Hoffrichter TREND II User manual

User´s Manual
CPAP - AUTO - BILEVEL - BILEVEL ST20
Quality makes the Difference
HOFFRICHTER
TREND II

2 Info
SERIAL NUMBER
HOFFRICHTER GmbH delivers all its systems with a
serial number in order to ensure traceability. The serial
number is indicated on the type label on the bottom
of the system.
Please always specify the serial number in inquiries
and complaints.
CONFORMITY
The device complies with the requirements of the Direc-
tive 93/42/EEC.

Table of Contents 3
TABLE OF CONTENTS
Legend of Symbols ................................................ 5
Safety Instructions ................................................. 6
Power Supply ...................................................... 10
Standby Mode ..................................................... 11
Intended Use ....................................................... 12
Contraindications................................................. 13
Technical Description ........................................... 14
General Remarks .............................................. 14
TREND II CPAP ................................................ 16
TREND II AUTO ............................................... 17
TREND II BILEVEL ........................................... 19
TREND II BILEVEL ST20 .................................. 20
Notes Prior to First Use........................................ 22
Views................................................................... 24
Front View ........................................................ 24
Back View......................................................... 25
Scope of Delivery................................................. 26
Optional Accessories ........................................... 27
Use of the Device................................................. 28
Use of Oxygen ..................................................... 30
Filter Change ....................................................... 32

4 Table of Contents
Cleaning .............................................................. 33
Cleaning the Mask ............................................ 33
Cleaning of the Therapy Tube............................ 33
Cleaning the Device .......................................... 34
Cleaning the Head Gear.................................... 34
Alarm Functions of the Device .............................. 35
Power Failure .................................................... 35
Mask Alarm....................................................... 36
Pressure Alarm ................................................. 36
Wake Alarm ...................................................... 37
Functions of the Device........................................ 38
Info-Menu ......................................................... 39
Patient-Menu .................................................... 44
Clinic-Menu ...................................................... 56
Troubleshooting ................................................... 69
Display Messages ................................................ 72
Service ................................................................ 75
Preparing the Device for a Different Patient........ 76
Disposal............................................................... 77
Device .............................................................. 77
Packaging......................................................... 77
Technical Data ..................................................... 78

Legend of Symbols 5
LEGEND OF SYMBOLS
Observe the accompanying documenta-
tion
Applied part type BF
Electric safety class II (with protective
insulation)
CE Declaration of Conformity
Manufacturer
Observe the User´s Manual
Do not dispose of the device with normal
domestic waste. For information on the
proper disposal of the device, please con-
tact your responsible customer service.

6 Safety Instructions
SAFETY INSTRUCTIONS
Before using your respiratory therapy device for the
first time, please thoroughly read these User´s Manual.
Keep these User´s Manual at a safe place for immedi-
ate consultation, if necessary.
For the period stipulated by law, HOFFRICHTER GmbH
warrants that the product is free from any defects pro-
vided it is used as intended.
HOFFRICHTER GmbH is not liable for any damage and
consequential damage nor for any effects on the safety,
reliability and performance of the device, if:
•
manipulations, modifications, expansions, adjust-
ments, repairs and maintenance measures are
carried out by persons not authorized by us to do so
• use is made of accessories and spare parts which
come from other manufacturers and have not been
released by us for use with the point
•
the device is used in a way that is different from
that described in the User´s Manual
• the hygiene and cleaning instructions contained in
these User´s Manual fail to be observed

Safety Instructions 7
In order to prevent potential hazards, please fol-
low the instructions below:
•
Exclusively use the device for your own therapy,
which must have been prescribed by a physician.
•
Use accessories only which have been recom-
mended and offered by your specialized dealer.
•
Regularly test the alarm function of your device
(from page 35).
•
Always ensure that the small hole in the mask or
in the adapter between the mask and the tube is
unobstructed so that the exhaled air that is loaded
with CO2can escape.
•
Never set up the device in a compartment of a
cabinet nor under your bed.
•
Please make sure air can circulate around the
device and the power plug is readily accessible.
• Do not place the device in the vicinity of radiators.
•
Ensure that the device is positioned horizontally.
This is particularly necessary if a humidifier is con-
nected.
•
If you receive oxygen with your therapy, please
follow all fire protection and safety regulations with
regard to the use of oxygen.

