nursing exam 1
Week One
Definitions:
Pharmacology: The scientific study of drugs, including their composition, effects, and interactions with living organisms.
Therapeutics: The branch of medicine concerned with the treatment of diseases and the practice of medicine.
Pharmacotherapy: The use of drugs to treat or manage disease, focusing on the application of pharmacological principles to clinical practice.
Classifications of Therapeutic Agents:
Prescription Drugs: Medications that require a doctor’s prescription due to their potential risks and complexities in use.
Over-the-Counter (OTC) Drugs: Medications available without a prescription, generally considered safe for use without professional supervision.
Herbal Remedies: Natural products derived from plants used for therapeutic purposes.
Dietary Supplements: Products taken orally that contain dietary ingredients intended to supplement the diet (e.g., vitamins, minerals).
Drug Classifications:
Therapeutic Classification: Based on the therapeutic effect of the drug (e.g., antihypertensives for lowering blood pressure).
Pharmacologic Classification: Based on the drug’s mechanism of action or its effect on the body’s systems (e.g., beta-blockers affecting heart rate).
Over-the-Counter (OTC): Medications available without a prescription, used for minor health issues.
Prescription: Medications requiring a healthcare provider’s prescription due to their potential for misuse or serious side effects.
Prototype: A well-understood drug that serves as a standard for comparison within a drug class (e.g., morphine as a prototype opioid).
Pharmacokinetic Terms:
Bioavailability: The fraction of an administered dose of a drug that reaches the systemic circulation in an active form.
Half-life: The time required for the concentration of a drug in the bloodstream to decrease by half.
Onset of Action: The time it takes for a drug to start producing its effects after administration.
Therapeutic Range: The plasma drug concentration range between the minimum effective concentration and the minimum toxic concentration.
Peak: The highest concentration of a drug in the blood after administration.
Duration: The length of time that a drug’s therapeutic effect lasts.
Toxic Level: The concentration of a drug at which it causes adverse or harmful effects.
Pharmacoeconomic vs. Risk-Benefit Ratio:
Pharmacoeconomic: Evaluates the cost-effectiveness of drugs, considering factors like cost per benefit, cost of treatment versus benefit, and overall economic impact.
Risk-Benefit Ratio: Assesses the advantages of a drug in treating a condition against the risks and potential side effects of the drug.
Definitions:
Prescriptive Authority: The legal right and responsibility of healthcare providers to prescribe medications.
Dependence: A condition where a person develops a physical or psychological reliance on a drug, often requiring it to function normally.
Withdrawal: Symptoms experienced when a person stops using a drug they are dependent on.
Controlled Substances and Drug Schedules: Classification of drugs into schedules (I-V) based on their potential for abuse and medical use. Schedule I drugs have the highest potential for abuse and no accepted medical use (e.g., heroin), while Schedule V drugs have the lowest potential for abuse (e.g., some cough preparations).
Teratogenic Risk and Pregnancy Risk Categories: The risk a drug poses to fetal development. Categories range from A (no risk) to X (contraindicated in pregnancy).
Principles of Drug Administration:
Correct Drug: Verify the medication to ensure it is the right one for the patient.
Correct Dose: Ensure the dose is accurate and appropriate for the patient’s condition.
Correct Route: Administer the drug via the proper route (oral, IV, etc.).
Correct Time: Administer the drug at the prescribed time intervals.
Correct Patient: Verify patient identity to prevent medication errors.
Routes of Drug Administration:
Enteral: Drugs are absorbed through the digestive tract. Common routes include oral (by mouth) and rectal (through the rectum).
Parenteral: Drugs are administered through routes other than the digestive tract, typically by injection (e.g., intravenous, intramuscular).
Topical: Drugs are applied directly to a specific area of the skin or mucous membranes (e.g., creams, patches).
Five Rights of Drug Administration:
Right Drug: The medication administered should be the one prescribed.
Right Dose: The amount of medication administered should be accurate.
Right Route: The method of administration should be as prescribed.
Right Time: Medication should be administered at the correct time and frequency.
Right Patient: The medication should be given to the correct patient.
Active Transport vs. Diffusion:
Active Transport: Requires energy (usually ATP) to move substances against their concentration gradient (e.g., sodium-potassium pump).
