起き立りつ性せい

noun which may take the genitive case particle 'no'

orthostatic

Medical term used attributively to describe conditions or responses related to standing upright, such as 起立性低血圧 (orthostatic hypotension).

• 起き立りつ性せい低てい血けつ圧あつは、立たち上あがったときに血けつ圧あつが下さがる状じょう態たいです。