在ざい院いん日にっ数すう

noun

length of hospital stay; number of days in hospital

Used in medical and administrative contexts to refer to the total number of days a patient stays in a hospital.

• この手しゅ術じゅつの平へい均きん在ざい院いん日にっ数すうは約やく一いっ週しゅう間かんです。

  The average length of hospital stay for this surgery is about one week.

• 在ざい院いん日にっ数すうが長なが引びくと、医い療りょう費ひが増ぞう加かします。

  If the number of days spent in hospital is prolonged, medical costs increase.