I claim the ornamental design for a drip chamber and spike assembly for medical lines, as shown and described.
FIG. 1 shows a perspective view from above of a drip chamber and spike assembly for medical lines showing the new design;
FIG. 2 shows a front side view thereof;
FIG. 3 shows a rear side view thereof;
FIG. 4 shows a right lateral view thereof;
FIG. 5 shows a left lateral view thereof;
FIG. 6 shows a top end view thereof; and,
FIG. 7 shows a bottom end view thereof.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.