Complex sentence: Scalpels may be single-use disposable or re-usable, re-usable scalpels can have attached, resharpenable blades or, more commonly, non-attached, replaceable blades.
Split into simpler sentences: Scalpels may be single-use disposable or re-usable. Re-usable scalpels can have attached, resharpenable blades or, more commonly, non-attached, replaceable blades.