8 Safety Instructions
• Mobile use of the device is permitted only in a
parked vehicle.
• Immediately see your physician if, while using the
device, you develop one or more of the following
symptoms: dryness of the mucous membranes
in nose and throat, frontal sinus complaints, ear-
ache, a running nose, hypersensitivity of the skin,
oversensitiveness, loss of voice, disturbances of
orientation or memory.
•
Immediately notify your specialized dealer if the
device fails to function properly.
•
Never place the respiration therapy device in the
vicinity of other equipment or devices, such as
defibrillators, diathermy equipment, mobile phones,
microwave, remote-controlled toys, etc. Electro-
magnetic fields greater than 3 V/m may affect the
operation of the device.
•
When connecting the device to a DC supply source,
please only use the optional connection cable listed
under optional accessories and do not use the
device with a PC.

Safety Instructions 9
To maintain electrical safety, please observe the
following instructions:
•Do not put the device into operation if its housing
and/or cables are damaged.
•
Do not open the housing. Notify your specialized
dealer of any disturbances and failures.
• Protect the device from water and moisture.
•
Never operate the device in moist rooms nor in a
bathroom.
• Do not place a vessel filled with fluid on the device.
•Be absolutely sure not to seize the device if it has
fallen into water.
•
Do not set up the device in the vicinity of water
vessels (bath tubs).
•
Before cleaning the device, always disconnect the
power plug.

10 Power supply
POWER SUPPLY
TREND II has an internal switched mode power supply
unit with a wide range input of 100 - 240 V~, 50 - 60 Hz.
This allows connection to all energy supply networks
in the world.
It is also possible to operate the de vice with a direct
voltage of 24 V DC, e.g. for mobile use in a truck or
mobile home. When connecting the device to a DC
supply source, please only use the optional connec-
tion cable and do not use the device with a PC.

Standby Mode 11
STANDBY MODE
The device is in the standby mode as long as the tur-
bine is turned off. The standby mode is indicated by
the illuminated display showing date and time. Power
consumption in this mode is approx. 5 W.
In the standby mode, the device TREND II may remain
continuously switched on without posing any risk.

12 Intended Use
INTENDED USE
The TREND II is intended for treating breathing disfunc-
tion especially for nighttime sleep apnea in patients
with a weight of 30 kg and higher.
The device generates a continuous positive airway
pressure in order to keep the upper respiratory tract
unobstructed.
The device is not suitable for being used with patients
who need artificial respiration. This therapy device is
no life-preserving system.
The treatment pressure is applied through a breathing
mask. This breathing mask must be provided with an
exhalation valve in order to ensure that the exhaled air
is discharged. Do not wear the breathing mask while
the therapy device is turned off because, otherwise, you
might rebreathe exhaled air. Please also follow the man-
ufacturer’s instructions on use of the breathing mask.

Contraindications 13
CONTRAINDICATIONS
Respiratory therapy may be contraindicated in patients
with the following preexisting diseases:
• Bullous lung diseases
•Pneumothorax
• Very low blood pressure
•
Air accumulation after open craniocerebral trauma
or other head injuries
In case of an inflammation of the paranasal sinuses or
the middle ear, it might be indicated to stop the ther-
apy. Please consult your physician.
Devices which have been fitted with an AquaTREND uni
humidifier may not be used with additives such as medi-
cation or aroma oils in the humidifier water.

14 Technical Description
TECHNICAL DESCRIPTION
GENERAL REMARKS
For all devices of the TREND II series the following
characteristics apply.
To generate the necessary pressure, the device is pro-
vided with an electronically controlled blower. In order to
keep the stress for the patient as low as possible, the
blower has been designed with a high reserve capac-
ity and a quick control response.
The pressure is measured directly in the mask and
constantly controlled by the device. Consequently, the
breathing work for the patient is as easy as possible.
There are two separate tubings in the device. One is for
respiratory air and one is for the convection air required
for cooling the electronics.
In addition to the mask alarm, the device offers an-other
safety function, the power failure alarm. It automatically
restarts the motor after power restoration.
The device contains a built-in microcontroller which
controls all of its functions.
A quartz alarm clock further adds to the comfort when
using the device. Further comfort functions include
a soft start ramp, the automatic start-stop function
Air inlet
Air outletConnector
measuring
tube
Blower
Pressure
sensor
Control
unit
Filter

