Definition and Importance of Occupational Safety and Health

Definition and Importance of Occupational Safety and Health

By the end of this lesson, the learner should be able to:

• Define occupational health, occupational safety, occupational disease, hazard, risk, incident and accident.
• Explain the physical, mental and social dimensions of worker wellbeing.
• Differentiate a hazard from the risk created by exposure to that hazard.
• Classify common physical, chemical, biological, ergonomic, mechanical, electrical, fire and psychosocial hazards.
• Relate workplace exposures to occupational injuries and diseases.
• Conduct a simple hazard identification and risk assessment before, during and after a task.
• Apply the hierarchy of controls, including elimination, substitution, engineering controls, administrative controls and PPE.
• Describe the functions of an occupational health service and the responsibilities of employers, supervisors, workers and safety committees.
• Explain why OSH improves patient safety, productivity, staff retention, legal compliance and the quality of care.
• Apply OSH principles to realistic Ugandan health-facility and community-work situations.

1.1 Occupational health

Occupational health is the promotion and maintenance of the highest degree of physical, mental and social wellbeing of workers in all occupations. It includes preventing departures from health caused by working conditions, protecting workers from risks arising from adverse factors at work, adapting work to human capabilities, and adapting each worker to a suitable job. The goal is preventive: hazards are anticipated and controlled before they cause harm, rather than waiting to treat an injury or disease after it occurs.

1.2 Occupational safety

Occupational safety is the prevention of work-related injuries, dangerous occurrences, fires, explosions, equipment damage and other immediate incidents. Safety is concerned with the way work is designed and performed: safe equipment, competent people, safe systems of work, emergency preparedness, supervision and learning from near misses.

1.3 Occupational safety and health (OSH)

OSH is the multidisciplinary science and practice of anticipating, recognising, evaluating and controlling hazards arising in or from the workplace that could impair the health and wellbeing of workers, affect surrounding communities or damage the general environment. It combines occupational medicine, nursing, hygiene, epidemiology, ergonomics, psychology, engineering, fire safety, law, education and management.

1.4 Key terms that must not be confused

2.1 Overall aim

The overall aim is to protect and promote the health, safety, capacity and dignity of every worker while ensuring that work does not harm patients, visitors, families, contractors, the public or the environment.

2.2 Specific objectives

1. Promote and maintain physical, mental and social wellbeing.
2. Prevent occupational injuries, diseases, disabilities and premature deaths.
3. Protect workers from chemical, physical, biological, ergonomic and psychosocial risks.
4. Adapt the workplace, tools, workload and work organisation to human physiological and psychological capabilities.
5. Place a worker in work suited to their capacity and make reasonable adjustments when disability, pregnancy or illness affects work ability.
6. Provide health surveillance, early diagnosis, treatment, rehabilitation and safe return-to-work support.
7. Build a safety culture in which reporting hazards and near misses leads to improvement rather than blame.
8. Meet legal, professional, institutional and ethical duties.
9. Maintain continuity and quality of patient care during normal work and emergencies.

2.3 Scope: who and what is covered?

OSH includes permanent and temporary employees, students, volunteers, casual workers, cleaners, security staff, contractors, visitors and self-employed people. It covers routine work, night duty, overtime, transport, home visits, outreach, disaster response, maintenance, waste handling, storage, procurement and the transition between work and rest. A risk does not become acceptable merely because the worker is a student or is not on the payroll.

3.1 The three dimensions of wellbeing

3.2 Main components

• Industrial/occupational hygiene: anticipation, measurement and control of workplace exposures.
• Occupational medicine and nursing: pre-placement assessment, first aid, treatment, health surveillance, referral and rehabilitation.
• Occupational epidemiology: studying patterns of injury and disease to identify causes and high-risk groups.
• Safety engineering: safer building design, machine guarding, electrical safety, fire protection and maintenance.
• Ergonomics: fitting the task, equipment and environment to the worker rather than forcing the worker to compensate for poor design.
• Occupational psychology: supporting mental health, communication, teamwork, motivation and safe behaviour.
• Rehabilitation: restoring function, preventing further disability and supporting a safe, dignified return to work.
• Health promotion and welfare: nutrition, safe water, sanitation, communicable-disease control, health education, rest, maternity support and social services.

