Livongo HT900 User manual

Blood Pressure Monitor
User Guide
START
STOP
ST

3USER GUIDE
Contents
The Livongo Program .................................................. 5
Getting Started....................................................... 6
Components of the Device ............................................... 7
Installing the Batteries ................................................. 8
Securing the Cuff ..................................................... 9
Taking a Measurement ................................................ 11
Caution ........................................................... 13
Systolic and Diastolic Blood Pressure ...................................... 14
Standard Blood Pressure Classication ..................................... 15
Irregular Heartbeat Detector ............................................ 16
Precautions ........................................................ 17

USER GUIDE 4
Troubleshooting ..................................................... 20
Error Codes ........................................................ 22
Maintenance ....................................................... 24
Symbols .......................................................... 25
Technical Specications ............................................... 26
Intended Use ....................................................... 28
Compliance Statement ................................................ 28
EMC Guidance ...................................................... 29
Complied Standards List ............................................... 33
Manufacturing Information ............................................. 35
Contact Information .................................................. 35

5USER GUIDE
The Livongo Program
Welcome to Livongo! This new approach to managing high blood pressure
makes it easy to improve your lifestyle choices. It comes with the Livongo
connected blood pressure monitor and arm cuff, as well as anytime
access to expert coaches, personalized insights, reports, and much more.
If you have any questions, please call Livongo Member Support at
[phone] or email us at [email protected].
We’re available 24 hours a day, 7 days a week.

USER GUIDE 6
Getting Started
Open the Livongo mobile app and log in. If you don’t have the
app yet, download it from the iOS App Store or Google Play
Store. The app will be your home base for the Livongo program.
Once you log in to the app, tap GET STARTED on the Livongo
program card on the home screen. Follow the steps for setting
up your blood pressure monitor or review the instructions on
the next pages.

7USER GUIDE
Components of the Device
STAR
T
STOP
Arm Cuff
Cuff Tube
Start/Stop
Button
Display
Cuff Tube
Connector
Battery
Compartment
Battery
Cover
Systolic
Pressure
Diastolic
Pressure
Pulse
Rate
Irregular
Heartbeat
Indicator
Component list of pressure
measuring system:
• Cuff
• Air pipe
• PCBA
• Pump
• Valve

USER GUIDE 8
If this is your rst time using the device:
1. Slide open the battery door on the back of the device.
2. Install the batteries provided with the device.
3. Follow the diagram inside the battery compartment for
correct polarity — the springs should align with the
negative sign (-) on the batteries.
4. Slide the battery door closed.
Caution:
· Do not insert the battery with the polarities (+/-) in the wrong direction.
· Use only 4 Duracell AA alkaline batteries with this device.
· Do not use other types of batteries. Do not use new and used batteries together.
· Remove the batteries if the device will not be used for three months or more.
· Do not dispose of batteries in re.
· If battery uid should get on your skin or clothing, immediately rinse with plenty of clean water.
Installing the Batteries

9USER GUIDE
Securing the Cuff
1. Plug the connector on cuff tube into
the device.
2. Expose your left upper arm by removing
or adjusting clothing and jewelry.
Make sure blood ow is not
constricted by a rolled-up sleeve.
3. Open the cuff and loosen fully.
4. Orient the cuff so that the tube exits
toward your hand.
5. Place your arm through the cuff loop,
with your palm facing up.
START
STOP

USER GUIDE 10
6. Position the cuff’s edge about an inch
(2-3 cm) above the elbow.
7. Align the Фmarker (located to the right of
tube exit) with the center of your arm.
Ф
8. Tighten the cuff evenly around your arm by
pulling on the end — make sure the Фmarker
stays aligned with the center of your arm.
9. Wrap the end of the cuff over your arm to secure
it in place. Don’t make it too tight — allow a
nger to t between the cuff and your arm.
1 inch (2–3 cm)

11 USER GUIDE
Taking a Measurement
1. Rest for at least 5 minutes, and avoid exercise and
caffeine for at least 30 minutes before you take a reading.
Lay your arm on a table with your palm facing up. The cuff
should be at the same height as your heart. Sit up straight
and rest your feet at on the ground. Make sure the tube is
not kinked or pinched.
2. Press the START/STOP button on the device to turn it on.
3. Wait for the device to power on, and perform the
measurement while inating the cuff. Try not to speak
or move during this time.
4. When the measurement concludes, results are shown on
the display, and the cuff automatically deates.
5. Remove the cuff after it deates.

