Multiple Sleep Latency Test Interpretation Report (MSLT)

Report Title: Multiple Sleep Latency Test (MSLT) Interpretation Report

Patient Name: [Patient full name]

DOB: [Date of birth]

MRN: [Medical record number]

Sex: [Male / Female / Intersex / Nonbinary / Not documented]

Height/Weight or BMI: [Height, weight, or BMI] (If not provided, state "Not documented")

Preceding-Night PSG Date: [Date / Not available]

MSLT Date: [Date]

Facility/Lab Name: [Facility or lab name]

Ordering Clinician: [Name, credentials]

Interpreting Clinician: [Name, credentials]

Sleep Technologist: [Name, credentials]

Clinical Indication

[Clinical indication and referral question] (State the primary indication: evaluation of excessive daytime sleepiness, suspected narcolepsy or idiopathic hypersomnia, or other central hypersomnolence. Include documented symptom history: presence or absence of cataplexy, sleep paralysis, hypnagogic/hypnopompic hallucinations, sleep attacks, disrupted nighttime sleep. Include Epworth Sleepiness Scale score if available. Mention drowsy driving or safety-sensitive occupation if documented. If indication not provided, state: "Indication not provided; interpretation limited to physiologic findings.")

Pre-Test Conditions & Validity

[This MSLT is interpretable under standard conditions. / This MSLT is of limited interpretability due to: [specific reasons]] (Select one. If limited, list reasons such as insufficient sleep documentation, medication effects, untreated sleep apnea, circadian misalignment, or protocol deviations.)

• Sleep schedule documentation (prior 1–2 weeks): [Sleep diary / Actigraphy / Both / Not documented]; Adequate sleep schedule: [Yes / No / Not documented]
• Medications within 24 hours: [List or "None" or "Not documented"]; REM-modulating or alerting/sedating medication changes within 2 weeks: [Yes with details / No changes / Not documented]
• Substances on test day: Caffeine [Yes with amount and time / No / Not documented]; Nicotine [Yes / No / Not documented]; Alcohol [Yes / No / Not documented]; Other [Specify / None / Not documented]
• Urine drug screen: [Negative / Positive with substances / Not performed / Not documented]
• Comorbid sleep disorder treatment: [PAP in use with settings / Oral appliance / None / Not documented] (Specify whether used during PSG and MSLT if applicable.)

Preceding-Night PSG Summary

PSG type: [Diagnostic / Split-night / Titration / Not documented]. Time in bed: [hh:mm]. Total sleep time: [hh:mm]. Sleep efficiency: [%]. Sleep latency: [minutes]. REM latency: [minutes]. AHI or RDI: [Value and criteria]. PSG SOREMP: [Yes / No / Unknown] (REM within 15 minutes of sleep onset). [Note any significant fragmentation or findings affecting MSLT interpretation; otherwise state "No significant factors noted."] (If preceding PSG unavailable, state: "Preceding-night PSG not available; standard MSLT prerequisites not confirmed; interpretability limited.")

MSLT Protocol Summary

Nap trials attempted/completed: [Number]/5. First nap start: [Hours/minutes after PSG termination]. Inter-nap intervals: [Standard per AASM / Deviations with details]. Protocol deviations: [No protocol deviations observed. / Describe deviations] (If only 4 naps completed, document reason.)

Nap Results

(If no sleep occurred, record sleep latency as 20 minutes and note "No sleep" in comments. Use "—" for REM latency when no REM occurred. If a nap was not performed, include row with explanation.)

Nap Number	Start Time	Sleep Latency (min)	REM Latency (min)	SOREMP	Comments
1	[Time]	[Minutes]	[Minutes / —]	[Yes / No]	[Comment]
2	[Time]	[Minutes]	[Minutes / —]	[Yes / No]	[Comment]
3	[Time]	[Minutes]	[Minutes / —]	[Yes / No]	[Comment]
4	[Time]	[Minutes]	[Minutes / —]	[Yes / No]	[Comment / Not performed—reason]
5	[Time]	[Minutes]	[Minutes / —]	[Yes / No]	[Comment / Not performed—reason]

Summary Metrics

• Mean Sleep Latency: [Minutes] (from [number] naps) (If fewer than 4 naps completed, label as "limited/partial.")
• Total SOREMP Count on MSLT: [0–5]
• PSG SOREMP: [Yes / No / Unknown]
• Combined SOREMP Count (MSLT + PSG): [Total / Not applicable]

Interpretation

[Overall impression] (State whether findings demonstrate pathologic sleep propensity and whether SOREMP count supports or does not support a narcolepsy spectrum disorder in the appropriate clinical context.)

[Threshold assessment] (State whether mean sleep latency meets diagnostic thresholds for pathological sleepiness [≤8 minutes] and whether SOREMP count meets thresholds for narcolepsy spectrum disorders [≥2 SOREMPs including PSG SOREMP if present]. Emphasize that diagnosis requires clinical correlation and exclusion of confounders.)

[Differential considerations] (Address relevant confounders: insufficient sleep, circadian misalignment, untreated sleep apnea, medication effects, or withdrawal effects. Include limitations only if validity concerns exist, using bold prefix: LIMITATION: [Specific limitation].)

Recommendations

• [Safety counseling] (Include if clinically significant sleepiness present: drowsy driving precautions, workplace safety for heights/machinery, occupational medicine review if commercial driver or safety-sensitive role.)
• [Follow-up plan] (Recommend follow-up with treating clinician to integrate results with clinical history for diagnosis confirmation and treatment planning.)
• [Address confounders if applicable] (If results negative but clinical suspicion remains, specify confounders to address before repeat testing: optimize sleep duration, stabilize circadian schedule, treat sleep apnea, manage medication effects.)
• [Therapeutic considerations if appropriate] (High-level mention only: behavioral strategies, scheduled naps, wake-promoting agents, anticataplectic therapies; specific treatment decisions deferred to treating clinician.)
• [Additional studies if indicated] (MWT, actigraphy, repeat PSG/MSLT under optimized conditions, specialty referral.)

Signature

Interpreting Clinician: [Name, credentials, board certification]

Signature: [Electronic signature]

Date/Time: [Date and time of report]