3.3 Core functions of an occupational health service

1. Assess fitness for placement without discriminating against a person with a disability or chronic condition.
2. Provide first aid and emergency response, with accessible first-aid boxes, trained responders and referral arrangements.
3. Conduct periodic and special examinations for workers in hazardous operations, while protecting confidentiality.
4. Monitor the working environment and recommend control of dangerous substances, noise, heat, radiation, dust, infection and workload.
5. Provide immunisation, post-exposure prophylaxis, health education, counselling and disease prevention.
6. Inspect sanitation, water, ventilation, lighting, toilets, changing areas, rest space, food service and waste disposal.
7. Maintain secure medical and incident records for follow-up, trend analysis and prevention.
8. Advise management and safety committees on safer placement, modified duties and reasonable accommodation.
9. Liaise with infection prevention, human resources, engineering, laboratory, pharmacy, waste and emergency teams.

4.1 The source–pathway–person model

A useful investigation asks three questions: What is the source? How can the hazard reach a person? Who is exposed and what harm can result? For example, a tuberculosis patient is the source; poorly ventilated air is the pathway; a student performing prolonged close contact without a respirator is the exposed person. Controls can therefore act at the source, along the pathway or on the person.

4.2 Classification of hazards

4.3 Physical hazards in detail

• Heat: causes prickly heat, cramps, dehydration, heat exhaustion and heat stroke; fatigue and reduced alertness indirectly increase accidents. Use shade, ventilation, drinking water, acclimatisation, rest and early recognition of confusion or collapse.
• Cold and wet: prolonged exposure causes discomfort, reduced dexterity, hypothermia and skin injury. Provide dry clothing, shelter, warm-up breaks and safe work rotation.
• Lighting: poor or glaring light produces eye strain, headache, watering and errors. Provide suitable task lighting, clean windows and safe replacement of bulbs.
• Noise: can cause temporary or permanent hearing loss, fatigue, nervousness and interference with speech. Reduce noise at source, isolate equipment, maintain machines and use hearing protection where necessary.
• Vibration: repeated hand-arm vibration can injure nerves and blood vessels, producing numbness, pain and Raynaud-type “white finger”; whole-body vibration worsens back disorders. Maintain tools and limit exposure time.
• Ultraviolet radiation: may cause conjunctivitis and keratitis (“welder’s flash”). Use shielding, screens and suitable eye/skin protection.
• Ionising radiation: may cause tissue injury, cataracts, infertility, genetic effects, cancer and leukaemia. Apply time, distance and shielding; use dosimetry and never remain in a radiation room unnecessarily.

4.4 Chemical hazards

Chemicals enter through inhalation, ingestion, injection or skin/eye absorption. The local effect may be dermatitis, eczema, ulcers, burns or eye injury; systemic effects may involve the nervous system, liver, kidneys, blood, reproduction or cancer risk. Dusts, fumes, vapours, gases and aerosols can be inhaled even when a substance has no obvious smell.

• Keep chemicals in original, labelled containers with safety information available.
• Never mix bleach with acids or ammonia; toxic chlorine gas may be released.
• Use the smallest practicable quantity, closed systems, local exhaust ventilation and spill kits.
• Wear chemical-resistant gloves, apron and eye/face protection selected for the substance; ordinary examination gloves are not protection from every chemical.
• Do not eat, drink or store food in chemical areas. Wash hands after removing PPE.
• Report symptoms such as wheeze, rash, eye pain, dizziness or a chemical spill immediately.

4.5 Biological hazards

Health workers may be exposed to blood-borne viruses, respiratory pathogens, contact organisms, contaminated sharps, laboratory cultures, animals, insects and waste. Prevention combines standard precautions for every patient, transmission-based precautions when indicated, vaccination, ventilation, safe sharps practice, hand hygiene, environmental cleaning, exposure reporting and timely post-exposure care.

4.6 Ergonomic and manual-handling hazards

Injuries occur when the load is too heavy, unstable, distant from the body, handled too often, or moved in an awkward environment. Patient handling is a team task, not a test of individual strength.

1. Assess the patient, load, route, floor, bed height and number of people required before moving.
2. Explain the procedure and obtain cooperation where possible.
3. Use mechanical aids, slide sheets, wheelchairs or a trolley when available.
4. Raise the bed to a comfortable working height; remove obstacles and lock wheels.
5. Keep the load close, maintain a stable base and avoid twisting while lifting.
6. Coordinate the team with one leader and a clear count; stop if the plan becomes unsafe.
7. Report pain early and seek assessment rather than repeatedly working through injury.

4.7 Psychosocial hazards

Work stress becomes an OSH concern when demands chronically exceed resources or when workers experience violence, harassment, discrimination, lack of control or moral injury. Warning signs include persistent fatigue, irritability, sleep disturbance, withdrawal, errors, absenteeism and loss of empathy. Controls include adequate staffing, predictable rosters, protected breaks, respectful supervision, confidential support, violence-prevention procedures, debriefing after traumatic events and a fair system for raising concerns.

