puncture

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Related to punctured: Punctured eardrum, Punctured lung

puncture

1. a perforation and loss of pressure in a pneumatic tyre, made by sharp stones, glass, etc.
2. the act of puncturing or perforating

Puncture

 

a piercing of the wall of any cavity, vessel, hollow or parenchymatous organ, tumor, or infiltrate for purposes of treatment or diagnosis. Exploratory punctures are used to help accurately diagnose diseases either through analysis of the contents of a cavity—the pleural cavity, for example—and subsequent cytological, biochemical, and bacteriological examination or through microscopic, ultramicroscopic, cytochemical, and chromosomal study of cells obtained from pathologically altered organs. It is also used for measuring the pressure in the cavities of the heart, large blood vessels, and the cerebrospinal canal and for introducing into a cavity contrast materials or air (radiodiagnostics). Therapeutic punctures are used to extract pus, blood, air, or fluid from a cavity, wash the cavity, and introduce medicinal substances. Often both types of punctures coincide.

There are a number of common punctures. Veins are punctured in order to obtain blood for analysis and for bloodletting, injection of medication, or transfusion of blood. In the case of exudative pleuritis, the pleural cavity is punctured in order to remove air from the cavity and induce artificial pneumothorax. The abdominal cavity is punctured if ascites is present, and joints are punctured for therapeutic and exploratory purposes. Puncture of the cerebrospinal canal is performed for analysis of the cerebrospinal fluid or injection of medications or radiopa-que substances. The urinary bladder is punctured when there is urinary retention and it is impossible to introduce a catheter. Puncture is done with a syringe and a special needle or trocar, according to all the principles of asepsis and anesthesia.

REFERENCE

Diagnosticheskaia i lerapevlicheskaia lekhnika. Edited by V. S. Maiata. Moscow, 1969.

A. N. SMIRNOV

puncture

[′pəŋk·chər]
(electricity)
Disruptive discharge through insulation involving a sudden and large increase in current through the insulation due to complete failure under electrostatic stress.
(science and technology)
To pierce or indent.
References in periodicals archive ?
Mesoscutum contiguously and strongly punctured as on face except central disc strongly imbricate with faint (nearly indistinct anteriorly) punctures separated by a puncture width; scutellum contiguously punctured, punctures slighter smaller and shallower than those on mesoscutum; metanotum contiguously punctured, punctures considerably smaller and shallower than those on scutellum, posterior third imbricate.
Meeks III of the University of Massachusetts and Harold Rosenberg of the Universite Denis Diderot in Paris proved that a complete, embedded minimal surface that was topologically a punctured sphere with no handles had to be either the basic helicoid or the plane.
Most of the vehicles had more than one tyre punctured.
If anyone has had a tyre punctured by one of these small pins and they have proof of repair they should contact us.
but punctured a tire, causing delays to nine departing flights and 20 arriving flights, they said.
Under no circumstances should you completely unroof a blister, and non-painful blisters should not be punctured.
The perineal skin was prepared with povidone-iodine solution, and using a 23-gauge needle on a 3 mL syringe, the balloon was punctured at the base of the scrotum.
The tubes are thicker where it counts, in the "flat zone," and are filled with Slime sealant to instantly block leakage in punctured spots.
The Peugeot UK pair in their 207 S2000 were leading the rally, the fourth round of the IRC Series, when they punctured on Stage 8, losing one and 3/4 minutes.
Unless cars are fitted with tyre deflator detectors it is possible that a driver could be unaware that a tyre is punctured and potentially lifethreatening.
With standard tyres, the driver becomes aware immediately when a tyre is punctured and will inevitably stop the vehicle and change the tyre.