Adult Health Nursing 1 - Unit 1 ( Introduction ) Quick Revision Notes For University Exams

Adult Health Nursing–I

UNIT 1: INTRODUCTION

• Evolution and trends of Medical-Surgical Nursing
• International Classification of Diseases (ICD)
• Roles and responsibilities of nurses in medical and surgical settings
• Medical asepsis and surgical asepsis
• Inflammation and infection
• Wound healing and factors affecting healing
• Wound care and dressing technique
• Care of surgical patient: Pre-operative and Post-operative
• Alternative therapies in Medical-Surgical Disorders

1. Evolution and Trends of Medical-Surgical Nursing

1.1 Meaning of Medical-Surgical Nursing

• Medical-Surgical Nursing is a major area of professional nursing concerned with the care of adults experiencing:
  • Medical disorders
  • Surgical conditions
  • Acute illnesses
  • Chronic illnesses
  • Pre-operative and post-operative conditions
  • Emergency and critical illnesses
• The nurse provides holistic care involving:
  • Physical needs
  • Psychological needs
  • Social needs
  • Spiritual needs
  • Health education
  • Rehabilitation
  • Patient safety

1.2 Historical Evolution

1. Early period
   • Nursing care was mainly provided by family members, religious groups and caregivers.
   • Limited scientific knowledge was available.
   • Infection prevention practices were poorly developed.
2. Florence Nightingale era
   • Emphasized cleanliness, ventilation, nutrition and environmental control.
   • Promoted systematic nursing education.
   • Established nursing as a professional discipline.
3. Development of germ theory
   • Improved understanding of microorganisms and infection.
   • Hand hygiene and aseptic practices became increasingly important.
4. Modern Medical-Surgical Nursing
   • Evidence-based practice
   • Advanced monitoring
   • Critical care
   • Electronic health records
   • Advanced diagnostic technologies
   • Multidisciplinary teamwork
   • Patient-centred care

1.3 Major Trends in Medical-Surgical Nursing

• Evidence-Based Nursing Practice
• Patient-Centred Care
• Safety-focused nursing
• Shorter hospital stays
• Day-care and minimally invasive procedures
• Increasing use of technology
• Telehealth and remote monitoring
• Electronic documentation
• Early mobilisation
• Enhanced recovery after surgery
• Interprofessional collaboration
• Preventive and rehabilitative care
• Community-based management of chronic diseases

Clinical Example:

A patient undergoes laparoscopic cholecystectomy and is discharged earlier than patients undergoing traditional open surgery. The nurse focuses on pain control, wound assessment, early mobilisation, nutrition, discharge education and recognition of warning signs.

Exam Point:

• Modern Medical-Surgical Nursing is not limited to bedside care.
• It includes prevention, assessment, treatment, rehabilitation, education and continuity of care.

2. International Classification of Diseases (ICD)

2.1 Definition

• ICD is an international system for classifying diseases, health conditions and causes of death.
• It provides standardized terminology and coding for health information.
• It is maintained and published by the World Health Organization (WHO).

2.2 Main Purposes of ICD

• Standardized classification of diseases
• Recording and reporting health conditions
• Mortality and morbidity statistics
• Health-service planning
• Research
• Epidemiological surveillance
• Hospital and health information management
• Comparison of health data between regions and countries

2.3 ICD-11

• ICD-11 is the latest revision of the WHO ICD system.
• It is designed for modern digital health information systems.
• It provides updated classification for diseases, disorders and health conditions.

Clinical/Documentation Example:

A patient is admitted with a confirmed diagnosis of acute myocardial infarction. The patient's diagnosis is documented using standardized terminology and can subsequently be assigned an appropriate ICD code by trained coding personnel.

Important: Nurses should document the patient's condition accurately. Nurses generally do not independently decide diagnostic ICD codes unless specifically trained and authorized for coding duties.

