paramedic inter facility transfer training pharmacology review
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Paramedic Inter Facility Transfer Training PHARMACOLOGY Review. PHARMACOLOGY Review Quiz. Goals of the Pharmacology Review. Briefly review information that you have already had in your paramedic programs. The purpose of this program is not to teach new concepts of pharmacology. - PowerPoint PPT PresentationTRANSCRIPT
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Paramedic Inter Facility Paramedic Inter Facility Transfer Transfer TrainingTraining
PHARMACOLOGYReview
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PHARMACOLOGYReview Quiz
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• Briefly review information that you have already had in your paramedic programs.
• The purpose of this program is not to teach new concepts of pharmacology
Goals of the Pharmacology Review
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Medication and Transport
• The most common reason that you will be asked to transport a patient utilizing the PIFT module will be because the patient requires administration or monitoring of a medication or medications other than those normally carried in the paramedic drug box.
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Medication and Transport
• The new PIFT module allows an appropriately trained paramedic to administer or monitor 18 classes of medications, as well as OTC medications
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Medication and Transport
Potentially, this could involve as many as
several hundred different medications.
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This is a significant responsibility.– Safe, effective transport of patients
requires sound, fundamental knowledge of basic principles of pharmacology.
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IMPORTANT PHARMACOLOGICAL TERMS
• Antagonism– The opposition between 2 or more medications ex.
narcotics and Naloxone
• Bolus– A single, often large dose of a drug. Often the initial
dose
• Cumulative action– An increased effect caused by multiple doses of the
same drug. Caused by buildup in the blood.
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• Hypersensitivity– A reaction to a drug that is more profound than
expected and which often results in an exaggerated immune response
• Idiosyncrasy– A reaction to a drug that is significantly different from
what is expected
• Indication– The medical condition for which the drug has proven
therapeutic value
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• Parenteral– Any route of administration other than the digestive
tract
• Pharmacodynamics– Study of the mechanisms by which drugs act to
produce biochemical or physiological changes in the body
• Pharmacokinetics– Study of how drugs enter the body, reach their site of
action and are eliminated from the body
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• Potentiation– The enhancement of a drug’s effect by another drug – Eg. promethazine may enhance the effect of
morphine; also alcohol and barbiturates
• Refractory– The failure of a patient to respond as expected to a
certain medication
• Synergism– The combined action of 2 or more drugs that is
greater than the sum of the 2 drugs acting independently
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• Therapeutic Action– The intended action of a drug given in an appropriate
medical setting
• Therapeutic Threshold– The minimum amount of a drug that is required to
cause the desired response
• Therapeutic Index– The difference between the therapeutic threshold and
the amount of the drug considered to be toxic – Often referred to as Safe and Effective range
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• Tolerance– The decreased sensitivity or response to a
drug that occurs after repeated doses– Increased doses are required to achieve the
desired effect
• Untoward Effect– A side effect of a drug that is harmful to the
patient
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PHARMACOKINETICS
• Study of the metabolism and action of drugs
• Particularly emphasizes the following:
1. Absorption2. Distribution3. Biotransformation4. Excretion
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ABSORPTION
• The movement of a drug from its point of entry into the body into systemic circulation
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ABSORPTION
• Factors influencing rate of absorption:• Drug concentration• Site of absorption• pH of the drug
– Acids into acids, etc.
