Data storage

These tables outline the typical data storage needs for CPAP and bilevel devices.

Data type	CPAP devices	Bilevel devices
Patient details	1 KB to 15 KB depending on the number of detailed sessions
Summary therapy data	1 KB per day	1 KB per day
Detailed data	50 KB per day	75 KB per day
High rate data	1.2 MB per day	1.5MB per day

The values in this table are based on eight hours of periodic data per day.

Example calculation

A clinic monitors 5,000 patients over 12-months with follow-ups every three months. Of the 5,000 patients, 4,000 use CPAP devices and the remainder use bilevel devices.

Table 1. Data required at each follow up

Device	Summary therapy	Detailed data	High-rate data	Total per visit
CPAP	1 KB x 91 days	50 KB x 91 days	1.2 MB x 91 days	114 MB
Bilevel	1 KB x 91 days	75 KB x 91days	1.5 MB x 91 days	144 MB

Table 2. Total storage required (with high-rate data)

	Number of patients	Number of visits	Data size	Storage per year
CPAP patients	4,000	4	114 MB	1824 GB
Bilevel patients	1,000	4	144 MB	576 GB
Total per year				2400 GB

Table 3. Total storage required (with no high-rate data)

	Number of patients	Number of visits	Data size	Storage per year
CPAP patients	4.000	4	4.6 MB	73.6 GB
Bilevel patients	1,000	4	6.9 MB	27.62 GB
Total per year				101.2 GB

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ResScan Essentials Clinical Guide

Data storage

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