Technical Description 15
and the adjustable display brightness. While passing
through the device, the air is heated a little, so that it
has a higher water absorbency. When indoor air is dry
in winter, the mucous membranes in mouth and nose
may become particularly dry. This is unpleasant and
may even cause infections in exceptional cases. For
that reason, a therapy might require air humidification.
AquaTREND uni a clip-on humidifier is available as
accessory for all TREND II devices.
If necessary, just click the humidifier onto the device.
Remove it by pressing its release button.
The heater levels are set in the heater menu. The
selected heater level is displayed as in the display of
the device while the humidifier heating is switched on.
For more information please see your AquaTREND uni -
User`s manual or contact your specialized dealer.
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16 Technical Description
TREND II CPAP
The CPAP device is a therapy device for treating obstruc-
tive sleep apnea. For this purpose the device provides
a continuous positive air pressure. Apart from the con-
ventional CPAP-mode the device offers a proportional
increase in pressure in the FLEXLINE mode to the indi-
vidual breath flow during inspiration and a pressure
drop during the expiration. This intelligent method of
pressure adjustment makes a careful therapy possible.

Technical Description 17
TREND II AUTO
Within a certain pressure range the device automati-
cally controls the therapy pressure depending on the
occurrence of respiratory events. In sleep phases with no
events the therapy pressure is lowered. Starting obstruc-
tive events are treated effectively with a slight pressure
increase.
For a high therapy comfort the therapy pressure should
always be only as high as necessary and as low as pos-
sible.
The device can recognize the following respiratory events:
• Obstuctive apnea
• Hypopnea
• Central apnea
• Snoring
• Normal respiration
• Increased airway resistance
The identification of the different respiratory events is
achieved via 3 channels:
1. Measurement of any constriction of the respiratory
tract
2. Detection of flow limitations by measuring the flow
3. Detection of snoring with the help of sound detec-
tion

18 Technical Description
The combined analysis of all results facilitates a very
precise differentiation between obstructive and cen-
tral events.
The device adjusts the therapy pressure according to
the detected events as described below:
•Increase of pressure for obstructive events
•
Decrease of pressure for central events and normal
respiration
In addition, the pressure increase can be adjusted
in 5 levels according to special requirements and to
the individual patient comfort. These settings are per-
formed by the physician with the help of the PC soft-
ware TRENDset.
In addition to normal APAP and CPAP mode the device
offers the FLEXLINE mode, a pressure increase which
is proportionate to the individual respiration flow during
inspiration and a pressure decrease during expiration.

Technical Description 19
TREND II BILEVEL
The device has two different adjustable pressure lev-
els. A higher level for inspiration and a lower level for
expiration.
Trigger device
The respiration trigger detects the patients efforts to
breath in and out and signals these efforts to the con-
trol device. A flow-based trigger is integrated which can
be set separately for inspiration and expiration. While
the pressure increases during inspiration it decreases
during expiration. In connection with an optimum slope
adjustment this results in a ventilation which is very
comfortable for the patient and which gives the patient
the impression as if the device is following the natural
respiration without delay.
NOTE:
During the expiration phase a negative pressure
(vacuum) will not be created.

20 Technical Description
TREND II BILEVEL ST20
The device has two different adjustable pressure lev-
els. A higher level for inspiration and a lower level for
expiration.
Trigger device
The respiration trigger detects the patients efforts to
breath in and out and signals these efforts to the con-
trol device. A flow-based trigger is integrated which can
be set separately for inspiration and expiration. While
the pressure increases during inspiration it decreases
during expiration. In connection with an optimum slope
adjustment this results in a ventilation which is very
comfortable for the patient and which gives the patient
the impression as if the device is following the natural
respiration without delay.
In the device are the modes S-, ST- and T-mode inte-
grated.
S-mode
Spontaneous trigger – the change from one pressure
level to another is triggered by starting respiration of the
patient only. A decline in pressure to the set lower pres-
sure level also occurs once the inspiration flow ends.