The ornamental design for an accessory for a venouscatheter, as shown and described.
FIG. 1 is an environmental illustration of the ornamental design for an accessory for a venous catheter in which the accessory is depicted in side elevation.
FIG. 2 is a perspective view of the ornamental design for an accessory for a venous catheter.
FIG. 3 is a front view of the accessory for a venous catheter of FIG. 2.
FIG. 4 is a back view of the accessory for a venous catheter of FIG. 2.
FIG. 5 is a view from the right of the accessory for a venous catheter of FIG. 2.
FIG. 6 is a view from the left of the accessory for a venous catheter of FIG. 2.
FIG. 7 is a top view of the accessory for a venous catheter of FIG. 2; and,
FIG. 8 is a bottom view of the accessory for a venous catheter of FIG. 2.
The broken lines in FIG. 1 showing a patient's arm and the venous catheter assembly depict environmental matter and form no part of the claimed design. The broken lines in FIGS. 3, 4, and 7 form no part of the claimed design.