Miscellaneous

Question 1

BMI calc

Answer 1

Weight (kg) / height (m^2)

*2.54 cm/inch remember

Question 2

Ideal body weight

Answer 2

Men: height (cm) - 100
Women: height (cm) - 105

Question 3

CO change?

Answer 3

CO ↑ 100mL/min for every extra kg of fat

Question 4

Lean body weight

Answer 4

IBW x 1.3

Question 5

Sux intubation dose for obesity

Answer 5

Should actually be based on TBW -

Question 6

Epidural dose in obese

Answer 6

75% normal

Question 7

OSA definition

Answer 7

Cessation of airflow for at least 10 seconds with 5 or more unsuccessful attempts to breathe and greater 4% reduction in Sa02

Question 8

Reynolds number

Answer 8

Determines laminar, turbulent, and transitional flow

Density x diameter x velocity / viscosity

<2000=laminar: terminal bronchioles, blood flow in systemic circulation

> 4000=turbulent: flow thru orifice (glottis, annular space), flow at angles (medium sized bronchi)

Question 9

Yearly max rem exposure

Answer 9

5rem, 0.5rem if pregnant

Question 10

Distance and radiation exposure

Answer 10

Amount of radiation exposure is inversely proportional to the square of the distance

Intensity = 1/distance ^2

Question 11

Converting F/C temperature

Answer 11

Celsius = (F-32) x (5/9)
F = (C x 1.8) + 32

Question 12

Avogadro number

Answer 12

1 mole of any gas has 6.023 x 10^23 atoms

Question 13

ATM pressure in all units

Answer 13

760 mmHg = 760 torr = 
1 atm = 1 bar = 
100kPa = 
1033cm H20 = 
14.7lb/inch ^2

1mmHg = 1.36cm H20
1cm H20 = 0.74mmHg

Question 14

Doubling radius of tube ↑ flow by factor of what?

Answer 14

16

Tripling = ↑ by factor of 81

Quadrupling = ↑ by factor of 256

Question 15

Ohm’s law

Answer 15

Flow = pressure gradient / resistance

Or

CO = (MAP - CVP)/SVR

Question 16

Variables in poiseuille’s law

Answer 16

Blood flow =

Pi x Radius^4 x AV pressure gradient / 8 x viscosity x tube length

Question 17

Methods of heat loss from most to least

Answer 17

Radiation > convection > evaporation > conduction

Question 18

Drugs used to treat post op shivering

Answer 18

Meperidine, dexmedetomidine, clonidine

Question 19

Sequence of steps if airway fire is present

Answer 19

1. Stop ventilation and remove ETT
2. Stop flow of all airway gases
3. Remove other flammable material from airway
4. Pour water or saline into airway
5. If fire not out, use C02 extinguisher

Question 20

Steps after fire is controlled

Answer 20

1. Re establish BVM, avoid 02 or N20
2. Check ETT for damage, fragments may remain in airway
3. Perform bronchoscopy to inspect for airway injury or retained fragments

Question 21

3 other → of drug induced hyperthermia besides MH?

Answer 21

Neuroleptic malignant syndrome, serotonin syndrome, anticholinergic syndrome

Question 22

Differences between NMS and MH

Answer 22

NMS is not genetic, does not develop acutely, is associated with psychiatric meds.

Both MH and NMS cause muscle rigidity, hyperthermia, tachycardia, acidosis, and both are treated with Dantrolene.

Question 23

Cause of neuroleptic malignant syndrome?

Answer 23

• dopamine depletion in basal ganglia and hypothalamus

- metoclopramide, haloperidol, chlorpromazine, risperidone

Question 24

Cause(s) of serotonin syndrome

Answer 24

Excess 5-HT activity in CNS and PNS

SSRIs, meperidine, ecstasy, selegline

SSRI + meperidine or fentanyl

MAOI + meperidine or ephedrine

Question 25

Treatment for serotonin syndrome

Answer 25

Cryproheptadine (5-HT2A antagonist)

Supportive care

Question 26

What is unique about the optic nerve?

Answer 26

Only cranial nerve that is part of CNS (enveloped by meningeal sheath and bathed in CSF)

Because of this path LA injected into optic sheath is permitted direct entry to brain (relevant with retrobulbar block)

Question 27

Ionizing radiation exposure

Answer 27

Inversely proportional to the square of the distance from the source.

Question 28

Gastrin

Answer 28

Stimulates pepsinogen secretion.

Question 29

Cholecystokinin

Answer 29

Stimulates gallbladder contraction

Question 30

Secretin

Answer 30

Stimulates bile flow

Question 31

Motility

Answer 31

Stimulates upper GI motility

Question 32

Macro shocks

Answer 32

10-20 mA = ouch yikes
50mA = LOC
100mA = vfib

Question 33

4 Things that MUST be proven in a malpractice lawsuit

Answer 33

Duty
Breach of duty
Causation
Damages

Question 34

Parkland burn formula

Answer 34

4mL LR x % TBSA x kg

1/2 first 8 hrs, 1/2 second 16 hrs)

Question 35

HIV exposure seroconversion rates

Answer 35

Percutaneous (needle stick) 0.3%

Mucous membrane 0.09%

Question 36

Factors included in Aldrete score

Answer 36

Activity
Respiration
Circulation
Neuro status
02 sats

Question 37

Order of heat loss (greatest —least)

Answer 37

Radiation 1
Convection 2
Evaporation 3
Conduction 4

Question 38

Celiac plexus block

Answer 38

Covers upper ABD organs: distal esophagus, stomach, liver, pancreas, small intestine, colon

Question 39

Superior hypogastric block

Answer 39

Covers pelvic organs : uterus, ovaries, prostate, descending colon

Question 40

Most common cause of death with liposuction

Answer 40

PE

Question 41

What does % solution translate to

Answer 41

2% solution contains 20mg/mL

Question 42

Epi concentrations for

1: 10,000
1: 100,000
1: 200,00

Answer 42

1: 1000=1mg/mL =1000mcg/mL
1: 10,000=100mcg/mL = 0.1mg/mL
1: 100,000=10mcg/mL
1: 200,000=5mcg/mL
1: 400,000=2.5mcg/mL
1: 1,000,000=1mcg/mL

Question 43

Common effects of chemotherapeutics

Answer 43

Cisplastin (alkylating agent): acoustic n injury, nephrotoxic

Vincristine (tubulin binding agent): peripheral neuropathy

Bleomycin : pulmonary fibrosis, keep Fi02 <30

Doxorubicin: cardiotoxic

5-Fluorouracil: bone marrow suppression
Methotrexate: bone marrow suppression