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  1. #1
    FIGJAM lutan1's Avatar
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    Default Injured By High Pressure Hydraulic Fluid

    Today on the Techrescue website, we received a PPT presentation of a reported injury from high pressure hydraulic fluid from a rescue tool. (The tool developed a leak, releasing fluid uner pressure)

    The information in the PPT is quoted below (I know nothing more than what appears in the presenation with a few photos)
    Hydraulic Fluid in use was a Mineral Oil – Unknown at present

    Pressure of fluid was 630Bar( approx 9,150 psi)

    Equipment in use: Scissor cutters used at Road Traffic Accidents to release occupants.

    Location of Accident: Fire Service Training Ground

    Risk Assessments were in place and Full PPE was worn.

    Training Session under controlled conditions within Brigade Training Premises

    IP was to cut through sample vehicle using scissors.

    Normal practise at time was for the hydraulic hose to be run over operators shoulder to tool in use.

    Hose ruptured at ferrule area resulting in release of fluid through PPE (Leather gauntlets) to IPs hand.

    IP went to A&E and initial prognosis was “keep clean and rest”.

    By chance a specialist observed and intervened.

    Mineral Oil had already started to “eat away” fatty tissues in hand and began travelling through the hand and up the arm.

    IP had 5 operations to cut away oil deposits and was on his last chance before losing arm. It was successful

    Wound could not be sutured due to tissue damage by oil so wound was gradually closed over weeks.

    IP was eventually medically discharged from force and is severely disabled in this hand.

    Hydraulic Fluid in use has been changed to “Aero Shell Fluid 4”.

    Fire Brigade has passed learning's on to its associated Brigades.

    Litigation is in place:
    IP to Brigade
    Brigade to Equipment Manufacturers.
    IP awaits final outcome
    Timescale: 2 years and counting
    Go to this link to get a copy- TECHRESCUE- Australia's leading Technical Rescue website
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    Last edited by lutan1; 01-18-2005 at 04:00 PM.
    Luke


  2. #2
    MembersZone Subscriber BurnCMSFD's Avatar
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    Default PP

    Lutan, this is a eye opener. What are the chances of getting you PP sent to me via email. I believe this would benifit the troops to know how dangerous the tools we handle really are. Thanks for the thread.
    burn
    jlmk@gci.net
    Burn<br />LT/EMT/Inst />Central Mat-Su FD<br />Wasilla Alaska

  3. #3
    FIGJAM lutan1's Avatar
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    Follow the link above, register (free) with Techrescue and you can download to your hearts content!!
    Luke

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    Default

    An event like this occured in Scotland. As part of our Rescue unit training in London we have this presentation. This injury is caused by a small pin hole in the hydraulic hose. When hydraulic oil is under pressure at 720 bar, if you are not wearing protective equipment it will pierce your skin and produce this kind of injury.

    Hose inspection and PPE are vital to prevent this.

    Take Care

  5. #5
    Forum Member firenresq77's Avatar
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    Default

    Thanks for the info.......
    The comments made by me are my opinions only. They DO NOT reflect the opinions of my employer(s). If you have an issue with something I may say, take it up with me, either by posting in the forums, emailing me through my profile, or PMing me through my profile.
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  6. #6
    Forum Member Weruj1's Avatar
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    Man that is just plain 'ol nasty !
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  7. #7
    Forum Member MetalMedic's Avatar
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    Can anyone speculate on what the outcome would have been if this were a low pressure system instead of a high pressure one?
    Richard Nester
    Orrville (OH) Fire Dept.

    "People don't care what you know... until they know that you care." - Scott Bolleter

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    Metal - Are you saying that a lower pressure system would not cause this type of injury???

    Hydraulic tools whether they run at 5000 or 10500 psi are both considered high pressure. I know one thing, I would rather have mineral fluid enter my body than phosphate esther or ethyol glycol.

    Its an unfortunate reminder that are jobs are dangerous and we should always be checking our equipment.

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    It looks to me that Metal is just asking if anyone knows if there would be a difference.

    It really would be interesting to see if there was a difference given the same situation.

    Would the outcome be the same if he was wearing the same PPE but was using a 5000+/-PSI system?

    Has any manufacturers performed a test to identify the difference? If there is a difference,it would be a great selling point!!

    Stay Safe!

