Flat-inclined tip needle

Details Flat-inclined tip needle Flat-inclined tip needle

1986-11-07

1988-01-26

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604158, 604164, 604170, A61M 3100

Patent

active

047215062

ABSTRACT:
An epidural needle and method of use are disclosed involving a needle shaft having a first end and a second end with an axial channel extending therebetween. The first end of the needle shaft includes an inclined surface and a rounded and blunted point. The second end of the needle includes an attachment means. A solid rod having an inclined surface and a rounded and blunted point is receivable into the axial channel of the needle shaft. When the solid rod is positioned within the axial channel of the needle shaft, the point of the solid rod and the needle together form a unitary tip having an inclined portion and a blunted portion. The blunted portion forms an end face disposed at an angle of about 80 to 100 degrees relative a longitudinal axis of the needle. The unitary tip avoids nicking, piercing, severing, or perforating the veins, arteries, nerves and dura of the patient in traversing the spinal ligaments and in entering a space proximate the dura matter of a spinal cord of a patient to provide liquid communication with the space when the solid rod is withdrawn from the axial channel of the needle.

REFERENCES:
patent: 1527291 (1925-02-01), Zorraquin
patent: 2922420 (1960-01-01), Cheng
patent: 4645491 (1987-02-01), Evans
patent: 4650472 (1987-03-01), Bates

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