World Library  
Flag as Inappropriate
Email this Article

Military Anti-Shock Trousers

Article Id: WHEBN0024222588
Reproduction Date:

Title: Military Anti-Shock Trousers  
Author: World Heritage Encyclopedia
Language: English
Subject: Emergency department, List of EMS provider credentials
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Military Anti-Shock Trousers

Military anti-shock trousers (or Pneumatic Anti-Shock Garments) are medical devices used to treat severe blood loss. They are also indicated for the stabilization of unstable pelvic fractures in the field prior to transport.

Usually called "MAST", and sometimes "pneumatic anti-shock garments" (PASG), they were invented by Lt. Col. Burton Kaplan during the Vietnam War. MAST look like a pair of trousers. They are opened and placed around the legs and pelvis of the patient. Each leg and the pelvic section may then be inflated, applying pressure to the lower half of the body The trousers can be used with sager traction splints and dressings already in place.

MAST are typically carried and used by emergency medical technicians and paramedics, although they are sometimes carried by fire department first responder trucks, and, in some states, first responders can apply and inflate them under direct medical control.

The exact way in which MAST help is uncertain. The most common theory is that the pressure decreases blood flow to the legs (thus increasing availability of blood to the rest of the body) and actually squeezes blood out of the lower body. It may be that increased perfusion to the brain and other organs also have indirect benefits.

There is some controversy over use of MAST.[1] One question is whether the increased peripheral vascular resistance may reduce cardiac output or rupture existing clots. Due to these questions and several human studies that have shown no advantage to patients with a high degree of blood loss above the pelvis, MAST trousers are being used much less often now than they were the 1980s and early 1990s.

I. G. Roberts et al. sought to quantify the effect on mortality and morbidity of the use of MAST in patients following trauma, and published the data in the Cochrane Database of Systematic Reviews.[2]

See also

References

  1. ^ "Permissive Hypotension". trauma.org 8:1. January 2003. 
  2. ^ Roberts IG, Blackhall K, Dickinson KJ. Medical anti-shock trousers (pneumatic anti-shock garments) for circulatory support in patients with trauma. Cochrane Database of Systematic Reviews 2007, Issue 2. Art. No.: CD001856. doi:10.1002/14651858.CD001856.
  • U.S. Patent No. 3,933,150
  • Grant, HD, Murray, Jr., RH. "History of G-suit and MAST" Emergency Care, 2nd ed. 1978.
  • Davis JW, McKone TK, Cram AE. "Hemodynamic effects of military anti-shock trousers (MAST) in experimental cardiac tamponade". Annals of Emergency Medicine. 1981 Apr;10(4):185–6.
  • Traverso LW, Lee WP, DeGuzman LR, Bellamy RF. "Military antishock trousers prolong survival after otherwise fatal hemorrhage in pigs". Journal of Trauma. 1985 Nov;25(11):1054–8.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.