例句與造句

1. When CSF cannot be obtained from the lumbar space ( and when its analysis is considered critical to treatment ), a cisternal tap may be required.
2. The cisternal tap may be used in myelography when the upper margin of a spinal block needs to be defined, however, magnetic resonance imaging ( MRI ), has become the procedure of choice for defining the upper and lower limits of spinal cord or spinal cord compressing lesions.
3. It's difficult to find cisternal tap in a sentence. 用cisternal tap造句挺難的