. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . r white heat, enables us, on account of the obliterationof smaller vessels and coagulation of the blood, to sever tissue withouthemorrhage. The greater the heat of the electrode, the less pain is produced, butthere is greater liability of subsequent hemorrhage; therefore, a cherry-red heat, which is a temperature intermediate between red and whiteheat, is usually the most satisfactory. Electro-cautery is emplov
. Principles of electro-medicine, electro-surgery and radiology : a practical treatise for students and practioners, with chapters on mechanical vibration and blood pressure technique . r white heat, enables us, on account of the obliterationof smaller vessels and coagulation of the blood, to sever tissue withouthemorrhage. The greater the heat of the electrode, the less pain is produced, butthere is greater liability of subsequent hemorrhage; therefore, a cherry-red heat, which is a temperature intermediate between red and whiteheat, is usually the most satisfactory. Electro-cautery is emploved to remove polypi and tumors difficult toreach with the knife; to cut through the cervix uteri; to remove growthsin the pharynx and larynx, and to cauterize laryngeal ulcers; to destroythe nerve iii a hollow tooth; to arrest hemorrhage; to treat some cases ofprostatic hypertrophy; to open an abcess in the lung after a rib hasbeen resected, etc. In order to be able to heat the platinum cautery electrodes (loops orknives) which have a very low resistance, (varying from to of anohm, or even less) to a cherry-red or white heat, a current of a low volt- 84 Anthony Matijaca. Fig. 31—Cautery generator. age and high amperage (5 to 30 amperes) is required. This current isobtained from a galvanic battery in which the cells are connected inmultiple or parallel, or from a cautery apparatus (Fig. 31) by which thecommercial current of high voltage and low amperage is transformedinto a current of high amperage and low voltage. The strength of the current is regulated by means of a rheostat andis measured by means of an ampere-meter, which is of great value, espe-cially when working in cavities when the knife is not readily visible, asit will warn us if we are in danger of fusing the wire. Fulguration Fulguration is a mono-polar discharge from a metal point electrodeconnected to the top of the Oudin resonator, Tesla secondary or a hyper-static transformer. By means of this dischar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectelectri, bookyear1917
