Although there are many forms of apparatus for differential pressure, we are still in need of a reliable and simple one that will enable us, in any hospital, to safely open the chest. Most forms of apparatus are either cumbersome and costly or unsatisfactory. The Meltzer and Auer method is the one in greatest favor at present and again proves the rule that in surgery, as in other lines, the guide to success is simplicity and efficiency.
In the method to be described, the differential-pressure apparatus is the size of a jack-knife and there is no more difficulty in applying it than in giving the ordinary gas and oxygen anesthesia.
Nitrous oxid with oxygen has the following advantages over ether as an anesthetic for thoracic work:
1. It is the only general anesthetic which will allow the continuous application of a mask to the face throughout the operation. Ether causes
BUNNELL S. THE USE OF NITROUS OXID AND OXYGAN TO MAINTAIN ANESTHESIA AND POSITIVE PRESSURE FOR THORACIC SURGERY. JAMA. 1912;LVIII(12):835–838. doi:10.1001/jama.1912.04260030233003
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