Mnemonics

Have a good mnemonic?  Share it!

-jdm

Half life for cyclotron-produced PET radionuclides other than F-18:

ONC-ology (many are used in cancer imaging)

O - N - C:  Oxygen, Nitrogen, Carbon

2 x 10 = 20

2 minutes, 10 minutes, 20 minutes

I know it's hardly ever used anymore, but it's a great ventilation tracer!  Here's how to remember why:

Krypton-81m half-life is 13 seconds. (13.10 to be exact) 

Superman's "unlucky" element is kryptonite.  "13" is an unlucky number. 

Pituitary - FLAT PiG:

FSH,

LH,

ACTH,

TSH,

Prolactin,

(ignore),

GH

TAN HATS for hypothalamus.

1) Thirst ("I'm supra-opti thirsty!")

2) Adenohypophysis via Release Hormones (see "Pituitary = FLAT PiG")

3) Neurohypophysis (via oxy/ADH)

4) Hunger/Satiety

5) Autonomic (Anterior is pArasympathetic; Suprachiasmatic is circadian -- think "chiasma" like a shadow, is "dreamy")

6) Temperature (A/C --> Anterior Cools, posterior heats)

7) Sexual = Septate nucleus (think "sextate")

How to remember the charge of the cornea and tongue (relevant for EEG artifacts):

          (+)     (+)

                .

         ----------/

I suppose it does need some explanation.

The "+" signs mean that the cornea has a positive charge.  So wherever the cornea moves towards a lead, you can expect a positive deflection on the EEG.  And whenever the cornea moves away from a lead, you can expect a negative deflection.

So if someone looks towards the right, you should see positive deflections in the right leads, and negative deflections in the left leads.

All those minus signs at the mouth represent that the tip of the tongue has a net negative charge compared to the rest of the tongue.  This is why tongue movements (e.g., talking) can create artifacts on the EEG.

Hope this helps.  Thanks for the comments and questions.

REFERENCES:

Fisch, B.J. (1999).  Fisch and Spehlmann's EEG Primer: Basic Principles of Digital and Analog EEG. 3rd Edition.  Elsevier, Amsterdam.  (ISBN:0444821481)

 Here is the pneumonic for one of the most wanted  NSU Q's

indication 4 intubation

Intubation "IS to give sombody REST + O2"

"IS - increase in ICP ; SHOCK ( cardiovascular)
REST - RR > 35 , RR < 5
E - Exhaution or labored breathing
S - Prolonged recovery from SURGERY/TRAUMA
T - Tidal vol < 5 ml/kg
O2 - SaO2<90% on O2;PaO2<60, PaCO2>60

  08/15/2006
GCS <8; FVC <15; NIF < -20; Pao2<60/PaCO2>60

Where's the gene for NF1?

Chromosome 17.

How do you remember this?  There are 17 letters in "von Recklinghausen" and "Neurofibromatosis".

To rememer that MGN is involved with audition and LGN is involved with vision:

Light, LGN

Music, MGN 

Howdy.

Thanks for the mnemonic on blood on the MRI.

I've tweaked the WSYWIG editor for forums and comments, so it should work now.

One note - once someone replies to a comment, the original comment cannot be edited.

now i can't delete this

Blood products degrade over time. These changes are relflected on MRI T1 and T2 depending on time, this allows physicians to estimate how long blood has been present. Changes occur at the following times: 

• <24 Hrs: hyperacute
• 1 d -3 d: acute
• 3 - 7 d: early subacute
• 7-14 d: late subacute
• >14 d: chronic
  

Mnemonic based on T1 and T2 changes:

MRI: I Bleed, I Die, Bleed Die, Bleed Bleed, Die Die. (I-isointence, B-hyperintence, D-Hypointense)

I Bleed (hyperacute), I Die (acute), Bleed Die (early subacute), Bleed Bleed (late subacute), Die Die (chronic)

alternate: I Be IDdy BiDdy  BaBy DaDdy

Hgb Products over time: Oh Death MIss ME Here

                      Oxy, Deoxy, Methhem- (Intracellular), Methhem- (Extrecellular), Hemosiderin

see the table here for further review: http://www.emedicine.com/neuro/TOPIC177.HTM

* special note: Iso intense may also be hypointense.

** thanks to JJ for alternate, thanks to MD for original.

*** this topic appeared on old rites and is relatively high yield.

It Be an IDy BiDy BaBy's DaDdy

T1 is bright with methemoglobin.

T2 is bright whenever ions (Fe2+ or extracellular methemoglobin) occur.

Mee's lines are a sign of Heavy Metal poisoning.

Like guitar strings across your fingernails.

It Be an IDy BiDy BaBy's DaDdy

T1 is dark and burns bright a bit with methemoglobin, and darkens when hemosiderin develops.

T2 is bright whenever oxidizing ionization (Fe2+ or extracellular methemoglobin) occurs, but also darkens when hemosiderinization occurs.

Von Hippel Lindau

 3 words => Chromosome 3

Hunting 4 food => Chromosone 4

DUMBBELSS

Diarrhea

Urination

Miosis

Bronchospasm

Bradycardia

Excitation of skeletal muscle and CNS

Lacrimation

Sweating

Salivation

Antidote: Atropine