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Updated: May 8, 2025
In small arteries these clots extend as far as the nearest collateral branch, but in the larger trunks their length varies. The permanent occlusion of those portions of the vessel occupied by clot is brought about by the formation of granulation tissue, and its replacement by cicatricial tissue, so that the occluded segment of the vessel is represented by a fibrous cord.
Bryce records a case of anuria of seventeen days' standing. Butler speaks of an individual with a single kidney who suffered suppression of urine for thirteen days, caused by occlusion of the ureter by an inspissated thrombus. Dubuc observed a case of anuria which continued for seventeen days before the fatal issue. Fontaine reports a case of suppression of urine for twenty-five days.
The pulsation in the vessels beyond the seat of rupture is arrested for a time at least owing to the occlusion of the vessel, and the limb becomes cold and powerless. The pulsation seldom returns within five or six weeks of the injury, if indeed it is not permanently arrested, but, as a rule, a collateral circulation is rapidly established, sufficient to nourish the parts beyond.
Partial deficiency is described by Petit Severinus, and others. There may be imperforation or congenital occlusion of some portion of the urethra, causing enormous accumulation of urine in the bladder, but fortunately there is generally in such cases some anomalous opening of the urethra giving vent to the excretions. Tulpius mentions a case of deficient urethra.
Her face had taken upon itself that appalling and exasperating calmness of very good people who never get angry, but drive others to frenzy by the simple occlusion of an adamantine veil between their own feelings and their opponents'. "I'll tell you all about it after I've put up the horse," he said hurriedly, glad to escape until the veil was lifted again. "I suppose the hired man is out."
When adhesions have formed between the iris and the structures in relation to it, the pupil dilates irregularly under atropin. Although complete recovery is to be expected under early and energetic treatment, if neglected, iritis may result in occlusion of the pupil and permanent impairment or loss of sight.
If, however, the blood does not return for four or more seconds, it is a sign that the capillary circulation is obstructed by colloid uric acid occlusion.
If the pulsation returns within a week of the injury, the presumption is that the occlusion was due to pressure from without for example, by hæmorrhage into the sheath or the pressure of a fragment of bone. Complete Subcutaneous Rupture. When the rupture is complete, all the coats of the vessel are torn and the blood escapes into the surrounding tissues.
Lombard mentions an observation of complete occlusion of the vagina in a woman, the mother of 4 living children and pregnant for the fifth time. Thus, almost incredible to relate, it is possible for a woman to become a mother of a living child and yet preserve all the vaginal evidences of virginity.
Aubery, Charrier Poelman, and others speak of congenital division of the intestinal canal. Congenital occlusion is quite frequently reported. Dilatation of the colon frequently occurs as a transient affection, and by its action in pushing up the diaphragm may so seriously interfere with the action of the heart and lungs as to occasionally cause heart-failure.
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