CONO Clinical Sciences study materials
CONO Clinical Sciences study resources

CONO Clinical Sciences key terms

CONO Clinical Sciences · Get comfortable with the vocabulary.

Differential Diagnosis

A systematic process of listing and comparing possible conditions that could explain a patient's symptoms, then using evidence to narrow the list toward the most likely diagnosis.

Related: Clinical Reasoning, Diagnostic Error
Clinical Reasoning

The cognitive process clinicians use to gather and interpret data, weigh alternatives, and decide on diagnoses and management plans, integrating knowledge with patient-specific information.

Related: Differential Diagnosis, Diagnostic Error
Diagnostic Error

A missed, delayed, or incorrect diagnosis that harms the patient or delays appropriate care, often resulting from cognitive biases, system failures, or incomplete information gathering.

Related: Clinical Reasoning, Differential Diagnosis
Red Flag

A clinical finding or history feature that raises concern for a serious underlying condition, prompting urgent evaluation or escalation of care rather than routine management.

Related: Triage, Emergency Severity Index
Sensitivity

The proportion of people who truly have a condition and are correctly identified by a test as positive; a highly sensitive test is useful for ruling out disease when negative.

Related: Specificity, Predictive Value
Specificity

The proportion of people who do not have a condition and are correctly identified by a test as negative; a highly specific test is useful for ruling in disease when positive.

Related: Sensitivity, Predictive Value
Predictive Value

The probability that a positive or negative test result correctly reflects the presence or absence of disease in a given population, depending strongly on disease prevalence.

Related: Sensitivity, Specificity
Number Needed to Treat

The number of patients who must receive an intervention for one additional patient to benefit, calculated as the reciprocal of the absolute risk reduction.

Related: Absolute Risk Reduction, Confidence Interval
Absolute Risk Reduction

The arithmetic difference in event rates between a control group and a treated group, expressed as a percentage or proportion, reflecting the actual clinical benefit of an intervention.

Related: Number Needed to Treat, Confidence Interval
Confidence Interval

A range of values calculated from sample data that likely contains the true population parameter, usually expressed with a stated level of confidence such as 95%.

Related: Number Needed to Treat, Systematic Review
Systematic Review

A structured, comprehensive synthesis of all relevant studies addressing a focused question, using explicit methods to search, appraise, and combine evidence to reduce bias.

Related: Meta-Analysis, Confidence Interval
Meta-Analysis

A statistical technique that combines results from multiple independent studies to produce a pooled estimate of effect, increasing precision and power when studies are sufficiently similar.

Related: Systematic Review, Heterogeneity
Heterogeneity

Variation in study results or populations beyond what would be expected by chance, which may make pooling data inappropriate and requires exploration of sources of difference.

Related: Meta-Analysis, Systematic Review
Informed Consent

A patient's voluntary agreement to a treatment or procedure after receiving and understanding information about its purpose, risks, benefits, and alternatives, and having the capacity to decide.

Related: Decision-Making Capacity, Advance Directive
Decision-Making Capacity

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

Related: Informed Consent, Advance Directive
Advance Directive

A legal document in which a person states their preferences for future medical care or appoints someone to decide on their behalf if they lose decision-making capacity.

Related: Informed Consent, Decision-Making Capacity
Confidentiality

The ethical and legal obligation to protect a patient's private health information from unauthorized disclosure, with limited exceptions such as imminent harm or legally required reporting.

Related: HIPAA Privacy Rule, Mandatory Reporting
Mandatory Reporting

A legal requirement for clinicians to report certain conditions or events, such as suspected child abuse, communicable diseases, or gunshot wounds, to designated authorities.

Related: Confidentiality, HIPAA Privacy Rule
Scope of Practice

The range of roles, activities, and responsibilities that a healthcare professional is legally and ethically permitted to perform based on licensure, training, and regulatory standards.

Related: Delegation, Standard of Care
Standard of Care

The degree of care and skill that a reasonably prudent clinician with similar training would provide under similar circumstances, used as a legal benchmark in malpractice claims.

