Corner left
Corner right

September 5, 2011

Man Chokes to Death During Air Flight... Preventable?

News media reported on Sept 5, 2011 about Robert Rippingale who choked to death during a flight from Singapore to New Zealand. He was with his girlfriend who noted he was shaking and turning blue after eating an in-flight meal. A doctor and two nurses attempted to save him though unsuccessfully.

The article reports that CPR was performed to try and save the man, but the obvious question is whether a Heimlich maneuver was done. Obviously, as long as an obstruction is present, doing CPR is bound to fail.

Assuming a Heimlich maneuver was performed and failed to remove the airway obstruction... what could have been done to save this man's life?

Let's assume best case scenario of having an experienced ENT surgeon was on board.

The surgeon could try to relieve the obstruction manually by looking down the throat using a laryngoscope and using instruments to remove the food obstruction from the airway.

If that fails, an emergency cricothyroidotomy would have saved this man's life. This emergency life-saving procedure is in essence making a hole in the neck directly into the airway. It is slightly different from a tracheostomy in terms of where anatomically this hole is made, but the end-result is the same.

Question is, EVEN if you had an experienced ENT on board, would an airplane even have a laryngoscope as well as instruments to remove a food impaction? Would an emergency cricothyroidotomy even be possible due to prohibition of sharp objects in airplanes? After all, you still need a knife of some sort to make the incision and to dissect down to the airway. Without a sharp instrument, this step would be impossible even if you have someone who knows what to do.

According to Appendix A to Part 121 of Title 14 of the Code of Federal Regulations (14 CFR 121), the specific requirements for US carriers regarding first aid and emergency aid kits are as follows:

For 0-50 seats, one kit is required; 51-150 seats, two kits are required; 151-250 seats require three; and more than 250 seats require 4 kits.

These kits must include, at a minimum:

  • 16 Adhesive bandage compresses, 1-inch
  • 20 Antiseptic swabs
  • 10 Ammonia inhalants
  • 8 Bandage compresses, 4-inch
  • 5 Triangular bandage compresses, 40-inch
  • 1 Arm splint, noninflatable
  • 1 Leg splint, noninflatable
  • 4 Roller bandage, 4-inch
  • 2 Adhesive tape, 1-inch standard roll
  • 1 Bandage scissors

Also, at least one approved medical kit must be on board that includes at a minimum:

  • 1 Sphygmonanometer
  • 1 Stethoscope
  • 3 Airways, oropharyngeal (3 sizes): 1 pediatric, 1 small adult, 1 large adult or equivalent.
  • Self-inflating manual resuscitation device with 3 masks (1 pediatric, 1 small adult, 1 large adult or equivalent).
  • CPR mask (3 sizes), 1 pediatric, 1 small adult, 1 large adult, or equivalent.
  • 1 IV Admin Set: Tubing w/ 2 Y connectors
  • 2 Alcohol sponges
  • 1 Adhesive tape, 1-inch standard roll adhesive.
  • 1 pair Tape scissors
  • 1 Tourniquet
  • 1 Saline solution, 500 cc
  • 1 pair Protective nonpermeable gloves or equivalent
  • 6 Needles (2-18 ga., 2-20 ga., 2-22 ga., or sizes necessary to administer required medications).
  • 4 Syringes (1-5 cc, 2-10 cc, or sizes necessary to administer required medications).
  • 4 Analgesic, non-narcotic, tablets, 325 mg
  • 4 Antihistamine tablets, 25 mg
  • 2 Antihistamine injectable, 50 mg, (single dose ampule or equivalent).
  • 2 Atropine, 0.5 mg, 5 cc (single dose ampule or equivalent).
  • 4 Aspirin tablets, 325 mg
  • 1 Bronchodilator, inhaled (metered dose inhaler or equivalent).
  • 1 Dextrose, 50%/50 cc injectable, (single dose ampule or equivalent).
  • 2 Epinephrine 1:1000, 1 cc, injectable, (single dose ampule or equivalent).
  • 2 Epinephrine 1:10,000, 2 cc, injectable, (single dose ampule or equivalent).
  • 2 Lidocaine, 5 cc, 20 mg/ml, injectable (single dose ampule or equivalent).
  • 10 Nitroglycerin tablets, 0.4 mg
  • 1 Basic instructions for use of the drugs in the kit.

It seems that there are airways of different sizes available, but no laryngoscope or other instruments to remove airway foreign objects.

Nowhere is a scalpel or knife listed either. You have needles and syringes which theoretically can be used to "poke" into the airway. However, though an 18 gauge needle might work for a chipmunk's airway, it is not sufficient for a full-grown man. It would be like breathing through a straw, but 50 times smaller and even more difficult to breath thru.

So it appears that in the event of an airway obstruction during an air-flight for which Heimlich fails, you can have the world's best surgeon present, and the man still would have died.

Some surgeons would argue a strong, stiff ball-point pen could have been used to perform the cricothyroidotomy, but as someone who has performed a dozen emergency cricothyroidotomies and tracheotomies in the past, even under the best of circumstances with a knife and being on a hospital floor with help around, it is hard. Furthermore, skin and the windpipe is made of tough "fabric" and trying to punch a ball-point pen through is laughable. Try doing it yourself on a chicken with the skin on.

Read the news article here.

September 3, 2011

Best Medication for Dizziness

So how would one go about figuring out the best medication for dizziness due to motion-sickness leading to nausea and even vomiting?