Diffusion: A passive process where substances move from an area of higher concentration to an area of lower concentration without energy expenditure (e.g., oxygen entering cells).
Pharmacokinetic Processes:
Absorption: The process by which a drug enters the bloodstream from the site of administration. Involves the gastrointestinal system for oral drugs and blood vessels for injections.
Distribution: The dispersion or spreading of substances throughout the fluids and tissues of the body. Mainly involves the circulatory system.
Metabolism: The chemical modification made by an organism on a chemical compound. Primarily occurs in the liver.
Excretion: The process of removing drugs and metabolites from the body, mainly via the kidneys through urine.
Loading Dose vs. Maintenance Dose:
Loading Dose: A higher initial dose of a drug given to rapidly achieve therapeutic levels in the bloodstream.
Maintenance Dose: The dose required to keep the drug concentration within the therapeutic range after the loading dose has been administered.
Therapeutic Index:
Answer: The ratio of the toxic dose to the therapeutic dose of a drug. A higher therapeutic index indicates a wider margin of safety between the effective and toxic doses.
Definitions:
Pharmacodynamics: The study of how drugs interact with cellular receptors and the subsequent effects on the body.
Antagonist: A substance that binds to a receptor and blocks or inhibits a response.
Partial Agonist: A drug that activates a receptor but produces a sub-maximal effect compared to a full agonist.
Agonist: A substance that binds to a receptor and activates it, producing a physiological response.
Week Two
Nursing Process Steps:
Assessment: Collecting and analyzing patient data to identify health needs.
Diagnosis: Formulating clinical judgments based on the assessment data.
Planning: Developing a plan of care with specific goals and interventions.
Implementation: Executing the care plan and interventions.
Evaluation: Assessing the effectiveness of the care plan and making adjustments as needed.
Types of Assessment Data:
Subjective Data: Information provided by the patient, including symptoms and personal experiences (e.g., pain levels, feelings of nausea).
Objective Data: Observable and measurable data collected through physical examination, laboratory tests, and diagnostic imaging (e.g., blood pressure readings, lab results).
Patient/Medical History Components:
Personal Information: Name, age, gender, and contact details.
Medical History: Previous illnesses, surgeries, hospitalizations, and current medical conditions.
Medications: Current and past medications, including dosages and duration.
Allergies: Known allergies to medications, foods, or other substances.
Family History: Health conditions of family members that might affect the patient’s health.
Social History: Lifestyle factors, including smoking, alcohol use, occupation, and living conditions.
Nursing vs. Medical Diagnoses:
Nursing Diagnosis: Focuses on patient responses to health conditions or life processes and is used to guide nursing interventions (e.g., impaired mobility).
Medical Diagnosis: Identifies the specific disease or condition affecting the patient and guides medical treatment (e.g., diabetes mellitus).
Planning Step Components:
Goals: Specific, measurable objectives the patient aims to achieve (e.g., reducing blood glucose levels to a target range).
Interventions: Specific actions or treatments to achieve the goals (e.g., administering insulin, providing dietary counseling).
Outcomes: Expected results of the interventions, used to evaluate the effectiveness of the care plan.
Implementation and Evaluation:
Implementation: Carrying out the planned interventions, including administering medications, performing procedures, and providing patient education.
Evaluation: Reviewing the patient’s progress toward the goals and assessing whether the interventions were effective, making necessary adjustments to the care plan.
Medication Error Factors:
Common Errors: Incorrect dosages, wrong medication, improper administration techniques, and lack of patient information.
Prevention: Double-checking orders, using technology (e.g., electronic medication administration records), and clear communication among healthcare providers.
Limitation in Medication Error Data:
Answer: Incomplete reporting and underreporting of medication errors, which hinders accurate data collection and analysis.
Strategies for Reducing Errors:
Standardization: Implementing protocols and checklists to reduce variability and errors.
Education: Providing ongoing training and education for healthcare providers on safe medication practices.
Technology: Utilizing electronic health records and barcoding systems to minimize human errors.
Medication Management in Pregnant/Lactating Patients:
Considerations: Assessing the risk of medications to the developing fetus or breastfeeding infant, and using drugs that are known to be safe during pregnancy and lactation.
