Fundamentals of Nursing · Perioperative Nursing Care

Postoperative Phase

8 min read

On this page 9 sections

In 30 seconds
Why this matters
The college version
Eli explains
Worked example
Key takeaway
Check yourself
Study tools
Sources & references

In 30 seconds

The begins when the surgical procedure ends and the patient is transferred to the post-anesthesia care unit (). It continues through recovery on the surgical unit and lasts until the patient has healed enough to be discharged — for outpatient surgery, that can be the same day; for major surgery, it may be days or longer.

Recovery is usually described in two segments. Immediate recovery happens in the PACU, where patients wake from anesthesia under close monitoring. Later recovery happens on the nursing unit, where the focus shifts to preventing complications, promoting healing, and preparing the patient to go home. Because most surgical complications become apparent after the procedure, the postoperative period is where astute nursing assessment makes the biggest difference.

Why this matters

Many of the most dangerous surgical events — airway obstruction, hemorrhage, respiratory depression from opioids, infection, blood clots — occur in the hours and days after surgery. The nurse at the bedside is usually the first person to notice subtle changes, and early recognition separates a manageable problem from an emergency. The postoperative phase is also high-yield on exams: ABCs in the PACU, the standard complication list, and discharge teaching are frequently tested — and in practice, this is where nurses do the most independent work.

The college version

Core Concepts

The PACU: immediate recovery

is high-intensity: patients are monitored closely, often one or two per nurse, until they are stable.
prepares patients who are going home the same day (ambulatory surgery) — they become more alert, take fluids, and receive discharge teaching.
Priority assessment is ABCs: airway patency, breathing depth and rate, and circulation (pulse, blood pressure, perfusion). Anesthesia and opioids can depress breathing, so the airway is assessed first and constantly.
Patients may emerge from anesthesia with confusion, shivering, or restlessness; nurses reorient them and protect them from injury, including side rails and close observation.
Discharge from the PACU is based on criteria, not time. Facilities use standardized scoring tools that measure things like consciousness, breathing, circulation, and activity. The exact tool and thresholds vary by institution; the nurse's judgment must confirm that the patient is genuinely stable.
Handoff matters. The anesthesia provider and circulating nurse give a structured report (patient, procedure, anesthesia course, medications, fluids, allergies, concerns) before the PACU nurse assumes care.

Preventing common postoperative complications

Respiratory: anesthesia, opioids, and lying still cause shallow breathing, collapsed air sacs (), and pneumonia. Measures: repositioning, deep-breathing exercises, , coughing as tolerated, adequate pain control, and early ambulation.
Hemorrhage and shock: bleeding can occur at the site or internally. Nurses monitor vital signs, dressings, drains, and urine output, and report unexpected bleeding or instability promptly.
Venous thromboembolism (VTE): surgery and immobility slow blood flow and raise clot risk. Prevention includes early ambulation, sequential compression devices, and, when ordered, prophylactic medications — orders and protocols vary by institution and surgeon.
Nausea and vomiting: common after anesthesia and opioids. Nurses position the patient safely to protect the airway and give antiemetics as ordered.
Gastrointestinal slowing: anesthesia and opioids slow the gut, causing constipation or a temporary pause in bowel function (paralytic ileus). Early mobility, fluids, and a slow return to diet help; nurses monitor for distension and return of bowel sounds.
Urinary retention: anesthesia and surgery can make emptying the bladder hard. Nurses monitor output and bladder comfort and report distension.
Surgical site problems: infection, wound separation (), and organs protruding through the wound () are risks. Nurses use hand hygiene, keep dressings clean and dry, and report redness, warmth, swelling, drainage, or fever. Evisceration is an emergency — cover the wound and get help immediately.
Pain: uncontrolled pain keeps patients from breathing deeply, moving, and resting. Nurses assess pain with an appropriate scale, give medications as ordered, and use nonpharmacologic comfort measures as appropriate.

Nursing care on the unit

Care on the surgical unit includes frequent vital signs and focused assessments (frequency follows orders and institutional policy), incision and drain care, intake and output, gradual diet advancement, early mobilization, and daily hygiene and comfort measures. Scope note: exactly which assessments and tasks an RN, LPN/LVN, or assistive personnel may perform varies by jurisdiction and facility policy.

Discharge teaching

Before discharge, the nurse teaches the patient and family how to care for the incision, which symptoms to report (fever, redness or increasing drainage at the site, uncontrolled pain), activity restrictions and when to resume work or driving, how to take prescribed medications, and when follow-up appointments occur. Teaching verified with teach-back prevents readmissions and complications.

How It Works / Step-by-Step Process

The patient is transferred to the PACU with a structured handoff from the anesthesia provider and circulating nurse.
The PACU nurse immediately assesses airway, breathing, and circulation, then pain, level of consciousness, temperature, site, drains, and output.
The patient is monitored continuously; nausea, shivering, and emergence confusion are managed.
When are met, the patient transfers to the surgical unit (or goes home if outpatient).
On the unit, the nurse performs scheduled assessments, prevents complications (mobility, breathing exercises, VTE prevention), manages pain, and advances diet and activity.
Before discharge, the nurse provides teaching and verifies understanding; follow-up is scheduled.

