Preoperative Care: Definition, Components, and Purpose
Preoperative care encompasses all medical services provided to a patient before a surgical procedure to optimize safety, outcomes, and informed consent.
Core Components
1. Preoperative Assessment
- History & Physical: HPI, PMH, PSH, medications (including OTC/herbals), allergies, social history (tobacco, EtOH, drugs), family history (anesthesia complications, bleeding disorders).
- Focused exam: Airway (Mallampati, thyromental distance), cardiac, pulmonary, surgical site.
2. Diagnostic Testing (Risk-Stratified)
| Test | Indications |
|---|
| CBC, BMP, Coags (PT/INR, PTT) | Major surgery, blood loss anticipated, anticoagulation, liver/renal disease |
| HbA1c | Diabetes (target <8% elective) |
| ECG | Age >45–50, cardiac history, hypertension, dyspnea |
| Chest X-ray | Cardiopulmonary symptoms, >70 yo, thoracic/upper abdominal surgery |
| PFTs | COPD, restrictive disease, lung resection |
| Echo/Stress test | Active cardiac conditions, poor functional capacity + high-risk surgery |
| Pregnancy test | All women of childbearing potential |
Type & Screen / Crossmatch: Based on anticipated blood loss.
3. Risk Stratification Tools
- ASA Physical Status Classification (I–VI).
- RCRI (Revised Cardiac Risk Index) for perioperative cardiac risk.
- NSQIP Surgical Risk Calculator.
- Frailty indices (elderly).
4. Optimization Interventions
- Medication management: Hold ACEi/ARB, diuretics, SGLT2i, anticoagulants per protocol; bridge if indicated.
- Anemia correction (iron, ESA).
- Glycemic control.
- Smoking cessation (≥4 weeks ideal).
- Nutritional optimization (immunonutrition for major cancer surgery).
- Prehabilitation: exercise, inspiratory muscle training, psychological prep.
5. Patient Education and Consent
- Procedure explanation, alternatives, risks, benefits, expected recovery.
- Enhanced Recovery After Surgery (ERAS) pathway education.
- Advance directives review.
- Preoperative fasting: NPO solids 8 hrs, clear liquids 2 hrs (ASA guidelines).
- Preoperative carbohydrate loading (clear carb drink 2–3 hrs pre-op) — ERAS standard.
6. Multidisciplinary Coordination
- Anesthesia evaluation (separate or combined).
- Specialty clearance (cardiology, pulmonology, hematology, etc.).
- Case scheduling, equipment, blood products, ICU bed planning.
Goals
- Reduce perioperative morbidity/mortality.
- Decrease cancellations/delays.
- Shorten length of stay.
- Improve patient satisfaction and shared decision-making.
Preoperative care is a systematic process, not a checkbox — essential for surgical quality and safety.
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