3. Roles and Responsibilities of Nurses in Medical-Surgical Settings

3.1 General Responsibilities

• Perform comprehensive patient assessment.
• Monitor vital signs and clinical status.
• Identify actual and potential health problems.
• Develop and implement nursing care plans.
• Administer medications safely.
• Maintain infection prevention practices.
• Provide wound and dressing care.
• Maintain fluid and electrolyte balance.
• Provide nutritional support.
• Manage pain.
• Prevent complications.
• Provide psychological support.
• Educate patients and families.
• Maintain accurate documentation.
• Communicate changes in condition promptly.
• Participate in emergency management.
• Promote rehabilitation and independence.
• Protect patient privacy and confidentiality.

3.4 Nurse in the Outpatient Department (OPD)

Major Responsibilities

• Receive and identify the patient.
• Perform initial assessment.
• Record vital signs.
• Identify urgent or emergency conditions.
• Prioritize patients according to clinical urgency.
• Prepare patients for examination.
• Assist healthcare professionals during procedures.
• Administer prescribed medications and treatments.
• Provide health education.
• Maintain records and documentation.
• Provide follow-up instructions.
• Explain medication and treatment instructions.
• Arrange referral when required.

Clinical Case:

A 58-year-old patient arrives at OPD with severe chest discomfort, sweating and breathlessness. The nurse should not simply place the patient in the routine queue. Immediate assessment and appropriate emergency escalation are required.

3.5 Nurse in the In-Patient Unit

• Receive and orient newly admitted patients.
• Verify patient identity using approved identifiers.
• Complete nursing assessment.
• Monitor vital signs.
• Administer medications.
• Maintain IV therapy.
• Monitor intake and output.
• Perform wound and dressing care.
• Prevent pressure injuries.
• Assist with mobility and activities of daily living.
• Provide nutritional care.
• Maintain infection prevention.
• Observe for deterioration.
• Communicate abnormal findings.
• Document nursing care.
• Prepare patients for diagnostic procedures.
• Provide discharge education.

3.6 Nurse in the Intensive Care Unit (ICU)

• Provide continuous monitoring of critically ill patients.
• Monitor ECG, oxygen saturation, blood pressure and other parameters as indicated.
• Assess airway, breathing and circulation.
• Manage oxygen therapy and assist with advanced airway care.
• Monitor mechanical ventilation when applicable.
• Administer high-alert medications carefully.
• Monitor fluid balance.
• Assess neurological status.
• Prevent ventilator-associated and device-associated infections.
• Provide pressure injury prevention.
• Maintain strict infection-control practices.
• Recognize early signs of deterioration.
• Assist during resuscitation.
• Communicate effectively with the multidisciplinary team.
• Provide family support and education.

ICU Case:

A ventilated patient suddenly develops an oxygen saturation of 82%. The nurse should immediately assess the patient, airway, breathing, equipment and other relevant causes, initiate appropriate emergency measures according to protocol, and promptly escalate the deterioration.

4. Medical Asepsis and Surgical Asepsis

4.1 Medical Asepsis

• Also called clean technique.
• Its objective is to reduce the number and transmission of microorganisms.
• It does not necessarily make an item completely free of microorganisms.

Examples

• Hand hygiene
• Routine cleaning of equipment
• Use of clean gloves when indicated
• Respiratory hygiene
• Environmental cleaning
• Safe handling of contaminated articles

4.2 Surgical Asepsis

• Also called sterile technique.
• Its objective is to prevent contamination of a sterile field or sterile item.
• It is required for procedures where sterility is essential.

Examples

• Sterile dressing procedures
• Insertion of certain invasive devices
• Surgical procedures
• Sterile catheterization when indicated
• Maintaining a sterile field during invasive procedures

4.3 Medical vs Surgical Asepsis

Feature	Medical Asepsis	Surgical Asepsis
Common name	Clean technique	Sterile technique
Main objective	Reduce microorganisms and transmission	Prevent contamination of sterile areas/items
Use	Routine patient care	Invasive/sterile procedures
Gloves	Clean gloves when indicated	Sterile gloves
Environment	Clean environment	Controlled sterile field as required
Example	Routine vital-sign assessment	Sterile wound dressing

Remember: A sterile object that becomes contaminated should be considered contaminated and replaced or managed according to institutional policy.