Common Confusions

Do not confuse	With	Difference
Postoperative phase	Intraoperative phase	Postoperative begins when surgery ends (PACU onward); intraoperative is the surgery itself.
Transfer to PACU	Discharge from the facility	PACU transfer is just the start of recovery; discharge comes much later after criteria are met.
Atelectasis	Pneumonia	Atelectasis is collapsed air sacs; pneumonia is an infection. Atelectasis can lead to pneumonia.
Dehiscence	Evisceration	Dehiscence is the wound edges separating; evisceration is organs protruding through the wound and is an emergency.
Sedation after opioids	Respiratory depression	Some sleepiness is expected, but slow or shallow breathing is a danger sign that must be reported immediately.
PACU stay length	PACU readiness to discharge	Length of stay does not equal readiness; discharge is based on criteria.

Eli explains

The same idea, in plain words

Explain it like I’m 10

After the operation, the patient goes to a special recovery room where nurses watch them carefully while they wake up from the sleep medicine, checking that they are breathing and their heart is fine. When they are stable, they move to a regular room, where nurses help them get moving, eat, and learn how to take care of their bandage at home. If anything seems wrong — like a fever or a very wet bandage — the nurse is the first to notice and get help.

Worked example

Mr. Okafor, 58, had a laparoscopic hernia repair and is now in the PACU. The PACU nurse's first check is his airway: it is open, his breathing is regular, and his oxygen saturation is within his expected range. She orients him — "You're in the recovery room, your surgery is finished" — and notes he is shivering, so she warms him. His pain is reported as 6 on a 0–10 scale, so the nurse gives the ordered analgesic and reassesses. After he meets the facility's discharge criteria, he is transferred to the surgical unit.

Later that evening, Mr. Okafor feels nauseated; the nurse positions him on his side, gives the ordered antiemetic, and holds his diet until he tolerates fluids. In the morning he walks the hallway with help, uses his incentive spirometer, and passes gas — a reassuring sign his bowel function is returning. Before discharge, the nurse reviews his incision care, tells him to report fever, redness, or increasing drainage, reviews his activity limits (no heavy lifting until his follow-up), and asks him to repeat the instructions back. He leaves with a follow-up appointment scheduled and a number to call with concerns.

Key takeaways

The postoperative phase begins with transfer to the PACU and continues until discharge from care.
ABCs are the first priority in the PACU; anesthesia and opioids can depress breathing.
Recovery has two segments: Phase I (close monitoring) and Phase II (preparing for discharge home).
PACU discharge uses criteria tools, not elapsed time; criteria and thresholds vary by institution.
Big complications to prevent: atelectasis/pneumonia, hemorrhage/shock, VTE, nausea/vomiting, ileus, urinary retention, wound infection, and wound separation.
Early ambulation, incentive spirometry, deep breathing, and adequate pain control prevent many complications at once.
Dehiscence is wound separation; evisceration (organs protruding) is an emergency.
Discharge teaching should cover wound care, activity limits, medication use, symptoms to report, and follow-up — and should be verified with teach-back.

Check yourself

5 review questions from the chapter. Try each one, then open the answer.

What is the first priority in PACU assessment, and why?
Show answer
Airway, breathing, and circulation (ABCs), because anesthesia and opioids can depress breathing and the airway can become obstructed.
What is the difference between Phase I and Phase II recovery?
Show answer
Phase I is close monitoring immediately after surgery; Phase II prepares patients (often same-day surgery patients) to go home.
Name four common postoperative complications and one nursing measure that helps prevent each.
Show answer
Examples: atelectasis (incentive spirometry, deep breathing, early ambulation); hemorrhage (monitor vital signs, dressing, drain output); VTE (early ambulation, sequential compression devices); ileus/constipation (early mobility, diet advancement); urinary retention (monitor output and bladder comfort); wound infection (hand hygiene, dressing assessment).
Why is discharge from the PACU based on criteria rather than time?
Show answer
Because time alone does not reflect stability; a patient may be in the PACU a long time and still not meet the physiologic criteria for safe transfer.
What is the difference between dehiscence and evisceration, and how should the nurse respond to evisceration?
Show answer
Dehiscence is the wound edges separating; evisceration is organs protruding through the wound. Evisceration is an emergency: cover the wound with sterile saline-soaked dressing as available and immediately notify the provider/team — do not try to push organs back.

Keep learning

Ready to build on this? Continue to the next lesson.

Study tools & related lessonsKey vocabulary · Related

Key vocabulary

Postoperative phase: Recovery after surgery, from transfer to the PACU until discharge from care.
PACU: Post-anesthesia care unit, where patients wake from anesthesia under close monitoring.
Phase I recovery: High-intensity PACU monitoring until the patient is stable.
Phase II recovery: Step-down PACU care preparing patients (often same-day surgery) to go home.
Atelectasis: Collapse of small air sacs in the lung from shallow breathing.
Dehiscence: Separation of the edges of a surgical wound.
Evisceration: Organs protruding through a separated surgical wound.
Incentive spirometry: A device that encourages slow, deep breaths to keep lungs expanded.
Discharge criteria: Standardized criteria a patient must meet before leaving the PACU.

Sources & references

openstax.org — Fundamentals Nursing

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.