William The Coroner’s Forensic Files

Monday, 17, October, 2011

Vascular Pathology I and II

Filed under: Teaching — williamthecoroner @ 21:21

Vascular Pathology IVascular Pathology II

So There I Was

Filed under: Teaching — williamthecoroner @ 21:11

Sitting quietly in my office trying to catch up on papers now that IQ group is finished, in a pleasant,warm haze, when I get a phone call.

“Doctor Bligh-Glover,did you remember you were supposed to teach the dental students this week?” I check my Google calender. “No, that was NEXT week.”

“Oh, they must not have told you when they changed it.”

“When am I supposed to do this?”

“Fifteen minutes ago.”

Words cannot express the rush of adrenaline that went through me as I went down four flights of stairs, across the parking lot, and into the lecture hall. Then I learned what my lecture topic was to be. Two hours on atherosclerosis and vessel pathology. THAT lecture, was in my Google Docs, thank goodness, so I was able to do the bloody thing, but this arrangement was frankly, sub-optimal.

Asphyxia

Filed under: Forensics,Teaching — williamthecoroner @ 12:00

I know, you were waiting breathlessly for this one…

Asphyxia

I. Introduction
A. Anoxia vs. ischemia
B. Neck compression
1. Hanging
2. Ligature strangulation
3. Manual
C. Smothering
1. Burking
2. Pillow
3. Grain elevators
D. Choking
1. Bolus of food
2. Young or incapacitated
E. Positional (mechanical asphyxia)
1. Unable to make respiratory movements
2. Crushing of chest
3. Crucifixion
F. Poisonous environments
1. Manure pits, coal mines, gas ovens
2. Near dry ice
3. Freezers
H. Chemical asphyxia
1. CO
2. CN

II. Anoxia vs. ischemia
A. Anoxia lack of oxygen
B. Ischemia lack of blood flow
C. Ischemia worse
1. Re-perfusion injury
2. Lack of metabolic substrates
3. “Starve and strangle”

III. Cervical Compression
A. Hanging
1. Pressures
a. Venous 5#
b. Carotids 12#
c. Airway 40#
d. Vertebrals 65#
e. “Vascular hanging” impede outflow
f. Tardieu spots

Asphyxia p. 2

2. Suspension is not necessary
a. Complete noose
b. U-shaped
c. Chair or bet

3. “hangman’s fracture”
a. Short drop
b. Long drop
c. Cruel ones (piano wire)

IV. Strangulation
A. Ligature
1. below larynx
2. Homicidal, accidental suicidal
3. Spanish windlass
4. Belt as control

B. Manual
1. Pattern injuries, ♀ by ♂

V. Smothering
A. Block off air with soft object
1. Pillow over face
2. Final exit suicide.
3. Avalanche

B. Torn frenulum
Broken teeth

VI. Choking
A. Café coronary
B. Victims
1. Impaired. Alcohol.
2. Young
3. No teeth.

VII. Positional asphyxia
A. Pressure on chest
B. Industrial accidents
C. Crucifixion

Asphyxia p. 3

VIII. Exclusion of oxygen
A. Gases
1. Manure pit
2. Hiding in ice cream truck
3. CO2 heavier than air
4. Canary in coal mine

B. Dangerous environments
1. Refrigerators

IX. Chemical asphyxia
A. CN
1. Poison electron transport chain.
2. Cyanide is natural.

B. CO
1. Irrevocably bind to hemoglobin
2. Smoke, auto exhaust, smoker
a. Smoke inhalation 90% in healthy
b. Fatal 40-90 depending on disease
c. Car 40-60%
d. Smokers 10%
e. Non-smokers 1-5%
f. Don’t put gurney behind the ambulance

X. Drowning
A. Sweet water

B. Salt water

C. Retardation of decomposition

D. Diatoms

Sunday, 16, October, 2011

Sappy Cat Blogging

Filed under: Cat Blogging — williamthecoroner @ 13:15

National Feral Cat Day.

