Ombredanne Inhaler


Apparatus for administration of inhaled anesthetics developed by French physician Louis Ombredanne (1871-1956). Originally designed for the ether administration. This apparatus was extensively used, especially in Europe and also in our midst, until the middle of last century. The images below are from a model produced by "Aesculap".


Murphy Obstetric Inhaler


Designed for use during labor analgesia by the obstetrician Edward William Murphy. The chloroform should be embedded in the cotton present in the reservoir. The device was manipulated by the own pregnant who ran the inhalational agent according to her need.


Ellis Obstetric Inhaler


Developed specifically for use during labor analgesia by Robert Ellis (1822-1885). This device used a mixture of alcohol, ether and chloroform in order to minimize the side effects of the isolated use of the latter agent. It is designed to be manipulated by the very pregnant woman, who self-administered the anesthetic mixture.


Blake Inhaler


Designed for ether administration. The larger part of the cone should cover the mouth and nose and the inhaled agent dripped from the top, soaking the cloth that was wrapped in the inner cone (metal grille).


Junker Inhaler


Designed and developed by the German surgeon, based in London, FE Junker. It became extremely popular at that time since had a range of technological innovations. Even included a safety valve within the face mask to avoid excessive pressures on the system. The new features incorporated in this device led to it being considered one of the most important precursors of universal vaporizers later appearing.


Trichlorethylene Inhaler

Trichloroethylene was used as an inhaled anesthetic until about the 60s of last century. Its use in obstetrics has been extremely popular, including Brazil, for labor inhalation analgesia. Prolonged administration of high concentrations could lead to neurological and cardiovascular complications, which made this agent being gradually abandoned and replaced by neuroaxiais analgesia techniques. Below the image of some vaporizers and systems specific for trichlorethylene from different manufacturers.

Some Historical Devices Used in Obstetric Anesthesia

Replica of the inhaler used by Thomas Morton, in the first clinical anesthesia public exhibition, in october 16, 1846.