Device for percutaneous paracentesis injection drainage and catheterisation

Abstract

Abstract 1500419 Needle and trocar assembly C A H DE GAZTANONDO 27 Nov 1975 [14 Dec 1974] 48851/75 Heading A5R In a needle trocar assembly there is provided a needle 1 comprising a connecting portion 6 for attachment to a syringe, a central body portion (3) extending from the connecting portion and having a reference mark 11 thereon, and a leading portion 4 of smaller diameter than the central portion and terminating in a sharp cutting bevel 5, and a trocar 2 comprising a connecting portion 9 for attachment to connecting portion 6 of the needle, and a body portion 10 having a graduated scale thereon, the body portion 10 terminating in a bevel 7 having an angle not so sharp as that of bevel 5. When bevels 5 and 7 are in alignment this is indicated by reference mark 11 being at the connecting portion end of the trocar, the graduated scale indicating how far the trocar is in the body. The bevel 7 of the trocar has an internal blunt edge (8), Fig. 5 (not shown), and an external sharp edge (8a) to minimise the risk of tissue damage. The needle and trocar may be formed of stainless steel. The connecting portions 6 and 9 may be threaded and have lugs or wings to facilitate their handling.

Inventors

No inventors recorded.

Bibliographic Details