury happens due to reduced oxygen delivery, most commonly from inadequate blood supply, such as arterial obstruction; for example, coronary artery thrombosis can cause myocardial infarction. Chemical injury...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...

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Pseudofracture: An Acute Peripheral Tissue Trauma Model
10:08

Pseudofracture: An Acute Peripheral Tissue Trauma Model

Published on: April 18, 2011

Trauma Center Level and Mortality in Injured Patients with Shock or Multisystem Trauma.

Christopher J McLaughlin1,2, Jamie Song1, Joseph A Kern1

  • 1Division of Traumatology, Surgical Critical Care, and Emergency Surgery, Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.

Journal of the American College of Surgeons
|June 19, 2026
PubMed
Summary

Level I and Level II trauma centers show similar overall survival rates for injured patients. However, Level I centers offer a survival benefit for those in shock or with blunt multisystem trauma.

Keywords:
injury mortalityinjury outcometrauma centertrauma system

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Area of Science:

  • Trauma Surgery
  • Public Health
  • Health Services Research

Background:

  • Trauma center verification standards are similar for Level I and Level II facilities.
  • Differences in patient volume, subspecialty care, and transfer patterns may impact outcomes for high-risk trauma patients.

Purpose of the Study:

  • To compare in-hospital mortality between Level I and Level II trauma centers in Pennsylvania.
  • To identify specific patient subgroups that may benefit from care at a particular trauma center level.

Main Methods:

  • Retrospective cohort study using the Pennsylvania Trauma Outcomes Study database (1999-2023).
  • Included patients aged ≥16 years with Injury Severity Score (ISS) >9, transfer to a trauma center, or death at a trauma center.
  • Multivariable logistic regression was used to adjust for patient and injury characteristics.

Main Results:

  • Over 363,000 patients were analyzed; Level I centers treated 68.2% and Level II centers treated 31.8%.
  • Overall adjusted in-hospital mortality was similar between Level I and Level II centers.
  • Level I centers showed lower adjusted mortality for patients presenting in shock or with blunt multisystem trauma.

Conclusions:

  • While overall mortality is comparable, Level I trauma centers provide a survival advantage for specific high-risk patient groups.
  • Findings support targeted triage and early transfer strategies for critically injured patients with blunt trauma and shock.