Pre-operative Assessment and Patient Teaching for Nursing Exams

Pre-operative nursing care sets the foundation for safe surgical outcomes. This guide reviews how to assess the patient, classify surgical risk, manage medications, ensure informed consent, and teach the patient what to expect before and after surgery — all high-yield topics for NCLEX and nursing exams.

Purposes of Pre-operative Assessment

• Identify patient risks that could affect surgical outcomes.
• Establish a baseline for vital signs, laboratory values, and physical status.
• Provide an opportunity to educate the patient and obtain informed consent.

Components of Pre-operative Assessment

• Health history — Ask about previous surgeries, anesthesia reactions, bleeding disorders, chronic diseases, and allergies (latex, medications).
  • Exam pearl: A latex allergy requires latex-free supplies in the OR.
• Medication review — List all prescription drugs, OTC products, and herbs. Note anticoagulants, aspirin, NSAIDs, insulin, oral hypoglycemics, and herbal products (garlic, ginkgo, ginseng).
  • Exam pearl: Anticoagulants increase bleeding risk; many herbs affect clotting.
• Physical assessment — Assess airway (Mallampati score), cardiovascular, respiratory, and nutritional status.
  • Exam pearl: Mallampati III/IV predicts difficult intubation.
• Diagnostic tests — CBC, PT/INR, PTT, BMP, glucose, pregnancy test, ECG (age >50), chest X-ray (age >70).
  • Exam pearl: A pregnancy test is required for all women of childbearing age.
• Psychosocial assessment — Evaluate anxiety, understanding, support system, and advance directives.
  • Exam pearl: High anxiety increases post-op complications.
• ASA Physical Status Classification — Assigned based on the patient's overall health, not the surgical procedure.
  • Exam pearl: Higher ASA = higher perioperative risk.

ASA Physical Status Classification

The ASA classification predicts surgical risk based on the patient's underlying health, not the type or complexity of surgery. Higher ASA class indicates higher risk of complications.

• ASA I — Normal healthy patient. Example: No medical problems, non-smoker, minimal alcohol use.
• ASA II — Mild systemic disease without functional limitation. Example: Controlled hypertension, well-controlled diabetes, obesity (BMI <35), mild COPD, smoker.
• ASA III — Severe systemic disease with functional limitation. Example: Poorly controlled diabetes, stable angina, COPD with dyspnea on exertion, BMI >40.
• ASA IV — Severe systemic disease that is a constant threat to life. Example: Unstable angina, severe heart failure, end-stage renal disease, sepsis.
• ASA V — Moribund patient not expected to survive without surgery. Example: Ruptured aneurysm, massive trauma, intracranial bleed with mass effect.
• ASA VI — Brain-dead patient whose organs are being harvested.

NCLEX Trap: ASA class is based on the patient's condition, not the surgery. A healthy patient having major surgery is still ASA I, while a sick patient having minor surgery may be ASA III or IV.

Informed Consent

• The surgeon explains the procedure, risks, benefits, and alternatives.
• The nurse's role is to witness the signature, confirm understanding, and ensure there is no coercion.
• Consent is invalid if the patient is confused, sedated, or under the influence of medication.
• The patient may withdraw consent at any time before the procedure.

NPO Guidelines (ASA 2023 Recommendations)

• 2 hours before surgery: Clear liquids allowed (water, black coffee, clear juice, carbonated beverages). No liquids containing protein (milk, formula, protein shakes).
• 6 hours before surgery: Light meal allowed (toast, cereal, clear liquids). No fried foods, fatty meats, or large meals.
• 8 hours before surgery: No heavy meals (fatty foods, meat).

Key points:

• NPO status reduces the risk of aspiration pneumonitis during anesthesia induction.
• Essential oral medications may be taken with a small sip of water up to 2 hours before surgery if approved.
• NPO includes no chewing gum, mints, or ice chips unless approved.

