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Questions and Answers
What is the difference between analgesia and anesthesia?
What is the difference between analgesia and anesthesia?
Which of the following is NOT considered part of a patient evaluation prior to anesthesia?
Which of the following is NOT considered part of a patient evaluation prior to anesthesia?
What does the abbreviation 'Pk' stand for in relation to drugs?
What does the abbreviation 'Pk' stand for in relation to drugs?
Which type of drip set is typically used for cats and smaller dogs?
Which type of drip set is typically used for cats and smaller dogs?
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What is the conversion factor for milligrams (mg) to micrograms (mcg)?
What is the conversion factor for milligrams (mg) to micrograms (mcg)?
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What is the Bispectral Index (BI) used for in veterinary medicine?
What is the Bispectral Index (BI) used for in veterinary medicine?
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Which of the following is NOT a sign of adequate anesthetic depth in an animal?
Which of the following is NOT a sign of adequate anesthetic depth in an animal?
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What is the primary benefit of using an esophageal stethoscope?
What is the primary benefit of using an esophageal stethoscope?
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Which of the following factors can influence the accuracy of Doppler blood pressure measurements?
Which of the following factors can influence the accuracy of Doppler blood pressure measurements?
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Which of the following is NOT a common sign of hypothermia in anesthetized patients?
Which of the following is NOT a common sign of hypothermia in anesthetized patients?
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What is the primary reason for using a Murphy's "murphy's eye" endotracheal tube?
What is the primary reason for using a Murphy's "murphy's eye" endotracheal tube?
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Which of the following is NOT a sign of Stage II anesthesia?
Which of the following is NOT a sign of Stage II anesthesia?
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What is the primary reason for checking the palpebral reflex during anesthesia?
What is the primary reason for checking the palpebral reflex during anesthesia?
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Which plane of anesthesia is ideal for most surgical procedures?
Which plane of anesthesia is ideal for most surgical procedures?
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What is the primary reason for avoiding excessive cuff inflation during endotracheal tube placement?
What is the primary reason for avoiding excessive cuff inflation during endotracheal tube placement?
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What is meant by "dead space" in terms of the respiratory system?
What is meant by "dead space" in terms of the respiratory system?
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What is the most common way to confirm endotracheal tube placement during anesthesia?
What is the most common way to confirm endotracheal tube placement during anesthesia?
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Which of the following is NOT a factor that can influence the monitoring of a patient's anesthesia depth?
Which of the following is NOT a factor that can influence the monitoring of a patient's anesthesia depth?
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What is the primary goal of monitoring a patient's clinical signs during anesthesia?
What is the primary goal of monitoring a patient's clinical signs during anesthesia?
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What is the approximate oxygen flow rate used during the maintenance phase of anesthesia?
What is the approximate oxygen flow rate used during the maintenance phase of anesthesia?
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What is the normal range for end-tidal carbon dioxide (ETCO2) in a healthy anesthetized patient?
What is the normal range for end-tidal carbon dioxide (ETCO2) in a healthy anesthetized patient?
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Which of the following is NOT a common sign of mild hypothermia in an anesthetized patient?
Which of the following is NOT a common sign of mild hypothermia in an anesthetized patient?
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Which of the following is the most common cause of iatrogenic hyperthermia during anesthesia?
Which of the following is the most common cause of iatrogenic hyperthermia during anesthesia?
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Which of the following is the best predictor of systolic arterial pressure (SAP) in patients?
Which of the following is the best predictor of systolic arterial pressure (SAP) in patients?
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Which of the following contributes MOST to heat loss in an animal?
Which of the following contributes MOST to heat loss in an animal?
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Which of the following is NOT considered one of the '4 H's' in anesthetic complications?
Which of the following is NOT considered one of the '4 H's' in anesthetic complications?
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What is the normal range for heart rate in an adult horse?
What is the normal range for heart rate in an adult horse?
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Which of the following is NOT a sign of severe hypothermia?
Which of the following is NOT a sign of severe hypothermia?
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What are the potential complications associated with using ice packs to cool a patient?
What are the potential complications associated with using ice packs to cool a patient?
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What is the primary organ in the central nervous system responsible for regulating body temperature?
What is the primary organ in the central nervous system responsible for regulating body temperature?
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Which of the following is NOT a recommended method for actively warming a hypothermic patient?
Which of the following is NOT a recommended method for actively warming a hypothermic patient?
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What is the recommended temperature to stop active cooling of a hyperthermic patient?
What is the recommended temperature to stop active cooling of a hyperthermic patient?
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What is the recommended oxygen flow rate for a patient recovering from anesthesia?
What is the recommended oxygen flow rate for a patient recovering from anesthesia?
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What is the recommended procedure for disconnecting a patient from the anesthesia machine?
