EEG Patient Safety and Ethics 2 — Questions and Answers
Question 1: What is the primary safety concern when performing EEG on a patient in the ICU with external ventricular drains?
- Risk of photic-induced seizures
- Risk of infection or displacement of the drain during electrode application (Correct answer)
- Interference from the drain's electrical signal
- Need for sedation during the recording
Correct answer: Risk of infection or displacement of the drain during electrode application
Electrode application near external ventricular drains (EVDs) poses risks of infection (introducing pathogens near the surgical site) and mechanical displacement of the drain. Careful coordination with nursing and neurosurgery is essential.
External ventricular drains (EVDs) require sterile precautions because they provide a direct pathway into the ventricular system. EEG electrode application near EVD sites risks introducing infection and physically displacing the drain. Safety protocols include: coordinating with neurosurgery before electrode placement, maintaining sterile technique near the EVD insertion site, avoiding placing electrodes directly over or adjacent to the EVD, using alternative electrode positions when necessary, and documenting communication with the care team. Collodion should not be used near EVDs due to acetone vapors. Disposable electrodes with pre-applied gel may be preferred for ICU recordings.
Question 2: During an EEG recording, a patient begins to have a generalized tonic-clonic seizure. What is the technologist's first priority?
- Continue recording and immediately stop all activation procedures (Correct answer)
- Turn off the EEG machine to protect the equipment
- Restrain the patient to prevent movement artifact
- Remove all electrodes before calling for help
Correct answer: Continue recording and immediately stop all activation procedures
The technologist's first priority is to ensure patient safety while continuing the recording. This means stopping any activation procedures (hyperventilation, photic stimulation) and ensuring the patient is safe from injury, while keeping the EEG recording to capture the seizure.
When a seizure occurs during EEG, the technologist must: (1) keep the recording running — capturing the seizure is the purpose of the test and provides critical diagnostic data; (2) immediately stop all activation procedures; (3) ensure patient safety — lower the bed, remove hazardous objects, turn patient to side if possible, note the time; (4) call for medical assistance; (5) document the clinical seizure semiology (what body parts are involved, progression, duration); (6) observe and record post-ictal behavior and EEG patterns. The recording should never be stopped during a seizure, as the electrographic pattern (onset, evolution, termination, post-ictal changes) is the most valuable diagnostic information the EEG can provide.
Question 3: What infection control measure is required when applying reusable EEG electrodes between patients?
- Rinsing electrodes with tap water is sufficient
- Electrodes must be disinfected or sterilized according to facility protocol between each patient (Correct answer)
- Electrodes only need cleaning if visible contamination is present
- Alcohol wipe of the electrode surface is the only requirement
Correct answer: Electrodes must be disinfected or sterilized according to facility protocol between each patient
Reusable EEG electrodes must undergo proper disinfection or sterilization between patients to prevent transmission of infections, following facility-specific protocols and manufacturer guidelines.
EEG electrodes contact the scalp and may be exposed to blood (from skin abrasion during preparation) and other bodily fluids, classifying them as semi-critical devices requiring high-level disinfection. Standard protocols include: (1) immediate cleaning to remove gel and debris; (2) soaking in enzymatic cleaner; (3) high-level disinfection with appropriate solution (glutaraldehyde, ortho-phthalaldehyde, or per manufacturer specifications); (4) thorough rinsing; (5) proper drying and storage. Many facilities have transitioned to single-use disposable electrodes to eliminate cross-contamination risk entirely. Documentation of disinfection should be maintained. Subdermal needle electrodes are always single-use. Creutzfeldt-Jakob disease (CJD) prions require special handling — dedicated or disposable electrodes are mandatory.
Question 4: A patient's family member requests a copy of the EEG report. Under what condition can the technologist release this information?
- The technologist can release it immediately upon request
- Only after obtaining proper written authorization consistent with HIPAA regulations (Correct answer)
- Only if the family member is a healthcare provider
- Reports can never be shared with family members
Correct answer: Only after obtaining proper written authorization consistent with HIPAA regulations
Protected health information including EEG reports can only be released with proper authorization from the patient (or legal representative) in compliance with HIPAA privacy regulations.
Under HIPAA (Health Insurance Portability and Accountability Act), EEG reports are protected health information (PHI) that cannot be disclosed without proper authorization. The technologist should direct the family member to the medical records department or follow facility-specific release of information procedures. Valid authorization must include: the patient's written consent (or that of a legal representative if the patient is a minor or incapacitated), specification of what information to release, to whom, for what purpose, and an expiration date. Exceptions exist for treatment purposes (sharing with the treating physician team) and certain legal requirements. The technologist should never independently release medical information, even to close family members, without proper authorization documentation.
Question 5: What precaution should be taken when performing EEG on a patient with a suspected skull fracture or recent craniotomy?
- No special precautions are needed — standard application applies
- Avoid placing electrodes over or applying pressure to the affected area, and consult with the clinical team (Correct answer)
- EEG is absolutely contraindicated in these patients
- Only use subdermal needle electrodes at the affected site
Correct answer: Avoid placing electrodes over or applying pressure to the affected area, and consult with the clinical team
Electrode application over skull fractures or recent craniotomy sites requires avoiding direct pressure on the area, using alternative electrode positions, and coordinating with the clinical team to prevent complications.
Patients with skull fractures or recent craniotomies require modified electrode application. Direct pressure over these areas could cause pain, worsen fractures, or damage healing surgical sites. The technologist should: (1) review imaging and consult with the clinical team to identify affected areas; (2) avoid placing electrodes directly over fracture lines or craniotomy sites; (3) document modified electrode positions; (4) note that recordings from adjacent electrodes may show breach rhythm — higher amplitude, sharper morphology due to the skull defect reducing signal attenuation. Breach rhythm is a normal consequence of skull defects, not a pathological finding. If electrodes near the site are critical, disposable adhesive electrodes with minimal pressure may be used with clinical team approval.
Question 6: Informed consent for EEG should include information about which potential discomfort or risk?
- Risk of permanent brain damage from the recording
- Skin irritation from electrode adhesive and small possibility of seizure provocation during activation procedures (Correct answer)
- Risk of electric shock from the EEG machine
- Radiation exposure during the recording
Correct answer: Skin irritation from electrode adhesive and small possibility of seizure provocation during activation procedures
Informed consent should cover possible skin irritation from electrode paste or adhesive (collodion), mild discomfort from skin preparation, and the small risk that activation procedures could provoke a seizure in susceptible individuals.
EEG is a non-invasive, safe procedure, but informed consent should cover realistic risks and discomforts: (1) skin irritation or allergic reaction from electrode paste, collodion adhesive, or acetone (for removal); (2) mild scalp abrasion during skin preparation; (3) temporary discomfort from electrode application; (4) small risk of seizure provocation during activation procedures (hyperventilation, photic stimulation, sleep deprivation) — particularly relevant for patients with known epilepsy; (5) possible headache from hyperventilation. There is no radiation, no significant electrical risk (EEG records but does not stimulate), and no risk of brain damage. Patients with photosensitive epilepsy should be specifically informed about the photic stimulation risk. The consent process should be documented in the medical record.
EEG Patient Safety and Ethics 2
What is the primary safety concern when performing EEG on a patient in the ICU with external ventricular drains?