5. Inflammation

5.1 Definition

• Inflammation is a protective response of vascularized tissue to injury or harmful stimuli.
• Its purpose is to eliminate the initial cause of injury, remove damaged tissue and initiate repair.

5.2 Common Causes

• Infection
• Trauma
• Burns
• Chemical injury
• Foreign bodies
• Autoimmune reactions
• Tissue necrosis

5.3 Classical Signs of Inflammation

• Redness – Rubor
• Heat – Calor
• Swelling – Tumor
• Pain – Dolor
• Loss of function – Functio laesa

5.4 Acute vs Chronic Inflammation

Feature	Acute	Chronic
Onset	Rapid	Slow/persistent
Duration	Short	Long
Predominant cells	Neutrophils	Macrophages, lymphocytes and plasma cells
Examples	Acute bacterial infection, acute injury	Chronic inflammatory diseases, persistent infections

6. Infection

6.1 Definition

• Infection occurs when microorganisms enter a host, multiply and produce a host response.

6.2 Chain of Infection

1. Infectious agent
2. Reservoir
3. Portal of exit
4. Mode of transmission
5. Portal of entry
6. Susceptible host

6.3 Breaking the Chain of Infection

• Hand hygiene
• Personal protective equipment
• Respiratory hygiene
• Environmental cleaning
• Safe injection practices
• Sterilization and disinfection
• Appropriate waste management
• Isolation precautions when indicated
• Vaccination

Clinical Case:

A nurse performs wound care for an infected wound and then touches another patient's IV equipment without performing hand hygiene. This creates an opportunity for transmission of microorganisms. Proper hand hygiene between patients is a key measure for breaking the chain of infection.

7. Wound Healing

7.1 Definition

• Wound healing is the coordinated process by which damaged tissue is repaired.

7.2 Major Phases

Phase 1: Hemostasis

• Occurs immediately after injury.
• Vasoconstriction occurs.
• Platelets become activated.
• Blood clot formation begins.

Phase 2: Inflammation

• Inflammatory cells migrate to the injured area.
• Neutrophils help remove microorganisms and debris.
• Macrophages contribute to cleanup and coordination of repair.
• Redness, heat, swelling and pain may occur.

Phase 3: Proliferation

• Granulation tissue develops.
• Fibroblasts produce collagen.
• Angiogenesis occurs.
• Epithelial cells migrate across the wound.

Phase 4: Remodeling/Maturation

• Collagen is reorganized.
• Scar tissue becomes stronger and more organized.
• The final tensile strength remains below that of uninjured tissue.

7.3 Factors Affecting Wound Healing

Factor	Effect on Healing
Age	Advanced age may slow tissue repair
Nutrition	Protein, calories, vitamins and minerals are important
Oxygenation	Poor tissue oxygenation delays healing
Infection	Can delay healing and increase tissue damage
Diabetes	Can impair healing and increase infection risk
Smoking	Impairs oxygen delivery and tissue repair
Medications	Some drugs can interfere with inflammatory response or tissue repair
Circulation	Poor perfusion delays healing
Stress	May adversely affect recovery

Case:

A patient with diabetes has a foot wound that is healing slowly. The nurse should assess blood glucose control, circulation, nutrition, wound characteristics, infection signs, pressure/off-loading needs and adherence to the treatment plan.

8. Wound Care and Dressing Technique

8.1 Goals of Wound Care

• Promote healing
• Prevent infection
• Protect the wound
• Maintain an appropriate wound environment
• Remove or manage exudate
• Assess wound progress
• Reduce pain
• Protect surrounding skin

8.2 Wound Assessment

• Location
• Length
• Width
• Depth when appropriate
• Wound bed appearance
• Exudate amount
• Exudate colour and consistency
• Odour
• Condition of wound edges
• Condition of surrounding skin
• Pain
• Signs of infection

8.3 General Dressing Procedure

1. Verify the order and patient identity.
2. Explain the procedure to the patient.
3. Provide privacy.
4. Perform hand hygiene.
5. Prepare required supplies.
6. Position the patient comfortably.
7. Use appropriate PPE.
8. Remove the old dressing carefully.
9. Assess the wound.
10. Dispose of contaminated material safely.
11. Perform hand hygiene/change gloves as required.
12. Use the prescribed wound-cleaning solution and technique.
13. Apply the appropriate dressing.
14. Secure the dressing.
15. Reassess patient comfort.
16. Dispose of equipment according to policy.
17. Document the procedure and wound findings.

