Bistos BT-780, Operation Manual, Page: 33 / 51

BT-780 Operation manual
32
P/N : 780-ENG-OPM-EXP-R00 Bistos Co., Ltd. 2020.03
10.7 Alarm setup
In “SpO
2
Setup” menu, select “Alarm Setup >>” to enter “Alarm Setup” interface, and set SpO
2
alarm switch, alarm level, upper and
lower alarm limit. See 6.5 Alarm Setup for detailed setting method.
10.8 Technical description

Accessories have passed the biocompatibility test and meet the requirements of ISO 10993-1.
 Fluke's index 2XL Oxygen Analyzer can be used to check the function of the monitor and can be used to assess the accuracy of
the pulse rate but cannot be used to assess the accuracy of blood oxygen.
 Functional testers cannot be used to evaluate the accuracy of pulse oximetry probe and pulse oximetry.

Measure the maximum temperature between the oxygen probe and the tissue contact surface
：
Measured as described in
Annex BB of ISO 80601-2-61,the temperature is less than 41 ° C.
11 NIBP
11.1 Overview
The monitor uses oscillometric method to measure noninvasive blood pressure (NIBP).
The oscillometric method for measuring blood pressure is to inflate a cuff with a certain amount of pressure until the arterial blood
flow has been completely blocked. As applied pressure decreases, the arterial blood flow which was completely occluded gradually
opened, and completely opened. Then, the pulsation of the arterial vascular wall will generate a shock wave in the cuff. SBP, MAP,
and DBP are obtained by measuring and analyzing cuff pressure oscillations when deflating.

Produce first most clear signal - reflect SBP

Oscillation amplitude reaches the peak - reflect MAP

When the cuff pressure is suddenly lowered - reflect DBP
Measuring mode: manual, cycle, and continuous. Each mode shows systolic, mean and diastolic blood pressure.
 Manual mode
Using Manual mode start to measures by hand
 Automatic mode measures
Use manual mode to open automatic mode, then the measure will automatically turn to automatic mode after a certain time.
During measurement, any error will stop the current automatic measurement, but not affect next automatic measurement
unless the time interval less than 30s. If the time interval less than 30s, should delay the next automatic measurement, keep
the interval more than 30s.
The time interval can be chosen In Automatic mode as 1, 2, 3, 4, 5, 10, 15, 30, 60, 90, 120, 180, 240, 480 minutes.

Continuous mode
Choose continuous mode, 5 seconds after complete a measurement start the next measurement, continue 5 minutes then
stop. During measurement, any error will stop the continuous measurement. If the first measurement time is over 4 minutes
and 40 seconds but less than 5 minutes, the continuous mode will stop before 5 minutes, if the first measurement time is
over 5 minutes, the continuous mode will stop after 5 minutes.
The monitor is defibrillation proof, so the monitor operates normally after defibrillation.
11.2 Safety information
WARNING

Do not carry out non-invasive blood pressure measurement on patients with sickle cell disease and skin damage
or any expected damage. Do not measure NIBP on traumatic body part. This may cause further injury.

When pediatric patients are measured, in order to ensure the cuff pressure does not exceed its maximum
measurement range of patient types (Adult mode: 300mmHg and Pediatric mode: 240mmHg, Neonate mode:
150mmHg), you must ensure that you have selected the correct patient type (see patient information menu
settings). Using the wrong type of pattern is likely to endanger the patient to patient safety, as higher blood
pressure levels for adults does not apply to pediatric and neonate.

For patients with severe coagulation disorder, determine if the automatic blood pressure measurement is
carried out according to the clinical evaluation, since the friction of body and cuff may produce hematoma.

Do not install a cuff on the limbs with intravenous infusion or duct, because it may lead to tissue damage around
the duct when the cuff is inflated and makes the infusion slow down or be blocked.

The inflatable tube connecting the blood pressure cuff and the monitor should be smooth without
entanglement. The pressure generated by being kinked connection tubing may cause blood flow interference.

For patients with severe thrombotic disorders, determine whether to carry out automatic blood pressure
measurement according to the clinical situations, since the limb bundled with a cuff may produce hematoma.

Measure blood pressure frequently will affect the distribution of blood flow, May endanger the safety of
patients.

Check the patient's physiological condition before measure blood pressure, in order to ensure that long time
measure will not damage the circulation of patients

For mastectomy patients, applying the NIBP cuff on the surgery side arm can cause lymphedema. Measure blood
pressure on opposite side arm.

Pressurization of the cuff can temporarily cause loss of function of simultaneously used monitoring device on the