Foundations of Modern Nursing

Scope of Practice

The legal and professional boundaries that define what a particular health professional (e.g., CNA, LPN/LVN, RN, APRN) is permitted and competent to do, based on education, licensure, and regulation.

Registered Nurse (RN)

A nurse who has completed an approved nursing program (usually associate or bachelor’s degree) and passed a licensure exam, authorized to provide comprehensive nursing assessment, planning, implementation, evaluation, and coordination of care.

Advanced Practice Registered Nurse (APRN)

A nurse with graduate-level education and advanced certification (e.g., NP, CNS, CNM, CRNA) who provides advanced clinical care; in many jurisdictions can diagnose, order tests, and prescribe within their specialty.

Advocacy in Nursing

Actively protecting and promoting the rights, preferences, and safety of patients, families, and communities—often by speaking up, clarifying information, and challenging unsafe or unfair practices.

Patient Outcomes

Measurable results of healthcare, such as symptom control, complication rates, hospital readmissions, mortality, functional status, and patient satisfaction—nursing care has a well-documented impact on these outcomes.

Public Health Nursing

A field of nursing focused on populations and communities rather than only individuals, emphasizing prevention, health promotion, and addressing social determinants of health.

Assessment

The systematic collection, verification, and organization of subjective and objective data about the patient’s health status. It is ongoing and holistic.

Nursing Diagnosis

A clinical judgment about a patient’s response to actual or potential health problems, forming the basis for nursing interventions. Often written in PES format: Problem–Etiology–Signs/Symptoms.

Prioritization (ABCs)

A method for choosing which nursing problems to address first, focusing on Airway, Breathing, and Circulation, followed by safety and other needs.

Planning (SMART Goal)

The step where nurses set Specific, Measurable, Achievable, Realistic/Relevant, and Time‑bound outcomes and select appropriate nursing interventions.

Implementation

The phase where nurses carry out the planned interventions, including direct care, education, coordination, and documentation of actions and patient responses.

Evaluation

The step where nurses determine whether goals were met, partially met, or not met, using observable data, and then continue, modify, or end the care plan.

Homeostasis

The body’s ability to maintain a stable internal environment (e.g., temperature, pH, fluid balance) within narrow limits despite external changes.

Perfusion

The flow of blood through the body’s tissues, delivering oxygen and nutrients and removing waste. Clinically assessed by BP, mental status, skin signs, and urine output.

Cardiac Output (CO)

The volume of blood the heart pumps per minute. Calculated as heart rate × stroke volume. A major determinant of blood pressure and organ perfusion.

Ventilation vs. Oxygenation

Ventilation is the movement of air in and out of the lungs. Oxygenation is the process of getting oxygen into the blood. A patient can have good oxygenation (normal SpO₂) but poor ventilation (e.g., high CO₂).

Level of Consciousness (LOC)

A measure of a patient’s awareness of self and environment, ranging from alert to unresponsive. Acute changes in LOC are clinical emergencies.

Oliguria

Abnormally low urine output. In adults, often defined as less than about 0.5 mL/kg/hr (check local policy). Can indicate low renal perfusion or acute kidney injury.

Typical adult resting respiratory rate (conceptual range)

About **12–20 breaths per minute** at rest for a healthy adult.

Why are trends in vital signs more important than single readings?

Because **progressive changes over time** (e.g., rising HR and RR, falling BP and SpO₂) can reveal **early deterioration** even when individual values are only mildly abnormal.

SpO₂ (oxygen saturation)

A non-invasive estimate of the **percentage of hemoglobin saturated with oxygen**, measured by pulse oximetry. Typical adult values on room air are **≥95%**, but target ranges depend on the patient and provider orders.

General components of a quick head-to-toe assessment

**General survey, neurological, respiratory, cardiovascular, gastrointestinal, genitourinary, musculoskeletal/skin, and lines/tubes/safety.**

OPQRST pain assessment

A pain assessment framework: **Onset, Provocation/Palliation, Quality, Region/Radiation, Severity, Timing**.

Two early vital sign indicators of clinical deterioration

A **rising respiratory rate** and **increasing heart rate** are often among the earliest warning signs of deterioration (e.g., sepsis, shock, respiratory failure).

Standard precautions

The minimum infection prevention practices applied to ALL patient care, regardless of suspected or confirmed infection status (e.g., hand hygiene, risk-based PPE, respiratory hygiene, safe injection, equipment and environmental cleaning).

Transmission-based precautions

Additional infection control measures used for patients with known or suspected infections that are spread by specific routes (contact, droplet, airborne), implemented on top of standard precautions.

