There is no conclusive evidence in the literature that supports clinical clearance of the spine in the prehospital environment. There is enough variation between prehospital and in-hospital assessments to recommend that prehospital removal of spinal immobilisation be avoided.
INTRODUCTION: Traditional EMS teaching identifies mechanism of injury as an important predictor of spinal injury. Clinical criteria to select patients for immobilization are being studied in Michigan and have been implemented in Maine. Maine requires automatic immobilization of patients with "a positive mechanism" clearly capable of producing spinal injury. OBJECTIVE: To determine whether mechanism of injury affects the ability of clinical criteria to identify patients with spinal injury. METHODS: In this multicenter prospective cohort study, EMS personnel completed a check-off data sheet for prehospital spine-immobilized patients. Data included mechanism of injury and yes/no determinations of the clinical criteria: altered mental status, neurologic deficit, evidence of intoxication, spinal pain or tenderness, and suspected extremity fracture. Hospital outcome data included confirmation of spinal injury and treatment required. Mechanisms of injury were tabulated and rates of spinal injury for each mechanism were calculated. The patients were divided into three different high-risk and low-risk groups. RESULTS: Data were collected for 6,500 patients. There were 209 (3.2%) patients with spinal injuries identified. There were 1,058 patients with 100 (9.4%) injuries in the first high-risk mechanism group, and 5,423 patients with 109 (2%) injuries in the first low-risk group. Criteria identified 97 of 100 (97%) injuries in the high-risk group and 102 of 109 (94%) in the low-risk group. Two additional data divisions yielded identical results. CONCLUSION: Mechanism of injury does not affect the ability of clinical criteria to predict spinal injury in this population.
OBJECTIVE: Determine the level of agreement between emergency medical technicians (EMTs) and emergency physicians (EPs) when applying an existing emergency medical services/fire department protocol for out-of-hospital clinical cervical spine injury (CSI) clearance in blunt trauma patients. METHODS: Prospective observational study of consecutive blunt trauma patients transported by emergency medical services/fire department during a 3-month study period. The setting was an urban Level I trauma center. Measurement of interrater agreement (kappa) was determined. RESULTS: Mean age of the 190 patients was 34+/-19 years (range, 6 -98 years). Fifty-nine percent of the patients were male. One hundred forty-six patients (77%) were immobilized by EMTs; 17 of these patients were clinically cleared by EPs. Forty-four patients (23%) were clinically cleared by EMTs and presented without CSI precautions; of these, 61% (27 of 44) were immobilized by EPs and 57% (25 of 44) had cervical spine radiographs obtained. Overall, 141 patients (74%) required radiographic clearance. CSI were detected in five patients (2.6%); all five were immobilized in the out-of-hospital setting. Overall disagreement between EMTs and EPs regarding out-of-hospital CSI clearance occurred in 44 patients (23%) (kappa=0.29; 95% confidence interval, 0.15-0.43; p less than 0.01). CONCLUSION: Significant disagreement in clinical CSI clearance exists between EMTs and EPs. Further research and education is recommended before widespread implementation of this practice.
An even older study, done in 1998, but the data is still relevant (also, keep in mind, the Trauma.org article is from 2002). This study doesn't disprove the ability of paramedics, or EMTs for that matter, to clincally clear a cervical spine. This abstract questions whether EMTs and emergency physicians agree. I hate to point this out, but according to the abstract, the EMTs properly immobilized every patient that came back with a positive cervical spine injury. This doesn't disprove the purpose of the study however. What I get out of this is the need for the emergency physicians to be on board with a prehospital spinal clearanace protocol.
These were the only two references cited by Trauma.org. Neither reference seems to disprove the ability of an EMT to clinically clear the cervical spine. What was the original statement in question though?
There is no conclusive evidence in the literature that supports clinical clearance of the spine in the prehospital environment. There is enough variation between prehospital and in-hospital assessments to recommend that prehospital removal of spinal immobilisation be avoided.
We still don't have the conclusive evidence to support cervical spine clearance. One abstract questioned the relationship between MOI and cervical spine injuries. The other study states that physicians and EMTs disagree, but that isn't necessarily a definitive reason to avoid prehospital clearance of the cervical spine. Just because the studies were both conducted in the prehospital environment doesn't mean that they tested the ability of the prehospital personnel.
Part II will include my own research on this topic.
Works Cited
[1]Brohi K. 2002. "Clinical Clearance of Cervical Spine Injury" Trauma.org, Link to article
[2]Domeier RM, Evans RW, Swor RA, Hancock JB, Fales W, Krohmer J, Frederiksen SM, and Shork MA. 1999. "The reliability of prehospital clinical evaluation for potential spinal injury is not affected by the mechanism of injury." Prehospital Emergency Care: Official Journal Of The National Association Of EMS Physicians And The National Association Of State EMS Directors 3, no. 4: 332-337. MEDLINE with Full Text, EBSCOhost (accessed May 30, 2009).
[3]Meldon SW, Brant TA, Cydulka RK, Collins TE, and Shade BR. 1998. "Out-of-hospital cervical spine clearance: agreement between emergency medical technicians and emergency physicians." The Journal Of Trauma 45, no. 6: 1058-1061. MEDLINE with Full Text, EBSCOhost (accessed May 30, 2009).
