Dialysis machine and Medical instrument

Dialysis machine noun - A medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes.

Medical instrument and dialysis machine are semantically related. In some cases you can use "Medical instrument" instead a noun phrase "Dialysis machine".

Medical instrument noun - Instrument used in the practice of medicine.

Dialysis machine and medical instrument are semantically related. Sometimes you can replace phrase "Dialysis machine" with "Medical instrument", this phrases are similar.