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Related Concept Videos

Epilepsy ll: Types01:22

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.
Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Seizures: Classification01:13

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Seizures l: Introduction01:20

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
Seizures ll: Types01:19

Seizures ll: Types

Seizures are sudden bursts of abnormal electrical discharge in the brain that interfere with normal function. They are commonly divided into three groups: focal seizures, generalized seizures, and other types that do not fit neatly into either category.Focal SeizuresFocal seizures begin in a single brain region. When awareness is preserved, they are called focal aware seizures and may cause sensations such as tingling, unusual smells, or flashing lights. When awareness is impaired, they are...
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein01:20

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...

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How accurate is ICD coding for epilepsy?

Nathalie Jetté1, Aylin Y Reid, Hude Quan

  • 1Division of Neurology, Department of Clinical Neurosciences, University of Calgary, Alberta, Canada. njette@ucalgary.ca

Epilepsia
|August 18, 2009
PubMed
Summary
This summary is machine-generated.

Epilepsy coding in administrative databases (ICD-9-CM and ICD-10) demonstrates high accuracy for emergency visits and hospital discharges. This validates the reliability of these records for epilepsy research and patient care.

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Area of Science:

  • Medical Informatics
  • Neurology
  • Health Services Research

Background:

  • Accurate coding of epilepsy in administrative databases is crucial for research, quality improvement, and public health surveillance.
  • The transition from ICD-9-CM to ICD-10 coding systems necessitates validation of coding accuracy.
  • Emergency visit (ER) and hospital discharge abstract databases (DAD) are key sources for capturing epilepsy diagnoses.

Purpose of the Study:

  • To assess the validity of International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) and International Classification of Diseases, Tenth Revision (ICD-10) epilepsy coding.
  • To evaluate coding accuracy specifically within emergency visit (ER) data and hospital discharge abstract databases (DAD).
  • To determine the reliability of administrative data for epilepsy diagnosis using established metrics like sensitivity, specificity, and predictive values.

Main Methods:

  • Two distinct patient record sources were utilized for validation.
  • Method 1 involved reviewing 127 seizure monitoring unit (SMU) patient records coded with ICD-10, calculating sensitivity (Sn), specificity (Sp), positive predictive value (PPV), and negative predictive value (NPV).
  • Method 2 involved reviewing 486 ICD-9-CM and 454 ICD-10 coded records from ER visits or hospital admissions, calculating PPV and NPV. Two physicians independently confirmed epilepsy diagnoses for all reviewed charts.

Main Results:

  • For ICD-10 coding in the SMU, Sn was 99%, Sp 70%, PPV 85%, and NPV 97%.
  • For ER and DAD data, PPV and NPV for ICD-9-CM ranged from 97% to 99%, and for ICD-10 ranged from 90% to 100%.
  • Specific epilepsy subtypes, including grand mal status and partial epilepsy with complex partial seizures, showed PPVs greater than 75% for both coding systems.

Conclusions:

  • Administrative data from emergency visits and hospital discharges demonstrate high overall validity for epilepsy coding within the studied health region.
  • Both ICD-9-CM and ICD-10 coding systems provide reliable data for epilepsy, supporting their use in health surveillance and research.
  • The findings support the continued use of these administrative databases for epilepsy-related studies and healthcare management.