puncture


Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.

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 ?
Post dural puncture headache after spinal anaesthesia for caesarean section: a comparison of 25 g Quincke, 27 g Quincke and 27 g Whitacre spinal needles.
The mean attempt for lumbar puncture was 1.1 (55 in 50 patients).
The report firstly introduced the Puncture Therapy basics: definitions, classifications, applications and market overview; product specifications; manufacturing processes; cost structures, raw materials and so on.
Therefore, on the basis of anti-tuberculosis treatment combined with repeated pleural puncture and drainage is usually adopted to treat tuberculous pleurisy in clinics, which has better efficacy than that of anti-tuberculosis drugs alone.16,17 In the past, pleural puncture was often used for drainage treatment in clinic, but the traditional thoracic puncture and drainage need multiple times of puncture.
When Salih took over we couldn't believe the bad luck as the car suffered twin punctures. Good luck, however, ensured that Charlie brought the car home for us to finish with points.'
Post lumbar puncture headache: diagnosis and management.
Generally, the actual puncture point is located at the external positioning point in clinical.
Once the wheel is off, using theHalfords Essentials Puncture Repair Kit, above, which is just [pounds sterling]12, will allow you to get the tyre off the wheel using the included levers.
Unlike percutaneous nephrostomy for patients with hydronephrosis, if percutaneous stone removal is planned, the puncture should be performed in a calyx with possible access to the stone.
TIPS adopts radiation technology and uses special equipment (puncture needle with an bending angle, stent, etc.) to build a shunt between inferior vena cava and the branch of portal vein, so part of the bloodstream in portal vein can flow into inferior vena cava.
The Biogel Puncture Indication System can detect up to 97 percent of punctures and was engineered to provide the optimum level of contrast with Biogel overgloves, indicating punctures faster and more clearly.
In a special closed demonstration circuit representing a typical road we tried out DriveGuard tyres inflated to normal pressure on a Volkswagen Golf and then deflated to simulate loss of air through a puncture.