Mindray Passport V Service Manual

Main Unit Theory of Operation
1 - 10 0070-10-0705 Passport V™ Service Manual
1.3.6 Parameter modules
Multi-Parameter board
The multi-parameter board incorporates multiple parameters, such as ECG, RESP, DPM
SPO
2
, 2-channel IBP, TEMP, etc. Details include the following:
•The multi-parameter board employs a high-speed DSP, making digital filtering, arrhythmia
analysis, and ST analysis faster and more effective.
• The DSP is in charge of 3- and 5-lead ECG monitoring, arrhythmia and ST analysis, RESP
monitoring, and communicating with the CPU board.
•The multi-parameter board also employs an MCU, which supports 1-channel temperature
measurement, DPM SpO
2
, and 2-channel IBP measurement. The MCU transfers all the
measurement data to the DSP.
•Respiration rate is monitored using the impedance method and can only be measured
with two ECG leads.
•The multi-parameter board integrates the DPM SpO
2
circuit. If a monitor is configured
with an OEM SpO
2
module, then DPM SpO
2
functions are overridden.
CO
2
Module
•There are two types of CO
2
modules: DPM CO
2
and Microstream CO
2
.
•The DPM CO
2
module measures the CO
2
concentration using the NDIR technology. It
performs a zero calibration periodically to ensure accurate measurements for a long
period of time. An appropriate compensation can be applied according to the patient
environment, thus preventing measurements from being influenced by interfering gases.
•The Microstream CO
2
module ensures that measurements will not be affected by other
gases and the accuracy can be maintained without any gas compensation. Additionally,
the module has a very low sample flow rate, reducing its effect on the patient and the
environment to a minimum.
OEM SpO
2
Module
There are two types of OEM SpO
2
modules: Masimo-2013 SpO
2
module and Nellcor SpO
2
module.
An isolation power board is attached to each of them and used to isolate the DC power and
the UART signal of the OEM SpO
2
modules from other circuits in the main unit. The UART
signal comes from the CPU board and passes through the power management and interface
board.

Mindray Passport V Specifications

General

Brand	Mindray
Model	Passport V
Category	Health Care Products
Language	English