Related Experiment Video
Updated: May 13, 2026

Measuring Diaphragm Thickness and Function Using Point-of-Care Ultrasound
Published on: November 3, 2023
CareFusion 3100B high-frequency oscillatory ventilator diaphragms require pre-use inspection
Abstract:
A rubber diaphragm in the driver assembly of the CareFusion 3100B high-frequency oscillatory ventilator may fail before its scheduled replacement at 4,000 hours of use, rendering the unit incapable of ventilation. CareFusion is in the process of revising the suggested replacemen schedule and adding user guidance to the device's operator's manual to address the problem. Users should thoroughly inspect the diaphragm each time they connect a breathing circuit and should remove from service any 3100B whose diaphragm shows signs of degradation.
Related Concept Videos
Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
Respiratory System Abnormal Finding II: Palpation and Auscultation
Palpation Findings
During a respiratory assessment, palpation can reveal several vital abnormalities:
Mechanical Ventilation I: Indication and Settings
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Tracheostomy Suctioning I: Pre-Procedural Steps
Equipment Required
First, gather all necessary equipment: a sterile suction catheter, a sterile disposable container, sterile gloves, a towel or...
Respiratory System Abnormal Finding I: Inspection and Percussion
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...