• Status of circulation• Solubility
– Water based vs. oil based
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DISTRIBUTION
• The manner in which a drug is transported from the site of absorption to the site of action
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DISTRIBUTION
• Influenced by several factors:• Cardiovascular function
–HR, BP, EF
• Physical barriers–Blood-brain and placenta barriers
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BIOTRANSFORMATION
• The process by which drugs are inactivated and transformed into a form that can be eliminated from the body
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BIOTRANSFORMATION
• Inactive forms are called metabolites
• Rate of transformation will determine how often a drug must be administered– Eg. Epinephrine transforms in 3-5 minutes
• The liver is the most significant organ in the transformation process
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EXCRETION
• The process of eliminating drugs from the body
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EXCRETION
• Primarily accomplished through the kidneys but may also involve the liver, the lungs, intestines, sweat and mammary glands
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PHARMACODYNAMICS
How a drug works and how we can expect the body to
respond to the administration of a drug
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PHARMACODYNAMICS
• Most drugs work through interactions with receptor sites. – These are protein coatings found on the outer
surface of the cell membrane.– Generally, when a drug binds or attaches to a
receptor site, a chemical reaction occurs that initiates the desired physiological or therapeutic response.
– Such drugs are called agonists.
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Some drugs work through the principle of antagonism– In such cases, a drug competes with
another drug or chemical for position at a receptor site.
– We see this with Naloxone which competes with narcotic drugs• In this case Naloxone would be an antagonist.
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AUTONOMIC NERVOUS SYSTEM
• The Peripheral nervous system is divided into afferent and efferent divisions.
• The section of the efferent division that controls involuntary bodily functions is known as the Autonomic Nervous System.
• These functions include cardiac function, body temperature, smooth muscle, gland function and arterial blood pressure.
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AUTONOMIC NERVOUS SYSTEM
• Sympathetic nervous system
• Parasympathetic nervous system
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SYMPATHETIC NERVOUS SYSTEM
• Prepares body to deal with stress– Fight or flight response
• Neurotransmitters are epinephrine and norepinephrine– Chemical substances that facilitate
excitation or inhibition of target cells
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• A drug that stimulates the sympathetic nervous system is known as a sympathomimetic or adrenergic agent
• A drug that inhibits the sympathetic nervous system is called a sympatholytic or anti-adrenergic agent
• Ex. Propanolol ( beta blocker )
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PARASYMPATHETIC NERVOUS SYSTEM
• Controls vegetative functions– Constriction of pupils, slowing of heart rate,
constriction of bronchioles, etc.• Neurotransmitter is Acetylcholine• A drug that stimulates the system is called a
Parasympathomimetic or cholinergic drug– Eg. Prostigmine
• A drug that blocks or inhibits the system is called a Parasympatholytic or anticholinergic drug– Eg. Atropine
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Classifications of Medications• Anticoagulants• Anticonvulsants• Antidiabetics• Antidysrhythmics• Antihypertensives• Anti-infectives• Antipsychotics• Cardiac
Glycosides• Corticosteroids• Drotrecogin
• GI Agents• IV fluids• Narcotics• Parenteral Nutrition• Platelet Aggregation
Inhibitors• Respiratory Medications• Sedatives• Vasoactive agents
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GENERAL CONCEPTS
• Check transfer order carefully to be sure that all medications ordered are permitted under the PIFT program.
• Be sure that order specifies:– Dosage information– Times of administration (where applicable)– Indications for changes or discontinuance.– Eg. Nitroglycerin dosage is often altered
based on pain and/or BP.
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• Ask the physician or RN to review medication if it is one that you are not familiar with. – Discuss potential adverse reactions and
how to deal with them.
– Use resources to double check
GENERAL CONCEPTS
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• Determine how long it will take to reach receiving facility and calculate the amount of the drug you will need to reach your destination. – Allow for unforeseen delays.
GENERAL CONCEPTS
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• Check to be sure that you have the right drug and the right concentration.
• Check expiration dates of all medications.
GENERAL CONCEPTS
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• Be sure that you thoroughly understand how to use the infusion pump being supplied by the hospital– Are you able to troubleshoot potential
problems?
• Check IV site for patency, redness, etc.
GENERAL CONCEPTS
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• Be sure to have a drug reference book available in your ambulance
• Review drug reference for detailed information about the drug. – Review side effects, adverse reactions,
dosing, interactions, etc.
• Contact medical control if it becomes necessary to administer another drug to ascertain possible interaction problems
GENERAL CONCEPTS