Well, step 1... Put a bunch of people in a machine and figure out the necessary motions that will cause dizziness.

Step 2... Do the same thing, but this time, put people on different medications and figure out what works the best.

Sound crazy?

Well it has been done by the friendly folks at NASA. Why would they perform such unpleasant experiments? It's for the fighter pilots and astronauts who may encounter motion sickness where dizziness may mean the difference between life and death and have no alternative other than medications.

So what medication did they find works the best?

Through trial and error, they have found that a combination of oral scopolamine (not the patch), to suppress vomiting, and dextroamphetamine, to counteract scopolamine's potential to induce drowsiness, reduced the incidence of motion sickness from 70 percent to about 12 percent among passengers in the "Vomit Comet"—a DC-9 aircraft used to achieve brief periods of zero gravity as part of NASA's Reduced Gravity Program.

They have also found that conditioning (repeating movements that induce dizziness) over and over again does result in the development of tolerance to a motion environment in 95% of individuals.

Read more about this here.

Surgery Without Wires

Surgery is messy... and I don't mean in terms of blood and guts...

What I mean are wires, cables, tubing, etc.

Let's take a routine tonsillectomy and adenoidectomy for example...

  1. Electric cord for the operating table

  2. Electric cord for the anesthesia machine

  3. Electric cord for the surgeon's headlight

  4. Light cord from the surgeon's headlight to the lightbox

  5. Breathing circuit tube from the patient to the anesthesia machine

  6. Carbon dioxide outflow tube from the patient to the anesthesia machine

  7. Suction tubing from the surgical table to the vacuum canister

  8. Vacuum cable from the vacuum canister to the wall socket

  9. Electrocautery cable (along with electric cord to power the machine)

  10. Coblation cable (along with electric cord to power the machine)

  11. IV fluids lines from patient to IV bags

  12. EKG lines

  13. Grounding pad cable

  14. All the wires and cables that go with running a computer

  15. etc etc etc

It's an "organized" chaos of cords, tubes, electric wires, etc all emanating away from the patient like a Man-of-Wars jellyfish.

Pictures shown on the internet as well as movies are "staged" and appear to be neat and orderly, but believe me (as someone who has had pictures taken), surgeons and nurses take the time to "tidy" things up before the picture or video is recorded giving a false impression of neatness.

99% of the time, everyone knows where everything is, so it's not a problem. However, when an unanticipated emergency happens, things get confusing and in fact dangerous to not only the patient, but the staff (I recall one incidence of a nurse running to get a surgical tray, tripping on one of the numerous cords mentioned above, falling, and breaking her hand).

When something stops working... we literally have to trace the cord from source to origin to figure out why something stopped working. With all the cords present, this tracing needs to be done by hand and eye (analogous to an entertainment system with all the wires in the back, one would trace out the cords by hand and eye).

IS there a better way???

Of course the operating room staff takes the time to bundle and organize the various cords, but the fact remains that the cords are there.

What about wireless technology to power instruments or relay information?

Well, NPR reported on August 23, a young 22 year-old entrepreneur Meredith Perry, who has invented and patented a way to transmit power over the air without the need for wires using ultrasound. Yup... the same ultrasound used to look at a human fetus in the womb.

Her ingenious idea is to use ultrasound to "vibrate" the air which than vibrates a piezoelectric transducer contained within nearby devices. The vibration of the piezoelectric transducer will than generate an electric current which can be stored in a battery and used to power anything that requires energy.

I acknowledge that it may take time before such wireless power is available to power large surgical devices, but one can always hope!

Read the NPR story here.

September 2, 2011

Movie Sets are Dangerous to Ears!

First it was Maggie Q, and now I learn that there are other celebrities with hearing loss due to movie set loud noise exposure.

Leonard Nimoy (Spock of Star Trek fame) suffers from right ear tinnitus due to hearing damage from a special effects explosion during filming of Star Trek episode "Arena".

Similarly, Steve Martin suffers from tinnitus due to hearing damage sustained during filming of a pistol-shooting scene for "¡Three Amigos!" in 1986.

Here is a full list of celebrities with hearing problems.

September 1, 2011

Hearing Loss Can Can Accelerate Brain Volume Loss

Everyone has heard of the saying "If you don't use it, you will lose it."

Well, when it comes to hearing loss, that seems to apply to not just hearing per se, but the actual structure of the brain!

Researchers studied MRI scans of older individuals (ages 60-77) with hearing loss, they found less brain volume in the auditory cortex of the brain which is not entirely surprising. What was surprising was that there was less brain activity on functional MRI scans when these individuals listened to complex sentences (it is just not "hearing" that is lost, but higher level brain function of "comprehension" being lost too).

These results suggest that hearing loss can lead to a systematic decrease in neural activity of speech comprehension and may also contribute to loss of brain volume especially in the primary auditory cortex.

This finding also implies that by wearing hearing aids, such loss can be prevented.

The next step would be to do the same research on patients WITH known hearing loss, but hearing aids have been used. What would be also interesting would be to see if such brain changes can be reversed if hearing aids are used after such brain loss is seen on MRI.

Reference:
Hearing Loss in Older Adults Affects Neural Systems Supporting Speech Comprehension. The Journal of Neuroscience, 31 August 2011, 31(35): 12638-12643; doi: 10.1523/​JNEUROSCI.2559-11.2011


lump in throat clogged ears
Related Posts Plugin
 

Other Topics on ENT Blog

 

Advertise Here!

Advertise Here!

Advertise Here!

 
Corner left
Corner right