Medicine Flashcards
(96 cards)
What are the reasons for post op fever?
- Wind (12-24 h): atelectasis, post-op hyperthermia
- Water (~24 h): UTI
- Walk (~48 h): DVT, PE
- Wound (72 h): post-op infection
- Wonder drug (anytime): drug fever
What are the treatments for post op fever?
- Wind: incentive spirometer
- Water: straight cath; UA with gram stain/culture/sensitivity; abs if necessary
- Walk: heparin or lovenox protocol; get patient up and walking; Ted hose
- Wound: X-ray; gram stain; culture and sensitivity; blood cultures; begin ab
- Wonder drug: d/c drug; give reversal if necessary
When do fever peaks occur?
Between 4-8 pm
What part of the brain regulates body temp?
Hypothalamus
What is malignant hyperthermia?
A side effect of general anesthesia - tachycardia, HTN, acid-base and electrolyte abnormalities, muscular rigidity, hyperthermia
What is the treatment for malignant hyperthermia?
Dantrolene
2.5 mg/kg IV x 1, then 1 mg/kg IV rapid push q6h until symptoms subside or until max dose of 10 mg/kg
If a risk of malignant hyperthermia is suspected, what pre-op test may be performed?
CPK - elevated in 79% of patients with malignant hyperthermia
What is the mechanism of action for local anesthetics?
Block Na+ channels and conduction of AP’s along sensory nerves
What is the toxic dose of lidocaine?
300 mg plain (4.5 mg/kg)
500 mg w/ epi (7.0 mg/kg)
What is the toxic dose of bupivacaine?
175 mg plain (2.5 mg/kg)
225 mg w/ epi (3.2 mg/kg)
How to convert percentage of solution to mg/ml?
Move decimal point of percentage one place to the right (ex: 1% solution has 10 mg/ml)
What are the side effects of lidocaine and bupivacaine associated with systemic exposure?
- CNS effects: initial excitation (dizziness, blurred vision, tremor, seizures) followed by depression (respiratory depression, depression, LOC)
- cardiovascular effects: hypotension, bradycardia, arrhythmias, cardiac arrest
What can be given to help reverse local anesthetic-induced cardiovascular collapse?
Intravenous fat emulsion (Intralipid)
Is there a risk with intra-articular injections of bupivacaine?
Studies have shown chondrocyte death following prolonged exposure to bupivacaine
In what age group should bupivacaine be avoided?
Children < 12 yo
Name two amides anesthetics and how they are metabolized.
Lidocaine
Bulivicaine
(Amides have two i’s!!)
Liver
Name an ester anesthetic. How are they metabolized?
Novocain
Plasma pseudocholinesterase
What is the only local anesthetic with vasoconstriction?
Cocaine
How is cocaine metabolized?
Plasma pseudocholinesterase (like other esters)
Can locals cross the placental barrier?
Yes
What does MAC (as in MAC with local) stand for?
Monitored anesthesia care
For anesthesia, what cannot be given to a patient with an egg shell injury?
Propofol (Diprivan)
Mnemonic for pain management with a codeine allergy?
STUD-N
S:Stadol T:Toradol T:Talwin U:Ultram D:Darvon D:Darvocet D:Demerol N:Nubain
First choice for non-narcotic oral med?
Tramadol (ultram)
50 mg 1-2 tabs PO q4-6h prn pain
Max daily dose of 400 mg daily