A&E in anaesthesia Flashcards Preview

Principles of Science BVetMed 3 > A&E in anaesthesia > Flashcards

Flashcards in A&E in anaesthesia Deck (21):
1

Why might you get tachycardia, hypotension and apnoea immediately after propofol administration?

The induction agent was administered too quickly

2

What should you do next if you get tachycardia, hypotension and apnoea immediately after propofol administration?

Administer 1-2 breaths and give the patient time to start breathing spontaneously

3

What happens if a capnograph wave does not drop to zero for inspired CO2? What should you do?

the dog is rebreathing --> check the soda lime and the breathing system

4

What might cause tachycardia one hour into a surgery? 7

- pain
- light anaesthesia
- hypovolaemia
- hypotension
- hypoxaemia
- hypercapnia
- hyperthermia

5

What should you do to determine why an animal has become tachycardic under GA?

- palpate pulse
- take BP
- look at MM colour
- evaluate blood loss
- evaluate anaesthetic depth
- check pulse oximeter, capnograph, blood gas (O2 and CO2)

6

How can you estimate blood loss?

- count swabs (hold 5-8ml of blood each)
- DOG = 80-90ml/kg normal blood
- CAT = 60-70 ml/kg normal blood

7

What might you do in the case of blood loss causing tachycardia under GA? 5

- calculate blood loss
- administer a bolus of crystalloid fluid (if doesn't work use a colloid, if not give a blood transfusion)
- decrease anaesthetic depth
- switch anaesthesia to a less cardio-depressant drug
- last resort = start a dopamine infusion to increase BP

8

Why might you have a central eye position and a brisk palpebral reflex?

the depth of anaesthesia is too light (immediate actin = increase the vaporiser setting, then possibly administer more analgesia)

9

T/F: morphine causes respiratory depression

True

10

What should you do if you see an overinflated bag?

open the pop-off valve to relieve the pressure

11

What happens if the pop-off valve is closed? 2

- gas flow from flowmeters has nowhere to escape
- increased intra-thoracic pressure as lungs inflate

12

What does increased alveolar pressure cause? 4

- compression (collapse) of pulmonary capillaries (reduced preload)
- compression of heart chambers (decreased filling)
- compression of aorta (increased afterload) --> dramatic reduction in CO --> circulatory arrest
- alveolar damage/rupture

13

What should you check for after increased intra-thoracic pressure? 4

- check for pneumothorax
- check HR goes back up to normal
- check MM, SpO2
- check for other problems too

14

Why might the SpO2 reading be too low? 3

- there is an obstruction of the ETT (commonest cause in cats because it is a small tube)
- medetomidine-induced vasoconstriction
- anaemia

15

Why might airway obstruction occur? 3

- kinking of the ETT
- material within the ETT
- overinflation of the tube cuff
- ACTION: remove the ETT to check if obstructed.

16

List causes of prolonged anaesthetic recovery - 7

- hypothermia
- hypoglycaemia
- hepatic or renal failure
- very thin/fat animals
- hypovolaemia
- hypotension
- cardiovascular collapse
*If no recovery = brain death (brain hypoxia)*

17

Why might a cat have a ruptured trachea when under GA? 2

- cuff overinflation
- problems intubating the cat

18

What should you do if you suspect a cat has a ruptured trachea?

take xray to check for pneumomediastinum or pneumothorax (depending on whether the rupture was cranial or caudal to the carina). Place chest drain +/- repair (if large).

19

Define CPCR

Cardiopulmonary cerebral resuscitation

20

What are the 3 main steps in CPCR?

- Intubation
- Ventilation
- Cardiac massage (for 2 minutes then check ECG to see if anything is occurring)

21

How many people do you need for CPCR?

3 people:
1.) feel pulses
2.) ventilate
3.) CPCR
Swab round as CPR is hard work.

Decks in Principles of Science BVetMed 3 Class (110):