A sharply pointed shaft, usually with a three-sided point. A trocar may be used within a cannula, a hollow tube, designed to be inserted into a vein, artery, bone marrow or body cavity. The word trocar is derived from the French "trois" (three) + "carre" (side).
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An instrument for withdrawing fluid from a cavity, or for use in paracentesis; it consists of a metal tube (cannula) into which fits an obturator with a sharp three-cornered tip, which is withdrawn after the instrument has been pushed into the cavity; the name t. is usually applied to the obturator alone, the entire instrument being designated t. and cannula. [Fr. trocart, fr. trois, three, + carre, side (of a sword blade)]
- Hasson t. a blunt t. inserted into the peritoneal cavity after making a small celiotomy; used for insufflation and introduction of a laparoscope.

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tro·car also tro·char 'trō-.kär n a sharp-pointed surgical instrument fitted with a cannula and used esp. to insert the cannula into a body cavity as a drainage outlet

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an instrument used combined with a cannula to draw off fluids from a body cavity (such as the peritoneal cavity). It comprises a metal tube containing a removable shaft with a sharp three-cornered point; the shaft is withdrawn after the trocar has been inserted into the cavity.

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tro·car (troґkahr) [Fr. trois quarts three quarters] a sharp-pointed instrument equipped with a cannula, used to puncture the wall of a body cavity and withdraw fluid.

Medical dictionary. 2011.

Look at other dictionaries:

  • trocar — TROCÁR, trocare, s.n. Instrument chirurgical în formă de tub ascuţit (cu mâner), folosit la efectuarea puncţiilor sau la introducerea în unele cavităţi ale organismului a unor instrumente chirurgicale sau a unor dispozitive optice. – Din fr.… …   Dicționar Român

  • trocar — trócar trócar m. instrum. Aparato puntiagudo formado por una cánula que sirve para efectuar punciones y extraer líquido de su interior. Medical Dictionary. 2011. trocar …   Diccionario médico

  • trocar — Se conjuga como: volcar Infinitivo: Gerundio: Participio: trocar trocando trocado     Indicativo   presente imperfecto pretérito futuro condicional yo tú él, ella, Ud. nosotros vosotros ellos, ellas, Uds. trueco truecas trueca trocamos trocáis… …   Wordreference Spanish Conjugations Dictionary

  • trocar — em troca me isso em miúdos. trocar por trocava a cidade pelo campo …   Dicionario dos verbos portugueses

  • trocar — v. tr. 1. Fazer troca de. 2. Inverter a ordem ou o sentido de. 3. Dar o equivalente de (uma moeda em moedas de outro valor). 4. Substituir; permutar. 5. Alternar. • v. pron. 6. Transformar se. 7. Mudar se; converter se.   • Confrontar: troçar,… …   Dicionário da Língua Portuguesa

  • troçar — v. tr. e intr. Fazer zombaria de; escarnecer; zombar; ridicularizar.   • Confrontar: trocar …   Dicionário da Língua Portuguesa

  • Trocar — Tro car, n. [F. trocart (or trois quarts, i. e., three quarters); trois three (L. tres) + carre the side of a sword blade; so called from its triangular point.] (Surg.) A stylet, usually with a triangular point, used for exploring tissues or for… …   The Collaborative International Dictionary of English

  • Trocar — Trocar, so v.w. Troiscart …   Pierer's Universal-Lexikon

  • trocar — trocar(se) 1. ‘Cambiar [una cosa] por otra’ y ‘transformar(se) en otra cosa’. Verbo irregular: se conjuga como contar (→ apéndice 1, n.º 26), es decir, diptongan las formas cuya raíz es tónica (trueco, truecas, etc.), pero no aquellas cuya raíz… …   Diccionario panhispánico de dudas

  • troçar — de troçava do velhinho …   Dicionario dos verbos portugueses

  • trocar — [trō′kär΄] n. [Fr trocart < trois (< L tres, THREE) + carre, a side, face < carrer, to make square < L quadrare (see QUADRATE): from the shape of the point] a surgical instrument consisting of a sharp stylet enclosed in a tube… …   English World dictionary

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