9 Technical specifications
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EN
LM
T
68
65
1c
0
2/
20
22
All physiological flow and volume values are displayed in
BTPS (patient flow, target volume, breath volume, minute
volume). All other flow and volume values are displayed in
STPD.
The right to make design modifications is reserved.
All parts of the device are free from latex.
Standard applied: EN ISO 80601-2-72: Particular
requirements for the basic safety and essential performance
of home ventilation devices for patients dependent on the
device.
Devices of type LM150TD use the following open-source
software: Linux Kernel 4.19.132, Buildroot 2020.02.3
The software of this device contains code which is subject to
the GPL. You can obtain the source code and the GPL on
request.
Speed of pressure drop (in leakage ventilation only)
Adult
Pediatric
Level 1: 100 hPa/s
Level 2: 80 hPa/s
Level 3: 50 hPa/s
Level 4: 20 hPa/s
Level 1: 135 hPa/s
Level 2: 100 hPa/s
Level 3: 80 hPa/s
Level 4: 50 hPa/s
Maximum permitted flow for oxygen supply
Permitted pressure
30 l/min
< 1000 hPa
HFT flow range
Adult
Pediatric
Increment
Tolerance
5 l/min to 60 l/min
5 l/min to 25 l/min
1 l/min
±(2 l/min +20 % of set value)
Fine filter
up to 1 µm
up to 0.3 µm
Filter class E10
≥ 99.5 %
≥ 85 %
Service life of fine filter
approx. 250 h
USB flash drive
USB-C 3.0
Materials
Housing
Fine filter
Coarse dust filter
Circuit
Fire-retardant technical thermoplastics and silicones, stainless
steel
Polypropylene
Polyurethane
Polyethylene
Wireless module
Frequency band
Wireless standard
2.412 GHz to 2.4835 GHz
ETSI EN 300 328
Filtering and smoothing techniques
The physiological alarms are triggered 3 breaths after the alarm
threshold is reached. Exception: The
Pulse high
,
Pulse low
,
SpO
2
high
, and
SpO
2
low
alarms are triggered 15 seconds
after the alarm threshold has been reached.
The displays for pressure, flow, and leaks have low-pass filters.
Algorithm for alarm 758
(Constant pressure level)
Triggered when airway pressure is > 2 hPa and remains
continuously within a band of ±1 hPa for at least 17 seconds
Breathing system filter
Dead space: 26 ml
Flow resistance: 2.0 cm H
2
O
at 60 l/min
Service interval
4 years
SPECIFICATION
DEVICE
TOLERANCES FOR MEASURING DEVICES USED
Pressure:
± 0.75 % of measured value or ± 0.1 hPa
Flow:
± 2 % of actual value
Volume
± 3 % of actual value
Temperature:
± 0.3 °C
Time
±0.05 Hz/±0.001 bpm