Unit 1562: Surgical Pathophysiology and Perioperative Management

1. Introduction to Surgical Pathophysiology

• Overview of pathophysiology in surgery
• Basic principles of disease processes
  • Etiology: causes of surgical diseases
  • Pathogenesis: mechanisms of disease
  • Clinical manifestations relevant to surgery
• Impact of systemic diseases on surgical outcomes

2. Inflammation and Wound Healing

• The inflammatory response
  • Acute vs chronic inflammation
  • Cellular players: neutrophils, macrophages, lymphocytes
  • Role of cytokines and chemokines
• Phases of wound healing
  • Hemostasis
  • Inflammatory phase
  • Proliferative phase: fibroblast activity, angiogenesis
  • Remodeling/maturation phase
• Growth factors involved in healing (e.g., VEGF, PDGF, TGF-β)
• Factors influencing wound healing in surgical patients

3. Hemostasis and Coagulation

• Mechanisms of hemostasis
  • Vascular spasm
  • Platelet plug formation
  • Coagulation cascade overview: intrinsic, extrinsic, and common pathways
• Clot formation and stabilization
• Fibrinolysis
• Anticoagulant therapies
  • Heparin, warfarin, direct oral anticoagulants
• Management of surgical bleeding and coagulation disorders

4. Surgical Infections

• Types of surgical site infections (SSI)
  • Superficial, deep incisional, organ/space infections
• Risk factors for SSIs
• Prevention strategies
  • Sterile technique
  • Antibiotic prophylaxis
  • Patient optimization
• Diagnosis and management
  • Microbiological considerations
  • Antibiotic therapies
  • Infection control measures

5. Fluid and Electrolyte Imbalance in Surgery

• Overview of fluid compartments and balance
• Causes of fluid imbalance during surgery
  • Blood loss
  • Third spacing
  • IV fluid administration
• Electrolyte disturbances
  • Sodium, potassium, calcium, magnesium imbalances
• Clinical manifestations and monitoring
• Management strategies

6. Tissue Injury and Repair

• Mechanisms of tissue injury during surgery
• Cellular responses to injury
• Tissue repair processes
  • Regeneration vs repair
• Role of fibrosis and scarring
• Techniques for wound closure
  • Sutures, staples, adhesives

7. Complications of Surgical Procedures

• Common complications
  • Hemorrhage
  • Infection
  • Organ dysfunction (e.g., respiratory, renal)
  • Thromboembolism
• Early recognition signs
• Principles of management
• Prevention and risk reduction

8. Pharmacology in Surgery

• Principles of perioperative pharmacology
• Drug interactions and considerations
• Anesthesia medications
  • General anesthetics
  • Local anesthetics
• Analgesics and pain management
• Perioperative medication management
  • Antibiotics
  • Anticoagulants
  • Steroids and other immunomodulators

9. Surgical Oncology and Tumor Pathophysiology

• Cancer pathophysiology
  • Tumor growth and progression
  • Metastasis mechanisms
• Principles of oncological surgery
  • Resection margins
  • Lymph node dissection
• Adjuvant therapies
  • Chemotherapy
  • Radiation therapy
• Multidisciplinary management

10. Organ Failure and Surgical Management

• Pathophysiology of organ failure in surgical patients
  • Respiratory failure
  • Renal failure
  • Cardiac failure
  • Hepatic failure
• Causes related to surgery
• Clinical manifestations
• Multidisciplinary approaches to support and salvage
  • Organ support devices
  • Transplantation considerations
• Postoperative monitoring and care