Puritan Bennett 840 PB840 Ventilator Power Supply Board PN T4-076314-SP

The T4-076314-SP is a critical power supply component for the Puritan Bennett™ 840 (PB840) ventilator, designed for patient ventilation needs ranging from infant to adult. As the "840 power module," its core function is to convert incoming electrical power into the stable, regulated voltages required for the ventilator's operation. It is an integral part of the PB840 system's overall power delivery architecture, which also includes a backup power source (BPS) to ensure continuous operation during mains power interruptions.

The PB840 ventilator is a high-end, widely used device in critical care settings, known for its performance and versatility. However, like all complex medical electronics, its power supply is susceptible to failure. High usage, environmental factors, or power surges (such as those exceeding the normal 220V operating voltage) can cause damage to the power board, necessitating professional maintenance and component replacement. General maintenance and troubleshooting of PB840 ventilators involve understanding its four main components: the Graphic User Interface (GUI), Breath Delivery Unit (BDU), compressor, and the backup power system.

The Puritan Bennett 840 is a critical care ventilator designed for acute and subacute care of patients with respiratory failure or insufficiency in healthcare facilities. Originally manufactured in 1998, the PB840 is now distributed by Medtronic. It is a high-performance, comprehensive ventilator capable of meeting a wide range of patient needs, from neonates weighing as little as 300 grams to adults weighing up to 150 kg.

One of the standout features of the PB840 is its PAV+™ (Proportional Assist Ventilation Plus) software. This advanced breath type is designed to better manage a patient's work of breathing and supports more natural breathing compared to conventional mechanical ventilation. The ventilator includes a full suite of other optional software upgrades to meet specific clinical needs:

• NeoMode 2.0: For neonatal ventilation
• Volume Ventilation Plus: Includes Volume Control Plus and Volume Support
• Leak Compensation and Tube Compensation: For managing circuit leaks and compensating for artificial airways
• Bi-level Ventilation

The PB840 offers a variety of modes and breath types to tailor ventilation to the patient's condition:

• Core Modes: Assist/Control (A/C), Synchronized Intermittent Mandatory Ventilation (SIMV), and Spontaneous (SPONT) mode
• Mandatory Breath Types: Volume Control (VC), Pressure Control (PC), or Volume Control Plus (with the volume ventilation plus option)
• Spontaneous Breath Types: Pressure Supported (PS), Volume Supported (VS), and Proportional Assist (PA)