5.1 The continuous risk-management cycle

1. Prepare: define the task, work area, people involved, equipment and vulnerable groups such as pregnant workers, students or people with disabilities.
2. Identify hazards: walk through the work, observe behaviour, read labels and safety data, inspect equipment, review previous incidents and ask workers who perform the task.
3. Identify who may be harmed: workers, patients, visitors, cleaners, contractors, neighbours and the environment.
4. Describe exposure: route, frequency, duration, number of people, amount and existing barriers.
5. Assess likelihood: consider how often exposure occurs, how many people are exposed and whether controls are reliable.
6. Assess severity: consider first aid, serious injury, permanent disability, death, disease outbreak, property loss or environmental damage.
7. Determine risk: combine likelihood and severity; prioritise high and unacceptable risks first.
8. Select controls: use the hierarchy of controls and favour measures that protect everyone.
9. Implement and communicate: assign a responsible person, resources, time frame, training and emergency arrangements.
10. Monitor and review: inspect, measure, ask workers, review incidents and update the assessment after change, injury or a near miss.

5.2 A simple qualitative risk matrix

Important: a low-probability event can still be high priority when its consequence is catastrophic. Risk assessment is not a reason to accept a preventable hazard; it is a method for choosing the strongest practical control.

5.3 Useful sources of hazard information

• Direct observation and worker interviews.
• Safety data sheets, labels, equipment manuals and manufacturer instructions.
• Incident, injury, near-miss, sick-leave and occupational-disease records.
• Inspection checklists, environmental monitoring and health-surveillance results.
• Patient complaints, infection-prevention audits and emergency-drill evaluations.
• Changes in staffing, technology, chemicals, building layout, workload or service volume.

Controls are ranked from most reliable to least reliable. PPE is important, but it is the last line of defence and should never replace safer design.

7.1 Medical and health-service measures

• Pre-placement assessment focused on fitness and reasonable adjustment, not exclusion.
• Periodic or targeted examinations for radiation, noise, chemicals, respiratory hazards and other high-risk work.
• Immunisation, tuberculosis screening where indicated, respiratory protection and post-exposure follow-up.
• First aid, emergency referral, treatment, rehabilitation and safe return-to-work planning.
• Confidential counselling, mental-health support and fatigue management.
• Health education on nutrition, hydration, sanitation, communicable-disease control, reproductive health and substance misuse.
• Trend analysis of anonymised injuries, diseases, absenteeism and near misses.

7.2 Engineering and environmental measures

• Good building design, adequate floor and working space, safe surfaces, drainage and accessible routes.
• Ventilation and local exhaust for fumes, aerosols and heat; suitable lighting and noise control.
• Safe water, toilets, handwashing points, laundry, waste segregation and spill containment.
• Machine guards, electrical inspection, safe gas-cylinder storage, fire detection and clear exits.
• Mechanisation and lifting aids; adjustable beds, chairs, benches and computer workstations.
• Radiation shielding, warning signs, controlled areas and equipment maintenance.

7.3 Administrative measures

• A written OSH policy signed by leadership and communicated to every worker.
• Standard operating procedures, induction, refresher training, competency checks and supervision.
• Safe staffing and rosters, protected rest, job rotation and limits on excessive overtime.
• Permit-to-work systems for hot work, electrical work, confined spaces and maintenance.
• Signs, labels, security procedures, visitor control and emergency contact lists.
• Regular inspections, drills, safety-committee meetings and action tracking.
• A confidential, non-punitive incident and near-miss reporting system.

7.4 Personal protective equipment

Choose PPE after assessing the hazard, route and duration of exposure. It must fit, be compatible with other equipment, be available in appropriate sizes, be stored hygienically, be inspected and be replaced when damaged. Workers need demonstration and practice in putting on, removing, cleaning and disposing of PPE. Gloves do not replace hand hygiene; a mask is not automatically a respirator; and eye protection is needed whenever a splash, spray or projectile can reach the eyes.

8.1 Protecting life, health and dignity

Prevention avoids pain, disability, death, chronic disease and psychological trauma. It also protects the worker's income, family responsibilities and professional identity. A safe workplace respects people as human beings rather than treating injury as an unavoidable cost of employment.

8.2 Improving patient and service-user safety

An exhausted, injured, traumatised or infected health worker is more likely to make errors, miss precautions, be absent or leave the profession. Good lighting, safe equipment, adequate staffing, infection prevention, rest and clear emergency procedures improve both worker safety and patient safety. “Caring for the caregiver” is therefore a quality-of-care intervention.

