Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Transient Ischemic Attack l: Introduction

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...

Ischemic Stroke l: Introduction

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.

Ischemic Stroke ll: Pathophysiology

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...

Hemorrhagic Stroke l: Introduction

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...

Hemorrhagic Stroke ll: Pathophysiology

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...

Stroke: Introduction and Types

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

The role of health classifications in health information management.

Health information management : journal of the Health Information Management Association of Australia·2020

Same author

Making a Quality Start: A Coder Orientation Program.

Health information management : journal of the Health Information Management Association of Australia·2018

Same author

The Australian Coding Standards Advisory Committee.

Health information management : journal of the Health Information Management Association of Australia·2018

Same author

Validity of anaesthetic complication coding data as a clinical indicator.

Australian health review : a publication of the Australian Hospital Association·2012

Same author

Actual versus projected separation of stroke-episodes in public-hospitals.

AMIA ... Annual Symposium proceedings. AMIA Symposium·2008

Same author

Does a state level acute hospital admitted patient dataset encapsulate appropriate performance measures of a process of care?

AMIA ... Annual Symposium proceedings. AMIA Symposium·2004

Search research articles

Related Experiment Video

Updated: Jul 8, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Coding and DRG relationships in stroke and transient ischaemic attack (TIA).

Shyamala Nadathur¹, Andrea Groom

¹Southern Health, Clayton, Vic, Australia. Shyamala.Nadathur@med.monash.edu.au

Health Information Management : Journal of the Health Information Management Association of Australia

|January 25, 2008

Summary

Selecting stroke and transient ischaemic attack (TIA) patient cohorts from Australian health databases using ICD codes and DRGs proved challenging. Inconsistent coding interpretations and classifications complicate accurate cohort identification for healthcare research.

More Related Videos

Transient Middle Cerebral Artery Occlusion Model of Stroke

Transient Middle Cerebral Artery Occlusion Model of Stroke

Published on: August 11, 2023

Related Experiment Videos

Last Updated: Jul 8, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Transient Middle Cerebral Artery Occlusion Model of Stroke

Transient Middle Cerebral Artery Occlusion Model of Stroke

Published on: August 11, 2023

Area of Science:

Health Services Research
Clinical Epidemiology
Health Informatics

Background:

National and state health databases in Australia commonly use International Classification of Disease (ICD) codes and Diagnosis Related Groups (DRGs) for cohort selection.
Accurate patient cohort identification is crucial for examining healthcare processes and outcomes.

Purpose of the Study:

To evaluate the feasibility of selecting a specific cohort of stroke and transient ischaemic attack (TIA) episodes from state-level hospital admission datasets.
To identify and analyze the challenges encountered in accurately defining this cohort using existing coding systems.

Main Methods:

Analysis of diagnostic coding practices within Australian state-level hospital admission datasets.
Examination of the application and interpretation of International Classification of Disease (ICD) codes and Diagnosis Related Groups (DRGs) for stroke and TIA cases.

Main Results:

Significant difficulties were encountered in accurately selecting the target stroke and TIA cohort.
Varied interpretations of ICD codes and DRGs, along with inconsistent code-to-DRG mapping and classification systems, were identified as primary challenges.

Conclusions:

The current reliance on ICD codes and DRGs presents substantial limitations for precise cohort selection in stroke and TIA research.
Further investigation into the relationships between ICD coding and DRGs is necessary to improve data accuracy and facilitate reliable healthcare process analysis.