1911 Encyclopædia Britannica/Electrotherapeutics
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Within the phosphates the phosphorus is a part of a complex ion possessing fairly different properties to these of the phosphorus ion of the phosphides. The one part exposed is the metallic knob; the remaining is coated with some insulating material. Within the medical application of these information it have to be remembered that when an ion is introduced into the physique by electrolysis, it is probably forced into the precise cellular constituents of the body, whereas the drug administered by one among the standard methods though circulating within the blood could maybe by no means achieve entry to the cell itself. Solutions which conduct electric currents are known as electrolytes, and in the case of the human body the electrolyte is the entire mass of the saline constituents in solution all through the physique. This sclerolytic property of the current is applicable to all components of the physique accessible to the present. And once more electrolysis will also be used for extracting from the body such ions as are injurious, as uric and oxalic acid from a patient affected by gout.
Thus a strong acid is one which is much dissociated, a weak acid one that has undergone however little dissociation and so forth. In 1896-1897 it was proven that the bactericidal action of salts varies with their degree of dissociation and subsequently will depend on the focus of the lively ions. The response of degeneration in the nerve is shown by disappearance of reaction to either type of present, preceded for some days by hyperexcitability to either current. Wrist drop from lead poisoning and lead neuritis of all kinds, reflex muscular atrophy and the muscular losing of hemiplegia, are all benefited by the steady current; the severe pain of sciatica, and the inflammation of the nerve sheath in these instances, could be arrested more rapidly by galvanic therapy than in another approach. Thus RD is present in infantile paralysis, acute neuritis, &c., however absent in progressive muscular atrophy where the losing of nerve and muscle takes place extraordinarily slowly. Where the muscle wasting is because of a lesion in the muscle alone, as in ischaemic myositis (normally on account of damage from tight bandaging or badly applied splints), no reaction of degeneration is discovered; the one change is a loss of energy within the contraction.
If a muscle be stimulated over its motor point, it should contract with a sharp twitch and then become quiescent. They occur solely after sudden or acute harm to the nerve cells of the anterior horn of the spinal cord, or to the motor nerve fibres proceeding from these cells. If the damage to the anterior horn cells be only very slight, there may solely be partial RD, and the prognosis is given in line with the extent of RD. For the reason that toxic or therapeutic motion of a solution is due to its ions, the action should be proportional to the variety of ions in a given volume, that is, the action of an electrolyte depends upon the degree of dissociation. But a certain number of molecules do not dissociate, and hence in an electrolytic resolution there are impartial molecules, anions and kations. The anions carry damaging prices and are consequently attracted by the constructive electricity of the anode. When a current is passed by way of an electrolyte, dissociation into ions takes place, the ions which are freed spherical the anode being referred to as anions and those which are freed round the kathode being referred to as kations.
The kations carry positive fees, therefore they are repelled by the anode and attracted by the kathode. KCC. Also within the more severe types of nerve harm tetanic contractions may be set up in the paralysed muscles, by closure of the current either on the anode or kathode. As defined above, when the nerve supplying a muscle is diseased it not responds to the faradic present. This form of contraction is that obtained when the muscle fibre itself is stimulated. And if the muscle be normal the opening contraction KOC and AOC should not seen. Some are extraordinarily toxic, whereas others are quite harmless. Cases of chronic iritis with adhesions and outdated pleural adhesions are additionally suited for this technique of procedure. Old circumstances of rheumatic scleritis, totally unaffected by the routine therapy of salicylates and iodide, have usually cleared up entirely underneath electrolytic treatment. Cases of rodent ulcer unaffected by all other methods of therapy have been cured by electric kataphoresis with zinc ions, and the method is now being utilized to the therapy of inoperable malignant tumours.
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