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83 Cards in this Set

  • Front
  • Back
Nervous System – 2 components
1) Central Nervous
a. Brain
b. Spinal cord
2) Peripheral Nervous System
Autonomic Nervous System
is a component of the peripheral nervous system.
This is the system of regulation.
It is involuntary.
Autonomic Nervous System - 2 components
Parasympathetic System
Sympathetic System
vegetative state
Parasympathetic System
the primary chemical mediator of the parasympathetic system
Acetylcholine
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
This is the system that responds to stress.
Known as the “Fight or Flight System”
Sympathetic System
Primary chemical mediator is Norepinephrine, epinephrine.
Sympathetic System
Sympathetic System functions through stimulation of these receptors:
Alpha
Beta
Alpha Receptors are located primarily in three areas:
Heart: no direct stimulation
Lungs: bronchoconstriction
Blood vessels: vasoconstriction
Beta Receptors are located primarily in three areas:
Heart: increases heart rate
Lungs: bronchodilation
Blood vessels: vasodilation
Beta receptors are divided into
Beta 1 and Beta 2
Beta 1 receptors are located in
the heart
Beta 2 receptors are located in
the lungs and blood vessels.
synapse
space between nerve cells.
neurotransmitter
chemical messenger that conducts a nervous impulse across a synapse.
neuron
nerve cell.
cholinergic
pertaining to the neurotransmitter acetylcholine.
adrenergic
pertaining to the neurotransmitter norepinephrine.
types of sympathetic receptors are the
adrenergic receptors and the dopaminergic receptors.
two types of intravenous access,
peripheral and central.
peripheral venous access
surgical puncture of a vein in the arm, leg, or neck.
central venous access
surgical puncture of the internal jugular, subclavian, or femoral vein.
The major advantage of peripheral venous access
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.
colloid
intravenous solutions containing large proteins that cannot pass through capillary membranes.
Common colloids:
a. Plasma Protein Fraction (Plasmanate)
b. Salt Poor Albumin
c. Dextran
d. Hetastarch (Hespan)
Crystalloids:
primary out-of-hospital IV solution. Contain electrolytes and water but lack colloids’ larger proteins
Types Crystalloids Solutions:
1. Lactated Ringer’s: isotonic
2. Normal Saline Solution: isotonic
3. D5W: hypotonic glucose solution
Three basic types of IV cannulas:
1. Over-the-needle catheter
2. Hollow-needle catheter
3. Plastic catheter inserted through a hollow needle
Factors Affecting Flow Rates
Completely filled drip chamber.
Catheter patency
Abrupt onset of fever, chills, backache, headache, N/V characterize these reactions.
Typically, occurs with 30 to 90 minutes.
Pyrogenic Reaction
Inflammation of the vein. Common in long-term IV therapy. Redness and edema at puncture site.
Thrombophlebitis
Aspirin, Coumadin, or heparin increase the chance of bleeding and impede hemorrhage control during IV insertion.
Anticoagulants
Blood tube Order
(red, blue, green, purple, gray)
CONTRAINDICATIONS TO IO INFUSION
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
INDICATIONS TO IO INFUSION
Situations include: (shock, status epilepticus, trauma, cardiac arrest, and critical pediatric patients where rapid IV access cannot be obtained
6 rights of medication administration:
Right Person
Right Drug
Right Dose
Right Time
Right Route
Right Documentation
Describes a medical environment free of pathogens
Medical Asepsis
Sterile
environment is free of all forms of life.
Usually requires extensive heat or chemicals.
Difficult to attain in the prehospital setting.
Sterile
Cleaning agents that are toxic to living tissue.
Disinfectants
techniques involve the careful handling of sterile equipment to prevent contamination.
Medically clean
Cleaning agents that are NOT toxic to living tissue.
Antiseptics
4 categories of Routes of administration:
Percutaneous
Pulmonary
Enteral
Parenteral
Percutaneous types
Transdermal
Mucous Membranes
Mucous Membranes Drug Admin
Buccal
Sublingual
Ocular
Aural
Nasal
PULMONARY DRUG ADMINISTRATION VIA
inhalation (nebulizer or MDI) or injection
Delivery of any medication that is absorbed through the gastrointestinal tract.
ENTERAL DRUG ADMINISTRATION
Enteral Routes include
Oral
Orogastric/Nasogastric tube
Rectal
Parenteral Routes include
Intradermal injection
Subcutaneous injection
Intramuscular injection
Intravenous access
Intraosseous infusion
Any drug administered outside of the GI tract.
PARENTERAL DRUG ADMINISTRATION
Nonconstituted Drug Vial consists of two vials:
1. powdered medication
2. liquid mixing solution
Drug Names
Chemical Name;
Generic Name;
Official Name;
Brand Name;
Four main sources of drugs:
Plants:
Animal:
Minerals:
Laboratory:
11 Components of Drug Profile:
Name:
Classification:
Mechanism of Action:
Indications:
Pharmacokinetics:
Side effects/adverse reactions:
Routes of Administration:
Contraindications;
Dosage:
How supplied:
Special considerations:
how the drug is absorbed, distributed, and eliminated; typically includes onset and duration of action
Pharmacokinetics:
Pharmacokinetics Processes:
1. absorption
2. distribution
3. biotransformation
4. elimination
gives a good approximation for children of average height/weight ratio
Broselow tape
A mechanism requires the use of energy to move a substance.
active transport
Movement of a substance without the use of energy
Passive Transport (Diffusion and osmosis )
involves the movement of solute in the solution
Diffusion (high to low)
involves the movement of the solvent.
osmosis (low to high)
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.
Carrier-mediated diffusion or facilitated diffusion
Simply the movement of molecules across a membrane down a pressure gradient, from an area of high pressure to an area of lower pressure.
filtration
the measure of the amount of a drug that is still active after it reaches its target tissue.
Bioavailability:
Certain organs exclude some drugs from distribution
1. blood-brain barrier.

2. placental barrier
Special name given to the metabolism of drugs is.
biotransformation
The first pass through the liver may partially or completely inactivate many drugs.
This first-pass effect
4 Actions of Drugs:
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
Force of attraction between a drug and a receptor is their
affinity
A drug’s pharmacodynamics also involve its ability to cause the expected response, or
efficacy
Binding of a drug to a target cell receptor causes the number of receptors to decrease:
down-regulation.
Less common, a drug can cause the formation of more receptors than normal:
up-regulation.
bind to the receptor and cause it to initiate the expected response
Agonists:
bind to a site but do not cause the receptor to initiate the expected response
Antagonists:
drugs that have the ability to stimulate and block
(AKA: partial agonists)
Agonist-antagonists:
considered surmountable because a sufficiently large dose of the agonist can overcome the antagonism
Competitive antagonism:
considered insurmountable because no amount of agonist could overcome it. Changes the shape of the binding site and prevents the agonist from fitting
Noncompetitive antagonism:
may also occur when a competitive antagonist permanently binds with a receptor site.
Irreversible antagonism:
is the time from administration until a medication reaches its minimum effective concentration
Onset of action
is measured from when the drug’s level drops below the minimum effective concentration until it is eliminated from the body
Termination of action
is the time the body takes to clear one half of the drug.
biologic half-life
8 Factors Altering Drug Response
Age:
Body Mass:
Sex:
Environmental milieu:
Time of Administration:
Pathologic state:
Genetic factors:
Psychological factors: