Chpt. 5 - Review Questions Flashcards Preview

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Flashcards in Chpt. 5 - Review Questions Deck (20):

True or False:
With most injectable and inhalant anesthetics, there is generally a progressive depression of cardiovascular and respiratory function as the depth of anesthesia increases.



The plane of anesthesia most suitable for surgical procedures is generally considered to be?

Stage III, plane 2


Breath holding, vocalization, and involuntary movement of the limbs are most likely an indication that the animal is in what stage or plane of anesthesia?

Stage II


Anatomic dead space is considered to be the?

Air within the trachea, pharynx, larynx, bronchi, and nasal passages (no air exchange happens here!)


The minimum acceptable heart rate for an anesthetized large breed dog is?

60 bpm


True or False:
If the ECG is normal, the heart must be beating normally.



In general, a respiratory rate of less than ... breaths/min in an anesthetized dog should be reported to the veterinarian.



Tachypnea is?

An increase in respiratory rate


A patient that has been anesthetized will often have a?

Mild respiratory acidosis


True or False:
An animal that is in a surgical plane of anesthesia should not respond in any way to any procedure that is being done to it (e.g. pulling on viscera should not change heart rate).



A 20-kg dog has been anesthetized by mask induction with isoflurane and after intubation is maintained on 2% isoflurane with a flow rate of 2 L of oxygen per minute. The heart rate is 80 bpm, respiratory rate is 8 breaths/min and shallow, the jaw tone is relaxed, and all reflexes are absent. This animal is most likely in what stage of anesthesia?

Stage III, plane 3


Pulse oximetry allows accurate estimation of?

Percent saturation of hemoglobin with oxygen


During anesthesia, a mean arterial blood pressure of less than 60 mm Hg indicates?

Inadequate tissue perfusion


A pulse oximeter reading of 89% indicates?

A need for supportive therapy


An ETco2 level of 65 would commonly be caused by?

Decreased tidal volume


Regarding oxygen transport:

Pao2 (partial pressure of oxygen in blood) is closely related to Spo2 (% of HGB binding sites in the bloodstream occupied by oxygen) As one goes up, the other does also.


Which of the following statements about body temperature is/are correct?

a. Body temperature of 32* to 34*C (89.6* to 93.2*F) cause prolonged anesthetic recovery.
b. Dangerous CNS depression and changes in cardiac function may be seen at body temperatures less than 32*C (89.6*F).
c. Ideally, IV fluids should be warmed to about 37.5*C (approx. 100*F) before administration to surgery patients.


Which of the following statements about nystagmus as a monitoring tool is/are accurate?

a. Nystagmus is commonly seen in horses in very light anesthesia.
b. Nystagmus is not a useful indicator of anesthetic depth in small animals.
c. In a horse, a "divergent eye sign" is typically associated with an adequate plane of anesthesia for surgery.
d. Ruminants rarely show nystagmus under anesthesia.


Pale mucous membranes commonly indicate?

a. Blood loss
b. Anemia
c. Decreased perfusion


An animal under stage III, plane 2, anesthesia would exhibit which of the following signs?

b. Regular respiration
c. Relaxed skeletal muscle tone