Contact precautions

Precautions used for infections spread by direct or indirect contact (e.g., MRSA, C. difficile), typically including gloves and gown upon room entry and dedicated/disinfected equipment.

Droplet precautions

Precautions for infections transmitted by large respiratory droplets (e.g., influenza), typically including a surgical/medical mask for staff within close distance and masking the patient during transport.

Airborne precautions

Precautions for infections transmitted via small airborne particles that remain suspended in air (e.g., TB, measles), typically including a fit-tested respirator and an airborne infection isolation (negative pressure) room when available.

Chain of infection

A model describing how infection spreads through six links: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.

Therapeutic communication

A purposeful, goal-directed, patient-centered form of communication used to support health, coping, and decision-making, while maintaining professional boundaries.

Social communication

Casual, reciprocal conversation focused on mutual enjoyment or connection, not specifically on clinical goals or the patient’s care needs.

Active listening

A communication approach where the nurse is fully present, using techniques like minimal encouragers, open-ended questions, paraphrasing, reflection of feelings, and summarizing.

Open-ended question

A question that cannot be answered with just “yes” or “no,” inviting the patient to describe experiences, feelings, or concerns in their own words.

Reflection of feelings

An active listening technique where the nurse names or mirrors the patient’s emotions to show understanding and invite deeper exploration.

Patient-centered care

An approach that respects and responds to individual patient preferences, needs, and values, ensuring that patient values guide all clinical decisions.

Autonomy

The patient’s right to make informed, voluntary decisions about their own care, provided they have capacity and adequate information.

Beneficence

The ethical duty to act in the patient’s best interests and promote their well-being.

Nonmaleficence

The duty to avoid causing harm; often summarized as “first, do no harm.”

Justice

Fair and equitable treatment of patients, including fair distribution of resources and non-discrimination.

Confidentiality

The obligation to protect patient information from unauthorized access or disclosure, in line with professional codes and current privacy laws.

Informed consent

A process by which a patient with capacity voluntarily agrees to an intervention after receiving and understanding adequate information about risks, benefits, and alternatives.

Patient safety culture

The shared values, beliefs, and behaviors in a healthcare setting that prioritize preventing harm to patients, encouraging reporting, and focusing on system improvement rather than blame.

Just culture

An approach that distinguishes between human error, at-risk behavior, and reckless behavior, aiming to be fair and to improve systems while still holding people accountable for truly reckless acts.

Medication rights (modern view)

A set of standardized checks (e.g., right patient, medication, dose, route, time, documentation, reason, response) used to reduce medication errors and promote safe administration.

Closed-loop communication

A communication pattern where the receiver repeats back key information and the sender confirms it, reducing misunderstandings and errors.

SBAR

A structured communication tool (Situation, Background, Assessment, Recommendation) used for clear, concise information exchange, especially during handoffs or when escalating concerns.

Near miss

An event that could have caused harm but did not, either by chance or timely intervention; still important to report and analyze for system learning.

Evidence-Based Practice (EBP)

A decision-making approach that integrates the best available research evidence, clinical expertise, and the patient’s values, preferences, and context to provide safe, effective, and equitable care.

Cultural Competence

The ability of healthcare professionals and systems to effectively deliver care that meets the social, cultural, and linguistic needs of patients from diverse backgrounds.

Cultural Humility

A lifelong process of self-reflection and self-critique in which clinicians recognize their own biases and power, view patients as experts in their own lives, and remain open to learning from every encounter.

Health Disparities

Systematic, avoidable, and unjust differences in health outcomes or health care access between groups, often linked to social, economic, or environmental disadvantage.

Social Determinants of Health (SDOH)

Non-medical factors that influence health outcomes, such as income, education, employment, housing, neighborhood conditions, discrimination, and access to transportation and nutritious food.

Teach-Back Method

A communication technique where the clinician asks the patient to explain the information or instructions in their own words, to confirm understanding and correct misunderstandings.

Stress

A normal physical and emotional response to demands or threats; can be helpful short term but harmful when chronic and unmanaged.

Compassion Fatigue

Emotional and physical exhaustion leading to a reduced ability to empathize or feel compassion for others, often called the “cost of caring.”

Burnout

A work-related syndrome involving emotional exhaustion, depersonalization/cynicism, and reduced personal accomplishment due to chronic workplace stress.

Resilience

The ability to adapt and recover from stress, challenges, or adversity, often strengthened through skills, supports, and experience.

Micro-recovery

Very short (seconds to minutes) breaks or practices that help the body and mind reset during a work shift.

Moral Distress

The feeling of knowing the ethically appropriate action to take but being unable to act due to constraints, common in complex care situations.