Medicare spends an average of $16,500 to $33,000 per patient for the surgery, hospitalization, and recovery from hip and knee replacements, but depending on the provider and where the treatment takes place, the quality and cost of these surgeries can vary greatly.edicare spends an average of $16,500 to $33,000 per patient for the surgery, hospitalization, and recovery from hip and knee replacements, but depending on the provider and where the treatment takes place, the quality and cost of these surgeries can vary greatly.
Ledge means a piece of masonry or wood or stone that juts out into an open space. A mountain climber might use a ledge of rock to support his body from falling, for example.
The term belay also means the place where the belayer is anchored; this is typically a ledge, but may be a hanging belay, where the belayer is suspended from protection in the rock. 1 How belaying works.