Endurance reducing valve from an anaesthetic machine,circa 1940. These valves were used to regulate the pressure of anaesthetic gases,such as oxygen and nitrous oxide,from pressurised gas cylinders. The valves allowed control of the pressure of gases reaching the patient during general anaesthesia. Compressed gases in cylinders were introduced in the late 19th century | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 5107 px × 3422 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |