How to use Perforation in a sentence
A large number of mammals possess a perforation, or foramen, on the inner side of the lower end of the humerus, and also a projection on the shaft of the femur known as the third trochanter.
Here the merit of nickel steel is not so much that it resists perforation, as that it does not crack even when deeply penetrated by a projectile.
The vertebrae of the neck unite by nearly flat surfaces, the humerus has lost the foramen, or perforation, at the lower end, and the third trochanter to the femur may also be wanting.
Thecurrent being alternately transmitted and shut off, as a hole passes on and off the aperture of the tube or bellows, causes a vibratory motion of the air, whose frequency depends on the number of times per second that a perforation passes the mouth of the tube.
The hind-limbs are elongated, with four toes, of which the metatarsals are separate; the tibia and fibula are welded in old age; the calcaneum and astragalus of the tarsus are elongated; and there is a perforation on the inner side of the lower end of the humerus (see Jumping-Hare).Advertisement
The cards are purchased together and have a perforation down the middle, allowing the parents to have one card and the student to have the other.
Black patent leather still was the only thing to wear as part of evening attire, but the wingtip, a pointed shoe with perforation over the toe, was being increasingly seen, adding some zing to a man's look.
Poisoning symptoms range from slight bleeding to bowel perforation to liver and kidney damage.
Displacement of these magnets has been reported to cause bleeding and perforation of the nasal septum, while accidental swallowing of these magnets may require emergency surgery.
Vasculitic ulcers in the digestive tract may lead to perforation of the intestines, which is a medical emergency.Advertisement
In a very few cases the child may die from complications related to myocarditis or from bowel perforation or lung disease caused by vasculitic ulcers.
A perforated eardrum (tympanum perforation) is an opening or rupture in the eardrum (tympanic membrane), the thin membrane that separates the outer ear canal from the middle ear.
When perforation occurs, bacteria can pass more easily into the middle ear, potentially causing ear infections.
Perforation is most commonly caused by either chronic or acute infection of the middle ear, usually related to infection of the nose and throat (nasopharynx).
The location of the perforation also affects the degree of hearing loss.Advertisement
Eardrum perforation caused by a loud noise may result in disturbing ear noise (tinnitus) as well as a temporary hearing loss.
Middle ear infection (otitis media) is the most common cause of perforation of the eardrum.
Tympanostomy tube insertion can also cause perforation.
Early treatment of ear infection may help avoid perforation or hearing loss.
This examination makes possible the diagnosis of eardrum perforation by allowing the doctor to see an opening in the eardrum or damage to bones in the middle ear.Advertisement
Three or four patches may be needed before the perforation closes completely.
Any hearing loss or ear noise that accompanies the perforation is usually temporary.
Kidney failure is a serious complication that can occur as a result of severe dehydration and/or systemic infection from perforation of the bowel.
Medical complications and health threats, including high lead levels, bowel perforation or intestinal obstruction, will require additional medical management, beyond addressing the underlying issue of pica.
In some cases, a surgical perforation to drain pus from the middle ear may be performed.Advertisement
If the appendix is not removed, bacteria and inflammation within the appendix rapidly expand, the wall of the appendix stretches, and perforation can occur.
Perforation is more common in younger children.
Perforation can occur as soon as 48 to 72 hours after symptoms first begin and can become life-threatening.
When perforation occurs, abdominal pain becomes more intense and involves the whole abdominal area, and fever may be very high.
A doctor should be called immediately if appendicitis is suspected so that children can receive prompt medical treatment before perforation occurs.
Abdominal pain is a common complaint in children, and making a timely diagnosis of appendicitis before perforation is often difficult.
In infants, diagnosis is often not possible and not made until after perforation.
If the appendix is removed before perforation occurs, the hospital stay is usually two to three days.
Some women may also experience heavy bleeding, blood clots, perforation of the uterus, or damage to the cervix.
Although this bleeding after Mirena IUD removal seems to be a common occurrence, you need to make sure that no other complications, like uterine perforation, have taken place.
At eight days old she suffered a bowel perforation that inhibited her ability to gain weight.
The rectal balloon catheter used for barium enema can very rarely cause perforation.
Therapy should be permanently discontinued in patients who develop gastrointestinal perforation.
Jejunal diverticulosis occasionally presents as an emergency with perforation, obstruction or gastrointestinal hemorrhage.
If perforation is suspected, then a water soluble contrast enema should be carried for confirmation.
However, if a major perforation was detected, then the surgeon would perform an abdominal incision to repair the uterus.
The short form tear-off feature automatically feeds the perforation of continuous paper to the tear-off position of the top cover when printing is complete.
This may cause a perforation of the gut lining or an obstruction.
On the 25mm diameter size there is an option to have a center micro perforation across the middle of the label.
Ingestion of corrosive substances can result in severe gastrointestinal injury including perforation.
The SHO admitted at interview that he did not examine Mrs Y for signs of surgical emphysema a sign of oesophageal perforation.
Despite her intestinal perforation, she remained reasonably well, haemodynamically stable, with a soft distended abdomen.
Two cases of small bowel perforation due to metastasizing lung cancer are reported.
Post mortem examination revealed cause of death to be bowel perforation by a sharp sawn section of ox vertebra.
It role following surgery for ulcer perforation is unclear.
Delayed spontaneous bladder perforation - no particular intestinal segment is more predisposed.
Symptoms of advanced disease include intestinal obstruction, perforation and resulting peritonitis.
In these cases, endoscopic removal can carry an unacceptably high risk of bleeding or perforation.
In case of unscarred pylorus the perforation can be excised followed by a pyloroplasty; truncal vagotomy is then added after thorough peritoneal lavage.
In more recent instruments at the observatories of the Cape of Good Hope and Paris the motion is transmitted from a separately mounted cone and clock by a light rod passing through a perforation in the pivot of the transit instrument and thence through bevel-wheels in the cube of the axis to a second rod leading to the eyepiece.
Others he treated very superficially, and in none of his experiments apparently did he attend to the diminution of efflux arising from the contraction of the liquid vein, when the orifice is merely a perforation in a thin plate; but he appears to have been the first who attempted to ascribe the discrepancy between theory and experiment to the retardation of the water's velocity through friction.
The migration of the Cestode-larvae through the walls of the intestine into the blood of their host is the cause of grave disturbances, due largely to the perforation of the tissues, inflammation of the vessels and peritoneum, and other effects of these immigrants.
The perforation of the paper when done by hand is usually performed by means of small mallets, but at the central telegraph office in London, and at other large offices, the keys are only used for opening air-valves, the actual punching being done by pneumatic pressure.
The end wall is usually very thin, and the protoplasm on artificial contraction commonly sticks to it just as in a sieve-tube, though no perforation of the wall has been found.
Submucous haemorrhages are usually present, but perforation is rare.
The effects of the ingestion of large quantities may be so rapid that death may take place in a couple of hours, owing to collapse, consequent on perforation of the walls of the oesophagus or stomach, or from asphyxia due to swelling of the glottis consequent on some of the acid having entered the larynx.