    Mike

  10. #10
    Forum Member Bones42's Avatar
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    Would the outcome be the same
    Does anyone wear PPE that is designed to "block" a 5000psi stream of fluid from a pinhole leak? I'm betting our gear wouldn't stop it at 1000psi.
    "This thread is being closed as it is off-topic and not related to the fire industry." - Isn't that what the Off Duty forum was for?

  11. #11
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    I don't believe I said anything about "blocking". All I am asking is if the injury would be as severe?

    My thought is that 5000 LESS psi might not cause as much damage.

    I'm no "expert" because there is always something to learn.

  12. #12
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    The farm Medic program has some pretty nasty pictures of skin damage caused by farm equipment operating at presures of 800 - 2500 psi. So I am guessing that anything over the tension strength of skin would be considered high presure. 5,000 or 10,000 would still be FUBAR.

    Zmag

  13. #13
    Forum Member Bones42's Avatar
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    The major problem is the fluid getting under the skin. It's not the cut or opening that will occur, it's the problem the fluid itself will cause. As stated, mineral oil, under the skin, will begin to eat away fatty tissue. There may be (and probably was) a very small "puncture point" where the fluid entered. The picture above is probably (Lutan1, correct me if wrong) not the damage that the fluid leak caused, but what had to be done to the hand to remove all the bad tissue. Whether it's 10psi or 10,000psi, the fluid getting under the skin is the problem.
    "This thread is being closed as it is off-topic and not related to the fire industry." - Isn't that what the Off Duty forum was for?

  14. #14
    Forum Member MetalMedic's Avatar
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    Originally posted by rescuemaster
    Metal - Are you saying that a lower pressure system would not cause this type of injury???

    Nope.. I wasn't "saying" anything, I was asking the question:

    Can anyone speculate on what the outcome would have been if this were a low pressure system instead of a high pressure one?
    I agree that I don't want any foreign material under my skin, regardless of how it got there. Was this incident the result of a pin-hole leak, or a catastropic failure of the hose or a coupling? I thought it was the latter, but I'll have to go back and re-read that now.

    Anyway, thanks to those who answered my question. For risk of being misunderstood again, can I ask if anyone is aware of any testing to learn the effects of various hydraulic fluid being directed on various protective clothing (especially gloves) and various pressures?
    Last edited by MetalMedic; 01-19-2005 at 05:59 PM.
    Richard Nester
    Orrville (OH) Fire Dept.

    "People don't care what you know... until they know that you care." - Scott Bolleter

  15. #15
    Forum Member MetalMedic's Avatar
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    Hose ruptured at ferrule area resulting in release of fluid through PPE (Leather gauntlets) to IPs hand
    Ok... what is a "ferrule" in the southern hemisphere?
    Richard Nester
    Orrville (OH) Fire Dept.

    "People don't care what you know... until they know that you care." - Scott Bolleter

  16. #16
    FIGJAM lutan1's Avatar
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    picture above is probably (Lutan1, correct me if wrong) not the damage that the fluid leak caused, but what had to be done to the hand to remove all the bad tissue.
    I know nothing more than you guys. My info is straight from the PPT presentation.

    Ok... what is a "ferrule" in the southern hemisphere?
    It's part of the hose swaging assembly. (It's part of the components to fit the hose fitting onto the end of the hose- does that make sense?) An example of some are here (Not necessarily for hydraulics, but you'll get the idea!
    Luke

  17. #17
    Forum Member RyanEMVFD's Avatar
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    Judging from the picture that is from the surgery. Entry of the fluid under pressure is usually a small pinpoint location. Often the person doesn't know it happened or felt anything. The dangerous problem is that when it occurs no one thinks it is serious. This is one reason why checking the hose for leaks by running your hand gloved or not down the line should not be allowed.
    NREMT-P\ Reserve Volunteer Firefighter\Reserve Police Officer
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  18. #18
    Forum Member spearsm's Avatar
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    It took me too darn long to find a pict.
    It is the part that crimps down to the hose. Also a ferrule could be the part of the tubing fitting that crimps down to the outside Dia. of the tubing to make a seal. Here is a pict of a ferrule used on hyd hoses that we use.
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  19. #19
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    Thanks for the info on the ferrules, now we have to figure out what "Swagging" is.

    Zmag

  20. #20
    FIGJAM lutan1's Avatar
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    With regards to swaging, it's another term I guess we use here, but its the applicaiton of the stuff that spearsm refers too....

    I wush you guys would get on board with our terminology, driving on the correct side of the road and using the metric system
    Luke

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