Sometimes the nasal passage is obstructed by great masses of the necrosed exudate, thus causing extreme difficulty in breathing.
The pus content is usually greenish, stained with blood, and contains strings of fibrous tissue and necrosed matter.
This process is known as coagulation necrosis, and the resulting fibroid mass, containing in its meshes the necrosed and degenerated epithelium and leucocytes, constitutes the diphtheritic or false membrane.
As the result of fracture of the margin of the orbit a part of the injured bone may becomenecrosed (dead), and periostitis and periorbital abscess will follow as a consequence.
When this exudate and the necrosed cellular elements come in contact, the latter furnish a fibrin ferment which transforms the exduate into a fibrinous mass.
When the probe touches necrosed cartilage it will feel like a piece of dry leather or partially softened wood.
Frequently this caseous inflammation results in the formation of one or more ulcers with thickened, slightly reddened borders, surmounted by several layers of this necrosed tissue.
Good union, with free motion of the arm, resulted, after this foreign body and the necrosed bone were taken away.
Grove describes a necrosed inferior turbinated bone, to which was attached a coffee-grain which had been retained in the nostril for twenty years.
Chloroform was administered to excise a portion of the necrosed bone and death ensued.
At this time the head-injury caused him no inconvenience, but it was necessary to amputate the leg and remove the necrosed bones from the cranial wounds; the patient recovered.
When this is incised the necrosed glands may be found lying in the pus, and on bacteriological examination are found to be swarming with streptococci.
The floor of the ulcer is smooth and glazed, or occupied by necrosed tissue, and the discharge is watery and blood-stained, and as a result of putrefactive changes may become offensive.
After an interval of from six to ten days a soft white slough is discharged; this is known as the "core," and consists of the necrosed hair follicle or sebaceous gland.
This often made the closure of the exit wound a very protracted event, the track continuing to discharge a small quantity of bloody serum and fragments of necrosed tissue for many weeks.
The patient then returned to England, when the wound rapidly healed after the removal of some further necrosed fragments of cancellous tissue.
In rare instances auto-infection may result from spontaneous decomposition of the lochia, of bits of decidua, of coagula of blood, of necrosed tissue, or in consequence of severe instrumental labors.
In a similar way, the external ear may be involved, the tympanum disappear, a severe otitis media supervene, and the mastoid cells become filled with pus and detritus of necrosed tissue.
When once this has occurred, recovery can only take place by expulsion of the necrosed parts and consequent ulceration.
In the course of months or years, many such openings may occur through which masses of soft tissue or bone, either carious or necrosed (sequestra), may be discharged.
About the seventh day rupture occurs, pus runs out, and a core of necrosed tissue is found in the centre of a ragged opening.
The area of coagulation necrosis becomes filled with white blood cells, and the dry necrosed part is liquefied by the cocci.
Prompt extraction of loose teeth and of loose fragments of necrosed bone is requisite.
That gangrene has taken place and separation of the invaginated segments is in progress are often known by the very fetid character of the evacuations and by their admixture with blood and shreds of necrosed bowel.
Thence the periosteum and bone become implicated and undergo partial denudation and necrosis, and portions of necrosed bone become detached if the patient survives.
Detachment of the necrosed segments of mucous membrane takes place by gradual exfoliation from periphery to centre.
The bones are sometimes necrosed by the mechanical influence of copious effusion beneath the periosteum, forming nodes of varying sizes and obstructing the supply of blood.
Necrosed portions of bone may require to be removed, but they rarely occur, except in syphilitic cases.
Some authorities, however, consider that the necrosed portion of the brain should be curetted out.
This is a sure sign of extensive disease, the sinus wall often being gangrenous and the bone surrounding it necrosed and discoloured.
Various forms of polypus forceps and bone-pliers may be required, and the necrosed bone has to be raised from its bed by a variety of lever and to-and-fro movements.
When the necrosed bone has been mobilized it may be too large for extraction through the nares; such a mass as the greater part of the body of the sphenoid has sometimes necrosed en bloc.
In the more chronic cases it is thick and greenish; in the acute cases it may contain shreds of necrosed brain tissue or be intermixed with bubbles of gas.
If, however, the abscess be large and irregular in shape, so that the drainage is not free, and especially if it be very septic and contains necrosed brain tissue, irrigation is justifiable if gently carried out.
To these may be added pieces of necrosed cartilage from the larynx, trachea, or bronchi; and calcareous concretions from bronchial glands, which occasionally perforate the walls of the air-passages.
When the necrosed area is superficial, such as the squamous portion of the temporal bone or the cortex of the mastoid process, it should be removed.
Some treat it by stippling in acids underneath the gum, thinking thereby to dissolve away not only the tartar, but the necrosed bone.
Defn: The dissection of dead bodies; also, excision of necrosed bone.
Defn: Affected by necrosis; dead; as, a necrosed bone.
The lumens of the tubules are filled with necrosed cells, and the branches of Henle are found to be similarly obliterated.
A portion of the cellular protoplasm is necrosed and destroyed.
The muscular fibres already become necrosed half an hour after the injection; the diseased tissue becomes permeated with an albuminous mass rich in fibrin, and the blood is extravasated.
The horn of the wall must be removed, and the diseased structures, whether gangrenous keratogenous membrane, necrosed ligament, or carious bone, carefully excised or curetted.
When the necrosedportion of bone is small, and is free from infective properties, it is quite possible that it may, as is the case with small spots of necrosis in softer tissues, be removed by a process of absorption.
Later, thenecrosed portion becomes cast off, and an open wound remains.
When it so happens, either from extensive bruising or from the action of excessive cold, that we have or suspect the condition of sloughing, then the first indication is to aid the live tissues to throw off the necrosed portion.
With a chronic inflammation there is sooner a tendency to the production of fibrous tissue (and thus the firmer attachment of the necrosed portions) rather than an active phagocytosis and the casting-off of a slough.
Whichever may have been the case, we have in the hollow of the heel one or more fistulous openings, or an opening we have made ourselves, leading down to a necrosed portion of the terminal expansion of the perforans.
Under the irritation the latter, as we have said before, cast the necrosedportion away by a process of sloughing.
It goes without saying that, in addition to the necrosed cartilage, all other diseased and necrotic tissues should also be removed.
Directly the necrosed piece is shed, a wound remains which, so far as treatment is concerned, may be regarded exactly as that left by the formation of pus.
Even when the necrosed portion is freely movable, and only adherent by its base, it should not be forcibly removed, but left to the slower but more effectual action of the tissue reactions.
Portions of the os pedis, more especially of its wings, and therefore usually occurring in conjunction with necrosed cartilage, become carious in quittor.
This means cutting down upon the diseased cartilage, and either removing the necrosed portion, or excising the cartilage in its entirety.
When the Complication ofNecrosed Tendon or Ligament exists.
Forceps for extraction of splinter or necrosed fragments of the maxillary bones (Abulcasis).
For the extraction of a splinter or necrosed fragment of the maxillary bone, the same instruments must be used which serve for the extraction of dental roots; but also a pair of forceps may be used (Figs.
