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83 Cards in this Set
- Front
- Back
Nervous System – 2 components
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1) Central Nervous
a. Brain b. Spinal cord 2) Peripheral Nervous System |
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Autonomic Nervous System
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is a component of the peripheral nervous system.
This is the system of regulation. It is involuntary. |
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Autonomic Nervous System - 2 components
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Parasympathetic System
Sympathetic System |
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vegetative state
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Parasympathetic System
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the primary chemical mediator of the parasympathetic system
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Acetylcholine
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This systems slows all things down except the GI Tract.
Increases peristalsis. Slows heart rate, slows respiratory rate, lower BP. Controlled through the Vagus nerve |
Parasympathetic
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This is the system that responds to stress.
Known as the “Fight or Flight System” |
Sympathetic System
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Primary chemical mediator is Norepinephrine, epinephrine.
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Sympathetic System
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Sympathetic System functions through stimulation of these receptors:
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Alpha
Beta |
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Alpha Receptors are located primarily in three areas:
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Heart: no direct stimulation
Lungs: bronchoconstriction Blood vessels: vasoconstriction |
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Beta Receptors are located primarily in three areas:
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Heart: increases heart rate
Lungs: bronchodilation Blood vessels: vasodilation |
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Beta receptors are divided into
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Beta 1 and Beta 2
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Beta 1 receptors are located in
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the heart
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Beta 2 receptors are located in
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the lungs and blood vessels.
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synapse
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space between nerve cells.
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neurotransmitter
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chemical messenger that conducts a nervous impulse across a synapse.
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neuron
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nerve cell.
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cholinergic
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pertaining to the neurotransmitter acetylcholine.
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adrenergic
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pertaining to the neurotransmitter norepinephrine.
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types of sympathetic receptors are the
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adrenergic receptors and the dopaminergic receptors.
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two types of intravenous access,
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peripheral and central.
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peripheral venous access
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surgical puncture of a vein in the arm, leg, or neck.
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central venous access
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surgical puncture of the internal jugular, subclavian, or femoral vein.
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The major advantage of peripheral venous access
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relatively simple visualizing and accessing the veins. Additionally, you can access peripheral veins while simultaneously doing other life- sustaining proce-dures such as CPR or endotracheal intubation.
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colloid
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intravenous solutions containing large proteins that cannot pass through capillary membranes.
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Common colloids:
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a. Plasma Protein Fraction (Plasmanate)
b. Salt Poor Albumin c. Dextran d. Hetastarch (Hespan) |
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Crystalloids:
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primary out-of-hospital IV solution. Contain electrolytes and water but lack colloids’ larger proteins
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Types Crystalloids Solutions:
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1. Lactated Ringer’s: isotonic
2. Normal Saline Solution: isotonic 3. D5W: hypotonic glucose solution |
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Three basic types of IV cannulas:
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1. Over-the-needle catheter
2. Hollow-needle catheter 3. Plastic catheter inserted through a hollow needle |
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Factors Affecting Flow Rates
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Completely filled drip chamber.
Catheter patency |
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Abrupt onset of fever, chills, backache, headache, N/V characterize these reactions.
Typically, occurs with 30 to 90 minutes. |
Pyrogenic Reaction
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Inflammation of the vein. Common in long-term IV therapy. Redness and edema at puncture site.
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Thrombophlebitis
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Aspirin, Coumadin, or heparin increase the chance of bleeding and impede hemorrhage control during IV insertion.
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Anticoagulants
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Blood tube Order
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(red, blue, green, purple, gray)
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CONTRAINDICATIONS TO IO INFUSION
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1. Fracture to the tibia or femur on the side of access
2. Osteogenesis imperfecta – congenital bone disease that results in fragile bones 3. Osteoporosis 4. Establishment of a peripheral IV line |
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INDICATIONS TO IO INFUSION
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Situations include: (shock, status epilepticus, trauma, cardiac arrest, and critical pediatric patients where rapid IV access cannot be obtained
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6 rights of medication administration:
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Right Person
Right Drug Right Dose Right Time Right Route Right Documentation |
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Describes a medical environment free of pathogens
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Medical Asepsis
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Sterile
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environment is free of all forms of life.
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Usually requires extensive heat or chemicals.
Difficult to attain in the prehospital setting. |
Sterile
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Cleaning agents that are toxic to living tissue.
