Application member and medical instrument

A medical instrument comprising:

• a medical device;
• and
• a sheet-shaped application member comprising:
• a first region, a second region extending around the first region, and a third region in a portion of the first region, wherein:
• the first region comprises a first region attachment surface to which the medical device is attached, and a first region application surface opposite the first region attachment surface and adapted to be applied to a subject,
• the second region comprises a second region application surface adapted to be applied to the subject,
• the third region comprises a third region application surface adapted to be applied to the subject,
• the first region application surface and the second region application surface are adapted such that, when the application member is applied to the subject, adhesion at the second region application surface is stronger than adhesion at the first region application surface, and
• the third region is adapted such that, when the application member is applied to the subject, adhesion at the third region application surface is stronger than adhesion at an area surrounding the third region application surface, and
• an application member tear portion adapted to allow for tearing of a portion within the first region or for tearing the first region from the second region.

A sheet-shaped application member comprising:

• a first region, and a second region extending around the first region, wherein:
• the first region comprises a first region attachment surface to which a medical device is attachable, and a first region application surface opposite the first region attachment surface and adapted to be applied to a subject,
• the second region comprises a second region application surface adapted to be applied to the subject, and
• the first region application surface and the second region application surface are adapted such that, when the application member is applied to the subject, adhesion at the second region application surface is stronger than adhesion at the first region application surface;
• and
• an application member tear portion adapted to allow for tearing of a portion within the first region or for tearing the first region from the second region,
• wherein the first region is substantially polygonal and comprises a protrusion protruding toward the second region on at least one side of the first region.