Safety Point: The exact wound-cleaning solution, dressing material and technique depend on wound type, clinical condition, procedure, institutional policy and prescribed treatment. Avoid applying non-prescribed substances to wounds.

9. Care of the Surgical Patient

9.1 Pre-operative Care

A. Pre-operative Assessment

• Medical history
• Surgical history
• Medication history
• Allergy history
• Baseline vital signs
• Relevant laboratory investigations
• Nutritional assessment
• Psychological assessment
• Airway and respiratory assessment when indicated
• Assessment of comorbidities

B. Patient Preparation

• Confirm patient identity.
• Confirm planned procedure according to institutional safety protocol.
• Verify informed consent is completed by the appropriate clinician/process.
• Check required investigations.
• Prepare the operative site according to policy.
• Maintain prescribed fasting instructions.
• Administer prescribed pre-operative medications.
• Remove jewellery and other prohibited items according to policy.
• Ensure appropriate patient identification.
• Provide psychological support.
• Educate the patient about:
  • Deep breathing exercises
  • Coughing and splinting
  • Early mobilisation
  • Pain management
  • Post-operative exercises

Pre-operative Case:

A patient is scheduled for abdominal surgery. During pre-operative assessment, the nurse discovers that the patient reports a previous severe drug allergy that is not clearly documented in the current chart. The nurse should immediately communicate the finding and ensure appropriate safety procedures are followed before medication administration or surgery.

10. Post-operative Care

10.1 Immediate Priorities

• Airway
• Breathing
• Circulation
• Level of consciousness
• Vital signs
• Pain
• Surgical site
• Drainage
• Urine output
• Fluid balance

10.2 General Post-operative Nursing Responsibilities

• Monitor vital signs as ordered and according to patient condition.
• Assess respiratory status.
• Assess level of consciousness.
• Assess pain.
• Monitor wound and dressing.
• Monitor drains and tubes.
• Monitor intake and output.
• Administer prescribed medications.
• Maintain IV therapy as prescribed.
• Encourage appropriate respiratory exercises.
• Promote early mobilisation when clinically appropriate.
• Prevent falls.
• Prevent pressure injuries.
• Monitor for complications.
• Provide nutrition according to surgical condition and orders.
• Educate patient before discharge.

10.3 Common Post-operative Complications

Complication	Possible Warning Signs	Nursing Focus
Hemorrhage	Bleeding, tachycardia, hypotension, pallor	Rapid assessment and urgent escalation
Respiratory complications	Dyspnea, low oxygen saturation, abnormal breathing	Airway/respiratory assessment and prompt intervention
Infection	Fever, increasing pain, purulent drainage, redness	Assessment, infection prevention and escalation
DVT	Unilateral swelling, pain, warmth	Prompt assessment and medical escalation
Urinary retention	Suprapubic discomfort, inability to void	Assess and follow prescribed management
Wound dehiscence	Separation of wound edges	Protect wound and obtain urgent medical review
Post-operative nausea/vomiting	Nausea, vomiting	Monitor hydration, aspiration risk and prescribed treatment

Emergency Case:

A patient on the first day after abdominal surgery suddenly becomes pale and restless. Pulse increases to 124/min and blood pressure falls. The dressing becomes rapidly soaked with blood.

Priority: Suspect significant bleeding and initiate immediate assessment and emergency escalation according to hospital protocol.

11. Alternative Therapies in Medical-Surgical Nursing

11.1 Meaning

• Alternative therapies refer to approaches used outside conventional biomedical treatment.
• Complementary therapies are used alongside conventional treatment.
• They should not automatically replace evidence-based medical treatment.