16 comments:
Is the NEXUS study the one that looked at pre-hospital immobilization and proved its worth for us?
I think a copy of the Maine pre-hospital spinal clearance protocol would be in order also.
I usually clear the C-Spine in the field; I have yet to have a miss.
The NEXUS study is going to be a big topic in part II.
Good request on the Maine protocol, I will check it out. Not sure if I will be able to find the 1999 version.
Congrats on having no misses. What criteria do you use to come to the conclusion not to immobilize?
Okay, I didn't find the 1999 version of the Maine protocol but I found Michigan's. I also found some other pretty interesting stuff that will make it into part II.
There is literature out there in support of prehospital C-Spine clearance. I will let you list what you have.
In Pa., we have statewide protocols and we have a BLS spinal immobilization protocol. Not a clearance protocol. The premise being that there has to be a reason to do any treatment, including spinal immobilization because it is NOT benign. It is good to have a state EMS medical director who was a Pa. medic in a busy system who believes in evidence based medicine.
Anyway, the protocol basically says if you are going to immobilize someone, considering the complications of it, you better have a damned good reason to do it.
It lists the MOI and when to SUSPECT it. Penetrating head trauma is NOT a suspician. Neither is penetrating neck or back trauma without neuro deficits. I actually seen a couple of retroactive studies justifying these exclusions.
Then, if the patient has no altered LOC or intoxication to elaborate on symptoms, no distracting injury (that can be discretionary, though), and no signs or symptoms of a spinal injury, then the patient should NOT be immobilized. Of course there is the caveat of pediatrics and geriatrics and this is where clinical judgement is necessary.
Now, where is the evidence that shows spinal immobilization even works? I havn't seen any despite my dilegent searches since the late 90s. Can we prove for sure there was ever a patient who was not immobilized, suffered a cord injury with deficits as a result of NOT being immobilized and not on the initial injury or the medics dropping the patient? Evidence. I want it.
If I am going to take the extra time to immobilize someone properly, putting them on a hard and painful board than may inhibit their breathing, especially CHF patients, not to mention tissue breakdown, I want evidence to support its use.
Do you have a C-Spine algorithm in your protocol ? Ours goes like this..
Mechanism of Injury
Suspicious for Spinal Injury ?
Uncertain or positive -->Cspine
patient age <12 ? --> Cspine
anxious or Uncooperative --> CSpine
Difficulty Understanding --> CSpine
altered mental status or evidence of intoxication ? --> Cspine
Distracting injuries
(To patient or Others) --> CSpine
spinal pain or Tenderness on palpation ? --> Cspine
abnormal neurological exam
abnormal motor Function
abnormal sensation ? -->Cspine
patient experiences neck pain
with active or passive: flexion,
extension, or rotation? -->CSpine
None of the above ? Immobilization not indicated.
http://www.nh.gov/safety/divisions/fstems/ems/advlifesup/patientcare.html
See Page 98 under 'Advanced Spinal Assessment'
Shaggy,
You are asking the same question as RM. I am going to touch on that in further posts. I don't know how you would prove something like that. I am also going to touch on whether the backboard the best immobilization device on the market?
Here's a little chart I made up myself...
http://www.bemetweb.com/GRAPHS/FULL-SMR.htm
Not exactly scientific, but funny.
I think I saw a small study done showing better results with the full body vacu-splint over the backboard in comfort and immobilization. One reason I pushed to have them purchased at my service. It has its difficulties in that you cannot carry it end to end but side to side, but otherwise I like it.
We don't have an algorithm like that above. I would like to believe we are thinking medics. I am also not to happy with the algorithm above as why is the age of 12 the majic age? I don't necessarily see anxiety as always an issue, though it can. And my biggest problem: Immobilizing based on MOI. I base NO treatment based on MOI. MOI only guides my assessment process.
I love the bar graph, by the way. Cute!
Shaggy,
You keep blowing my surprises. I was going to talk about alternative immobilization devices. I read somewhere Dr. Bledsoe was speaking highly of full body vacuum splints. Makes sense. I have so much to talk about on this topic...
Sorry. Next time I will keep my trap shut. My boss says I talk too much, especially without thinking first.
I'm just kidding with ya Shaggy, your comments are always welcome. Tell your boss that's a sign of honesty. Honest people don't have to think about what they say before they say it, unfortunately the truth is sometimes brutal; hints the phrase brutally honest.
Exellent post on spinal c. All three parts where greate. Keep up the good job! / best regards from à swedish paramedic.
Neither is their conclusive scientific evidence to demonstrate that immobilizing patients improves neurological outcomes, or that the practice of boarding actually accomplishes what we intend.
In fact, there is a growing body of evidence that demonstrates just the opposite.
Several years ago, Maine dropped the MOI criteria from its statewide spinal clearance protocols, primarily because MOI is such an inaccurate predictor of injury.
Thus far, no one has seen an inordinately high number of quadriplegics tooling around Bangor or Portland in their motorized wheelchairs. No news of record malpractice settlements, either.
Personally, I think the truly occult spinal injury belongs in the same category as Bigfoot, extraterrestrial life, and the female clitoris - something most men have heard of, but very few have actually seen.
AD, did you just make the comparison between a spinal injury and a clitoris? Only you could find that connection. LOL
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