Patient Preparation, Screening, and Study Orientation

1. Medical-history review and screening

The technologist reviews the medical history — current and past conditions — including comorbidities (coexisting conditions such as heart failure, COPD, or diabetes that affect sleep and breathing), current medications (which may alter sleep architecture, arousal, muscle tone, or respiration — for example sedatives, stimulants, opioids, antidepressants, or REM-suppressing drugs), and surgical history (especially upper-airway or head-and-neck procedures). A sleep questionnaire captures sleep complaints and habits in a standardized way. This review is risk-screening context, not diagnosis.

2. Standardized questionnaires and anthropometric measures

• Epworth Sleepiness Scale (ESS) — an 8-item self-report of daytime sleepiness; higher totals indicate greater subjective sleepiness.
• STOP-BANG — a yes/no obstructive-sleep-apnea (OSA) screen (Snoring, Tiredness, Observed apnea, blood Pressure, BMI, Age, Neck circumference, Gender); remember the "B.A.N.G." items: BMI, Age, Neck, Gender.
• Berlin Questionnaire — an OSA-risk screen across categories of snoring, daytime sleepiness/fatigue, and hypertension/body size.
• Morningness-Eveningness Questionnaire (MEQ) — estimates chronotype (morning- versus evening-type preference).

Anthropometric measures are physical body measurements relevant to breathing. Neck circumference (larger neck suggests airway crowding), BMI (body mass index; elevated BMI is a common OSA risk factor), and the Mallampati score (visual classification of visible throat structures, gauging airway crowding). These are recorded screening observations, not diagnoses.

3. Patient orientation, informed participation, and accommodations

Patient orientation explains what will happen, why, and what to expect; the goal is informed participation — understanding and agreement, with formal consent per facility policy. A clear procedure explanation builds trust. The technologist must address anxiety and claustrophobia (fear of confined spaces), protect privacy and dignity, and provide communication accommodations for pediatric, geriatric, and bariatric needs, mobility limitations, and cognitive impairment support, securing interpreter and accessibility services when needed.

How it works

1. Review the order and gather medical history, comorbidities, current medications, and surgical history.
2. Administer questionnaires (ESS, STOP-BANG, Berlin, MEQ) and record anthropometric measures (neck circumference, BMI, Mallampati).
3. Orient with a plain-language procedure explanation and obtain informed participation/consent.
4. Arrange interpreter, accessibility, mobility, and cognitive accommodations; address anxiety and claustrophobia.
5. Protect privacy and dignity, and document all findings and accommodations completely.

Common confusions

Memory aids

"REMO": Review history and meds, Explain and obtain informed participation, Measure and screen (neck, BMI, Mallampati, ESS, STOP-BANG, Berlin, MEQ), Orient and accommodate. For STOP-BANG, recall "B.A.N.G." — BMI, Age, Neck, Gender.

Quick review

Topic Recap

• Preparation combines history review, screening, measurement, and orientation.
• ESS (sleepiness), STOP-BANG/Berlin (OSA risk), MEQ (chronotype) standardize screening.
• Neck circumference, BMI, and Mallampati add breathing-related context.
• Orientation, informed participation, and plain-language explanation are ethical necessities.
• Anxiety, claustrophobia, privacy, dignity, and accommodations must be addressed proactively.
• The technologist screens and documents; the physician diagnoses and interprets.

Knowledge Check

1. Name the four main components of patient preparation.
2. What does the ESS measure, and how does it differ from STOP-BANG?
3. Which anthropometric measures are commonly recorded, and what does each relate to?
4. Why is informed participation more than getting a signature?
5. Give two accommodations for a patient with limited mobility or a language barrier.

Answers and Rationales

1. Medical-history review, screening questionnaires, anthropometric measures, and orientation. Why: Together they establish safety, validity, and comfort.
2. The ESS measures daytime sleepiness; STOP-BANG screens OSA risk. Why: One targets sleepiness, the other breathing-related risk.
3. Neck circumference (airway/OSA risk), BMI (body size/OSA risk), and Mallampati (airway crowding). Why: Each adds breathing-related risk context.
4. Because it means the patient understands the procedure and genuinely agrees, which is the ethical foundation of the study. Why: Consent without understanding is not consent.
5. Any two of: safe positioning assistance, an interpreter, translated written materials, or a chaperone/extra time. Why: These remove barriers and protect dignity.