Spotlight on Cystic Fibrosis

Improving a patients life with BCV

Cystic Fibrosis (CF) is a common life-threatening inherited disease. Hayek Medical has put together an informative pack regarding this disease and the specific benefits brought about by use of the Hayek RTX.

How does Biphasic Cuirass Ventilation help with Secretion Clearance and ventilation for people with Cystic Fibrosis?

Cystic fibrosis (CF) is characterized by the accumulation of thick, tenacious and infected secretions in the lungs.

Removing these secretions remains one of the cornerstones in caring for patients with cystic fibrosis. Physiotherapy is a way of clearing the thick, sticky mucus from the lung

With CF you require daily chest physiotherapy, which involves vigorous massage to assist in loosening the sticky mucus and help prevent the thick, sticky lung secretions from blocking the air tubes. This helps to reduce infection and prevent lung damage.

Parents are taught how to do this for their children. Adults with CF can learn how to administer their own physiotherapy. (see the physiotherapy techniques section below) As well as the physiotherapy to mobilize the secretions within the lungs the forced expiration technique or huff: is used to mobilize and clear secretions up the airways so you can cough them out.

Parents are taught how to do this for their children. Adults with CF can learn how to administer their own physiotherapy. (see the physiotherapy techniques section below)

As well as the physiotherapy to mobilize the secretions within the lungs the forced expiration technique or huff: is used to mobilize and clear secretions up the airways so you can cough them out.
 
 

 
 

Lindey Slevin
Cystic Fibrosis, Home Care Patient

“I perform physio on my own and the Hayek RTX is invaluable. Without the Hayek RTX, there is no way to effectively perform the required percussion to my back area.”

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Biphasic Cuirass Ventilation

Although it is true that Biphasic Cuirass Ventilation uses a cuirass, it would not be accurate to describe the method of ventilation it uses as negative pressure, as the old cuirass ventilators were categorized.

Negative pressure ventilators – While the tank (iron lung) negative pressure ventilators (NPV) provided complete ventilation in some patients with normal lungs (polio, neuromuscular etc.), cuirass NPV per definition could only augment ventilation and could not provide complete ventilation. The reason for this was that whilst the inspiratory phase was active, the passive expiratory phase required time to recoil limiting frequency to most often no more than 30 cycles per minute. As the tidal volume by the cuirass is also limited, minute ventilation (tidal volume x frequency) was low and unable to provide complete ventilation. Furthermore NPV is known to aggrevate heart failure. For these reasons positive pressure replaced it as the preferred method of ventilation.

Biphasic Cuirass Ventilation (BCV) works by controlling both the inspiratory and expiratory phases of the respiratory cycle. BCV uses frequencies ranging from 6 to 1200 cycles per minute, allowing it to also ventilate at high frequency.

As it is Biphasic it is possible to achieve both higher tidal volumes (the sum of the negative inspiratory tidal volume and positive expiratory tidal volume) as well as higher frequencies. Both of these allow for a much higher minute ventilation to be created thus it is often able to provide complete ventilation with normal and sick lungs. BCV has managed to overcome many of the drawbacks of negative pressure ventilation. Furthermore, unlike the old negative pressure machines BCV has been shown in clinical studies, to increase cardiac output.

A further advantage of BCV is its patented cuirass and seal system, which combines flexibility, strength and softness to provide more effective and comfortable ventilation to the patient than other cuirass predecessors which on the whole were much more rigid.