What does preoperative mean?
Preoperative describes anything connected with the period before an operation. The term is especially common in hospitals and clinical settings, where it refers to the assessment of a patient's health, necessary tests, fasting or medication instructions, preparation of the surgical site, and other arrangements made before an operation. A preoperative assessment may review a patient's medical history, allergies, laboratory results, and fitness for surgery. The adjective is usually attached to nouns such as assessment, care, preparation, and testing. It should not be confused with postoperative, which refers to the period following surgery, or intraoperative, which describes events occurring during an operation. Although the word is technical, its meaning is straightforward: it identifies the stage that comes before surgery and the preparations connected with that stage.
adjectiveRelating to the period before a surgical or medical operation, especially the assessment, preparation, testing, or instructions given to a patient beforehand.
- Relating to or occurring before a surgical or medical operation.
"The nurse explained the preoperative instructions before the patient was taken to the operating room."
"Preoperative blood tests helped the medical team plan the operation."
"The hospital provides detailed preoperative guidance to every patient."
Preoperative is the medical word for everything that happens before surgery, from fasting instructions and medical tests to the final assessment.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does preoperative come from?
Preoperative was formed in English by combining the Latin-derived prefix pre-, meaning "before," with operative, meaning "pertaining to an operation." Operative ultimately comes from Latin operativus, associated with opus, meaning "work" or "task." The modern medical sense developed as medicine increasingly distinguished the preparation, performance, and aftermath of surgical operations.
Related word forms
How preoperative is actually used
This is chiefly a formal medical adjective. It is commonly paired with words such as assessment, care, preparation, and testing; in informal clinical speech, it is often shortened to "pre-op."
Easily confused with preoperative
Preoperative means before an operation, whereas postoperative means after it.