8.3 Improving productivity and continuity

Injury and disease cause absenteeism, presenteeism, staff turnover, overtime, disrupted rosters and delayed services. Prevention keeps skilled workers at work, reduces downtime and protects institutional knowledge. It also reduces damage to buildings, vehicles, machines, medicines and laboratory specimens.

8.4 Legal, ethical and professional accountability

Employers have a duty to provide a safe system of work, information, training, supervision, welfare facilities and appropriate controls. Workers have duties to follow safe procedures, use equipment correctly, report hazards and protect colleagues and patients. Professional codes also require practitioners to avoid preventable harm and speak up when conditions are unsafe.

8.5 Financial and community benefits

• Fewer treatment, compensation, repair, legal and investigation costs.
• Less loss of staff time and fewer service interruptions.
• Better morale, recruitment, retention and public confidence.
• Reduced transmission of infection from workplace to household and community.
• Less pollution and safer disposal of chemicals, sharps and healthcare waste.

9.1 Employer or occupier

• Provide and maintain a workplace, plant, substances and systems of work that are safe and without risks to health.
• Identify hazards, assess risks, implement controls and review them after change or an incident.
• Provide information, instruction, training, supervision, PPE and welfare facilities without shifting the cost to workers.
• Arrange first aid, fire preparedness, emergency plans, health surveillance and incident reporting.
• Consult workers, support safety representatives/committees and investigate root causes without retaliation.

9.2 Supervisor and team leader

• Conduct a pre-task safety check and allocate competent staff.
• Demonstrate procedures, check PPE and stop unsafe work.
• Monitor fatigue, workload, violence, housekeeping and environmental controls.
• Respond immediately to incidents and ensure reporting, referral and corrective action.

9.3 Worker, student or volunteer

• Take reasonable care of personal safety and that of others who may be affected by actions or omissions.
• Follow safe work procedures, attend training and use equipment as instructed.
• Do not remove guards, misuse PPE, work while impaired or perform unfamiliar high-risk work without supervision.
• Report hazards, defective equipment, injuries, exposures, violence and near misses promptly.
• Participate in vaccination, health surveillance, emergency drills and safety discussions.
• Exercise a professional right to pause and seek help when a task presents an imminent serious risk.

9.4 Safety representatives and committees

They give workers a voice, inspect work areas, review incidents, monitor action plans, promote training and escalate unresolved hazards. They should be independent enough to raise concerns and must not become a substitute for management's legal responsibility.

9.5 Elements of a positive safety culture

• Visible leadership: managers allocate time, money and attention to prevention.
• Just culture: honest mistakes are examined for system causes; reckless or wilfully unsafe conduct is addressed fairly.
• Worker participation: those closest to the task help design controls.
• Learning culture: near misses and complaints generate action, not concealment.
• Equity and inclusion: controls work for women, pregnant workers, persons with disabilities, trainees and all cadres.

Uganda's principal workplace safety law is the Occupational Safety and Health Act, 2006 (Act No. 9), which replaced the former Factories Act and applies OSH requirements to workplaces and working environments in both public and private sectors. It sets duties relating to administration and inspection, employer and self-employed responsibilities, worker rights and responsibilities, workplace registration, health and welfare, general safety, fire preparedness, machinery, hazardous materials, chemicals, offences and enforcement.

The Workers' Compensation Act, 2000 provides a framework for compensation for injuries suffered and scheduled diseases incurred in the course of employment. Other labour and public-health instruments, institutional policies, professional standards and international ILO/WHO guidance also influence practice. Learners should consult the current official text and their institution's policies when applying legal provisions because laws and regulations may be amended.

The Ministry of Gender, Labour and Social Development (MGLSD) leads national OSH administration, inspection, surveillance and guidance. In a health facility, OSH works alongside the infection-prevention and control committee, human resources, occupational health service, safety committee, engineering/maintenance, laboratory, pharmacy, waste-management and emergency teams.

11.1 What a contingency plan should contain

• Likely emergencies: fire, explosion, chemical spill, needlestick, violence, collapse, power failure, flood and mass casualty.
• Alarm, communication and emergency contact procedures.
• Roles for first aid, evacuation, security, triage, utilities and family communication.
• Accessible exits, assembly points, fire equipment, spill kits, first-aid materials and backup power.
• Arrangements for children, patients with mobility or sensory disabilities, visitors and people requiring oxygen.
• Drills, review, documentation and corrective actions after every exercise or event.

11.2 Immediate response to any incident

1. Make the scene safe and prevent further exposure.
2. Call for help and provide immediate first aid within competence.
3. Isolate equipment, area or substance if this can be done safely.
4. Notify the supervisor/OSH focal person and arrange urgent clinical assessment.
5. Record factual details: what happened, where, when, task, people exposed, controls and witnesses.
6. Investigate underlying system causes and implement corrective action.
7. Share learning without exposing confidential patient or worker information.

