The healing of arteries after ligature in man and animals / by J. Collins Warren.

  • Warren, John Collins, 1842-1927.
Date:
1886
Catalogue details

Licence: Public Domain Mark

Credit: The healing of arteries after ligature in man and animals / by J. Collins Warren. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    consist of fibrous and elastic tissue intermingled with muscular cells. It should be noted that in this case the circular muscular fibres of the ligament are imperfectly developed. LIGAMENTUM ARTERIOSUM. Forty-Two Years. The ligament is short and terminates in the characteristic de- pression in the vessels at each end. Longitudinal sections in a ver- tical plane were made. In the centre between the usual dense bundles of fibrous and elastic tissue is seen a mass of loose cellular tissue, in which a capillary network ramifies. This tissue occupies the axis of the ligament in its entire length, except at the points of its insertion into the great vessels, where the longitudinal fibres are collected into one dense bundle before they spread, to lose them- selves in the coats of those vessels. At the aortic end the upper wall of the aorta overhangs the depression, brow-like, and, from the apex of the depression, an arteriole makes its way to the capillary network in the ligament. (Fig. 29.) The elastic layer of the intima forms a thick wall around the arteriole, but there are few cells in it. Inside of this layer is the connective tissue layer which is slightly thickened here: muscular cells are seen at the edges of the media surrounding, in longitudinal and circular rows, the arteriole, and also in the walls and between the fibres of the ligament. At the pulmonary end there is the customary vessel, which com- municates with the capillary network. The usual condition of the walls of this large vessel prevails in this case. Remarks.—The appearance of the aortic cicatrix is a fair sample of the conditions usually found. In the centre of the ligament the loose areolar tissue seen is found in only a limited number of specimens. It suggests the pre-existence of a thrombus such as was seen in the specimen taken from a child forty-two days old. LIGAMENTUM ARTERIOSUM. Forty-two Years. Longitudinal sections were made m a horizontal plane. The ligament shows as a band of densely packed elastic and fibrous tissue with few cell-elements. In the central axis there are seen, here and there, traces of a capillary vessel. Its fibres divide equally at the aortic end, and lose themselves in the central portions of the coats of that vessel, the intima aortae being continued over the