Placental Effects:
Answer: The placenta can act as a barrier but also allows for the transfer of drugs from the mother to the fetus, affecting drug levels and potential effects on fetal development.
Pregnancy Gestation Periods:
First Trimester: Critical for organ formation and development. Greatest risk for teratogenic effects from drugs.
Second Trimester: Period of growth and further development; drugs can affect growth and development.
Third Trimester: Fetal growth continues; drugs can impact birth weight and neonatal health.
Medication Categorization in Pregnancy:
Categories:
Category A: No risk to the fetus in any trimester.
Category B: No evidence of risk in humans; animal studies may show risk.
Category C: Risk cannot be ruled out; benefits may outweigh risks.
Category D: Positive evidence of risk; benefits may outweigh risks in serious conditions.
Category X: Contraindicated in pregnancy; risks outweigh benefits.
Developmental Factors in Pediatrics:
Age-Specific Considerations: Dosing adjustments based on weight, age, and developmental stage. Pediatric patients metabolize drugs differently compared to adults.
Pharmacokinetic Variations:
Pediatric: Increased metabolic rate; dosing adjustments required.
Pregnant: Altered drug metabolism and clearance; increased dosing may be necessary.
Older Adults: Decreased metabolism and renal function; increased risk of adverse effects and need for dose adjustments.
Holistic Pharmacotherapy Considerations:
Comprehensive Approach: Integrates the patient’s physical, emotional, and social well-being into treatment plans, considering their lifestyle and preferences.
Ethnicity vs. Culture:
Ethnicity: Refers to shared ancestry and genetic traits among a group of people.
Culture: Refers to shared beliefs, practices, and values, which influence health behaviors and attitudes.
Pharmacogenetics:
Answer: The study of how genetic variations affect individual responses to drugs, including efficacy and risk of adverse effects.
Genetic Polymorphism:
Answer: Variations in genes that lead to different enzymatic activities affecting drug metabolism, such as variations in CYP450 enzymes.
Week Three
Complementary, Alternative, Integrative Medicine:
Complementary: Used alongside conventional medicine (e.g., acupuncture for pain relief).
Alternative: Used instead of conventional medicine (e.g., herbal remedies for treating colds).
Integrative: Combines conventional and complementary approaches to enhance overall care (e.g., combining yoga with physical therapy).
Natural Products and Mind/Body Practices:
Natural Products: Includes herbs (e.g., echinacea), vitamins (e.g., vitamin C), and minerals (e.g., magnesium).
Mind/Body Practices: Techniques aimed at improving mental and physical health (e.g., mindfulness meditation, tai chi).
Homeopathy vs. Naturopathy:
Homeopathy: Uses extremely diluted substances to stimulate the body’s healing processes based on the principle of "like cures like."
Naturopathy: Emphasizes natural remedies and lifestyle changes to support the body’s ability to heal itself, incorporating various treatments including herbal medicine, nutrition, and physical therapies.
Regulatory Bodies:
Medications: Regulated by the FDA (Food and Drug Administration) with rigorous testing and approval processes.
Supplements/Herbal Products: Regulated less strictly by the FDA; less evidence is required for efficacy and safety, leading to variable quality and efficacy.
Asking About Supplements:
Rationale: To identify potential interactions with prescribed medications, assess overall health practices, and ensure the patient’s safety.
Definitions:
Epidemic: An outbreak of a disease affecting many individuals in a community or population.
Pandemic: An epidemic that spreads across multiple countries or continents.
Bioterrorism: The intentional release of viruses, bacteria, or other pathogens to cause harm and spread fear.
Nursing Actions in Infection Control:
Actions: Proper hand hygiene, use of personal protective equipment (PPE), adherence to infection control protocols, and vaccination.
Agents Used in Bioterrorism:
Examples: Anthrax (bacterial), smallpox (viral), ricin (toxin).
Medical Management of Poisonings:
Prioritization: Immediate assessment, stabilization of the patient, and administration of appropriate antidotes or treatments.
Antidotes for Poisonings:
Warfarin: Vitamin K.
Acetylcysteine: Acetaminophen toxicity.
Donepezil: Atropine (for cholinergic crisis).
Lead Poisoning: Chelating agents like EDTA.
Oxycodone: Naloxone (opioid antagonist).