Friday, 14, October, 2011

Burns and Electrocutions

Filed under: Forensics,Teaching — williamthecoroner @ 12:03

Shocking that this is so late…
Burns, Explosions, Electrocutions
I. Thermal injuries
A. Classification of burns
1. First degree—sunburn, superficial
2. Second degree—blistering
3. Third degree—full thickness burns
No pain, scar
Contractutres and keloids
4. Fourth degree burns—charring
5. Severity—
a. Intensity of heat
b. Duration of exposure
c. How hot object conducts heat/density
Cell injury 65 C 149 F protein denaturati0n, burn toxins.
Early death shock, late (week) uremia
B. Rule of nines
1. Head 9 %
2. Trunk 18%
3. Back 18%
4. Arms 9%
5. Legs 18%
6. Gentials 1%
7. Different for kids

C. Incineration of bodies
1. Cremation 1.5h at 1500 F $8.00 natural gas
2. House fire under 1300 F
3. Obesity adds fuel,
4. Clothes may protect or act as wicks
a. Mr. Roberts shirts
b. Polyester melts
5. Rayon “Mother-in-law silk”

D. Fire artifacts
1. Heat fixation
2. Heat desquamation
3. Pugilistic attitude
4. Skin splits
a. follow muscle fibers
b. perpendicular due to trauma
5. Epidural
a. blood boils in brain out of saggital sinus
6. Heat fractures
7. Decomposition delayed, cooking

E. CO
1. Flash fires
a. Granger road accident
b. Self-immolation
2. Can be quite high
3. Higher CO, better health of victim

F. Soot below larynx

G. Scalding
1. Liquids over 120F
2. Mouth more resistant than skin
3. Palm more resistant than face,
4. Duration 20 s 131 F, 1s @ 150 F
5. Clothing worsens damage

II. Bombs
A. Identification & reconstruction

B. Blast
1. “overpressure”
2. Burst eardrums, hollow viscera
3. Injury to lungs
4. Trauma

C. Fire
1. High order explosions
a. Liberate lot of energy
b. Conversion of chemical to thermal energy

2. Incendiary
3. Napalm
a. 1800 F
b. Jellied gasoline Napthitic and palmitic acids (detergent)
c. Sticks and burns
d. Asphyxia flash and inhalation
4. Magnesium, Phosphorus
a. Burn really hot
b. Burn on contact with water

D. Projectiles

E. Home made bombs
1. Molotov cocktails
2. Practice grenades
3. Smoke grenades
4. Pipe bombs
5. 1 pint of gasoline energy of 2 sticks of dynamite
6. Plastique

US Navy

Filed under: Boom,Circle Game — williamthecoroner @ 11:21

Happy 236 Birthday, US Navy and vets! Old NFO, Misfit, Lex, Bubblehead Les, etc., etc.

Sunday, 9, October, 2011

Amish Violence Noted

Filed under: Uncategorized — williamthecoroner @ 15:56
Tags: , ,

I knew that eastern Ohio had a problem with Amish prostitution, particularly at truck stops. I just today learned of Amish home invasions and shavings.

Saturday, 8, October, 2011

Separated By A Common Language

Filed under: Blogania — williamthecoroner @ 17:47

One word, so many meanings.

Secure. In the Navy, it means to stop what you’re doing and tidy up. Or, as the Earth-Bound Misfit put it.

In the Navy, “to secure a building” meant to sweep down the halls, empty the trash, turn out the lights and lock the doors. To the Army, “secure the building” meant to post a guard at the front door. To the Marines, “secure the building” meant to attack the building, blow a hole in the side, go in and kill or capture everyone inside. To the Air Force, “secure a building” meant to negotiate and sign a lease for the building.

Friday, 7, October, 2011

Sappy Cat Blogging

Filed under: Cat Blogging — williamthecoroner @ 21:36

Off to testify, my brother in Mudville. Where there may or may not be joy, I don’t really have a dog in the fight. But we shall see what we shall see. My studentlets are in the hands of a sub and the graduate students have the day off.

I like the way this guy thinks, from Misanthropic.

Thursday, 6, October, 2011

Histology #12

Filed under: Teaching — williamthecoroner @ 15:13

The nervous system(s). Central, peripheral, autonomic, enteric. Neurons, their supporting cast, and synaptic transmission. A little neurophysiology, and why neuroscientists love calamari. A touch on diseases–but one lab is really not enough time for all the cool neuroscience stuff there is to talk about.

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