On varieties of the appendix vermiformis, caecum, and ileo-colic valve in man / by John Struthers.

  • John Struthers
Date:
[1893?]
Catalogue details

Licence: Public Domain Mark

Credit: On varieties of the appendix vermiformis, caecum, and ileo-colic valve in man / by John Struthers. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    13/42 (page 11)
    join the posterior fraenum. The attached margin is generally entirely convex in front, generally concave posteriorly on the upper half. When the ileum passes far back, the lower flap is long and much bent, the whole of the attached margin concave towards the great intestine. In case 9, in which the ileum descends, both flaps are uniformly convex at their attached margin, the posterior horn of the lower flap going almost straight up to join in the fraenum. The horns of the lower flap both run up to join the upper, so as to complete the circle of the curtain. The free margin of the anterior horn turns backwards, rounding the broad anterior end of the orifice, forming the narrowest part of the curtain, £ to £ inch broad, adhering to the sharp anterior fraenum on its surface. The completeness of the circular curtain is accomplished posteriorly by the horn of the lower flap joining the upper flap broadly where the fraenum begins. The line of junction may be for 1 inch forwards and outwards to the sharp posterior end of the orifice, the free edge of the horn passing a little under the general concave edge formed by the continuity of the upper flap and the fraenum. Ihe prolongation of the lower flap backwards enables it to lay hold 0 J?i?ad posterior fraenum, and renders the fraenum much more efficient. This, at the same time, implies a narrow end to e orifice posteriorly. One or both of the horns of the lower flap may tail to reach up to join the upper flap. In case No. 18 ficr 14, the posterior horns do not meet by £ inch, the posterior fuenum wanting, the competency of the valve doubtful. In case 19, the posterior horns do not meet by £ inch, both the fraena wanting the valve evidently incompetent; in case 16, fig. 13, both horns of the lower flap fail to reach the upper by \ inch, the fraena de^cendT ’ ^ the Valve looks efficienfc- In the latter, the ileum The upper flap (lleo-colic) need not be regarded otherwise than the valvl I' °Tentic f0lds 0f the C0l01h adaptation as part of across toXT m' lnits increased breadth, and in its extending Tha n ri longitudinal band to form a posterior fraenum The ordinary crescentic folds of the colon are known not to pass Tnd,ibut usual]y only between neighbouring lonofi- pas es^'n oTetll16 thdr1hom8 cease‘ SomaSmes a \alvule two occur liam\Wed> S°me bey°nd a band; and when nliTowed wL h iiSame plane> theyare eitber distinct, or become crescentic 'fold® J P088,?6 band> But this 8reatly developed fena extendi the upper flap of the valve and both £ ’,,7 d fr?m the anterior band to the postero-external posterior eXnheSedTrthe baud «* _ fl,e edge, but