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Wednesday, April 22, 2009

Boyle's machine

In medicine Boyle's machine is the name given to the continuous flow apparatus used by anesthesiologists to administer general anesthesia to patients (human or veterinary) in operation theaters.

Medical grade oxygen, nitrous oxide and inhalation anaesthetics can be administered to patients, who are either breathing spontaneously or who have been paralysed for the course of the surgical procedure using neuromuscular blocking drugs. Two breathing systems are usually present on the machine, one is the Magill's circuit or a universal Bain's breathing system, and less commonly, a circle absorber utilising sode lime granules to remove carbondioxide exhaled by the patient.

The British anesthesiologist, Dr. Henry Edmund Gaskin Boyle is credited with designing the first anesthesia machine, hence the name. Henry Edmund Gaskin Boyle (2 April 1875 – 15 October 1941) was a pioneering anaesthesiologist. Originally born in Barbados; he qualified MRCS LRCP from St Bartholomew's Hospital, London. He is best remembered for the development of early anesthetic machines. Even until recently, an anesthesia machine for administering general anesthesia would often be referred to as a "Boyle's Machine" in honor of his contribution in this field. His design included cylinders for medical oxygen, nitrous oxide and a "Boyle's Bottle" to vaporize diethyl ether. His other contribution to anesthesia included the Boyle-Davis gag, which is still used today during tonsillectomy operations.

The British Oxygen Company (BOC) marketed their anaesthesia machines under the Boyle name in India, for a number of years. These devices were manufactured by the welding giant ESAB India Ltd.'s factory at Kolkata, India. Following the merger of healthcare business of BOC (Ohmeda) with Datex, with the new entity being called Datex-Ohmeda, the ESAB manufacturing facility at Kolkata started selling their anesthesia machines directly to distributors, located all over India.

However, with the acquisition of Datex-Ohmeda by GE Healthcare, Boyle machines are now again being sold in India. These are being manufactured by a contractor for Datex-Ohmeda.

The Boyle trade-mark is registered with Boyle HealthCare Pvt. Ltd. an Indore MP India based company, headed by Dr. Atul Dixit,MD (anesthesiology). They are holding all rights to this trademark after registration with the registrar of trade marks and patents, government of India. GE Datex-Ohmeda Bangalore India are infringing on Boyle HealthCare's rights by selling their anesthesia machines under the 'Boyle' label.

Retrieved from "http://en.wikipedia.org/wiki/Boyle%27s_machine"

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