What is the recommended procedure for disconnecting a patient from the anesthesia machine?
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What is the primary difference between fever and hyperthermia?
What is the primary difference between fever and hyperthermia?
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When monitoring a patient's temperature during recovery, how often should rectal temperature be taken?
When monitoring a patient's temperature during recovery, how often should rectal temperature be taken?
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What is the recommended fasting period for equines before surgery?
What is the recommended fasting period for equines before surgery?
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Which animal species should NOT be fasted before surgery?
Which animal species should NOT be fasted before surgery?
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Which of the following is a common anesthetic concern in obese animals?
Which of the following is a common anesthetic concern in obese animals?
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What is the ASA Physical Status classification for a patient with severe systemic disease, fever, anemia, and renal dysfunction?
What is the ASA Physical Status classification for a patient with severe systemic disease, fever, anemia, and renal dysfunction?
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What is the capillary refill time (CRT) associated with a hyperdynamic state and possible shock?
What is the capillary refill time (CRT) associated with a hyperdynamic state and possible shock?
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What is the recommended fasting period for small ruminants before surgery?
What is the recommended fasting period for small ruminants before surgery?
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Which of the following is NOT a common anesthetic concern?
Which of the following is NOT a common anesthetic concern?
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What is the primary difference between a PISS and a DISS?
What is the primary difference between a PISS and a DISS?
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Flashcards
Anesthesia
Anesthesia
Insensibility or loss of sensation in a body part or the whole body.
Analgesia
Analgesia
Absence of sensitivity to pain, often induced by certain drugs.
Sedation
Sedation
Depression of the CNS that keeps the patient calm but not fully unconscious.
Pharmacokinetics
Pharmacokinetics
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Patient Evaluation
Patient Evaluation
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Anesthetic Monitoring
Anesthetic Monitoring
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Bispectral Index (BI)
Bispectral Index (BI)
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Ventral Medial Eye Rotation
Ventral Medial Eye Rotation
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Noninvasive Blood Pressure Measurement
Noninvasive Blood Pressure Measurement
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Pulse Oximetry (SPO2)
Pulse Oximetry (SPO2)
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Fasting Times - Small Animals
Fasting Times - Small Animals
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Fasting Times - Small Ruminants
Fasting Times - Small Ruminants
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Fasting Times - Equines
Fasting Times - Equines
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Fasting Times - Cattles
Fasting Times - Cattles
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No Fasting - Rodents, Rabbits, Birds
No Fasting - Rodents, Rabbits, Birds
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Dehydration Clinical Signs
Dehydration Clinical Signs
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ASA Physical Status Scale
ASA Physical Status Scale
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Medical Gas Safety Mechanisms
Medical Gas Safety Mechanisms
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ET Tube Sizing
ET Tube Sizing
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Murphy ET Tube
Murphy ET Tube
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Capnograph Reading
Capnograph Reading
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Dead Space
Dead Space
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Cuff Inflation Technique
Cuff Inflation Technique
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Anesthesia Flow Rate
Anesthesia Flow Rate
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Stage II Anesthesia
Stage II Anesthesia
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Surgical Plane of Anesthesia
Surgical Plane of Anesthesia
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Factors Influencing Monitoring
Factors Influencing Monitoring
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Stage IV Anesthesia
Stage IV Anesthesia
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Fever
Fever
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Hyperthermia
Hyperthermia
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Heat Sensation Pathway
Heat Sensation Pathway
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Methods for Warming
Methods for Warming
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Cooling Techniques
Cooling Techniques
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Recovery Steps from Anesthesia
Recovery Steps from Anesthesia
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Monitoring Temperature Post-Anesthesia
Monitoring Temperature Post-Anesthesia
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Pyrexia vs Hyperthermia Treatment
Pyrexia vs Hyperthermia Treatment
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ECG
ECG
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P wave
P wave
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Normal PaO2
Normal PaO2
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Mild hypothermia
Mild hypothermia
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4 H's of anesthesia
4 H's of anesthesia
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Convection
Convection
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ST segment
ST segment
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Study Notes
Anesthesia Learning Objectives
- Anesthesia is the loss of sensation in a body part or the whole body
- Local anesthesia is different from general anesthesia
- Analgesia is the absence of pain sensitivity
- Sedation is a depression of the central nervous system, not unconsciousness
- Tranquilization is a state where the patient is awake but not aware of their surroundings
- Neuroleptanalgesia combines sedative/tranquilizer and opioid drugs for general premedication
- Pharmacokinetics study how the body metabolizes drugs, including half-lives
- Pharmacodynamics studies how drugs affect the body
- Fluid drip rates vary between macro and micro drip sets, depending on the size of the animal
- Macro drip sets (10 and 15 drops per mL) are for larger dogs
- Micro drip sets (60 drops per mL) are for smaller animals like cats and exotics
- 1mg = 100 mcg (ug)
Patient Evaluation Before Anesthesia
- Veterinarians perform patient evaluation before anesthesia
- Evaluation includes species, breed, age, sex, medical history, physical exam, blood and urine samples, temperament assessment, mentation, pain, and stress level
- Patient's condition before and after surgery is evaluated.
