The ornamental design for a hemostasisvalve, as shown and described.
FIG. 1 is a perspective view of the hemostasis valve, showing my design;
FIG. 2 is a front view of the hemostasis valve;
FIG. 3 is a back view of the hemostasis valve;
FIG. 4 is a left view of the hemostasis valve;
FIG. 5 is a right view of the hemostasis valve;
FIG. 6 is a top view of the hemostasis valve; and,
FIG. 7 is a bottom view of the hemostasis valve.
The broken line showing parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design. The dash dot lines are to show the contours and surface direction. None of the broken lines form any part of the claimed design.