New CPR - @ JEMS.com


New CPR

Purdue Develops Alternate Technique

 

 
 
 

Ann-Marie Lindstrom | | Saturday, July 26, 2008


JEMS.com Editor_s Note: For more on improved CPR rates, check out ˙Groundbreaking Study Doubles SurvivalÓ. For an exclusive look at this study, look for ˙Communities Implement Proven Prehospital Cardiac Arrest Interventions Ó in the November EMS Insider.

CPR has been around since the 1960s. Although it has changed through the decades, the biggest change yet may be on the horizon.

That method is called ˙only rhythmic abdominal compressionsÓ (OAC-CPR), and Purdue researchers found it more efficient than current chest compression CPR, says Leslie Geddes, PhD, Showalter Distinguished Professor Emeritus in Purdue University's Weldon School of Biomedical Engineering.

Abdominal organs hold about a quarter of the total blood volume, and the researchers found in the study (published in the September issue ofAmerican Journal of Emergency Medicine) that pushing the abdomen with the same force recommended for standard CPR (100 lbs. of pressure, 100 times a minute) provided 25% more blood to the heart than the standard method. ˙You can squeeze all of that into the central circulation when you press on the abdomen,Ó Geddes says.

With OAC-CPR, mouth-to-mouth resuscitation isn't necessary because the abdominal compressions expel air from the lungs by depressing the diaphragm up (toward the head). Between compressions, the lungs inhale. This is an important difference from standard CPR, because people -- even medical staff -- are sometimes reluctant to perform mouth-to-mouth ventilation. In a 1993 study, 45% of the 433 doctors and 80% of the 152 nurses polled said they would refuse to administer mouth-to-mouth resuscitation on a stranger.

The idea for the OAC-CPR study began in the 1980s, when Geddes says Purdue doctoral nursing student Sandra Ralston observed that blood flow doubled when abdominal compressions were administered between chest compressions during CPR. Geddes says, ˙So I started thinking, what would happen if you just pushed on the abdomen and eliminated chest compressions entirely?Ó

He created a pressure applicator, described as a ˙scaled-down version of a baseball home plate,Ó that's contoured to compress the abdomen without pushing the ribs. However, he says the procedure can be performed with just the hands.

˙The recent scientific paper Ú was an animal study performed on 11 pigs. The paper alone does not provide sufficient data to prompt a change in AHA's recommendations for performing CPR,Ó an American Heart Association spokesman said. ˙During the development of the 2000 and 2005 ECC guidelines, we evaluated previous studies conducted at Purdue regarding a similar technique called Interposed Abdominal Compressions CPR (IAC-CPR).Ó

When the AHA evaluated IAC-CPR, it concluded, ˙[T]here is insufficient evidence to recommend for or against the use of IAC-CPR in the out-of-hospital setting.Ó




Connect: Have a thought or feedback about this? Add your comment now
Related Topics: Cardiac and Circulation, Industry News, Research, Training

 
What's Your Take? Comment Now ...

Featured Careers & Jobs in EMS

Get JEMS in Your Inbox

 

Fire EMS Blogs


Blogger Browser

Today's Featured Posts

 

EMS Airway Clinic

Innovation & Advancement

This is the seventh year of the EMS 10 Innovators in EMS program, jointly sponsored by Physio-Control and JEMS.
More >

Multimedia Thumb

Press Conference, East Village Explosion and Collapse

Fire is contained to four buildings; 12 people have been injured.
Watch It >


Multimedia Thumb

D.C. Mayor Adds Ambulances to Peak Demand Period

10 additional ambulances will be on the streets from 11 a.m. to 11 p.m.
Watch It >


Multimedia Thumb

Utah Commission Privatizes Ambulance Service

Mayors in Iron County loose management fight.
Watch It >


Multimedia Thumb

Ambulance Delay Raises Concerns over Response Times

Officers give up after waiting 20 minutes for an ambulance.
Watch It >


Multimedia Thumb

Patient Carry during Snowstorm

Firefighters, medics and officers lend a hand in Halifax.
More >


Multimedia Thumb

Terror Attack in Tunisia

19 people killed outside of a museum.
More >