- Advanced diagnostics are considered in the evaluation.
Labwork for Healthy and Older/Unhealthy Pets
- Routine labwork for healthy pets includes PCV, TP, Glucose, and BUN.
- Older/unhealthy pets require additional labwork like CBC, chemistry, and urinalysis
Safety Mechanisms for Oxygen Delivery
- Safety mechanisms ensure the correct medical gas is used during oxygen delivery
- Oxygen is green, Nitrous oxide is blue
- DISS and PISS are specific threading for oxygen and other gases
Oxygen Cylinders
- Common oxygen cylinders are steel or aluminum
- Large cryogenic liquid oxygen containers are also used in some facilities.
- Portable "big thermo bottle" oxygen tanks are used in hospitals and clinics.
- Oxygen concentrators absorb nitrogen from air to increase oxygen concentration.
Anesthesia Machine Leak Test
- Occlude patient end of Y piece (ONLY time the APL valve is closed)
- Pressurize to 30 cmH20
- Observe pressure gauge for 30s
Anesthesia Machine Safety Concerns
- Patients become hypoxemic (decrease in oxygen levels)
- Environmental pollution
- Improper use of rebreathing or non rebreathing systems
Scavenging Systems
- Systems that remove waste products from anesthetic gases
- Passive systems use charcoal absorption for halogenated anesthetics
Types of Endotracheal Tubes (ET Tubes)
- ET tube size is important for fitting the patient safely
- Murphey’s tube is a common ET tube with an oval hole positioned on the bevel facing the opening, providing an occlusion safety feature
- Magill or coles tubes are less common.
- Methods for confirming proper placement include capnography readings, auscultation of bilateral breaths
Oxygen Flow Rate Calculations
- Calculate remaining oxygen and time until empty.
- P1/V1=P2/V2
Safety Concerns With Anesthesia Equipment
- Environmental pollution
- Patient hypoxemia
- Use of rebreathing or non-rebreathing systems: pros and cons
Bispectral Index (BI)
- Measures EEG values from the brain
- Value of 60 means adequate anesthesia
- Value of 0 = flat line, and 100 = awake
Normal Vital Limits During Anesthesia
- PaO2 > 95%
- ETCO2 = 35-45 mmHg
- MAP = 60-100 mmHg ( > 70 in Equines)
- SAP = 90-120 mmHg
- RR = 10-20 bpm
- Temperature = 98-102.5°F
- Species variations in heart rate exist (ranging from 50-160 BPM depending on animal)
Mechanisms of Heat Loss
- Radiation: electromagnetic waves
- Convection: air or water molecules
- Conduction: contact between objects.
- Evaporation: changing water to gas (sweat)
Common Complications of Anesthesia
- Hypothermia is a common complication
- Decrease in RR, renal tubular function
- Elevated serum amylase
- GI disruption
- Hyperkalemia
- Absent neuro reflexes.
- Moderate hypothermia (82.4-89.6⁰F) = Bradycardia, Slow RR, low BP.
- Severe hypothermia (<82.4⁰F)= decreased HR+RR, absence of PLR, arrhythmias, unconscious, muscle rigidity.
Four Most Common Issues with Anesthesia ("4 H's")
- Hypothermia
- Hypoxemia
- Hypotension (decreased cardiac output)
- Hypoventilation (increased CO2)
- Hyperthermia
Pitfalls during Anesthesia
- Don't use electric pads for cooling.
- Remove all non-essential monitors before releasing from anesthesia.
- Avoid keeping inhalant (vaporizer) on until completely out of surgery.
- Turn oxygen flow to 50-100 ml/kg/min
- Disconnect ET tube after 1-2 swallows in cats, and 2 swallows in dogs (laryngeal reflux noted before deflating cuff).
- Monitor all vitals until P fully awake. Assess potential pain meds after P is fully awake.
Difference Between Pyrexia and Hyperthermia
- Pyrexia: the body's attempt to fight an infection (Don't cool)
- Hyperthermia: excessive heat that needs to be actively cooled (Cool)
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Description
This quiz covers essential learning objectives related to anesthesia in veterinary practice. It includes distinctions between local and general anesthesia, explores sedatives and analgesics, and highlights the importance of pharmacokinetics and pharmacodynamics. Additionally, it addresses patient evaluation techniques crucial for safe anesthesia administration.