Anæsthesia and anæsthetics general and local . _ j\ \ REBREATHEDGAS Fig. 21.—Diagram of Goldans Stop Cock. Fig. 21. Dotted lines indicate external part of stop-cock, heavy linesand shaded part, internal tube. Arrows indicate direction of inspirationand expiration. The valves are indicated by shaded lines. A. Inspira-tory valve. B. Expiratory valve. C. Index handle. D. Right-angled Proximal end of stop-cock, attaching face-piece. X. Handle turneddown; air breathed. X2. Handle turned up; gas breathed. X3. Handleturned up and back; gas breathed back and forth into gas-bag. oxygen. In from
Anæsthesia and anæsthetics general and local . _ j\ \ REBREATHEDGAS Fig. 21.—Diagram of Goldans Stop Cock. Fig. 21. Dotted lines indicate external part of stop-cock, heavy linesand shaded part, internal tube. Arrows indicate direction of inspirationand expiration. The valves are indicated by shaded lines. A. Inspira-tory valve. B. Expiratory valve. C. Index handle. D. Right-angled Proximal end of stop-cock, attaching face-piece. X. Handle turneddown; air breathed. X2. Handle turned up; gas breathed. X3. Handleturned up and back; gas breathed back and forth into gas-bag. oxygen. In from twenty to twenty-five seconds the indicatormay be brought up to six or seven, which will probably be suffi-cient for dental operations. In longer surgical operations aprogressive increase in the amount of oxygen is generally ad-visable. Operative proceedings may begin within from two to threeminutes of the application of the face-piece. NITROUS OXIDE 92
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