NPE key terms

A ranked list of possible conditions that could explain a patient's symptoms, ordered by likelihood and seriousness, then narrowed through focused history, exam, and testing before a working diagnosis is confirmed.

Structured questioning that targets the chief complaint, its onset, duration, severity, associated symptoms, and modifying factors, while also capturing pertinent past history, medications, allergies, and social context.

A mnemonic for symptom characterization: onset, location, duration, character, aggravating and alleviating factors, radiation, timing, and severity. It produces a complete symptom description that supports accurate differential diagnosis.

A systematic head-to-toe inquiry about symptoms across body systems, used to uncover problems the patient has not volunteered and to screen for conditions suggested by the chief complaint.

A symptom, sign, or history element that signals possible serious or life-threatening disease and mandates urgent evaluation or referral rather than routine management or watchful waiting.

The cognitive process of integrating history, physical findings, and test results with knowledge of disease prevalence to form, test, and revise diagnostic hypotheses over the course of a patient encounter.

The estimated likelihood that a patient has a given condition before a diagnostic test is performed, based on history, exam, and population prevalence; it determines how much a test result can change management.

Sensitivity is the proportion of people with disease who test positive; specificity is the proportion without disease who test negative. Together they describe a test's intrinsic accuracy independent of how common the disease is.

The probability that a person with a positive test result actually has the disease. It rises as disease prevalence in the tested population rises, so the same test performs differently across settings.

How the body handles a drug over time, encompassing absorption, distribution, metabolism, and elimination. These processes determine the concentration of drug reaching target tissues and the dosing interval needed.

How a drug affects the body, including receptor binding, agonist or antagonist action, dose-response relationships, and the mechanisms that produce both intended effects and adverse reactions.

The time required for the plasma concentration of a drug to fall by half. It guides dosing frequency and predicts how many doses are needed to reach steady state.

The condition in which drug intake equals drug elimination, producing stable plasma concentrations. It is generally reached after about four to five half-lives of consistent dosing.

The ratio between a drug's toxic dose and its effective dose. A narrow index means small dose changes or interactions can cause toxicity, so monitoring and careful titration are required.

Measuring serum drug concentrations at defined times to individualize dosing for drugs with narrow therapeutic indices or unpredictable pharmacokinetics, such as certain anticonvulsants, lithium, and aminoglycosides.

Any injury or harmful outcome associated with medication use, including predictable side effects, dose-related toxicity, allergic reactions, and errors in prescribing, dispensing, or administration.

A change in a drug's effect caused by another drug, food, supplement, or disease state, often through altered metabolism, protein binding, or additive pharmacologic action.

A family of liver enzymes that metabolize most drugs. Inhibition raises levels of substrate drugs and toxicity risk, while induction lowers levels and can cause treatment failure.

Use of multiple medications concurrently, commonly five or more, which raises the risk of interactions, adverse events, duplication, and nonadherence, particularly in older adults with several chronic conditions.

An evidence-based list of medications potentially inappropriate for older adults because of high risk of adverse effects, drug interactions, or limited benefit, used to guide safer prescribing and review.

The systematic, supervised process of reducing or stopping medications that no longer provide benefit, are causing harm, or conflict with the patient's goals of care.

A test applied to asymptomatic people to detect disease early, when treatment is more effective. It requires a condition with meaningful prevalence, an acceptable test, and evidence that early detection improves outcomes.

The recommended timing and sequence of vaccines across the lifespan, adjusted for age, health status, pregnancy, occupation, and travel, with catch-up guidance for missed doses.

A person's capacity to obtain, process, and understand basic health information to make informed decisions. Low health literacy calls for plain language, teach-back, and simplified instructions.

A communication technique in which the patient explains information in their own words, allowing the clinician to confirm understanding and correct misunderstandings before the visit ends.

Planned, individualized teaching about a condition, treatment, or self-care behavior, delivered in a way that matches the patient's literacy, culture, language, and readiness to change.

A collaborative, goal-directed counseling style that explores and strengthens a patient's own reasons for change, using open questions, reflective listening, and affirmation rather than advice-giving or confrontation.

A process in which clinician and patient exchange information about options, benefits, and risks, then agree on a plan consistent with the patient's values and preferences.

A patient's voluntary agreement to a treatment or procedure after receiving and understanding information about its nature, risks, benefits, and alternatives, and after confirming decision-making capacity.

A patient's clinical ability to understand relevant information, appreciate the consequences of choices, reason about options, and communicate a consistent decision about their own care.

The professional and legal duty to protect patient information from unauthorized disclosure, subject to defined exceptions such as imminent harm, reportable diseases, or court order.

A federal regulation setting national standards for protecting individually identifiable health information and defining permitted uses and disclosures, including required patient rights and safeguards.

The range of activities, procedures, and decisions a clinician is legally authorized to perform under state licensure, certification, and delegation rules, including supervision and collaborative agreement requirements.

The degree of care and skill that a reasonably prudent clinician with similar training would provide in similar circumstances; it is the benchmark for evaluating negligence claims.

A written statement, such as a living will or durable power of attorney for health care, expressing a person's treatment preferences or naming a surrogate to decide if the person loses capacity.

The deliberate organization of patient care activities among providers and settings to share information, avoid duplication, and ensure safe transitions across primary, specialty, and hospital care.

Time-limited, coordinated actions that ensure continuity and safety as patients move between settings, including medication reconciliation, discharge instructions, and timely follow-up contact.

A formal process of comparing a patient's complete medication list across care transitions to identify omissions, duplications, and dosing errors, then documenting an accurate current list.

Defined clinical thresholds and circumstances that indicate a patient needs specialist evaluation, higher-level care, or urgent escalation, supporting timely and appropriate handoff.

The conditions in which people are born, grow, work, and age, such as income, housing, food security, education, and transportation, that shape health outcomes and access to care.

The ability to understand and respond respectfully to patients' cultural beliefs, values, language, and practices, adapting communication and care plans to improve trust and outcomes.

The principle of ensuring everyone has a fair opportunity to reach their best health, which requires removing avoidable barriers and allocating resources according to need rather than equally.

Trained professionals who convey meaning accurately between clinician and patient in different languages; using them, rather than family members, improves safety, confidentiality, and informed consent.

The systematic application of a test or inquiry to identify unrecognized disease or risk in a population, followed by diagnostic evaluation and intervention for those who screen positive.