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Anesthesia For Peroral EndoscopyCategory: ANESTHESIA FOR PERORAL ENDOSCOPY Source: A Manual Of Peroral Endoscopy And Laryngeal Surgery A dyspneic patient should never be given a general anesthetic. Cocaine should not be used on children under ten years of age because of its extreme toxicity. To these two postulates always in mind, a third one, applicable to both general and local anesthesia, is to be added--total abolition of the cough-reflex should be for short periods only. General anesthesia is never used in the Bronchoscopic Clinic for endoscopic procedures. The choice for each operator must, however, be a matter for individual decision, and will depend upon the personal equation, and degree of skill of the operator, and his ability to quiet the apprehensions of the patient. In other words, the operator must decide what is best for his particular patient under the conditions then existing. Children in the Bronchoscopic Clinic receive neither local nor general anesthesia, nor sedative, for laryngoscopic operations or esophagoscopy. Bronchoscopy in the older children when no dyspnea is present has in recent years, at the suggestion of Prof. Hare, been preceded by a full dose of morphin sulphate (i.e., 1/8 grain for a child of six years) or a full physiologic dose of sodium bromide. The apprehension is thus somewhat allayed and the excessive cough-reflex quieted. The morphine should be given not less than an hour and a half before bronchoscopy to allow time for the onset of the soporific and antispasmodic effects which are the desiderata, not the analgesic effects. Dosage is more dependent on temperament than on age or body weight. Atropine is advantageously added to morphine in bronchoscopy for foreign bodies, not only for the usual reasons but for its effect as an antispasmodic, and especially for its diminution of endobronchial secretions. True, it does not diminish pus, but by diminishing the outpouring of normal secretions that dilute the pus the total quantity of fluid encountered is less than it otherwise would be. In cases of large quantities of pus, as in pulmonary abscess and bronchiectasis, however, no diminution is noticeable. No food or water is allowed for 5 hours prior to any endoscopic procedure, whether sedatives or anesthetics are to be given or not. If the stomach is not empty vomiting from contact of the tube in the pharynx will interfere with work. With adults no anesthesia, general or local, is given for esophagoscopy. For laryngeal operation and bronchoscopy the following technic is used: One hour before operation the patient is given hypodermatically a full physiologic dose of morphin sulphate (from 1/4, to 3/8 gr.) guarded with atropin sulphate (gr. 1/150). Care must be taken that the injection be not given into a vein. On the operating table the epiglottis and pharynx are painted with 10 per cent solution of cocain. Two applications are usually sufficient completely to anesthetize the exterior and interior of the larynx by blocking of the superior laryngeal nerve without any endolaryngeal applications. The laryngoscope is now introduced and if found necessary a 20 per cent cocain solution is applied to the interior of the larynx and subglottic region, by means of gauze swabs fastened to the sponge carriers. Here also two applications are quite sufficient to produce complete anesthesia in the larynx. If bronchoscopy is to be done the gauze swab is carried down through the exposed glottis to the carina, thus anesthetizing the tracheal mucosa. If further anesthetization of the bronchial mucosa is required, cocain may be applied in the same manner through the bronchoscope. In all these local applications prolonged contact of the swab is much more efficient than simply painting the surface. [67] In cases in which cocain is deemed contraindicated morphin alone is used. If given in sufficient dosage cocain can be altogether dispensed with in any case. It is perhaps safer for the beginner in his early cases of esophagoscopy to have the patient relaxed by an ether anesthesia, provided the patient is not dyspneic to begin with, or made so by faulty position or by pressure of the esophagoscopic tube mouth on the tracheoesophageal party wall. As proficiency develops, however, he will find anesthesia unnecessary. Local anesthesia is needless for esophagoscopy, and if used at all should be limited to the laryngopharynx and never applied to the esophagus, for the esophagus is without sensation, as anyone may observe in drinking hot liquids. Direct laryngoscopy in children requires neither local nor general anesthesia, either for diagnosis or for removal of foreign bodies or growths from the larynx. General anesthesia is contraindicated because of the dyspnea apt to be present, and because the struggles of the patient might cause a dislodgment of the laryngeal intruder and aspiration to a lower level. The latter accident is also prone to follow attempts to cocainize the larynx. Next: Technic For General Anesthesia Previous: Preparation Of The Patient For Peroral Endoscopy
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