dimanche 2 septembre 2012

Needle Thoracostomy


Needle thoracostomy is a life-saving procedure that is easy to do in patients
with tension pneumothorax. All health care providers should be
aware of this technique.
If conscious, the patient with tension pneumothorax is severely short
of breath and blood pressure is low. If unconscious, the patient may
simply be hypotensive and not breathing well.
If you listen over the chest for breath sounds, you may appreciate a
loss of breath sounds on the side of the pneumothorax, but this may be
difficult to appreciate in the emergency setting.

Another method is to feel the patient’s neck. The trachea shifts away
from the side with the tension pneumothorax.
If you cannot hear breath sounds in either side of the chest, the trachea
is in the midline, and the patient is in shock, treat both sides of the
chest. The patient may have bilateral tension pneumothoraces.
Equipment Needed
1. Large catheter for intravenous access (12 or 14 gauge). A large-bore
needle can be used if a catheter is not available, but the catheter is
safer. The needle can injure an underlying structure more easily.
2. Betadine, if available.
Procedure
1. Apply Betadine to the chest. Simply pour it on—this is an emergency!
2. Place the catheter, with the needle in place, into the affected side of
the chest at the second interspace in the midclavicular line (the
imaginary line drawn perpendicular to the clavicle at its midpoint).
3. Locate the second interspace.
• The second interspace is the space between ribs 2 and 3.
• It can be located by feeling for the spot on the breastbone (sternum)
where the manubrium and sternum meet (the point where
you can feel an elevation in the bone as you rub your fingers up
and down the breastbone).
• Move your fingers to the right or left chest (depending on where
the problem is). You should be at the second interspace when you
are at the midclavicular line.
4. The intercostal vessels run just below each rib. To prevent injury to
these vessels, the catheter should be inserted into the chest at the
second interspace just above the third rib.
5. If you inserted a catheter, remove the needle, but leave the catheter
in place. You will hear a big whoosh from the escaping air.
6. Leave the catheter in place until help arrives.
7. If you used a needle, you should hear the air escape as soon as you
enter the pleural space. Leave the needle in place until help arrives.
8. The patient requires a chest tube for definitive treatment of the
pneumothorax, but you may have just saved the patient’s life.


Emergency needle thoracostomy. At the midclavicular line, insert a large (14-
gauge) needle or vascular catheter into the chest at the second interspace just
above the third rib. You will hear a large rush of air when the needle enters the
chest.

Bibliography
1. Creech O, Pearce CW: Stab and gunshot wounds of the chest. Am J Surg 105: 469–483,
1963.
2. Melio FR: Priorities in the multiple trauma patient. Emerg Med Clin North Am
16:29–43, 1998.
3. Simon RR, Brenner BE: Emergency Procedures and Techniques, 3rd ed. Baltimore,
Williams & Wilkins, 1994, pp 71–75.
4. Walls RM: Cricothyroidotomy. Emerg Med Clin North Am 6:725–736, 1988.
5. Walls RM: Management of the difficult airway in the trauma patient. Emerg Med Clin
North Am 16:45–61, 1998.




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