The art of anaesthesia . which they are dissolved. Quinine and Urea.—Strength commonly used .5 to1 per cent. This solution is said to be absolutely non-toxic. The anaesthetic effects which it produces are morelasting than those of cocaine or novocaine. Because ofthis prolonged effect it is often used with a view of control-ling post-operative pain. Some have claimed that it helpsto control hemorrhage after operation by causing a depositof fibrin over the exposed vessels; others have contendedthat its employment interfered with the healing of thetissues. If one wishes a prolonged action it is w
The art of anaesthesia . which they are dissolved. Quinine and Urea.—Strength commonly used .5 to1 per cent. This solution is said to be absolutely non-toxic. The anaesthetic effects which it produces are morelasting than those of cocaine or novocaine. Because ofthis prolonged effect it is often used with a view of control-ling post-operative pain. Some have claimed that it helpsto control hemorrhage after operation by causing a depositof fibrin over the exposed vessels; others have contendedthat its employment interfered with the healing of thetissues. If one wishes a prolonged action it is well to waitfifteen to twenty minutes before incising the tissuesinjected. USUAL METHODS 257 The Syringe.—The ordinary hypodermic syringe ofall glass or metal is entirely satisfactory (Fig. 113).Syringes should be boiled in plain water and after usingdried carefully and a drop of castor oil run in. This pre-vents the sticking of the piston in the all glass syringe andthe drying out of the packing in the metal Fig. 113.—Case containing outfit for intraspinal and local anaesthesia. (Steel, International Clinics.) Needles.—Steel needles are satisfactory. A varietyof sizes should be on hand. These should range from theordinary short hypodermic needles to those 10 cm. inlength. Nickel and platinum needles may be had, and bytheir longer life are worth the difference in the purchaseprice. The Preliminary Treatment of the Patient whois to Receive the Infiltration (Terminal) or theConductive (Regional) Anaesthesia.—An hour before 17 258 ANAESTHESIA operation a dose of morphine gv. % and scopolamine should be given. The operation, no matter how trivial, should be invaria-bly done with the patient lying down. The patient should have a cup of soup or milk. It isbest not to operate on an empty stomach. It will be readily understood that the proper employ-ment of suggestion is most important. This applies notonly to the immediate treatment of the individual butesp
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