The present invention is directed toward an improved spinal needle.
A needle hub is disposed about a proximate end of a hollow needle.
The needle hub side port indicators provide visual and tactual verification
by a user of the orientation of the side port on the needle. The
needle hub also includes a window with a magnified view. The invention
provides a stylet cap disposed about a proximate end of a stylet
that freely slides inside the hollow needle and needle hub. The
stylet cap forms a pressure fit with the needle hub, and can be
engaged in the pressure fit from any axial orientation.
A double-hole pencil-point (DHPP) spinal needle is composed of
a closed end blunt ogival or pencil point tip and two circular coaxial
holes in close proximity to the tip. Anesthetic solution may be
injected through the coaxial holes in a direction parallel to the
long axis of the spinal fluid column which allows an even anesthetic
distribution with a low dosage required. The spinal needle of the
present invention allows anesthetic solution to be injected even
when one of the holes is obstructed by a tissue fragment and rapid
reflux of cerebral spinal fluid at twice the rate of single hole
pencil point spinal needles.
A spinal needle for performing medical treatment is inserted into
the vertebral pulp, a laser probe is inserted into the spinal needle,
and then laser rays are radiated onto the vertebral pulp. An air-escape
tube is unitarily provided parallel to the spinal needle or a flow-passage
connected with the interior of the spinal needle is provided in
the vicinity of the handle portion of the spinal needle.
The present invention discloses a method for producing a multi-lumen
needle suitable for administrating spinal anesthesia. The method
will provide a needle that will allow the simultaneous administration
of spinal and epidural anesthetic from a single site. A preferred
needle made by this method can optionally be made with a stock configuration
which has means for holding a catheter during the insertion of a
spinal needle and is configured so as to provide gripping sites
to assist in positioning the needle. The preferred needle of the
present invention has a lumen which can serve as a spinal introducer.
The introducer lumen sheaths the spinal needle until the spinal
needle is in the epidural space. This assures that the spinal needle
will not be bent or fractured in use by impingement with bone or