Some points in the anatomy, pathology, and surgery of intussusception . nd the serous coat is continuouswith the slightly congested mesentery. The section from the experimental invagination in a cat maybe compared very profitably with one^ (Fig- 6) taken from theileum of a dog killed by an intussusception which occurredspontaneously. An extensive extravasation of blood has doneserious injury to the mucous membrane by surrounding and com-pressing the glands and the villi. It has separated the fibres of1 St. Barth. Hosp. Museum, No. 2192. INTUSSUSCEPTION 15 the muscularis mucosae one from anothe
Some points in the anatomy, pathology, and surgery of intussusception . nd the serous coat is continuouswith the slightly congested mesentery. The section from the experimental invagination in a cat maybe compared very profitably with one^ (Fig- 6) taken from theileum of a dog killed by an intussusception which occurredspontaneously. An extensive extravasation of blood has doneserious injury to the mucous membrane by surrounding and com-pressing the glands and the villi. It has separated the fibres of1 St. Barth. Hosp. Museum, No. 2192. INTUSSUSCEPTION 15 the muscularis mucosae one from another, and it has caused greatthickening of the submucous tissue. The circular layer of muscleis profoundly affected (Fig. 7). Its blood-supply is greatly in-creased, and its lymphatics are so much enlarged that the musclehas become oedematous. The oedema, in turn, has reacted uponthe muscle fibres, so that hardly one in ten is healthy (Fig. 8),the remainder having undergone an inflammatory change whichhas led to a loss of all structural details in the transverse section. Fig. 7.—Section through the muscular layer of the intestine, from the same caseas the preceding specimen. The circular muscle is oedematous and degenerate,whilst the longitudinal coat is healthy. of its fibres. The longitudinal layer of muscle (Fig. 7) is hardlyaltered. The structure and outHnes of the individual fibres aredistinct, but there has been a slight extravasation of blood con-tinuous vyith an extravasation which has occurred between thelongitudinal layer of muscle and the serous coat of the intestine. The changes shown by these specimens form an interestingseries, and are typical of many others which I have show that the mucous membrane, the submucous tissue,and the circular layer of muscle suffer more severely in the earlystages of an intussusception than the longitudinal layer of themuscle or the serous coat. i6 SOME POINTS IN THE MINUTE ANATOMY OF The changes in the submucous coat are
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