USER GUIDE 12
6. The device automatically transmits measurement
results. During this process an indicator is shown
in the middle of the display.
7. When the measurement is successfully
transmitted, the device shows the above right
indication before powering off.
Transmission
in progress
Transmission
successful
Notes:
· If you wish to abort the measurement while the
cuff is inating, press and hold the START/
STOP button for 5 seconds.
· If the device detects an irregular heartbeat, the
display will show this indicator along with
the measurement results. While this may not
be a reason for immediate concern, contact
your primary care provider if you see this
symbol frequently.
· The rst-time setup in a new location
could take 1 to 5 minutes to locate
cellular tower connectivity.
· This device measures blood pressure using
the oscillometric method. Before each
measurement, the device establishes a zero
point based on the atmospheric pressure. The
cuff is then inated, and the device measures
the oscillations in pressure created by the
user’s heartbeat.

13 USER GUIDE
Caution
· Do not use this device on infants.
· This device is not suitable for use on pregnant women or women who might be pregnant.
· This device is not suitable for use on patients with implanted electrical devices, such as cardiac
pacemakers or debrillators.
· This device is not suitable for use on patients with preeclampsia, premature ventricular beats,
atrial brillation, peripheral arterial disease, or those undergoing intravascular therapy or who
have an arteriovenous (AV) shunt.

USER GUIDE 14
Systolic and Diastolic Blood Pressure
When ventricles (the part of the heart that pumps blood) contract and pump blood out
of the heart, the blood pressure reaches its maximum value in the cycle, which is called
systolic pressure. When the ventricles relax, the blood pressure reaches its minimum value
in the cycle, which is called diastolic pressure.
Systolic Diastolic
Blood discharging artery Blood entering vein
Press Relax

15 USER GUIDE
Standard Blood Pressure Classication
The chart below is the standard blood pressure classication published by the American Heart
Association (AHA). If you have been diagnosed with high blood pressure (hypertension), the AHA
recommends keeping your blood pressure below 130/80 mmHg.
Blood Pressure Category Systolic mmHg (upper#) Diastolic mmHg (lower#)
Normal Less than 120 and Less than 80
Elevated 120–129 and Less than 80
High Blood Pressure
(Hypertension) Stage 1
130–139 or 80–89
High Blood Pressure
(Hypertension) Stage 2
140 or higher or 90 or higher
Hypertensive Crisis (Consult your doctor immediately) Higher than 180 and/or Higher than 120
Caution: Please consult a physician if your blood pressure measurement falls outside
the suggested range of 130/80 mmHg.

USER GUIDE 16
Irregular Heartbeat Detector
An irregular heartbeat is detected when a heartbeat rhythm varies while the unit is measuring
the systolic and diastolic blood pressure. During each measurement, the monitor records all
the pulse intervals and calculates the average: If there are two or more pulse intervals, the
difference between each interval and the average is more than the average value of ±25%, or
there are four or more pulse intervals, the difference between each interval and the average is
more than the average value of ±15%, the irregular heartbeat symbol appears on the display
when the measurement results appear.
Caution: The appearance of the IHB icon indicates that a pulse irregularity consistent
with an irregular heartbeat was detected during measurement. Usually this is NOT
a cause for concern. However, if the symbol appears often, we recommend you seek
medical advice. Please note that the device does not replace a cardiac examination,
but serves to detect pulse irregularities at an early stage.

17 USER GUIDE
Precautions
· Only use Duracell alkaline AA batteries with this device as these offer the longest battery life.
Other brands may not be able to provide sufcient power for cellular data transmission.
· Only use a cuff that has been approved by the manufacturer for this device model.
· This device is for adults. Do not use it on children unless otherwise instructed by a
medical professional.
· Keep the device, cuff, and batteries away from children as their components they may pose a risk of
choking or strangulation if used improperly.
· Do not apply the cuff on an arm that has: an unhealed wound, another medical device attached, or an
intravenous drip or a blood transfusion attached.
· Do not use this device if you have pre-eclampsia, premature ventricular beats, atrial brillation,
peripheral arterial disease, if you are undergoing intravascular therapy, if have an arteriovenous (AV)
shunt, or if you have undergone a mastectomy.
· Do not use this device with high-frequency (HF) surgical equipment.
· Do not use this device if you are allergic to polyester, nylon, or plastic.
· This device is intended for indoor, home use. This device is not intended for public use.
· If in doubt, contact your medical professional before use.