Scenario 1: Recapped needle found on a ward trolley

Hazard: contaminated sharp; risk: puncture and blood-borne infection. Immediate action: prevent access, use forceps/tongs if safe, place in a nearby sharps container and report the near miss. System controls: eliminate recapping through training and supervision, place an approved container at point of use, ensure it is not overfilled, audit practice and provide post-exposure care.

Scenario 2: One porter lifting a dependent patient

Hazard: heavy, unpredictable load and awkward posture; risk: back injury and patient fall. Stop, explain, obtain more staff or a mechanical aid, lock the bed, clear the route and coordinate the move. The long-term control is safe staffing and equipment, not telling the porter to “be careful.”

Scenario 3: Chlorine splash during cleaning

Stop work, alert others, flush skin/eyes with running water, remove contaminated clothing, seek urgent assessment and report the exposure. Keep the product labelled, consult the safety data sheet, improve dilution and ventilation, provide a spill kit and never mix chlorine with acids or ammonia.

Scenario 4: Staff member becomes confused in a hot, crowded treatment room

Move the person to a cooler safe area, assess urgently, provide appropriate first aid and refer if heat illness is suspected. Investigate ventilation, water access, workload, protective clothing, rest breaks and staffing. Heat control is an engineering and work-organisation issue, not simply a matter of worker endurance.

Scenario 5: Verbal threats from a patient's relative

Do not manage violence alone. Maintain distance, use calm communication, call security/supervision, move patients and colleagues away, document the event and offer support. Review visitor control, staffing, communication, environmental escape routes and a zero-tolerance policy for violence.

Scenario 6: Fatigued night-duty student makes a medication near miss

Protect the patient, notify the clinical supervisor and document the near miss honestly. Do not shame the student. Review roster length, breaks, supervision, lighting, interruptions, handover and workload. A learning response prevents the same system failure from becoming harm.

• Writing that PPE is the first or only control; the hierarchy starts with elimination and safer design.
• Using “hazard” and “risk” as synonyms; hazard is the potential source, risk is likelihood plus consequence of exposure.
• Limiting occupational health to physical injury and forgetting mental, social and welfare dimensions.
• Blaming the worker without examining equipment, staffing, training, supervision and environment.
• Calling every illness an occupational disease; distinguish occupational disease from work-related disease.
• Forgetting contractors, students, cleaners, visitors and community members in the risk assessment.
• Ignoring near misses because nobody was injured; near misses are valuable prevention data.
• Confusing first aid with a complete OSH programme; first aid responds after harm while OSH prevents the event.

1. Define occupational health and explain its three dimensions.
2. Differentiate occupational safety, occupational health, occupational hygiene and welfare.
3. Define hazard, exposure, risk, accident, incident and near miss using one health-facility example for each.
4. Explain the source–pathway–person model of exposure.
5. Classify ten hazards found in an emergency department and state one possible harm for each.
6. Describe the four action words in the OSH definition: anticipation, recognition, evaluation and control.
7. Explain the five levels of the hierarchy of controls and apply them to a needlestick hazard.
8. Describe the steps of a workplace risk assessment.
9. Discuss the functions of an occupational health service.
10. Explain how OSH improves patient safety and staff retention.
11. Discuss the duties of an employer, supervisor, worker and safety committee.
12. Describe immediate and follow-up actions after occupational exposure to blood.
13. Explain how heat, noise, vibration, light and radiation affect workers.
14. Discuss chemical routes of entry and precautions for disinfectants.
15. Explain ergonomic risks in patient handling and measures to prevent back injury.
16. Describe psychosocial hazards and practical controls for burnout and workplace violence.
17. Outline the main OSH legal and institutional framework in Uganda.
18. Why should near misses be reported even when no one is injured?
19. Develop a contingency plan for fire, chemical spill or mass casualty in a health facility.
20. Using a scenario, show how a just safety culture differs from blame.

• Occupational Health and Safety (70-slide presentation)
• Occupational Health Related Legislation (Uganda-focused presentation)
• Practice Occupational Health and Safety Procedures
• World Health Organization: Occupational health
• International Labour Organization: Safety and health at work
• Uganda Ministry of Gender, Labour and Social Development: OSH information system
• Uganda MGLSD: Occupational Safety and Health
• Uganda Occupational Safety and Health Act, 2006

Prepared for Nurses Revision Uganda learners. Always follow the current institutional policy, supervisor's direction and the current official Ugandan law when applying these notes in practice.