Surgery – Truss – Pad
Patent
1975-06-05
1977-03-22
Trapp, Lawrence W.
Surgery
Truss
Pad
A61B 1734
Patent
active
040130800
ABSTRACT:
A cannula has a hub formed at its proximal end with a terminal peripheral flange and also has a radial vane having an apertured proximal extension. A stylet fits into the cannula and has a hub with a skirt to receive the cannula hub flange and also having a hook received in the vane extension aperture to lock the two hubs together and insure protrusion of the stylet point from the distal end of the cannula. A barb on the hook latches the hubs together but is also used to disengage the hubs. An obturator has a hub and hook similar to the stylet. A disc-puncturing needle has a hub with an imperforate vane which is oriented with a bevel at the distal end of the needle and also provides leverage to connect the needle hub tightly to a Leur-lok or other fitting of a syringe. A tool comprises two leaves which can be pinched together to bend the distal of the needle to desired shape, the leaves being formed with complex curves so that a choice of bends is available. The apparatus is preferably used for injection into the nucleus pulposus of a lumbar disc of contrast fluids, probes and drugs.
REFERENCES:
patent: 1248492 (1917-12-01), Hill
patent: 2794435 (1957-06-01), Stevens
patent: 3608539 (1971-09-01), Miller
patent: 3628524 (1971-12-01), Jamshidi
patent: 3630192 (1971-12-01), Jamshidi
patent: 3789852 (1974-02-01), Kim et al.
Caplan Julian
Trapp Lawrence W.
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