Blood Pressure Monitor

Blood Pressure Monitor

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iDoctorcloud VS Other Big Brand

BrandJapan–*** (HBP-9020)iDoctorcloud (RBP-9000)
Pictureomron blood pressure monitorIDoctorcloud pulse wave blood pressure monitor  
TypeCommon Electronic BP MonitorPulseWave BP Monitor
BrandJapan–*** (HBP-9020)iDoctorcloud (RBP-9000)
Working PrincipleOscillometric, Statistic InductionPulseWave Invention,Real-time State of Blood Flow
WaveFormWaveform of Omron Blood pressure monitorWaveform of iDoctorcloud Blood pressure monitor
BPJudgment principleCompute SBP/DBP from the envelope of the oscillometric waveformImitate the auscultatory method:
*upper airbag function as Pump bulb
*lower airbag
function as Stethoscope to detect PulseWave
Application limitationEach individual manufacturer utilizes their proprietary algorithm for SBP/DBP.
Theory is
far from reality for those who with irregular heartbeats
No limitation
Airbag1 Airbag2 Airbags
*1 for Pressure Signal Detection
*another 1 for PulseWave Signal
Detection
Tube1 Tube2 Tubes
*1 for Pressure Signal Detection
*another 1 for PulseWave Signal
Detection
Sensor1 Sensor2 Sensors
*1 for Pressure Signal Detection
*another 1 for PulseWave
Signal Detection
AccuracyBlood pressure:±3mmHg
Pulse:±5%
Blood pressure:±2mmHg (±0.267KPa)
Pulse:±2%
Data storageNo100 sets
CommunicationRS-232CRS-232 / USB
Using Intruction boardNoYes

Evaluation report from hosipitals/Clinics

Click here to see the hospital evaluation report of the blood pressure monitor

Specifications Of iDoctorcloud Blood Pressure Monitor

NameAutomatic Pulsewave Blood Pressure Monitor
Model No.RBP-7000
Measurement Range0 ~270mmHg (0 ~36kPa)
Pulse rate40 ~180/min
Accuracy of BP± 2mmHg (±0.267kPa)
Accuracy of Pulse Rate± 2%
Storage Capacity100 sets
Power SupplyAC 100-240V,50-60Hz,1.6-0.8A
Operating Temperature41℉ ~ 104 ℉/ (5℃ ~ 40℃)
Relative Humidity15% ~ 80%
Air Pressure80kPa~106kPa
Storage Temperature-7.6℉ ~ 131℉/ (-20 ℃ ~ 55 ℃)
Relative Humidity≤93%
Air Pressure50kPa ~106kPa
Gross Weight7.45kg
Packing Dimension500mm(L)*355mm(W)*455mm(H)
19.68’’(L)*13.98’’(W)*17.91’’(H)
Shock ProtectionClass II, Type B
Arim Circumstance17~42cm
CommunicationUSB*1 , RS-232*2, RJ-45*1
Test PortsUpper Bladder Test Port *1, Lower Bladder Test Port*1
PrinterNo
Elbow ButtonYes, to adjust arm position
Horizontal 10° AdjustmentNo
Intelligent AwakeningYes

How Does Pulse Wave Blood Pressure Monitor Measure?

  • Pulsewave BP imitates mercury BP Monitor.
  • But it’s better than mercury BP Monitor.
  • Because it has 2 airbags with 2 tubes and 2 sensors.
  • Upper airbag functions as a pump, lower airbag functions as the Stethoscope to detect pulse wave.

The results come from physics and maths algorithm, not by human judgement via hearing and vision.

See below diagram to know how our Blood pressure monitor work differently.

How Does Pulse Wave Blood Pressure Monitor Measure?

How To Have Systolic Blood Pressure Value?

H1 : the 1st pulsewave amplitude
H2 : the 2nd pulsewave amplitude
Pss1 : the airbag pressure data of H1
Pss2 : the airbag pressure data of H2
Pss0 : the airbag pressure data when pulsewave amplitude is 0.

So, we can get below equation:
(Pss1-Pss0)/H1=(Pss2-Pss0)/H2
Therefore,Pss0 is the highest pressure (SBP)

How to have Systolic Blood Pressure Value

When start to measure with the pulsewave cuff, the upper airbag gets enough pressure to block the blood flow of the brachial artery, then it gradually released the pressure of upper airbag until the moment that the blood flow rushes into vessel (we call this moment as Pss0),at this moment, the pulse will generate an intensity wave,this wave compared with the airbag pressure wave,there will be a LINER DATA,we call Pss0 as the highest pressure,that is SYSTOLIC PRESSURE (SBP)

How to Have Diastolic Blood Pressure Value?

Psz1 & Psz2 & Psz3 & Psz4 : Separately stands for lower airbag pressure data (which also means the pulsewave pressure data) at each SBP points.
T1 & T2 & T3 & T4 : Separately stands for the TIME DELAY of pulsewave according to Psz1/2/3/4.
PszA & PszB : Separately stands for lower airbag pressure data when upper airbag pressure data is smaller than DBP data.
TA & TB : Separately stands for the matching time dalay
Psz0 stands for upper airbag pressure data at DBP point
T0 stands for the matching pulsewave time delay on this DBP point.

So, we get below equation:
(TA+TB)/2=T0
(Psz1-Psz0)/(T1-T0)= (Psz2-Psz0)/(T2-T0)= (Psz3-Psz0)/(T3-T0)= (Psz4-Psz0)/(T4-T0)
Therefore, Psz0 is the lowest pressure (DBP)

When blood rushes into the vessel, with the pressure released from the upper airbag, there is a time delay for blood flow from the heart to the brachial artery, and the moment when this time delay gradually approaches zero, it means the blood can flow freely without any external pressure, just flow by the heartbeats pressure, this moment stands for the lowest blood pressure (DBP), we call it Psz0.

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