single-hand band-aid / Medical products

Band-aid has being a normal basic medical thing in our dairy life,
everyone had ever used it before.
If there is a situation which makes you can only fix your wound by one hand,

For instance, you hurt another hand on finger or for the disabled.
You may face the following problem:
can not match the small piece cutton to the wound,making the band-aid stick to itself
or you are just try to tear the used band-aid and found it's too stick to remove.