Fundamentals of Nursing · Perioperative Nursing Care
Preoperative Phase
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In 30 seconds
The preoperative phase begins the moment surgery is decided and ends when the person is transferred to the operating room table. It may span weeks (preadmission testing and teaching at clinic visits) or minutes (emergency surgery rolling straight to the OR).
The work of this phase has four purposes: optimize (get the person as ready as possible), assess (gather the history, medications, allergies, and baseline data the team will rely on), educate (teach what to expect and how to prevent complications), and verify (confirm identity, procedure, site, consent, and readiness). Almost every serious surgical safety failure traces back to a breakdown in one of these four jobs.
⚠️ Educational content only. This guide explains concepts, not protocols. Fasting (NPO) rules, required testing, and specific checklists vary by facility, procedure, and anesthesia provider; consent rules vary by jurisdiction. Verify with institutional policy and current evidence.
Why this matters
- Preparation prevents complications. Preoperative teaching of deep breathing, coughing, and incentive spirometry reduces postoperative lung complications; early mobility teaching reduces clot risk.
- The legal foundation of surgery is consent. A procedure without valid Informed consent Voluntary agreement to a procedure after understanding its nature, risks, benefits, and alternatives Full entry → is a legal and ethical violation, and nurses must understand what is — and is not — their role in the consent process.
- Safety verification saves lives. Wrong-site, wrong-procedure, and wrong-patient surgery are catastrophic and preventable through systematic verification.
The college version
Core Concepts
Boundaries and responsibilities of the phase
Preparation happens in two places: the preadmission/clinic setting (history, testing, teaching, consent discussion) and the day-of-surgery unit (final verification and handoff). In emergencies, this compresses to minutes, and the nurse prioritizes stabilization and protecting the person's rights as best the situation allows. The nurse's scope includes assessment, teaching, verification, and documentation — not obtaining consent or judging understanding (covered below).
Preoperative assessment
The preoperative assessment gathers what the whole team will use:
- Health history: past medical and surgical history; current illnesses; allergies (drug, latex, food); all current medications including OTC drugs, herbals, and supplements (some affect bleeding or anesthesia — the provider decides what to hold); tobacco, alcohol, and substance use; mobility and sensory limitations; prosthetics and implants.
- Physical assessment: baseline vital signs, weight, and a systems review relevant to the procedure.
- NPO (nothing by mouth) Fasting before anesthesia Full entry → status: Fasting reduces the risk of aspirating stomach contents while unconscious. The rules (what is allowed, and for how long) are set by the anesthesia provider and facility policy — there is no single universal fasting schedule. The nurse confirms and documents exactly what and when the person last ate or drank, and reports violations.
- Diagnostic testing: Tests (blood work, imaging, ECG, and others) are ordered selectively based on the procedure, the person's health, and facility standards — there is no one-size-fits-all panel.
Informed consent
Informed consent is the process by which a capable person voluntarily agrees to a procedure after understanding its nature, benefits, risks, and alternatives:
- The provider performing the procedure obtains consent — the surgeon explains the procedure, risks, benefits, and alternatives; the nurse neither obtains consent nor decides capacity.
- The nurse's role is to verify a signed consent is on the chart, witness the signature, reinforce teaching, and flag any indication the person does not understand or is pressured.
- Consent must be given before any sedating medication; a signature obtained after sedation is not valid.
Preoperative teaching
Teaching before surgery changes outcomes:
- Deep breathing and coughing to expand the lungs and clear secretions.
- Incentive spirometry — how to use the device and how often (per the plan).
- Splinting — holding a pillow or hands firmly over the incision when coughing to reduce pain.
- Leg exercises (ankle pumps, foot circles) and early ambulation to support circulation and reduce clot risk.
- What to expect: IV lines, drains, pain management options, the PACU experience, and typical recovery milestones.
Teaching is demonstration and return demonstration ("show me how you would use this"), adapted to language and literacy, with an interpreter when needed. Surgery is stressful; honest, step-by-step explanation reduces anxiety too.
Day-of-surgery preparation and safety verification
On the day of surgery, preparation and verification converge:
- Verify identity (name, date of birth, ID band) and the planned procedure and site — including surgical site marking when the procedure involves a side or level, done per facility policy, ideally with the person participating.
- Confirm the checklist: NPO status, allergies, signed consent, medication reconciliation, removal of jewelry/dentures/contacts/prosthetics as required, valuables secured, ordered pre-op medications given, IV access and baseline assessment completed.
- Handoff to the OR team: a structured report (identity, procedure/site, history, allergies, meds, NPO status, baseline findings, concerns) ensures nothing is lost in transfer.
- The Time out A final verbal confirmation of correct patient, procedure, and site immediately before incision Full entry → — a final, active verbal confirmation of correct patient, procedure, and site — occurs in the OR immediately before incision; the pre-op nurse prepares for it by completing the verification chain.
