30 Days in Home Use and Home Use Patterns Over 6 Months

Study Design Objectives of the Clinical Investigation

- Assess polysomnographically measured sleep latency and sleep efficiency following 30
days in home use of the device and compare these measures with those following initial
in lab use in the CIP-003 protocol.

- Determine the long-term use patterns of the Cerêve Sleep System in the environment of
intended use.

Study Design Overview A multi-center, prospective, non-randomized, two phase study to
determine durability of effects following 30 days of in home use (phase I) and home use
patterns over an additional 5 months in home use of the Cerêve Sleep System (phase II).

A total of 30 evaluable subjects will be targeted to complete phase I and a total of 24
evaluable subjects will be targeted to complete phase II. It is anticipated that 36
subjects will be enrolled into the CIP-004 protocol to obtain the numbers of evaluable
subjects described.

During in home use in both the durability phase and the home use patterns phase, the subject
will be asked to use the device for a minimum of three nights each week for at least 4 hours
on each of these nights up to seven nights each week. Subjects will complete a weekly home
use log throughout both phases of the study.

Inclusion Criteria:

- Must have completed the in-lab protocol CIP-003 and have signed an informed consent
to participate in this follow-on study.

- Sleep latency and sleep efficiency data are available from the 2 in-lab PSG nights
from CIP-003 in the 14-16° condition, as confirmed by the core laboratory.

Exclusion Criteria:

- Use of medications known to affect sleep or wake function (e.g., hypnotics,
benzodiazepines, antidepressants, anxiolytics, antipsychotics, antihistamines,
decongestants, beta blockers, corticosteroids) are excluded for the durability phase,
through the in-lab studies, in this protocol; Beta blockers which do NOT cross the
blood brain barrier are acceptable.

- Consumption of more than one alcoholic drinks per day, or more than 7 drinks per week
prior to study entry and during the durability phase, through the in-lab studies, in
this protocol.

- Caffeinated beverages > 4/day or the equivalent of more than 4 cups of coffee during
the durability phase, through the in-lab studies, in this protocol.

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