USER GUIDE 18
· The device may require up to 30 minutes to warm up/cool down from the minimum/maximum
storage temperature before it is ready for use.
· Do not use the device where ammable gases are present, or in environments with high
oxygen concentration.
· Measurements may not be accurate if the device is used in close proximity to devices generating strong
electromagnetic elds, such as microwave ovens, wireless charging stations, X-ray machines, etc.
· Wireless communication devices, such as Wi-Fi access points, mobile phones, and cordless phones may
cause interference that may affect the accuracy of measurements. A minimum distance of 1 ft (30 cm)
should be kept from such devices during measurement.
· The device is not intended for use on extremities other than the arm, or for any purpose other than
measuring blood pressure and pulse rate.
· Do not confuse self-monitoring with self-diagnosis.
· This device allows you to monitor blood pressure.
· Do not begin or alter medical treatment without consulting a medical professional.
· Do not take frequent, consecutive measurements as these may constrict blood ow and lead to injury.
· This unit is not suitable for continuous monitoring during medical emergencies or operations.
· This device is not anesthesia proofed (AP/APG), and it is not suitable for use in the presence of
ammable anesthetics.

19 USER GUIDE
· Do not touch the batteries during measurement.
· This device is portable, but should not be operated in transit.
· You can use this device to take your own measurement, no third-party operator is required.
· In rare occasions, the device may remain inated after a measurement. If this were to occur, make sure
to disconnect the tube from the device to release pressure. Prolonged pressurization of the cuff may
lead to ecchymosis or other injury.
· Do not kink, fold, stretch, compress, or otherwise deform the tube during measurement as it may lead
to an inaccurate result, or excessive ination of the cuff which may cause injury.
· Accuracy of pressure measurement (at 50 and 200 mmHg) and the rate of air leakage from the system
should be checked after repair, maintenance, and every two years of use.
· The device must only be serviced and repaired by authorized service personnel.
· At the request of authorized service personnel, circuit diagrams, component part lists, descriptions,
and calibration procedures will be made available by the manufacturer or distributor.
· Do not use the device while under maintenance, or being serviced.
· Dispose of the device, its accessories, and batteries according to your local waste disposal
regulations and guidelines.

USER GUIDE 20
Troubleshooting
Problem Possible Reason Resolution
Device doesn’t power on
when START/STOP button
is pressed.
or
Cuff does not inate.
(display remains off)
Batteries completely drained. Replace all batteries with new ones.
Batteries inserted incorrectly. Remove batteries and reinstall them,
making sure the + and - polarity symbols
on the batteries match those inside the
battery compartment.
Cuff does not inate.
(display turns on)
Cuff not plugged in correctly. Make sure the connector on cuff tube is
plugged all the way into the device.
Cuff doesn’t form a loop
around arm.
Cuff not assembled. To form a loop: Pass the end of the cuff
farthest away from the tubing through
the long metal D-ring. The smooth side
(without the hook and loop fasteners)
should be on the inside of the cuff loop.

21 USER GUIDE
Problem Possible Reason Resolution
Readings too high or low.
or
Readings vary signicantly
between measurements.
Cuff not positioned correctly. Review instructions on Securing the Cuff,
and retry measurement.
Movement during measurement. Place your arm on a table with your palm
facing up. The cuff should be at the same
level as your heart. Make sure you stay still
and don’t talk during measurement.
Measurement results differ
from those measured at
doctor’s ofce.
Measurements taken in a medical/
professional environment (white coat
effect) may affect your blood pressure.
Measurements taken in a more relaxed,
home environment may avoid effects
experienced in clinical settings. Continue
taking readings as usual. If in doubt,
contact a medical professional.
Error code shown after
measurement.
Measurement accuracy may be affected or
transmission may have been unsuccessful.
Consult the Error Codes table on
pages 22–23 for more information
and further instructions.