Related: Scope of Practice, Negligence
Negligence

Failure to exercise the standard of care that a reasonably prudent professional would use, resulting in harm; proving it requires duty, breach, causation, and damages.

Related: Standard of Care, Scope of Practice
Pharmacokinetics

The study of how the body affects a drug over time, encompassing absorption, distribution, metabolism, and excretion, which together determine drug concentration at sites of action.

Related: Pharmacodynamics, Therapeutic Index
Pharmacodynamics

The study of how a drug affects the body, including receptor interactions, dose-response relationships, and mechanisms of therapeutic and adverse effects.

Related: Pharmacokinetics, Therapeutic Index
Therapeutic Index

A ratio comparing the dose that produces toxicity to the dose that produces a therapeutic effect; a narrow index means small dose changes can cause harm.

Related: Pharmacokinetics, Pharmacodynamics
Adverse Drug Reaction

An unintended, harmful response to a medication occurring at doses normally used for treatment, which may require dose adjustment, discontinuation, or reporting to safety systems.

Related: Drug Interaction, Polypharmacy
Drug Interaction

A change in a drug's effect caused by another drug, food, or substance, which can increase toxicity or reduce efficacy and often requires monitoring or dose adjustment.

Related: Adverse Drug Reaction, Polypharmacy
Polypharmacy

The concurrent use of multiple medications by a patient, which raises the risk of interactions, adverse effects, and medication errors, especially in older adults.

Related: Drug Interaction, Adverse Drug Reaction
Triage

A process of rapidly sorting patients by urgency of need so that limited resources are directed first to those with life-threatening or time-sensitive conditions.

Related: Emergency Severity Index, Red Flag
Emergency Severity Index

A five-level triage scale used in emergency departments that assigns acuity based on illness severity and expected resource needs, guiding patient prioritization and flow.

Related: Triage, Red Flag
Handoff Communication

The transfer of patient information and responsibility between clinicians or settings, ideally using a structured format to ensure accuracy and prevent omissions that could harm patients.

Related: SBAR, Closed-Loop Communication
SBAR

A structured communication tool standing for Situation, Background, Assessment, and Recommendation, used to convey patient information clearly and efficiently during handoffs or escalations.

Related: Handoff Communication, Closed-Loop Communication
Closed-Loop Communication

A communication technique in which the receiver repeats back the message to confirm understanding, reducing errors in high-stakes settings such as emergency care and medication orders.

Related: SBAR, Handoff Communication
Delegation

The assignment of a task to another team member while retaining accountability for the outcome, requiring that the task be within the delegate's scope and competence.

Related: Scope of Practice, Handoff Communication
Health Literacy

A person's ability to obtain, understand, and use health information to make informed decisions, which influences communication strategies and adherence to treatment plans.

Related: Patient Education, Teach-Back Method
Teach-Back Method

A communication technique in which patients explain information in their own words to confirm understanding, allowing clinicians to correct misunderstandings and improve education effectiveness.

Related: Health Literacy, Patient Education
Patient Education

A planned process of providing information and skills to help patients manage their health, understand treatments, and make informed decisions, tailored to their needs and literacy level.

Related: Health Literacy, Teach-Back Method
HIPAA Privacy Rule

A federal regulation that sets national standards for protecting individuals' medical records and other personal health information, governing use and disclosure by covered entities.

Related: Confidentiality, Mandatory Reporting
Clinical Documentation

The systematic recording of patient care in the medical record, including assessments, interventions, and outcomes, serving legal, clinical, and quality purposes.

Related: HIPAA Privacy Rule, Health Informatics
Health Informatics

The interdisciplinary field that applies information technology and data science to healthcare to improve documentation, decision support, communication, and patient outcomes.

Related: Clinical Documentation, Clinical Decision Support
Clinical Decision Support

Electronic tools that provide clinicians with knowledge and patient-specific information at the point of care to enhance decisions, such as alerts, guidelines, and order sets.

Related: Health Informatics, Clinical Documentation