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Introduction
This Service Manual provides the information needed to successfully service
the Philips M3500B HeartStart XLT and the Laerdal M5500B Heartstart 4000
Defibrillator/Monitors. The intended users of this manual are technical per-
sonnel who have been trained in the safe and proper servicing of the M3500B/
M5500B.
Overview
In this chapter, you'll find general information that you should become famil-
iar with before servicing the M3500B/M5500B. Detailed information regard-
ing controls, operation, and capabilities of the instrument can be found in the
Instructions for Use that was shipped with the product. We recommend you
review the Instructions for Use before servicing this device. This Service
Manual assumes you are familiar with the controls and with basic operations.
Defibrillator/Monitor
The M3500B/M5500B is a biphasic, semi-automatic external defibrillator.
This portable, lightweight device offers two modes of operation for defibrilla-
tion:
Semi-Automatic External Defibrillation (AED) Mode
Manual Mode
In AED Mode, the M3500B/M5500B analyzes the patient's ECG and advises
the clinician whether or not to deliver a shock. In Manual Mode, the M3500B/
M5500B turns control of the defibrillation process over to the clinician. The
clinician analyzes the patient's ECG, decides if defibrillation is advised, and
determines the energy setting for defibrillation. Manual Mode also allows the
clinician to perform synchronized cardioversion and offers optional noninva-
sive pacing (using a monophasic waveform).
Defibrillation is performed through multifunction defib electrode pads. In
addition, both AED and Manual Mode offer monitoring through pads, 3-lead
ECG monitoring electrodes, or optional 5-lead ECG monitoring electrodes.
Optional pulse oximetry (SpO
well.
) monitoring is available in both modes, as
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