Combined pneumo-needle and trocar apparatus
US5320608A · kind A · utility
Inventor
Key dates
| Filing date | Apr 2, 1993 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Apr 2, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/062
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A trocar houses a pneumo-needle, the cutting tip of which emerges eccentrically or concentrically from the tip of the trocar. An obturator, in turn, is housed within said pneumo-needle and is controlled at the distal end of the pneumo-needle by a spring release button. A cannula and reducer housing surround the trocar and are selectively attachable to a needle retainer which controls the penetration of the obturator, pneumo-needle, trocar and cannula into the abdominal cavity. A latch mounted on the rear of the needle retainer permits the pneumo-needle to selectively slide with respect to the needle retainer. Graduations on the needle permit the surgeon to set the depth of penetration of the pneumo-needle. The latch controls the depth of penetration of the pneumo-needle beyond the front face of the needle retainer. The pneumo-needle, in turn, acts as a pilot and controls the depth of penetration of the trocar and cannula. A cannula stop mounted on the needle retainer sets the depth of penetration of the trocar and cannula and permits the cannula to selectively slide with respect to the needle retainer. The apparatus allows the surgeon to employ the full length of the pneumo-needle …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.