Pre-operative Teaching

• Deep breathing exercises to prevent atelectasis and pneumonia.
• Splint the incision with a pillow when coughing to reduce pain.
• Incentive spirometry: inhale slowly to raise the piston, hold for 3–5 seconds, use 10 times per hour while awake.
• Turn every 2 hours to prevent pressure ulcers and improve lung expansion.
• Ankle pumps and leg lifts every hour to prevent deep vein thrombosis (DVT).
• Request pain medication before pain becomes severe; only the patient pushes the PCA button.
• Early ambulation: sit on edge of bed → dangle legs → stand with assistance → walk.
• Review NPO requirements.
• Stop smoking at least 24–48 hours before surgery (ideally 4–6 weeks).
• Teach breathing and coughing exercises before surgery, not after.

Medications to Hold Before Surgery

• Anticoagulants (warfarin, apixaban, rivaroxaban, heparin) — Bleeding risk. Hold 2–7 days.
• Antiplatelets (aspirin, clopidogrel) — Bleeding risk. Hold 5–7 days. Aspirin may be continued in cardiac patients.
• NSAIDs (ibuprofen, naproxen) — Bleeding risk. Hold 24–48 hours.
• Oral hypoglycemics (metformin, glyburide) — Hypoglycemia; metformin may cause lactic acidosis. Hold day of surgery (often 24–48 hours for metformin).
• Insulin — Hypoglycemia. Often half the morning dose; consult provider.
• ACE inhibitors / ARBs (lisinopril, losartan) — Hypotension during anesthesia. Hold day of surgery.
• Diuretics (furosemide, HCTZ) — Hypovolemia, electrolyte imbalance. Hold day of surgery.
• Herbal supplements (garlic, ginkgo, ginseng, St. John's wort) — Bleeding or anesthesia interactions. Stop 1–2 weeks before surgery.

Always verify holding instructions with the provider and anesthesia team.

Day of Surgery Nursing Actions

• Verify patient identity using two identifiers.
• Confirm informed consent is signed and in the chart.
• Verify NPO status by asking when the patient last ate or drank.
• Check that all pre-operative orders, labs, and imaging are completed.
• Administer pre-operative medications as ordered (e.g., anxiolytics, antibiotics).
• Remove jewelry, dentures, contact lenses, hearing aids, nail polish, and makeup.
• Document height, weight, and baseline vital signs.
• Start an IV (large-bore) as ordered.
• Apply sequential compression devices (SCDs) or anti-embolism stockings.
• Complete the pre-operative checklist.

Patient Teaching for Discharge

• Explain the expected length of hospital stay.
• Review activity restrictions (no heavy lifting, no driving).
• Teach signs of complications to report: fever, excessive bleeding, wound redness or drainage, severe pain, shortness of breath, chest pain.
• Ensure the patient has a ride home and an escort for the first 24 hours after outpatient surgery.
• Review medication instructions, including which drugs to resume and when.

Common Exam Traps

• The surgeon, not the nurse, obtains informed consent.
• The nurse cannot obtain consent if the patient is sedated or confused.
• ASA class is based on the patient's condition, not the surgery type.
• NPO includes no gum, mints, or ice chips unless approved.
• Metformin is often held 24–48 hours pre-op to prevent lactic acidosis.
• Aspirin may be continued in cardiac patients — verify with provider.
• Herbal supplements (garlic, ginkgo, ginseng) increase bleeding risk.
• Latex allergy requires latex-free OR supplies.
• Pregnancy test required for all women of childbearing age.
• Deep breathing and coughing must be taught before surgery.

Key Takeaways

• Pre-op assessment covers health history, medications, physical exam, diagnostics, psychosocial status, and ASA class.
• ASA classification reflects the patient's health, not the surgery, and higher class means higher risk.
• The surgeon obtains informed consent; the nurse witnesses and confirms understanding — consent is invalid if the patient is sedated or confused.
• Follow ASA NPO rules: 2 hours for clear liquids, 6 hours for light meals, 8 hours for heavy meals to prevent aspiration.
• Hold anticoagulants, antiplatelets, NSAIDs, ACE inhibitors/ARBs, diuretics, metformin, and herbal supplements per provider orders.
• Teach deep breathing, incentive spirometry, splinting, ankle pumps, and early ambulation before surgery to prevent post-op complications.