11.2 Examples

Therapy	Possible Use	Nursing Consideration
Relaxation techniques	Stress and anxiety management	Assess suitability and patient preference
Deep breathing	Relaxation and respiratory support as clinically appropriate	Teach correct technique
Music therapy	Relaxation and emotional comfort	Use according to patient preference
Massage	Relaxation and comfort	Avoid when contraindicated
Meditation	Stress management	Respect patient's preference and cultural context
Yoga	Flexibility, relaxation and wellbeing	Consider physical limitations and medical condition
Acupuncture	May be used for selected symptoms in appropriate settings	Should be performed by qualified practitioners
Herbal products	Used traditionally for various conditions	Assess for interactions, adverse effects and disclosure to healthcare team

Important Nursing Safety Principle: Natural does not automatically mean safe. Herbal and complementary products can interact with medicines, affect bleeding, blood glucose or blood pressure, and may be inappropriate in certain conditions.

12. Integrated Clinical Case Studies

Case 1 – Surgical Wound

• A 45-year-old patient is on postoperative day 3 after abdominal surgery.
• The patient reports increasing wound pain.
• Temperature is elevated.
• The wound has increasing redness and purulent drainage.

Questions:

1. What complication should the nurse suspect?
2. What wound characteristics should be assessed?
3. What infection-control measures are required?
4. What findings should be immediately reported?

Key Learning:

• Assess wound systematically.
• Recognize possible infection.
• Maintain appropriate aseptic technique.
• Document and promptly communicate significant findings.

Case 2 – OPD Triage

• A 62-year-old patient presents with sudden severe chest pain, sweating and breathlessness.

Priority Nursing Action:

• Perform rapid assessment.
• Recognize potential emergency.
• Activate appropriate emergency response according to facility protocol.
• Do not delay urgent evaluation for routine registration processes.

Case 3 – ICU Deterioration

• An ICU patient develops sudden respiratory distress.
• Oxygen saturation decreases significantly.
• The patient becomes restless.

Priority:

• Assess airway and breathing immediately.
• Check oxygen delivery and relevant equipment.
• Assess vital signs.
• Escalate promptly according to emergency protocol.
• Document the event and interventions.

Case 4 – Poor Wound Healing

• A patient with diabetes has a chronic foot wound.
• The wound shows delayed healing.

Nursing Assessment:

• Blood glucose control
• Circulation/perfusion
• Nutrition
• Infection
• Pressure and footwear
• Wound characteristics
• Patient adherence and self-care practices

13. Quick Revision – Unit 1

• Medical-Surgical Nursing: Nursing care of adults with medical and surgical health problems.
• ICD: International system for classification of diseases and health conditions.
• Medical asepsis: Clean technique used to reduce microorganisms and transmission.
• Surgical asepsis: Sterile technique used to prevent contamination of sterile areas/items.
• Classical signs of inflammation: Redness, heat, swelling, pain and loss of function.
• Chain of infection: Agent → Reservoir → Portal of exit → Transmission → Portal of entry → Susceptible host.
• Wound healing: Hemostasis → Inflammation → Proliferation → Remodeling.
• Pre-operative nursing: Assessment, preparation, education, safety and psychological support.
• Post-operative nursing: ABC assessment, monitoring, pain control, wound care, complication prevention and rehabilitation.
• Alternative/complementary therapies: Should be assessed for safety, appropriateness and interactions with conventional treatment.

14. High-Yield Clinical Questions for Students

1. A patient with sudden chest pain arrives in OPD. What should determine nursing priority?
2. What is the difference between medical and surgical asepsis?
3. What are the six links of the chain of infection?
4. Which phase of wound healing involves granulation tissue formation?
5. What factors can delay wound healing?
6. What are the priorities in immediate post-operative assessment?
7. What findings suggest possible wound infection?
8. Why is accurate nursing documentation important?
9. What responsibilities does a nurse have in an ICU?
10. Why should herbal products be assessed before use with conventional medications?

UNIT 1 CORE CONCEPT:

The central role of the Medical-Surgical Nurse is to provide safe, systematic, evidence-informed and patient-centred care through assessment, planning, implementation, evaluation, education, prevention of complications and timely recognition of deterioration.