FIG. 1 is a perspective view of my new spinal cannula design with hollow needle, mandrel and holding grip;

FIG. 2 is a perspective view of the design of FIG. 1 without the hollow needle, mandrel and holding grip;

FIG. 3 is a front view of the design of FIG. 1 showing the mandrel and holding grip in a retracted position;

FIG. 4 is a view similar to FIG. 3 showing the mandrel and holding grip in a non-retracted position;

FIG. 5 is a front view of the spinal cannula without mandrel, hollow needle and holding grip;

FIG. 6 is a right side view of the spinal cannula without mandrel, hollow needle and holding grip, the left side view being identical;

FIG. 7 is a bottom view of the spinal cannula without hollow needle, mandrel and holding grip;

FIG. 8 is a bottom view of the spinal cannula without hollow needle, mandrel and holding grip;

FIG. 9 is a top view of the spinal cannula without hollow needle, mandrel and holding grip;

FIG. 10 is a bottom view of the spinal cannula with hollow needle, mandrel and holding grip; and,

FIG. 11 is a rear end view of the spinal cannula with hollow needle, mandrel and holding grip.