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Disinfectants
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techniques involve the careful handling of sterile equipment to prevent contamination.
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Medically clean
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Cleaning agents that are NOT toxic to living tissue.
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Antiseptics
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4 categories of Routes of administration:
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Percutaneous
Pulmonary Enteral Parenteral |
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Percutaneous types
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Transdermal
Mucous Membranes |
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Mucous Membranes Drug Admin
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Buccal
Sublingual Ocular Aural Nasal |
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PULMONARY DRUG ADMINISTRATION VIA
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inhalation (nebulizer or MDI) or injection
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Delivery of any medication that is absorbed through the gastrointestinal tract.
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ENTERAL DRUG ADMINISTRATION
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Enteral Routes include
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Oral
Orogastric/Nasogastric tube Rectal |
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Parenteral Routes include
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Intradermal injection
Subcutaneous injection Intramuscular injection Intravenous access Intraosseous infusion |
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Any drug administered outside of the GI tract.
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PARENTERAL DRUG ADMINISTRATION
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Nonconstituted Drug Vial consists of two vials:
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1. powdered medication
2. liquid mixing solution |
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Drug Names
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Chemical Name;
Generic Name; Official Name; Brand Name; |
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Four main sources of drugs:
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Plants:
Animal: Minerals: Laboratory: |
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11 Components of Drug Profile:
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Name:
Classification: Mechanism of Action: Indications: Pharmacokinetics: Side effects/adverse reactions: Routes of Administration: Contraindications; Dosage: How supplied: Special considerations: |
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how the drug is absorbed, distributed, and eliminated; typically includes onset and duration of action
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Pharmacokinetics:
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Pharmacokinetics Processes:
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1. absorption
2. distribution 3. biotransformation 4. elimination |
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gives a good approximation for children of average height/weight ratio
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Broselow tape
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A mechanism requires the use of energy to move a substance.
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active transport
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Movement of a substance without the use of energy
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Passive Transport (Diffusion and osmosis )
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involves the movement of solute in the solution
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Diffusion (high to low)
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involves the movement of the solvent.
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osmosis (low to high)
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Occurs when large molecules (glucose), do not readily pass through the cell membrane and must bind with a carrier protein on the surface of the target cells.
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Carrier-mediated diffusion or facilitated diffusion
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Simply the movement of molecules across a membrane down a pressure gradient, from an area of high pressure to an area of lower pressure.
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filtration
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the measure of the amount of a drug that is still active after it reaches its target tissue.
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Bioavailability:
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Certain organs exclude some drugs from distribution
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1. blood-brain barrier.
2. placental barrier |
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Special name given to the metabolism of drugs is.
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biotransformation
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The first pass through the liver may partially or completely inactivate many drugs.
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This first-pass effect
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4 Actions of Drugs:
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1. May bind to a receptor site
2. Change the physical properties of cells 3. Chemically combine with other chemicals 4. Alter normal metabolic pathway |
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Force of attraction between a drug and a receptor is their
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affinity
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A drug’s pharmacodynamics also involve its ability to cause the expected response, or
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efficacy
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Binding of a drug to a target cell receptor causes the number of receptors to decrease:
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down-regulation.
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Less common, a drug can cause the formation of more receptors than normal:
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up-regulation.
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bind to the receptor and cause it to initiate the expected response
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Agonists:
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bind to a site but do not cause the receptor to initiate the expected response
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Antagonists:
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drugs that have the ability to stimulate and block
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(AKA: partial agonists)
Agonist-antagonists: |
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considered surmountable because a sufficiently large dose of the agonist can overcome the antagonism
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Competitive antagonism:
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considered insurmountable because no amount of agonist could overcome it. Changes the shape of the binding site and prevents the agonist from fitting
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Noncompetitive antagonism:
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may also occur when a competitive antagonist permanently binds with a receptor site.
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Irreversible antagonism:
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is the time from administration until a medication reaches its minimum effective concentration
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Onset of action
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is measured from when the drug’s level drops below the minimum effective concentration until it is eliminated from the body
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Termination of action
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is the time the body takes to clear one half of the drug.
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biologic half-life
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8 Factors Altering Drug Response
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Age:
Body Mass: Sex: Environmental milieu: Time of Administration: Pathologic state: Genetic factors: Psychological factors: |