Documentation ties it together: assessments, teaching, consent verification, checklist completion, and handoff are all recorded per facility policy.
Common Confusions
| Do Not Confuse | With | Difference |
|---|---|---|
| The nurse obtaining consent | The nurse verifying consent | The provider performing the procedure obtains informed consent; the nurse verifies it is signed, witnessed, and understood, and reports concerns |
| A signed consent form | A person who understands | Signature is not proof of understanding; the nurse checks comprehension and flags doubts to the provider |
| The time out | A preoperative-phase task | The time out happens in the OR immediately before incision; the pre-op nurse completes the verification chain that makes it reliable |
Eli explains
The same idea, in plain words
Explain it like I’m 10
Before a big test you pack your pencil, check the time, and confirm the room. Before surgery, the care team does the same — but with higher stakes: they check who you are, which body part is being operated on, what you last ate, and whether you understand what will happen, then teach you breathing and leg exercises that help you heal faster.
Worked example
Mrs. Alvarez is scheduled for a same-day laparoscopic gallbladder removal. At the preadmission visit, the nurse takes her history: high blood pressure, a daily blood-pressure medication, and a penicillin allergy. The surgeon explains the procedure, risks, and alternatives; Mrs. Alvarez signs; the nurse verifies the signature, confirms she can repeat the plan back, and witnesses the form.
On surgery day, the nurse runs the checklist. Mrs. Alvarez confirms she has had nothing to eat or drink since the anesthesia provider's specified time — except, she adds, a glass of water two hours ago. The nurse documents the intake and notifies the anesthesia provider, who decides how to proceed. The nurse confirms her ID band, allergy band, and consent, verifies the site marking, and secures her valuables. Then Mrs. Alvarez practices deep breathing, splinting, the incentive spirometer, and ankle-pump exercises.
At handoff, the nurse gives a structured report: identity verified, procedure and site confirmed, allergies, medications, NPO status including the water, consent, baseline vital signs, and teaching completed. When the team calls the time out in the OR, every earlier verification is what makes that final "right patient, right procedure, right site" possible.
Key takeaways
- The phase runs from the decision for surgery to transfer to the OR table, with four purposes: optimize, assess, educate, and verify.
- The provider performing the procedure obtains informed consent. The nurse verifies the signed form, witnesses the signature, checks understanding, and reports concerns — the nurse does NOT obtain consent or decide capacity, and consent obtained after sedation is invalid.
- NPO rules vary by anesthesia provider and facility — always confirm exactly what and when the person last ate or drank, document it, and report violations.
- Preoperative teaching prevents complications: deep breathing, coughing, splinting, incentive spirometry, leg exercises, and early mobility — demonstrated and returned, not just explained.
- Day of surgery: verify identity, procedure, and site marking; confirm consent, allergies, medications, and NPO; remove jewelry/dentures/contacts/prosthetics per policy; hand off with a structured report.
- The time out (right patient, right procedure, right site) occurs in the OR just before incision — the pre-op nurse's verification chain is what makes it reliable.
Check yourself
6 review questions from the chapter. Try each one, then open the answer.
When does the preoperative phase begin and end?
Show answer
It begins when the decision for surgery is made and ends when the person is transferred to the operating room table.
What are the four purposes of preoperative care?
Show answer
Optimize (prepare the person), assess (history, meds, allergies, baseline data), educate (what to expect, how to prevent complications), and verify (identity, procedure, site, consent, readiness).
What is the nurse's role in the informed consent process — and what is not part of it?
Show answer
The nurse verifies the signed consent is on the chart, witnesses the signature, confirms identity, reinforces teaching, and reports concerns about understanding or pressure. The nurse does NOT obtain consent or decide capacity — those belong to the provider and the law.
Why is NPO status important, and why must the nurse verify what the person actually ate or drank?
Show answer
Fasting reduces aspiration risk during anesthesia. Rules vary, so the nurse must confirm exactly what and when the person last ate or drank, document it, and report violations — a violation can delay the case.
List three items of preoperative teaching that help prevent postoperative complications.
Show answer
Any three: deep breathing and coughing, incentive spirometry, splinting the incision when coughing, leg exercises/ankle pumps, early ambulation expectations.
What does the time out verify, and when does it occur?
Show answer
The time out actively confirms the correct patient, correct procedure, and correct site — and it occurs in the operating room immediately before the incision (an intraoperative act prepared for by pre-op verification).
Study tools & related lessonsKey vocabulary · Related
Key vocabulary
- Informed consent
- Voluntary agreement to a procedure after understanding its nature, risks, benefits, and alternatives
- NPO (nothing by mouth)
- Fasting before anesthesia
- Time out
- A final verbal confirmation of correct patient, procedure, and site immediately before incision
Sources & references
This lesson was adapted from the open educational references above; their licenses and attributions are preserved. See Copyright & Licensing.
Educational content only. It is not medical, legal or professional advice. Found an error? Tell us.