Cov hlab ntaws cov hnoos qis kuj raug hu ua venous trocars. Cov tub ntxhais kawm muaj xws li catheter catheter / cannula uas tau muab tso rau hauv cov hlab ntsha, thiab cov kav hlau tsis muaj cov kav hlau cob qhia. Thaum siv, catheter thiab rab koob tub ntxhais hluas raug rau hauv cov hlab ntsha. Thaum tus catheter ua rau hauv cov hlab ntsha, qhov rab koob tub ntxhais raug rho tawm, thiab tsuas yog tus mos catheter muab tso rau hauv cov hlab ntsha rau txoj kev kho mob.
catheter koob yog muab faib ua hom qhib thiab kaw, qhib hom yog muab faib rau hom dab tsi thiab hom kev nyab xeeb (hom tshuaj tiv thaiv), thiab hom kaw raug muab faib ua hom thiab hom kev nyab xeeb (kev siv tshuaj tiv thaiv lub qhov txhab)
