Tradizione e Innovazione nella Tuscia Romana

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The Servo Story  (continues)

Forty years of innovation in ventilation (continues)

The Servo revolution


The Servo Story

Forty years of innovation in ventilation

The Servo revolution

Boldly going where no other ventilator could go before

The Servo 900B – CO2 measurement comes into the mix

The 1980s – Re-setting the world's ventilation standards

An 80s favourite in every department

Servo 300 – Leaping into the age of microprocessing

Working together to be better

Accelerated research and clinical applications

Servo-i – Making waves with modularity

Ongoing clinical and technological development

New lung protective tools

NAVA – The latest standard-setter in mechanical ventilation

True synchrony – For real

What's next

The Servo Story

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The Servo Story

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Libro dei Visitatori


The Servo Story (continues)



















Forty years of innovation in ventilation (continues)



















The Servo revolution


















Lund University Hospital in the South of Sweden had a long history of inventing ventilators, including the Barospirator (an iron lung variant) from the 1920s, Cuirass ventilators from the 1940s, and the Lundia ventilator from the 1950s.


In 1967, Clinical Physiologist Björn Jonson was busy testing what he thought was the ultimate new ventilator design.


His initial sparring partner was Professor of Otolaryngology (diseases of the ear, nose and throat), Sven Ingelstedt, who was convinced that ventilators should be flow controlled – but considered it virtually impossible to achieve.

In contrast to the design of commercially available ventilators, the new model was based on a
very low compressible volume and had few moving parts.


It also featured a separate gas delivery and monitoring system with a feedback loop to accurately regulate the flow delivered to the patient.

In other words, it could be
flow controlled.

Jonson knew he
needed a partner with strong knowledge of modern electronics to commercialize his idea.


Sven-Gunnar Olsson, an ECG salesman at Elema-Schönander with an engineering background, joined him.



Together, they started the project to build and commercialize the first electronically controlled ventilator.


Anaesthesiologist Lars Nordström also came aboard as clinical teacher, assuring adaptation to daily clinical use as well as initial testing.







Sven Ingelstedt, Björn Jonson and Lars Nordström celebrating a prototype milestone in 1970.