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authors know of an unreported case in which a man running in the street touched his hand to a hitching block he was passing； a ring on one of his fingers caught in the hook of the block； and tore off the finger with the attached tendon and muscle。 There is a similar instance of a Scotch gentleman who slipped； and； to prevent falling； he put out his hand to catch the railing。 A ring on one of his fingers became entangled in the railing and the force of the fall tore off the soft parts of the finger together with the ring。
The older writers mentioned as a curious fact that avulsion of the arm； unaccompanied by hemorrhage； had been noticed。 Belchier； Carmichael； and Clough report instances of this nature； and； in the latter case； the progress of healing was unaccompanied by any uncomfortable symptoms。 In the last century Hunezoysky observed complete avulsion of the arm by a cannon…ball； without the slightest hemorrhage。 The Ephemerides contains an account of the avulsion of the hand without any bleeding； and Woolcomb has observed a huge wound of the arm from which hemorrhage was similarly absent。 Later observations have shown that in this accident absence of hemorrhage is the rule and not the exception。 The wound is generally lacerated and contused and the mouths of the vessels do not gape； but are twisted and crushed。 The skin usually separates at the highest point and the muscles protrude； appearing to be tightly embraced and almost strangulated by the skin； and also by the tendons； vessels； and nerves which； crushed and twisted with the fragments of bone； form a conical stump。 Cheselden reports the history of a case； which has since become classic； that he observed in St。 Thomas' Hospital in London； in 1837。 A miller had carelessly thrown a slip…knot of rope about his wrist； which became caught in a revolving cog； drawing him from the ground and violently throwing his body against a beam。 The force exerted by the cog drawing on the rope was sufficient to avulse his whole arm and shoulder…blade。 There was comparatively little hemorrhage and the man was insensible to pain； being so dazed and surprised he really was unconscious of the nature of his injury until he saw his arm in the wheel。
According to Billroth the avulsion of an arm is usually followed by fatal shock。 Fischer； however； relates the case of a lion…tamer whose whole left arm was torn from the shoulder by a lion； the loss of blood being very slight and the patient so little affected by shock that he was able to walk to the hospital。
Mussey describes a boy of sixteen who had his left arm and shoulder…blade completely torn from his body by machinery。 The patient became so involved in the bands that his body was securely fastened to a drum； while his legs hung dangling。 In this position he made about 15 revolutions around the drum before the motion of the machinery could be effectually stopped by cutting off the water to the great wheel。 When he was disentangled from the bands and taken down from the drum a huge wound was seen at the shoulder； but there was not more than a pint of blood lost。 The collar…bone projected from the wound about half an inch； and hanging from the wound were two large nerves （probably the median and ulnar） more than 20 inches long。 He was able to stand on his feet and actually walked a few steps； as his frock was opened； his arm； with a clot of blood； dropped to the floor。 This boy made an excellent recovery。 The space between the plastered ceiling and the drum in which the revolutions of the body had taken place was scarcely 7 1/2 inches wide。 Horsbeck's case was of a negro of thirty…five who； while pounding resin on a 12…inch leather band； had his hand caught between the wheel and band。 His hand； forearm； arm； etc。； were rapidly drawn in； and he was carried around until his shoulder came to a large beam； where the body was stopped by resistance against the beam； fell to the floor； and the arm and scapula were completely avulsed and carried on beyond the beam。 In this case； also； the man experienced little pain； and there was comparatively little hemorrhage。 Maclean reports the history of an accident to a man of twenty…three who had both arms caught between a belt and the shaft while working in a woolen factory； and while the machinery was in full operation。 He was carried around the shaft with great velocity until his arms were torn off at a point about four inches below the shoulder…joint on each side。 The patient landed on his feet； the blood spurting from each brachial artery in a large stream。 His fellow…workmen； without delay； wound a piece of rope around each bleeding member； and the man recovered after primary amputation of each stump。 Will gives an excellent instance of avulsion of the right arm and scapula in a girl of eighteen； who was caught in flax…spinning machinery。 The axillary artery was seen lying in the wound； pulsating feebly； but had been efficiently closed by the torsion of the machinery。 The girl recovered。
Additional cases of avulsion of the upper extremity are reported by Aubinais； Bleynie； Charles； George； James； Jones； Marcano； Belchier； Braithwaite； and Hendry。
Avulsion of the Lower Extremity。The symptoms following avulsion of the upper extremity are seen as well in similar accidents to the leg and thigh； although the latter are possibly the more fatal。 Horlbeck quotes Benomont's description of a small boy who had his leg torn off at the knee by a carriage in motion； the child experienced no pain； and was more concerned about the punishment he expected to receive at home for disobedience than about the loss of his leg。 Carter speaks of a boy of twelve who incautiously put the great toe of his left foot against a pinion wheel of a mill in motion。 The toe was fastened and drawn into the mill； the leg following almost to the thigh。 The whole left leg and thigh； together with the left side of the scrotum； were torn off； the boy died as a result of his injuries。
Ashurst reported to the Pathological Society of Philadelphia the case of a child of nine who had its right leg caught in the spokes of a carriage wheel。 The child was picked up unconscious； with its thigh entirely severed； and the bone broken off about the middle third； about three inches higher the muscles were torn from the sheaths and appeared as if cut with a knife。 The great sciatic nerve was found hanging 15 inches from the stump； having given way from its division in the popliteal space。 The child died in twelve hours。 One of the most interesting features of the case was the rapid cooling of the body after the accident and prolongation of the coolness with slight variations until death ensued。 Ashurst remarks that while the cutaneous surface of the stump was acutely sensitive to the touch； there was no manifestation of pain evinced upon handling the exposed nerve。
With reference to injuries to the sciatic nerve； Kuster mentions the case of a strong man of thirty； who in walking slipped and fell on his back。 Immediately after rising to his feet he felt severe pain in the right leg and numbness in the foot。 He was unable to stand； and was carried to his house； where Kuster found him suffering great pain。 The diagnosis had been fracture of