In the operation for dividing the tendo-Achillis the patient may either lie on his abdomen or sit on a chair, and the heel is to be drawn downwards by an assistant with the left hand, the right being placed upon the plantar surface of the toes. The necessary tension being thus given to the part that is to be cut, the surgeon passes a narrow, straight, sharp-pointed bistoury through the skin, from one to two inches above the internal malleolus, flatwise between the tendon and the deep-seated structures. The knife is then pushed on until it reaches the opposite side of the tendon, when its edge is brought in contact with the anterior surface of the chord, which is now completely divided by steady pressure upon the handle of the instrument. The separation of the parts is indicated by an audible snap, and by the immediate cessation of the tense resistance of the tendo-Achillis. Scarcely a drop of blood is lost during the operation, which is almost unattended with pain, and is accomplished in a few seconds. A strip of adhesive plaster is applied over the little puncture, which generally heals by union by the first intention; and the limb, laid in an easy position, should be supported by a paste-board splint and a common roller. The apparatus for keeping up permanent extension may be advantageously employed in three or four days after the operation.
The interval between the divided extremities of the tendon is filled up with coagulating lymph, which is often poured out in considerable quantities. As in other situations, it becomes gradually organised, and is finally converted into a firm, dense substance, not unlike the original structure.
The tendon of the posterior tibial muscle may be cut most advantageously about two inches above and behind the internal malleolus. The operation is conducted upon the same principles as in the preceeding case, and the only particular caution to be observed is to avoid the posterior tibial artery and nerve, which might be endangered by carrying the knife too deeply. The most favourable situation for dividing the anterior tibial muscle, is where it passes over the ankle-joint: the long flexor of the great toe may be cut in the sole of the foot, where, when it interferes with the rectification of the limb, it forms a tense, prominent chord.—ED.]
The phalanges of the toes in general resemble those of the fingers in their diseased actions. Exostosis of the extremity of the distal phalanx, however, has no analogy in the upper extremity; it is by no means an uncommon affection, and usually occurs in the great toe. The growth is generally globular and rough in its extremity, narrow at its origin, attached on the dorsal aspect, projecting obliquely upwards, and always of similar structure with the phalanx. Sometimes they are
met with of a size nearly equal to that of the bone from which they spring, but the majority are considerably smaller. The only one I have met with springing from a small toe is here sketched. At first the patient complains merely of pain in the part while walking; soon the pain increases so as to impede progression very seriously; then the nail is found to be raised at its margin, and to cover a hard, unyielding, and tender swelling. The elevation of the nail increases, and the tumour becomes more apparent, covered by hardened cuticle, causing great uneasiness, and almost entirely preventing walking exercise.
It has been recommended to expose the tumour by incision, and remove it at its origin. This affords temporary relief, but the disease is generally in no long time reproduced, and the incision must either be repeated, or the phalanx amputated. The preferable practice, according to my experience, is to remove the phalanx at once. It is less tedious and painful than the incision, produces very little, if any, impediment to progression, and of course is quite effectual in eradicating this most annoying though apparently simple disease.
Of Fractures.—Deformity, shortening, loss of power, unnatural motion on extending and moving the part, pain, and grating, mark solution of
continuity in bone, or fracture. Swelling, with spasmodic of these symptoms may be wanting; there is little deformity, and no shortening, when one of two or more action of the muscles, soon takes place. One or several parallel bones is fractured. In fracture of the extremities, extrication of air into the cellular tissue, about the ends of the bone, is not unfrequent, though difficult to account for—giving rise to crepitation, superficial, and quite a distinct sensation from that imparted by the broken bone.