Commentaries on the Surgery of the War in Portugal, Spain, France, and the Netherlands / from the battle of Roliça, in 1808, to that of Waterloo, in 1815; with additions relating to those in the Crimea in 1854-55, showing the improvements made during and since that period in the great art and science of surgery on all the subjects to which they relate.

by G. J. Guthrie

278. The operation of incising the dura mater, to admit of the discharge of blood or matter from beneath, and even of puncturing the brain, has not been much resorted to in England; this may be an error. The records of surgery supply many cases where it might have been done with advantage, and some in which it was done with the greatest benefit to the patient. It is not an operation which ought to be performed without signs sufficiently demonstrative of the necessity for doing it.

I have seen, on the removal of a portion of bone by the trephine, the dura mater rise up rapidly into the opening so as to attain the level of the surface of the skull, totally devoid, however, of that pulsatory motion which usually marks its healthy state. An opening into it, under these circumstances, has allowed a quantity of blood or of purulent matter to escape, proving that the unnatural elevation of the dura mater was caused by the resiliency of the brain when the opposing pressure of the cranium was removed. This tense elevation, its abnormal color, and the absence of pulsation are positive signs of there being a fluid beneath, requiring an incision into the dura mater for its evacuation. It is a point scarcely noticed in English surgery—one which was not in the slightest degree understood at the commencement of the war in the Peninsula.

A. Monro, of the 42d Regiment, was wounded on the 10th of April, at Toulouse, by a musket-ball, which fractured the left parietal bone slightly, without depressing any part of it. No symptoms followed requiring more than ordinary attention until the 23d, up to which time he had been kept on low diet, for the most part in bed, and had been bled and purged. On the evening of that day he became feverish, and hasty and odd in manner, and the pulse quickened; he declared himself, however, to be quite well, and submitted to be bled and physicked with great reluctance, calomel combined with opium being given him at short intervals. On the 24th he complained of pain in the head, which he said was very slight, and that upon the whole he was quite well, and would not be bled nor have anything done. He was bled largely by force, which lowered the strength of the pulse, but did not relieve any of the symptoms of irritation of the brain. On the 25th he was evidently worse, although he declared himself to be quite well; he talked a little incoherently; the pupils were dilated; the pulse quick but regular; the countenance was changed; he was sensible, apparently, upon all points except that of being much worse, which he resolutely denied, saying he was better and would soon be well. Satisfied that matter was forming, or had formed, in or on his brain, I desired that the trephine might be applied on the fractured part and the bone removed. This, however, he would not permit the officers in charge to do, and they awaited my return in the afternoon, when, finding him much worse, I directed it to be done by force, three of his own regiment with others attending to assist the surgeons. He called upon these men by name not to allow him to be murdered in cold blood, declared he was getting well, and would get well if let alone, and prayed them to avenge his death on the doctors if they meddled with him. The surgeons were dismayed, and requested that the operation, which they said required great care, should be performed by me, their chief. I therefore removed the bone; and the moment it was taken away the dura mater rose up in the opening to the level of the surrounding bone, and remained without any pulsatory motion. I had no doubt of matter being beneath, and that, from his general state, the man would die. I did not therefore think it prudent, under all the circumstances, to do more than warn his comrades that, when dead, they would see the whole brain beneath in a state of suppuration. He died that night; and the next day they saw the whole of the left hemisphere soft, yellow, and covered with matter, to their great surprise and satisfaction at the accuracy of the diagnosis.

Absalom Lorimer, of the 42d Regiment, was wounded by a musket-ball on the 10th of April, 1814, at the battle of Toulouse, which carried away a small portion of the scalp just above the right temple, fracturing the bone slightly, but without any depression. No symptoms occurred demanding more than ordinary attention for the first fortnight, during which period he had been bled once, purged, and kept on low diet. On the 25th, he complained of pain in his head around the wound, shooting to the back part; pulse 60; pupils dilated. An incision having been made to the bone, the pericranium was found detached, and the bone fractured, but without any obvious depression. V. S. ad ℥xx, calomel and colocynth: as the pain continued, the bleeding was repeated in the evening. 26th. Pain in the head greatly relieved; pulse 60; bowels torpid. Ten ounces of blood were taken from the temporal artery, and the calomel and colocynth, salts and senna were repeated. On the morning of the 29th, the symptoms of compression having increased, the trephine was had recourse to, and the fractured portion of bone was removed: a layer of coagulated blood was found on the dura mater, which puffed up into the opening. In the evening he became convulsed, the pulse intermitted, and he died. On examination, a large abscess was found in the right hemisphere of the brain, having the ventricle for its base, with some matter on the surface of the brain, and between the dura mater and the bone at the base of the cranium.

