RPSGT Exam Preparation

This is not just another study guide—this is a complete RPSGT exam system.
Fully updated with improved explanations, real exam-focused content, and new high-quality images aligned with AASM 3.0.
Includes scoring rules, calculations, flashcards, and everything you need to pass with confidence.
👉 https://a.co/d/06HLDMV1

To determine EEG electrode placement for a polysomno-graphic recording according to AASM criteria, it is necessary to measure the patient’s head and mark the F3/F4, C3/C4, and O1/O2 positions in accordance with the “10–20 system”.

🧠 🎯 10–20 SYSTEM – EXAM TIPS (AASM 3.0)

🧩 1. Start with the correct landmarks

📏 2. Golden rule: 10% – 20% – 20% – 20% – 20% – 10%
Must always equal 100%
Ends = 10%
Middle segments = 20%
💡 Exam tip:
Quickly check if proportions match this pattern

🧠 3. Electrode order (anterior → posterior)
👉 Fp → F → C → P → O
⚠️ EXAM TRAP: They may mix the order

🔢 4. Odd vs Even numbers (VERY COMMON)
Odd numbers (1,3,5,7) → Left side
Even numbers (2,4,6,8) → Right side
Z = midline

💡 Examples:

C3 = left
O2 = right
Cz = midline

📐 5. Cz location (classic question)
Cz is located at:
50% Nasion–Inion
50% between preauricular points

⚠️ TRAP: If it's described as anterior or posterior → ❌ wrong
🔍 6. Bilateral symmetry
F3 ↔ F4
C3 ↔ C4
O1 ↔ O2

💡 If not symmetrical → incorrect placement

⚡ 7. Common AASM montages (EXAM GOLD)

Know these by heart:

F4-M1
C4-M1
O2-M1

⚠️ TRAP: They may switch M1/M2 or sides

🧪 8. M1 / M2 references
M1 = Left mastoid
M2 = Right mastoid

💡 Example:

C4-M1 → right hemisphere referenced to left mastoid
🚨 9. Common exam traps
Incorrect 10–20 spacing
Misplaced Cz
Left/right reversed
Lack of symmetry
Wrong montage reference
🎯 10. PRO EXAM STRATEGY

When you see an image:

Find Cz first
Check symmetry
Confirm left vs right (odd/even)
Verify spacing (10–20 rule)

👉 This helps eliminate wrong answers FAST

🧠 MEMORY LINE

“10–20 symmetry, Cz in the center, odds left, evens right.”

🚨 Be honest… is SCORING the reason you’re not passing?

Drop a “ME” in the comments if scoring confuses you 👇

Most techs don’t fail because they didn’t study…
They fail because they panic when applying AASM 3.0 rules on the exam.

🔥 That’s exactly what this book fixes.

📘 Mastering Polysomnography Scoring (AASM 3.0 Focused)
👉 https://a.co/d/0i6gkE2y

✔️ Board-style questions that feel like the real exam
✔️ Simple breakdown of scoring rules (no confusion)
✔️ High-yield traps you MUST recognize
✔️ Designed to train your brain for exam thinking

💡 Stop second-guessing every epoch.
Start scoring with confidence.

🎯 If you’re retaking the exam or feel stuck… this is your edge.

Mastering Polysomnography Scoring: AASM 3.0–Focused Review, Tips, and Board-Style Practice for the RPSGT Exam What this book offers: Who this book is for:

📊 HIGH-YIELD SLEEP STUDY FORMULAS & SCORING REVIEW

(Aligned with AASM Scoring Manual v3.0, 2023)
Prepared by Maria I Sosa, RPSGT

🧠 CORE FORMULAS (BOARD-STYLE)
✅ Apnea-Hypopnea Index (AHI)

AHI = (Apneas + Hypopneas) ÷ Total Sleep Time (hours)

👉 Used to determine OSA severity:

Normal:

🧠 PRACTICE QUESTIONS WITH ANSWERS & EXPLANATIONS

1.A patient with Chiari malformation presents with sleep-disordered breathing. Which mechanism best explains the condition?

✅ Correct Answer: B. Impaired ventilatory control at the brainstem

🧠 Explanation:

Chiari malformation affects the brainstem, where respiratory control centers are located, leading to central sleep apnea (CSA) due to impaired neural drive
⚠️ Exam Trap:
Upper airway collapse → obstructive, not central
Loop gain related to cardiac disease → Cheyne-Stokes, not Chiari
📘 AASM 3.0 Key Point:

CSA results from impaired central respiratory drive, not airway obstruction

2.Which of the following best describes the mechanism of opioid-induced central sleep apnea?

✅ Correct Answer: B. Suppression of respiratory drive via μ-receptors in the medulla

🧠 Explanation:

Opioids act on μ-receptors in the medulla, suppressing the respiratory centers and reducing ventilatory drive → central apneas.

⚠️ Exam Trap:
REM predominance → incorrect
Obstruction → not the mechanism
📘 AASM 3.0 Key Point:

Opioid-induced CSA = central suppression of ventilatory drive

3.Which opioid is most commonly associated with central sleep apnea?

✅ Correct Answer: C. Methadone

🧠 Explanation:

Methadone is a long-acting opioid strongly linked to CSA due to prolonged respiratory depression.

⚠️ Exam Trap:

Short-acting opioids are less commonly associated

📘 AASM 3.0 Key Point:

Long-acting opioids = higher risk of CSA

4.Which of the following best characterizes high loop gain in sleep-disordered breathing?

✅ Correct Answer: C. Ventilatory instability with oscillations in breathing

🧠 Explanation:

High loop gain = oversensitive ventilatory control system, causing:

Hyperventilation → ↓ CO₂
Apnea → ↑ CO₂
→ cyclic instability (CSA pattern)
⚠️ Exam Trap:

Low loop gain = stable system (opposite concept)

📘 AASM 3.0 Key Point:

CSA is associated with high loop gain (unstable ventilatory control)

5.Which polysomnographic finding is characteristic of Cheyne-Stokes breathing?

✅ Correct Answer: C. Crescendo–decrescendo airflow with central events

🧠 Explanation:

Cheyne-Stokes breathing is defined by:

Cyclic crescendo-decrescendo pattern
Central apneas and hypopneas
⚠️ Exam Trap:

No requirement for severe desaturation or specific sleep stage

📘 AASM 3.0 Key Point:

CSR = periodic breathing pattern with central events

If you don’t understand THIS, you will miss questions on the RPSGT exam