Combined pneumo-needle and trocar apparatus

Details Combined pneumo-needle and trocar apparatus Combined pneumo-needle and trocar apparatus

1993-01-29

1994-05-17

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604264, 604167, A61M 500, A61M 2500

Patent

active

053123514

ABSTRACT:
A trocar houses a pneumo-needle, the cutting tip of which emerges eccentrically from the tip of said 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 latch attached to the trocar permits the pneumo-needle to selectively slide with respect to the trocar to gauge and set the depth of penetration of the pneumo-needle. A cannula and reducer surround the trocar and are attached to a stabilizer housing which permits the cannula to selectively slide with respect to the stabilizer to gauge and set depth of cannula penetration. One or more duckbill seals located within the cannula housing prevent leakage of insufflation gases into the interior of the reducer housing. A stabilizer lock attached to a stabilizer housing connected to the cannula and reducer prevents the apparatus from being prematurely withdrawn from a puncture wound. The apparatus minimizes the number of puncture wounds necessary to inflate an internal region and, because of the eccentricity of the pneumo-needle with respect to the tip of the trocar, minimizes the amount of force necessary to introduce the instrument into the patient's abdominal cavity.

REFERENCES:
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patent: 5197955 (1993-03-01), Stephens et al.
patent: 5207649 (1993-05-01), Aruny
patent: 5217441 (1993-06-01), Shichman

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