Is it permissible for a sick person who cannot perform ablution by himself to combine prayers, given the impossibility of finding someone to help him due to the helper's preoccupation or illness?

A sick person who is harmed or finds it difficult to pray each obligatory prayer at its prescribed time is permitted to combine two prayers, either by advancing or delaying them. It is preferable for the questioner to avoid the difference of opinion by performing a "pictorial" (apparent) combination of prayers, meaning she prays the first prayer at the end of its time and the second prayer at the beginning of its time. However, if this is difficult, she may act according to the actual (real) combination.