Military guys are great at coming up with practical solutions. Need to infuse fluid in the field but have no pressure bag or drip stand? Putting the bag under the patient’s body can squeeze fluid in, but the best place under the patient wasn’t known. A volunteer military study infusing saline through a 14G cannula compared six under-body locations: heels, buttock cleft, sacrum, interscapular region, cervical spine and occiput.
The buttock cleft was best.
Using body weight as a pre-hospital fluid infusion device: the relationship between under-body position and flow rate.
J R Army Med Corps. 2008 Mar;154(1):31-3
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