On the morning of the day that I performed this operation, I had done another of the same kind at the Hôpital des Minimes; the dura mater rose up in a similar manner without pulsation into the opening made by the removal of the circular piece of bone by the trephine; on puncturing it a considerable quantity of pus oozed out. The opening was enlarged; and the flow of matter was daily encouraged, until it gradually diminished, and ceased with the formation of granulations, and the drawing in and cicatrization of the part.

279. It has been supposed theoretically that a wound through the dura mater was particularly dangerous, in consequence of the tunica arachnoides which lines it being a serous membrane; and that, if the inflammation which ensued did not cease at the adhesive stage, by the consolidation of the surface which covered the pia mater with that which lined the dura mater, a diffuse inflammation would necessarily follow, which might spread over its whole extent. This has not been found practically to be the case; and if a simple wound of the dura mater be a danger that ought to be avoided, the risk run cannot be put in comparison with that which accompanies the continuous irritation depending on the presence of a spicula of bone, which has passed through the dura mater, and is irritating the brain beneath. It has also been supposed theoretically that the danger would be diminished if the pia mater were wounded also, as the brain would project and fill the wound; but the accuracy of this opinion may be doubted. If the dura mater were injured through error or design, I should not think the evil lessened by adding to it a wound of the pia mater, and perhaps also of the brain.

By those who have been accustomed to the terrible injuries which occur in military warfare, in which large portions of the brain are sometimes exposed, and even lost, without much inconvenience following, the exposure of or the opening into the dura mater is not considered of so much importance as it is by those who have had fewer opportunities of seeing such awful cases; while the formation and retention of matter below the bones of the cranium is, on the other hand, more dreaded by those who have often seen their ill effects than by those who have not had many occasions for observing them; by whom, however, they are often considered, when they do take place, to be irremediable by art.

280. Gunshot wounds of the skull are attended by certain peculiarities. In ordinary circumstances there is usually an external wound and a fracture more or less comminuted, with depression; this wound will almost always require to be enlarged by a simple incision, so as to show the extent of the depression or the size of the broken and depressed portions of bone. When the bone is scarcely injured, and the periosteum is only bruised, or when the bone is even deprived of this covering, it does not follow that it should die or even exfoliate. In many instances the wound will gradually close in and heal, as if no such evil had occurred; and in those which do not terminate so favorably, the cure may only be delayed by the exfoliation of a layer or scale of bone from its outer surface, unless the mischief should have implicated the parts beneath.

A musket-ball striking directly against a bone sometimes makes a hole not larger than itself, with or without any radiating fracture; and one large trephine, if properly applied, will often embrace the whole of the mischief, and admit of the removal of the broken pieces. As a center-pin cannot be used, the trephine may be made to turn very well in most cases in a flat but thick bar of iron, having a hole in the middle, of such a size only as will allow the polished outside of the trephine to turn in it. Sufficient support for the instrument will be obtained by this means until it has made a groove in the bone for itself, when the operation may be continued as it would be in an ordinary case after the removal of the center-pin.

When a musket-ball ranges along the side or top of the head, it may break the outer, and depress and fracture the inner table to a considerable extent, for the space even of three or more inches. The broken portions of bone may in general be removed by means of good forceps and a straight saw; and no good reason can be given for delaying the operation unless the nature of the injury be doubtful, when it may be as well to wait for symptoms. It sometimes happens, although rarely, that a ball sticks so firmly in the bone that it cannot be extracted by working round it in any ordinary way with a pointed instrument. The difficulty usually arises from the ball having half buried itself in the diploe, so little of it being exposed as not to admit of a firm hold being taken of it. The large trephine, used in the way pointed out, has several times overcome this difficulty. The removal of the outer table has been sufficient where the inner one has not been driven into the dura mater; when any doubt is entertained on this point both should be removed.